WO2015188477A1 - 触摸装置及驱动方法 - Google Patents

触摸装置及驱动方法 Download PDF

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Publication number
WO2015188477A1
WO2015188477A1 PCT/CN2014/086120 CN2014086120W WO2015188477A1 WO 2015188477 A1 WO2015188477 A1 WO 2015188477A1 CN 2014086120 W CN2014086120 W CN 2014086120W WO 2015188477 A1 WO2015188477 A1 WO 2015188477A1
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Prior art keywords
touch
touch panel
controller
display
signal
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Ceased
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PCT/CN2014/086120
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English (en)
French (fr)
Inventor
马韬
张大宇
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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Priority to EP14882147.3A priority Critical patent/EP3065037B1/en
Priority to US14/769,143 priority patent/US9696846B2/en
Publication of WO2015188477A1 publication Critical patent/WO2015188477A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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 OR CALCULATING; 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
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G06F3/0436—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2203/04101—2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a touch device and a driving method.
  • the capacitive touch screen with in-cell touch technology can save a touch substrate and make the whole display module lighter and thinner than the external capacitive touch screen structure.
  • the structure of the liquid crystal display screen using the in-cell touch technology is as shown in FIG. 1 , and the touch driving electrode (Tx) and the touch sensing electrode (Rx) are formed on the glass substrate on the array substrate side of the liquid crystal display panel, wherein The Tx line is shared with the common electrode (Vcom) line.
  • the Tx and Rx of a liquid crystal display (ie, capacitive touch screen) using in-cell touch technology and various thin film transistor (TFT) display devices generate various parasitic capacitances and coupling capacitances, such as Gatel and Gate2.
  • Gate n represents the gate scan line of each row of pixels
  • Data1, Data2, Datan represent the data scan lines of each column of pixels
  • C LC represents the capacitance between the liquid crystal display panels
  • Cs represents the storage capacitor.
  • FIG. 2(a) shows an example of the timing of display scanning and touch scanning of the external capacitive touch screen, where a1-a60 denotes a display scanning period, and t1-t60 denotes a touch scanning period.
  • the external capacitive touch screen is not affected by the TFT driving signal, and the touch scanning is performed synchronously with the screen refreshing, that is, the display scanning and the touch scanning of the capacitive touch screen are performed simultaneously, and are not mutually exclusive. influences.
  • the scan frequency of the display scan is 60 Hz
  • the scan frequency of the touch scan is 100 Hz.
  • FIG. 2(b) An example of the timing of display scanning and touch scanning of a liquid crystal display using in-cell touch technology is shown, where a1-a60 represents a display scanning period, and t1-t60 represents a touch scanning period.
  • the scanning method adopted by the in-cell touch technology is performed in a blank interval between two frames, that is, the display scanning and the touch scanning of the liquid crystal display need to be performed in a time-sharing manner.
  • the scan frequency of the display scan is 40 Hz
  • the scan frequency of the touch scan is 40 Hz.
  • the system block diagram of the liquid crystal display using in-cell touch technology is shown in Figure 3. Due to the limitation of the timing controller and driver data transmission rate and sub-pixel charging time, the touch scan time t allocated per frame is limited. . When t is small, the scanning of Tx and Rx cannot be completed, so it is necessary to increase the t appropriately. The current way to increase t directly is to increase the scanning time of one frame, and accordingly the allocated touch scanning time is also increased. However, this means that reducing the frame rate will affect the display of the screen, and problems such as flickering and smear.
  • the liquid crystal display using the in-cell touch technology uses a time-division driving method, and the liquid crystal display cannot operate at a higher display refresh rate without touching.
  • the embodiment of the invention provides a touch device and a driving method, which can make the touch device work at a higher display refresh rate when there is no touch, and improve the display effect.
  • the embodiment of the invention provides a touch device, comprising: a touch panel, configured to display content, refresh the displayed content according to the display scan signal, and can sense the touch on the touch panel, and cooperate with the touch controller.
  • the touch controller is configured to output a display scan signal to the touch panel, and the touch controller is configured to scan and locate the touch on the touch panel; a sensor configured to detect whether an object is in contact with or close to the touch panel, and outputs a first indication signal when no object contacts or approaches the touch panel; when an object contacts or approaches the touch panel, Outputting a second indication signal; and a controller configured to control the timing controller to output a first display scan signal upon receiving the first indication signal; and upon receiving the second indication signal, Controlling the timing controller to output a second display scan signal; wherein The scanning frequency of the first display scan signal is higher than the scan frequency of the second display scan signal.
  • the controller is further configured to:
  • the display scan signal output by the timing controller is different when there is a touch to the touch panel and no touch to the touch panel.
  • the touch controller does not work when there is no touch. Therefore, the touch device provided by the embodiment of the present invention can work at a higher display refresh rate when there is no touch, improve the display effect, and can reduce power consumption.
  • the senor comprises a transmitter and a receiver, wherein:
  • the emitter is configured to emit light waves or sound waves to the vicinity of the touch panel
  • the receiver is configured to receive the light wave or sound wave, and determine whether an object contacts or approaches the touch panel according to the change of the light wave or the sound wave.
  • the sensor includes the transmitter and the receiver, it is more convenient and simple to detect whether an object is in contact with or close to the touch panel in practical applications.
  • the number of transmitters is equal to the number of receivers.
  • the emitter is located in a four corner area of the touch panel.
  • the transmitter is disposed in the four corner areas of the touch panel, which is convenient and simple in practical applications.
  • the number of the transmitters is two.
  • the number of transmitters is set to two, which is convenient, simple, and saves the generation cost in practical applications.
  • the transmitter is an ultrasonic transmitter or an infrared emitter.
  • the transmitter adopts an ultrasonic transmitter or an infrared emitter
  • the principle is simple and stable in the actual working process.
  • the receiver is located in a four corner area of the touch panel.
  • the receiver is disposed in the four corner areas of the touch panel, which is convenient and simple in practical applications.
  • the receiver is an ultrasonic receiver or an infrared receiver.
  • the receiver uses an ultrasonic receiver or an infrared receiver
  • the principle is simple and stable during actual operation.
  • the embodiment of the invention further provides a driving method of a touch device, comprising:
  • the touch panel is configured to display content, refresh the displayed content according to the display scan signal, and can sense touch on the touch panel, and touch The controller cooperates to scan the touch;
  • the driving method further comprises:
  • the touch controller is controlled to start working.
  • the driving method of the touch device when there is a touch to the touch panel and no touch to the touch panel, the display scan signal output to the touch panel is different.
  • the touch controller does not work when there is no touch. Therefore, the driving method according to an embodiment of the present invention can enable the touch device to operate at a higher display refresh rate without a touch while reducing the power consumption of the touch device.
  • detecting whether an object is in contact with or close to the touch panel of the touch device includes:
  • FIG. 1 is a schematic diagram of a liquid crystal display structure using an in-cell touch technology
  • FIGS. 2(a) and 2(b) are schematic diagrams showing the operation timings of an external capacitive touch screen and a liquid crystal display using in-cell touch technology, respectively;
  • FIG. 3 is a system block diagram of a liquid crystal display using in-cell touch technology
  • FIG. 4 is a schematic diagram of a touch device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing the position of a transmitter and a receiver in a touch device according to an embodiment of the present invention
  • FIG. 6 is a flowchart showing the operation of a touch device according to an embodiment of the present invention.
  • FIG. 7 is a timing chart of operation of a touch panel when there is a touch and no touch according to an embodiment of the present invention.
  • FIG. 8 is a flow chart of a driving method according to an embodiment of the present invention.
  • the embodiment of the invention provides a touch device and a driving method, which can make the touch device work at a higher display refresh rate when there is no touch, and improve the display effect.
  • the touch device 400 includes a touch panel 40, a timing controller 41, a touch controller 42, a controller 43, and a sensor 44.
  • the touch panel 40 displays the content, refreshes the displayed content according to the display scan signal, and can sense the touch on the touch panel 40 to cooperate with the touch controller 42 to scan the touch.
  • the timing controller 41 is for outputting a display scan signal to the touch panel 40.
  • the touch controller 42 is configured to scan and position the touch on the touch panel 40.
  • the sensor 44 is configured to detect whether an object contacts or approaches the touch panel 40, and outputs a first indication signal to the controller 43 when no object contacts or approaches the touch panel 40; when an object contacts or approaches the touch panel 40, the output The second indication signal is to the controller 43.
  • the controller 43 controls the timing controller 41 to output a first display scan signal to the touch panel 40 when receiving the first indication signal from the sensor 44; and when receiving the second indication signal from the sensor 44, The control timing controller 41 outputs a second display scan signal to the touch panel 40.
  • the scanning frequency of the first display scan signal is higher than the scan frequency of the second display scan signal.
  • the controller 43 also controls the touch controller 42 to not operate when receiving the first indication signal, and controls the touch controller 42 to start working when receiving the second indication signal.
  • the first indication signal and the second indication signal output by the sensor 44 may be low level and high level signals, or may be digital signals.
  • the sensor 44 when no object contacts or approaches the touch panel 40, the sensor 44 outputs a high level signal, and the The signal is sent to the controller 43, which in turn controls the touch controller 42 to be inoperative, and controls the timing controller 41 to output a first display scan signal; when an object contacts or approaches the touch panel, the sensor 44 outputs The low level signal is sent to the controller 43, which in turn controls the timing controller 41 to output the second display scan signal and controls the touch controller 42 to start working, that is, to start the touch on the touch panel 40. Control scanning and positioning.
  • the controller 43 may be an integrated circuit directly disposed in the touch panel, or may be an integrated circuit disposed in a Flexible Printed Circuit (FPC), or may be disposed at other locations.
  • FPC Flexible Printed Circuit
  • the embodiment of the invention does not specifically limit the position it sets.
  • the sensor 44 in the embodiment of the present invention includes a transmitter 51 and a receiver 52.
  • FIG. 5 is a schematic diagram showing the position of a transmitter 51 and a receiver 52 in a touch device according to an embodiment of the present invention.
  • the emitter 51 is for emitting light waves or sound waves to the vicinity of the touch panel 40.
  • the receiver 52 is configured to receive the light wave or sound wave, and determine whether an object contacts or approaches the touch panel according to the change of the light wave or the sound wave.
  • the number of the transmitters 51 in the embodiment of the present invention is equal to the number of the receivers 52.
  • the number of the transmitters 51 is two, which are respectively located at the lower left corner and the lower right corner of the touch panel 40.
  • the transmitters may also be located at the upper left corner and the upper right corner of the touch panel 40, respectively.
  • the example does not specifically limit the number and location of the transmitter.
  • the transmitter in the embodiment of the invention is an ultrasonic transmitter or an infrared emitter.
  • the embodiment of the present invention does not specifically limit the type of the transmitter, and the transmitter may be other types of sensors, such as a laser transmitter or the like.
  • the number of the receivers 52 is two, which are respectively located in the upper left corner and the upper right corner of the touch panel 40.
  • the receivers may also be located in the lower left corner and the lower right corner of the touch panel 40 respectively.
  • the embodiment of the present invention does not specifically limit the number and location of the receivers.
  • the receiver in the embodiment of the present invention is an ultrasonic receiver or an infrared receiver.
  • the embodiment of the present invention does not specifically limit the type of the receiver.
  • the receiver may also be other types of sensors, such as a laser receiver.
  • the workflow of the touch device according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 6, first, the system performs initialization. After the initialization, the timing controller 41 outputs a first display scan signal scan to the touch panel 40, and the touch controller 42 does not operate.
  • the touch panel Under the control of the first display scan signal, the touch panel (for example, the liquid crystal display) operates at the normal display scan frequency; while the transmitter 51 located at the lower left and lower right corners of the touch panel 40 starts scanning to emit light waves or sound waves,
  • the transmitter 51 is an ultrasonic transmitter, an ultrasonic wave is emitted
  • the transmitter 51 is an infrared emitter, an infrared light wave is emitted
  • the receiver 52 located at the upper left and upper right corners of the touch panel 40 starts scanning, and the receiving transmitter 51 emits Light wave or sound wave, and according to the change of the light wave or sound wave, judging whether an object contacts or is close to the touch panel, when no object contacts or approaches the touch panel, the first indication signal is output to the controller 43;
  • a second indication signal is output to the controller 43.
  • the controller 43 controls the timing controller 41 to continue outputting the first display scan signal while controlling the touch controller 42 to not work.
  • the controller 43 controls the timing controller 41 to output the second display scan signal, and simultaneously controls the touch controller 42 to start working.
  • the display scan of the touch panel 40 and the touch scan are time-divisionally driven. The specific working method of the time-sharing driving is the same as the prior art, and will not be described here.
  • FIG. 7 is a timing chart of operation of a touch panel when there is a touch and no touch according to an embodiment of the present invention. As shown in FIG. 7, the operation timing of the touch device according to an embodiment of the present invention will be described by taking ultrasonic waves as an example.
  • the timing controller 41 When no object is in contact with or near the touch panel surface, the timing controller 41 outputs a first display scan signal that controls the touch panel to operate at a normal display scan frequency.
  • the display scanning frequency is 60 Hz, and the touch controller 42 does not work.
  • the ultrasonic wave emitted by the ultrasonic transmitter is disturbed.
  • the received ultrasonic wave is analyzed by the receiver to determine whether an object contacts or approaches the surface of the touch panel.
  • the controller 43 controls the touch controller 42 to start operation while the control timing controller 41 outputs the second display scan signal.
  • the display scan frequency of the touch panel is lowered at this time, thereby ensuring that the touch controller 42 has sufficient time for scanning.
  • the display scanning frequency is 40 Hz
  • the touch scanning frequency is 40 Hz.
  • the controller 43 controls the touch controller 42 to stop working, while the control timing controller 41 outputs the first display scan signal, and the touch panel operates at the normal display scan frequency.
  • the scanning frequency is shown to be 60 Hz.
  • FIG. 8 is a diagram showing a driving method according to an embodiment of the present invention, the method comprising:
  • the specific embodiment of the present invention is added to a touch device using an in-cell touch technology.
  • the sensor and the controller are used to enable the touch scan of the touch device using the in-cell touch technology to work only when the touch occurs, thereby solving the time-division of the display scan and the touch scan of the touch device using the in-cell touch technology.
  • the contradiction is made so that the touch device can work at a higher display refresh rate when there is no touch.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
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  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Position Input By Displaying (AREA)

Abstract

本发明公开了一种触摸装置及驱动方法，能够使得触摸装置在无触摸时工作在较高的显示刷新率。所述触摸装置包括触摸面板、时序控制器、触控控制器、控制器和感测器，其中：感测器用于检测是否有物体接触或靠近触摸面板，当没有物体接触或靠近触摸面板时，输出第一指示信号到控制器；当有物体接触或靠近触摸面板时，输出第二指示信号到控制器；控制器用于在接收到第一指示信号时，控制时序控制器输出第一显示扫描信号；并在接收到第二指示信号时，控制时序控制器输出第二显示扫描信号；第一显示扫描信号的扫描频率高于第二显示扫描信号的扫描频率。

Description

触摸装置及驱动方法
相关申请的交叉引用
本申请要求于2014年6月11日向中国提交的发明名称“一种触摸装置及触摸驱动方法”的专利申请201410258784.8的优先权，将其通过引用的方式全文合并在此。
技术领域
本发明涉及显示器技术领域，尤其涉及一种触摸装置及驱动方法。
背景技术
采用内嵌式(in-cell)触摸技术的电容触摸屏相较外挂式电容触摸屏结构，可以省去一张触摸基板，将整个显示模组制作得更轻薄。采用in-cell触摸技术的液晶显示屏结构示意图如图1所示，将触控驱动电极(Tx)和触控感应电极(Rx)制作在液晶显示面板的阵列基板侧的玻璃基板上，其中，Tx线与公共电极(Vcom)线共用。采用in-cell触摸技术的液晶显示屏(即电容触摸屏)的Tx和Rx会与薄膜晶体管(Thin Film Transistor，TFT)显示器件之间产生各种寄生电容和耦合电容，图中的Gatel、Gate2、Gate n表示每一行像素的栅极扫描线，Datal、Data2、Data n表示每一列像素的数据扫描线，CLC表示液晶显示面板之间的电容，Cs表示存储电容。
图2(a)示出了外挂式电容触摸屏的显示扫描和触控扫描的时序的示例，其中a1-a60表示显示扫描时段，t1-t60表示触控扫描时段。如图2(a)所示，外挂式电容触摸屏因不受TFT驱动信号影响，触控扫描是与画面刷新同步进行的，即电容触摸屏的显示扫描与触控扫描是同步进行的，彼此互不影响。如图所示，显示扫描的扫描频率为60HZ，触控扫描的扫描频率为100HZ。图2(b) 示出了采用in-cell触摸技术的液晶显示屏的显示扫描和触控扫描的时序的示例，其中a1-a60表示显示扫描时段，t1-t60表示触控扫描时段。如图2(b)所示，in-cell触摸技术采用的扫描方式是在两帧画面之间的空白区间进行，即液晶显示屏的显示扫描和触控扫描需要分时进行。如图所示，显示扫描的扫描频率为40HZ，触控扫描的扫描频率为40HZ。
采用in-cell触摸技术的液晶显示屏的系统方块图如图3所示，受时序控制器和驱动器数据传输速率及子像素充电时间的限制，每一帧分配的触控扫描时间t是有限的。当t较小时，将无法完成Tx和Rx的扫描，因此需要适当的增大t，目前增大t直接的方式就是增大一帧的扫描时间，相应地所分配的触控扫描时间也增大，但这意味着降低帧率，会影响画面显示效果，出现闪烁和拖影等问题。
综上所述，采用in-cell触摸技术的液晶显示屏由于采用分时驱动的驱动方法，液晶显示屏在没有触摸时无法工作在较高的显示刷新率。
发明内容
本发明实施例提供了一种触摸装置及驱动方法，能够使得触摸装置在没有触摸时工作在较高的显示刷新率，改善显示效果。
本发明实施例提供了一种触摸装置，包括：触摸面板，用于显示内容，按照显示扫描信号来刷新所显示的内容，并能够感应所述触摸面板上的触控，与触控控制器协作以对所述触控进行扫描；时序控制器，被配置用于向所述触摸面板输出显示扫描信号，所述触控控制器，被配置用于对触摸面板上的触控进行扫描并定位；感测器，被配置用于检测是否有物体接触或靠近所述触摸面板，当没有物体接触或靠近所述触摸面板时，输出第一指示信号；当有物体接触或靠近所述触摸面板时，输出第二指示信号；以及控制器，被配置用于在接收到所述第一指示信号时，控制所述时序控制器输出第一显示扫描信号；并在接收到所述第二指示信号时，控制所述时序控制器输出第二显示扫描信号；其中， 所述第一显示扫描信号的扫描频率高于所述第二显示扫描信号的扫描频率。
根据本发明的实施例，所述控制器还被配置为：
在接收到所述第一指示信号时，控制所述触控控制器不工作；以及
在接收到所述第二指示信号时，控制所述触控控制器开始工作
根据本发明实施例的触摸装置，在有对触摸面板的触摸和没有对触摸面板的触摸时，时序控制器输出的显示扫描信号不同。此外，在没有触摸时使触控控制器不工作。因此，本发明实施例提供的触摸装置能够在没有触摸时工作在较高的显示刷新率，改善显示效果，同时能够降低功耗。
根据本发明的实施例，所述感测器包括发射器和接收器，其中：
所述发射器用于向所述触摸面板的附近发出光波或声波；
所述接收器用于接收所述光波或声波，并根据该光波或声波的变化，判断是否有物体接触或靠近所述触摸面板。
这样，当感测器包括发射器和接收器时，在实际应用中能够更加方便、简单的检测是否有物体接触或靠近所述触摸面板。
根据本发明的实施例，所述发射器的个数与所述接收器的个数相等。
这样，将发射器的个数与所述接收器的个数设置为相等，在实际应用中方便、简单。
根据本发明的实施例，所述发射器位于所述触摸面板的四角区域。
这样，将发射器设置在触摸面板的四角区域，在实际应用中方便、简单。
根据本发明的实施例，所述发射器的个数为两个。
这样，将发射器的个数设置为两个，在实际应用中方便、简单且节约生成成本。
根据本发明的实施例，所述发射器为超声波发射器或红外发射器。
这样，发射器采用超声波发射器或红外发射器时，在实际工作过程中，原理简单且稳定。
根据本发明的实施例，所述接收器位于所述触摸面板的四角区域。
这样，将接收器设置在触摸面板的四角区域，在实际应用中方便、简单。
根据本发明的实施例，所述接收器为超声波接收器或红外接收器。
这样，接收器采用超声波接收器或红外接收器时，在实际工作过程中，原理简单且稳定。
本发明实施例还提供了一种触摸装置的驱动方法，包括：
检测是否有物体接触或靠近所述触摸装置的触摸面板，所述触摸面板用于显示内容，按照显示扫描信号来刷新所显示的内容，并能够感应所述触摸面板上的触控，与触控控制器协作以对所述触控进行扫描；
如果有物体接触或靠近所述触摸面板，向所述触摸面板输出第二显示扫描信号；以及
如果没有物体接触或靠近所述触摸面板，向所述触摸面板输出第一显示扫描信号；其中，所述第一显示扫描信号的扫描频率高于所述第二显示扫描信号的扫描频率。
根据本发明的实施例，所述驱动方法还包括：
在接收到所述第一指示信号时，控制所述触控控制器不工作；以及
在接收到所述第二指示信号时，控制所述触控控制器开始工作。
根据本发明实施例的触摸装置的驱动方法，有对触摸面板的触摸和没有对触摸面板的触摸时，向触摸面板输出的显示扫描信号不同。此外，在没有触摸时触控控制器不工作。因此，根据本发明实施例的驱动方法能够使得触摸装置在没有触摸时工作在较高的显示刷新率，同时能够降低触摸装置的功耗。
根据本发明的实施例，检测是否有物体接触或靠近所述触摸装置的触摸面板包括：
向所述触摸面板的附近发出光波或声波；
接收所述光波或声波，并根据该光波或声波的变化，判断是否有物体接触或靠近所述触摸面板。
这样，采用光波或声波，在实际应用中能够更加方便、简单的检测是否有 物体接触或靠近所述触摸面板。
附图说明
图1为采用in-cell触摸技术的液晶显示屏结构的示意图；
图2(a)和图2(b)分别为外挂式电容触摸屏和采用in-cell触摸技术的液晶显示屏的工作时序的示意图；
图3为采用in-cell触摸技术的液晶显示屏的系统方块图；
图4为根据本发明实施例的触摸装置的示意图；
图5为根据本发明实施例的触摸装置中的发射器和接收器的位置示意图；
图6为根据本发明实施例的触摸装置的工作流程图；
图7为根据本发明实施例的触摸面板在有触摸和无触摸时的工作时序图；
图8为根据本发明实施例的驱动方法的流程图。
具体实施方式
本发明实施例提供了一种触摸装置及驱动方法，能够使得触摸装置在没有触摸时工作在较高的显示刷新率，改善显示效果。
下面结合附图详细介绍根据本发明实施例的触摸装置及其的工作过程。
图4为根据本发明实施例的触摸装置400的示意图。如图4所示，根据本发明实施例的触摸装置400包括触摸面板40、时序控制器41、触控控制器42、控制器43和感测器44。触摸面板40显示内容，按照显示扫描信号来刷新所显示的内容，并能够感应触摸面板40上的触控，与触控控制器42协作以对所述触控进行扫描。时序控制器41用于向触摸面板40输出显示扫描信号。触控控制器42用于对触摸面板40上的触控进行扫描并定位。
感测器44用于检测是否有物体接触或靠近触摸面板40，当没有物体接触或靠近触摸面板40时，输出第一指示信号到控制器43；当有物体接触或靠近触摸面板40时，输出第二指示信号到控制器43。
控制器43在从感测器44接收到第一指示信号时，控制所述时序控制器41向触摸面板40输出第一显示扫描信号；并在从感测器44接收到第二指示信号时，控制时序控制器41向触摸面板40输出第二显示扫描信号。
第一显示扫描信号的扫描频率高于第二显示扫描信号的扫描频率。
控制器43在接收到第一指示信号时，还控制触控控制器42不工作，而在接收到第二指示信号时，控制触控控制器42开始工作。
其中，感测器44输出的第一指示信号和第二指示信号可以是低电平和高电平信号，也可以是数字信号。
具体地，以第一指示信号为高电平信号，第二指示信号为低电平信号为例，当没有物体接触或靠近触摸面板40时，感测器44输出高电平信号，并将该信号发送给控制器43，控制器43继而控制触控控制器42不工作，并控制时序控制器41输出第一显示扫描信号；当有物体接触或靠近所述触摸面板时，感测器44输出低电平信号，并将该信号发送给控制器43，控制器43继而控制时序控制器41输出第二显示扫描信号，并控制触控控制器42开始工作，即开始对触摸面板40上的触控进行扫描和定位。
具体地，控制器43可以为直接设置在触摸面板中的集成电路，或者也可以为设置在柔性电路板(Flexible Printed Circuit，FPC)中的集成电路，当然也可以将其设置在其它位置，本发明实施例并不对其设置的位置作具体限定。
本发明实施例中的感测器44包括发射器51和接收器52。图5为根据本发明实施例的触摸装置中的发射器51和接收器52的位置示意图。
发射器51用于向触摸面板40的附近发出光波或声波。
接收器52用于接收所述光波或声波，并根据该光波或声波的变化，判断是否有物体接触或靠近所述触摸面板。
具体地，本发明实施例中的发射器51的个数与接收器52的个数相等。本发明实施例中发射器51的个数为两个，分别位于触摸面板40的左下角和右下角。当然发射器也可以分别位于触摸面板40的左上角和右上角，本发明实施 例并不对发射器的个数和位置做具体限定。本发明实施例中的发射器为超声波发射器或红外发射器。同样的，本发明实施例也不对发射器的种类做具体限定，发射器还可以是其它类型的感测器，如激光发射器等。本发明实施例中接收器52的个数为两个，分别位于触摸面板40的左上角和右上角。当然接收器也可以分别位于触摸面板40的左下角和右下角，本发明实施例并不对接收器的个数和位置做具体限定。本发明实施例中的接收器为超声波接收器或红外接收器。同样的，本发明实施例也不对接收器的种类做具体限定，接收器还可以是其它类型的感测器，如激光接收器等。
具体地，结合图6，描述根据本发明实施例的触摸装置的工作流程。如图6所示，首先系统进行初始化，初始化后时序控制器41向触摸面板40输出第一显示扫描信号扫描，触控控制器42不工作。在第一显示扫描信号的控制下，触摸面板(例如，液晶显示屏)按正常的显示扫描频率工作；同时位于触摸面板40的左下角和右下角的发射器51开始扫描，发出光波或声波，当发射器51为超声波发射器时，发出超声波，当发射器51为红外发射器时，发出红外光波，同时位于触摸面板40的左上角和右上角的接收器52开始扫描，接收发射器51发出的光波或声波，并根据该光波或声波的变化，判断是否有物体接触或靠近所述触摸面板，当没有物体接触或靠近所述触摸面板时，输出第一指示信号到控制器43；当有物体接触或靠近所述触摸面板时，输出第二指示信号到控制器43。当接收到的光波或声波没有发生变化即认为没有物体接触或靠近所述触摸面板，此时，控制器43控制时序控制器41继续输出第一显示扫描信号，同时控制触控控制器42不工作；当接收到的光波或声波发生变化即认为有物体接触或靠近所述触摸面板，此时，控制器43控制时序控制器41输出第二显示扫描信号，同时控制触控控制器42开始工作，此时触摸面板40的显示扫描与触控扫描分时驱动。分时驱动的具体工作方法与现有技术相同，在此不予赘述。
具体地，在本发明实施例中，当有物体接触或靠近所述触摸面板时，均认 为该触摸面板存在触摸。相应地，发射器51所发出的光波或声波也用于感应对触摸面板的接触或靠近。在本文所述的“触摸面板的附近”即指所发出的光波或声波可以感应的范围，可以根据需要而设定。图7为根据本发明实施例的触摸面板在有触摸和无触摸时的工作时序。如图7所示，以采用超声波为例，说明根据本发明实施例的触摸装置的工作时序。当没有物体接触或靠近触摸面板表面时，时序控制器41输出第一显示扫描信号，控制触摸面板按正常的显示扫描频率工作。例如，本发明具体实施例中显示扫描频率为60HZ，此时触控控制器42不工作。当有物体接触或靠近触摸面板表面时，超声波发射器发出的超声波会受到干扰，此时通过接收器对接收到的超声波进行分析，判断出有物体接触或靠近触摸面板表面。当接收器判断有物体接触或靠近触摸面板表面时，控制器43控制触控控制器42开始工作，同时控制时序控制器41输出第二显示扫描信号。由于根据本发明实施例的第一显示扫描信号的扫描频率高于第二显示扫描信号的扫描频率，故此时触摸面板的显示扫描频率降低，这样能够确保触控控制器42有足够的时间进行扫描，从而实现触摸面板的显示扫描与触控扫描的分时驱动，如本发明具体实施例中显示扫描频率为40HZ，触控扫描频率为40HZ。当接收器判断无物体接触或靠近触摸面板表面时，控制器43控制触控控制器42停止工作，同时控制时序控制器41输出第一显示扫描信号，此时触摸面板按正常的显示扫描频率工作。例如，本发明具体实施例中显示扫描频率为60HZ。
图8为根据本发明实施例的驱动方法，该方法包括：
S801、检测是否有物体接触或靠近触摸面板；
S802、当有物体接触或靠近所述触摸面板时，向触摸面板输出第二显示扫描信号；当没有物体接触或靠近触摸面板时，向触摸面板输出第一显示扫描信号；其中，所述第一显示扫描信号的扫描频率高于所述第二显示扫描信号的扫描频率。
综上所述，本发明具体实施例通过在采用in-cell触摸技术的触摸装置上添 加感测器和控制器，使得采用in-cell触摸技术的触摸装置的触控扫描仅在触摸发生时工作，从而解决采用in-cell触摸技术的触摸装置的显示扫描和触控扫描需分时进行的矛盾，使触摸装置在无触摸时可以工作在较高的显示刷新率。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (12)

  1. 一种触摸装置，包括：
    触摸面板，用于显示内容，按照显示扫描信号来刷新所显示的内容，并能够感应所述触摸面板上的触控，与触控控制器协作以对所述触控进行扫描；
    时序控制器，被配置用于向所述触摸面板输出显示扫描信号；
    所述触控控制器，被配置用于对触摸面板上的触控进行扫描和定位，
    感测器，被配置用于检测是否有物体接触或靠近所述触摸面板，当没有物体接触或靠近所述触摸面板时，输出第一指示信号；当有物体接触或靠近所述触摸面板时，输出第二指示信号；以及
    控制器，被配置用于在接收到所述第一指示信号时，控制所述时序控制器输出第一显示扫描信号；并在接收到所述第二指示信号时，控制所述时序控制器输出第二显示扫描信号；
    其中，所述第一显示扫描信号的扫描频率高于所述第二显示扫描信号的扫描频率。
  2. 根据权利要求1所述的触摸装置，其中，所述控制器还被配置为：
    在接收到所述第一指示信号时，控制所述触控控制器不工作；以及
    在接收到所述第二指示信号时，控制所述触控控制器开始工作。
  3. 根据权利要求1所述的触摸装置，其中，所述感测器包括发射器和接收器，其中：
    所述发射器用于向所述触摸面板的附近发出光波或声波；
    所述接收器用于接收所述光波或声波，并根据该光波或声波的变化，判断是否有物体接触或靠近所述触摸面板。
  4. 根据权利要求3所述的触摸装置，其中，所述发射器的个数与所述接收器的个数相等。
  5. 根据权利要求4所述的触摸装置，其中，所述发射器位于所述触摸面 板的四角区域。
  6. 根据权利要求5所述的触摸装置，其中，所述发射器的个数为两个。
  7. 根据权利要求6所述的触摸装置，其中，所述发射器为超声波发射器或红外发射器。
  8. 根据权利要求4所述的触摸装置，其中，所述接收器位于所述触摸面板的四角区域。
  9. 根据权利要求8所述的触摸装置，其中，所述接收器为超声波接收器或红外接收器。
  10. 一种触摸装置的驱动方法，包括：
    检测是否有物体接触或靠近所述触摸装置的触摸面板，所述触摸面板用于显示内容，按照显示扫描信号来刷新所显示的内容，并能够感应所述触摸面板上的触控，与触控控制器协作以对所述触控进行扫描；
    如果有物体接触或靠近所述触摸面板，向所述触摸面板输出第二显示扫描信号；以及
    如果没有物体接触或靠近所述触摸面板，向所述触摸面板输出第一显示扫描信号；
    其中，所述第一显示扫描信号的扫描频率高于所述第二显示扫描信号的扫描频率。
  11. 根据权利要求10所述的驱动方法，还包括：
    在接收到所述第一指示信号时，控制所述触控控制器不工作；以及
    在接收到所述第二指示信号时，控制所述触控控制器开始工作。
  12. 根据权利要求10所述的驱动方法，其中，检测是否有物体接触或靠近所述触摸装置的触摸面板包括：
    向所述触摸面板的附近发出光波或声波；
    接收所述光波或声波，并根据该光波或声波的变化，判断是否有物体接触或靠近所述触摸面板。
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