WO2016145915A1 - 一种具有触控功能的显示基板及其驱动方法、显示装置 - Google Patents
一种具有触控功能的显示基板及其驱动方法、显示装置 Download PDFInfo
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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Definitions
- the present disclosure relates to the field of display technologies, and in particular, to a display substrate having a touch function, a driving method thereof, and a display device.
- the touch screen can be divided into a resistive touch screen, a self-capacitive touch screen, and a mutual capacitive touch screen.
- the mutual capacitive touch screen has the advantages of high sensitivity and multi-touch, and the application is more and more extensive.
- the mutual capacitive touch screen includes a touch driving electrode and a touch sensing electrode that are insulated from each other.
- a mutual capacitance is formed between the touch driving electrode and the touch sensing electrode.
- the size of the mutual capacitance is changed, so that the signal on the touch sensing electrode changes.
- the mutual capacitive touch screen is embedded in the liquid crystal display device, that is, the touch driving electrode and the touch sensing electrode are both located in the liquid crystal display device. internal.
- the inventors have found that when a mutual capacitive touch screen is embedded in a liquid crystal display device, the size of the mutual capacitance is affected by the deflection of the liquid crystal molecules, that is, when the liquid crystal molecules at a certain position are deflected, the touch driving electrodes and the touch sensing electrodes The dielectric constant between the dielectric changes, and the size of the mutual capacitance also changes, which causes the signal on the touch sensing electrode to change.
- the deflection of the liquid crystal molecules is uncertain, and the difference caused by the two factors of the finger touching the touch screen and the deflection of the liquid crystal molecules cannot be judged. Therefore, it is easy to accurately detect the position where the finger touches.
- the technical problem to be solved by the present disclosure is to provide a display substrate with a touch function, a driving method thereof, and a display device, which can avoid the influence of liquid crystal molecular deflection on mutual capacitance and improve the accuracy of touch.
- the embodiment of the present disclosure provides a driving method of a display substrate with a touch function, and adopts the following technical solutions:
- a driving method of a display substrate with a touch function comprising:
- N is a positive integer greater than or equal to 2;
- n is a positive integer greater than or equal to 1 and less than or equal to N.
- the touch period of the nth portion coincides with the display scan period of at least one other portion.
- the display scan period of the nth portion coincides with the touch period of the n+1th portion; the display scan period of the Nth portion coincides with the touch period of the first portion.
- the resetting the pixel corresponding to the nth portion includes:
- the same voltage is written to the pixel corresponding to the nth portion.
- the turning on the gate line for controlling the pixel corresponding to the nth portion includes:
- a reset on signal is input, and the reset on signal is used to control the gate line of the pixel corresponding to the nth portion to be turned on.
- the voltage is a voltage that is experimentally determined to have the least influence on the display effect of the display device including the display substrate.
- the voltage is a voltage that causes the gray level of the pixel corresponding to the nth portion to be 0.
- the pixels corresponding to the first part to the Nth part are reset, so that the pixels have the same gray level, the first part to the Nth The parts start to touch at the same time.
- the nth portion is a portion of the touch driving electrode and the touch sensing electrode, and only the pixel corresponding to the nth portion is reset.
- the touch driving signal is applied to the touch driving electrode included in the nth portion; in the display scanning period of the nth portion, to the nth
- the portion of the touch drive electrode included includes a common electrode signal.
- Embodiments of the present disclosure provide a driving method of a display substrate with a touch function, the driving The method comprises dividing the touch driving electrode included in the display substrate parallel to the gate line into N parts, all parts are sequentially arranged in a direction perpendicular to the gate line, wherein N is a positive integer greater than or equal to 2; in the nth part Before the touch starts, reset the pixels corresponding to the nth portion, so that the pixels have the same gray level, where n is a positive integer greater than or equal to 1 and less than or equal to N.
- the embodiment of the present disclosure further provides a display substrate with a touch function, comprising a plurality of rows of touch driving electrodes extending in a direction parallel to the gate lines, wherein the touch driving electrodes are divided into N parts, all of which are vertical Arranging sequentially in the direction of the gate line, wherein N is a positive integer greater than or equal to 2; each portion of the touch driving electrode is connected to a driving line, and the nth portion before the start of the nth partial touch
- the partially corresponding pixels can be reset and have the same gray scale, wherein n is a positive integer greater than or equal to 1 and less than or equal to N, such that the deflection states of all liquid crystal molecules corresponding to the nth portion are the same; in the nth portion During the touch period, the touch driving signal is applied to the touch driving electrode of the nth portion; and the common driving signal is applied to the touch driving electrode of the nth portion during the display scanning period of the nth portion .
- the display substrate further includes a gate line, a data line, a thin film transistor, and a pixel electrode, wherein the pixel electrode has a slit or a strip electrode, and the touch driving electrode is insulated from above the pixel electrode.
- the display substrate further includes a shielding structure covering the data line and disposed in the same layer as the pixel electrode.
- An embodiment of the present disclosure provides a display substrate having a touch function
- the display substrate includes a plurality of rows of touch drive electrodes extending in a direction parallel to the gate lines, and the touch drive electrodes are divided into N portions, all of which are vertical Arranging sequentially in the direction of the gate line, wherein N is a positive integer greater than or equal to 2; each portion includes a touch driving electrode connected to a driving line, so that before the nth portion touch starts, the first n pixels corresponding to the pixels, so that the pixels have the same gray level, wherein n is a positive integer greater than or equal to 1 and less than or equal to N, so that the deflection states of all liquid crystal molecules corresponding to the nth portion are the same, thereby avoiding The influence of liquid crystal molecular deflection on the mutual capacitance between the touch driving electrode and the touch sensing electrode improves the accuracy of the touch.
- an embodiment of the present disclosure further provides a touch display device, where the touch display device includes A display substrate with a touch function as described in any of the above.
- the display device further includes a reset on signal input module, and the reset on signal input module is configured to input a reset on signal to the nth portion before the nth partial touch starts, the reset on signal
- the pixels corresponding to the nth portion are reset so that the pixels have the same gray level, where n is a positive integer greater than or equal to 1 and less than or equal to N.
- FIG. 1 is a schematic diagram of a driving method in an embodiment of the present disclosure
- FIG. 2 is a timing diagram of a driving method in an embodiment of the present disclosure
- FIG. 3 is a schematic plan view of a display substrate in an embodiment of the present disclosure.
- FIG. 4 is a schematic cross-sectional view of a display substrate in an embodiment of the present disclosure.
- the embodiment of the present disclosure provides a driving method for a display substrate (hereinafter referred to as a display substrate) having a touch function, which can avoid the influence of liquid crystal molecular deflection on mutual capacitance and improve the accuracy of touch.
- the driving method includes:
- the touch driving driving electrode included in the display substrate parallel to the gate line is divided into N parts, and all the parts are sequentially arranged in a direction perpendicular to the gate line, wherein N is a positive integer greater than or equal to 2; and the nth part is touched
- N is a positive integer greater than or equal to 2
- the nth part is touched
- reset the pixels corresponding to the nth portion so that the pixels have the same gray level, where n is a positive integer greater than or equal to 1 and less than or equal to N, so that during the touch period of the nth portion,
- the deflection states of all the liquid crystal molecules corresponding to the nth portion are the same, thereby avoiding the influence of the deflection of the liquid crystal molecules on the mutual capacitance between the touch driving electrode and the touch sensing electrode, and improving the accuracy of the touch.
- the time for resetting the pixel corresponding to the nth portion is short, exemplarily 4 ms. Therefore, the reset of the pixel corresponding
- N may be determined according to a plurality of factors such as the size and resolution of the display substrate. Illustratively, the value of N above may be 12.
- the touch period of the nth portion in the embodiment of the present disclosure coincides with the display scan period of at least one other portion, so that compared with the manner in which the touch and display are separated in time in the prior art, The touch time of the entire display substrate can be greatly increased, and the sensitivity of the touch can be improved.
- the pixel needs to be reset before the touch starts, and the reset needs to occupy a certain time, but the reset time does not necessarily lead to a time extension of one frame.
- the display scan period of the nth portion coincides with the touch period of the n+1th portion, and the display scan period and the first portion of the Nth portion
- the touch time periods coincide, so that after the touch time period of each part ends, the display scan time period is immediately entered.
- the pixels corresponding to each part are converted from the gray scale of the reset to the gray scale of the display, so that the pixels corresponding to each part can be prevented from being in the gray scale of the reset for a long time, and the display effect of the display device is avoided.
- the embodiment of the present disclosure further provides a specific method for resetting pixels corresponding to the nth portion, the method includes:
- Step S1 Turn on a gate line for controlling pixels corresponding to the nth portion.
- each pixel includes a pixel unit, and the pixel unit includes a thin film transistor and a pixel electrode, wherein a gate of the thin film transistor is connected to the gate line, a source is connected to the data line, a drain is connected to the pixel electrode, and after the gate line is turned on, the gate line is The connected gate-controlled thin film transistor is turned on, and the source and the drain are turned on, so that the signal input on the data line can be transmitted to the pixel electrode, so that the gate line can be used to control the pixel.
- turning on the gate line for controlling the pixel corresponding to the nth portion includes: inputting a reset on signal, and the reset on signal is used to control the gate line of the pixel corresponding to the nth portion to be turned on.
- the reset enable signal can be controlled by controlling the shift register of the above-described gate line connection, so that the shift register sequentially outputs a signal capable of turning on the gate line, thereby causing the gate line for controlling the pixel corresponding to the nth portion. Turn it on in turn.
- the reset enable signal may be output by the reset enable signal input module included in the display device.
- step S2 the same voltage is written to the pixel corresponding to the nth portion.
- the gate-controlled thin film transistor of the gate line is turned on, and the source and the drain are turned on, so that the signal input on the data line can be transmitted to the pixel.
- the signals input on the data lines are the same on the electrodes, the same voltage can be written to the pixels corresponding to the nth portion.
- the embodiment of the present disclosure provides two options: the first option, the embodiment of the present disclosure.
- the voltage is selected to be experimentally determined, and the voltage that affects the display effect of the display device including the display substrate is minimized, so that the effect of the reset on the display effect is minimized; the second selection mode, the embodiment of the present disclosure selects the voltage as the first
- the gray level of the pixel corresponding to the n parts is a voltage of 0, so that the driving method is simple, and for the display device of the ADS display mode, when the gray level of the pixel is 0, the liquid crystal molecules have an initial orientation, and the liquid crystal molecules are deflected.
- the state consistency is good, so that the influence of liquid crystal molecular deflection on the touch accuracy can be avoided to the utmost extent.
- an embodiment of the present disclosure provides a specific driving method, where the driving method includes:
- the pixel corresponding to the first part is reset first (the picture is abbreviated as 1 reset), then the touch of the first part (abbreviated as 1 touch in the figure) and the 12th Part of the display scan (abbreviated as 12 in the figure) is performed simultaneously; then, the pixel corresponding to the second part is reset (the picture is abbreviated as 2 reset), and then the touch of the second part (the abbreviation in the figure is 2 touch) and the first part of the display scan (abbreviated as 1 display) at the same time; and so on, the corresponding pixel of the 12th part is reset (abbreviated as 12 reset in the figure), then, the 12th The touch of the part (abbreviated as 12 touches in the figure) and the display scan of the eleventh part (abbreviated as 11 in the figure) are simultaneously performed.
- the pixels corresponding to the second portion are reset during the t1 period.
- the reset ON signal EN is at a high level, so that the signals G21-G2i for controlling the gate lines of the pixels corresponding to the second portion are sequentially at a high level, wherein i is used to control the second portion.
- the number of gate lines of the corresponding pixel is the number of gate lines of the corresponding pixel.
- the gate lines are sequentially turned on, and the data signal Source outputted on the data line is a voltage at which the gray level of the pixel corresponding to the second portion is 0 (for example, the data signal Source outputted on the data line is a ground signal, referred to as GND), thereby realizing Reset of the pixel corresponding to the second part.
- the touch of the second portion and the display scan of the first portion are simultaneously performed. Specifically, while the touch driving signal TX output is input to the touch driving electrodes in the second portion, the signals G11-G1j for controlling the gate lines of the pixels corresponding to the first portion are sequentially high.
- j is a number of gate lines for controlling pixels corresponding to the first portion, and a data signal Source outputted on the data line is a displayed voltage, thereby implementing touch and the second portion
- j is a number of gate lines for controlling pixels corresponding to the first portion
- a data signal Source outputted on the data line is a displayed voltage
- the driving method in the embodiment of the present disclosure may further include: resetting the pixels corresponding to the first part to the Nth part after the scanning of the first part to the Nth part is completed, so that the pixels have the same gray level, One part to the Nth part start touching at the same time. At this time, the driving method of the display substrate can be simplified.
- the common electrode as the touch driving electrode in the embodiment of the present disclosure.
- the touch driving signal TX output is applied to the touch driving electrodes included in the nth portion; in the display scanning period of the nth portion, to the nth The partially included touch drive electrodes apply a common electrode signal.
- Embodiments of the present disclosure provide a driving method of a display substrate having a touch function.
- the driving method includes dividing the touch driving electrodes included in the display substrate parallel to the gate lines into N portions, all of which are sequentially arranged in a direction perpendicular to the gate lines, wherein N is a positive integer greater than or equal to 2; Before the partial touch starts, the pixels corresponding to the nth portion are reset so that the pixels have the same gray level, where n is a positive integer greater than or equal to 1 and less than or equal to N, and at this time, all the nth portions correspond to The deflection state of the liquid crystal molecules is the same, thereby avoiding the influence of the deflection of the liquid crystal molecules on the mutual capacitance between the touch driving electrode and the touch sensing electrode, and improving the accuracy of the touch.
- the embodiment of the present disclosure further provides a display substrate (hereinafter referred to as a display substrate) having a touch function driven by the driving method described in the first embodiment.
- the display substrate includes multiple rows.
- the touch driving electrode 1 is divided into N parts along the direction parallel to the gate line, and all the parts are sequentially arranged in a direction perpendicular to the gate line, wherein N is a positive integer greater than or equal to 2;
- the touch driving electrode 1 includes a driving line 2, so that the pixel corresponding to the nth portion can be reset before the nth partial touch starts, so that the pixels have the same gray level, wherein n is A positive integer greater than or equal to 1 and less than or equal to N, so that the deflection states of all the liquid crystal molecules corresponding to the nth portion are the same, thereby avoiding mutual capacitance between the liquid crystal molecules and the touch driving electrode 1 and the touch sensing electrode 3
- the impact of the touch improves the accuracy of the touch.
- the common electrode as the touch driving electrode 1 in the embodiment of the present disclosure.
- the touch driving signal TX output is applied to the touch driving electrode included in the nth portion; the display in the nth portion A common electrode signal is applied to the touch drive electrodes included in the nth portion during the scan period.
- the touch sensing electrode 3 in FIG. 3 is to explain the plane cross relationship between the touch driving electrode 1 and the touch sensing electrode 3, instead of being used to describe the embodiment of the present disclosure.
- the display substrate must include the touch sensing electrode 3.
- the touch sensing electrode 3 may be located on the display substrate or on another display substrate of the display substrate pair. The embodiment of the present disclosure does not limit this.
- the display substrate further includes a gate line, a data line, a thin film transistor, and a pixel electrode.
- the pixel electrode 4 is a plate electrode
- the touch driving electrode 1 is insulated from the pixel electrode 4, and the touch driving is performed.
- the electrode 1 is reused as a common electrode.
- the display substrate can be applied to a display device of the ADS display mode.
- the display substrate further includes a shielding structure 5 covering the data line 6 and disposed in the same layer as the pixel electrode 4, so as to shield the data line 6 and the touch driving electrode 1 Signal interference between.
- An embodiment of the present disclosure provides a display substrate having a touch function
- the display substrate includes a plurality of rows of touch drive electrodes extending in a direction parallel to the gate lines, and the touch drive electrodes are divided into N portions, all of which are vertical Arranging sequentially in the direction of the gate line, wherein N is a positive integer greater than or equal to 2; each portion includes a touch driving electrode connected to a driving line, so that before the nth portion touch starts, the first n pixels corresponding to the pixels, so that the pixels have the same gray level, wherein n is a positive integer greater than or equal to 1 and less than or equal to N, so that the deflection states of all liquid crystal molecules corresponding to the nth portion are the same, thereby avoiding The influence of liquid crystal molecular deflection on the mutual capacitance between the touch driving electrode and the touch sensing electrode improves the accuracy of the touch.
- the embodiment of the present disclosure further provides a touch display device, which includes the display substrate with a touch function according to any of the above.
- the display device further includes a reset on signal input module, and the reset on signal input module is configured to input a reset on signal to the nth portion before the nth partial touch start, and reset the on signal to make the nth portion correspond to
- the pixels are reset so that the pixels have the same gray level, where n is a positive integer greater than or equal to 1 and less than or equal to N.
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Abstract
Description
Claims (15)
- 一种具有触控功能的显示基板的驱动方法,包括:将所述显示基板包括的与栅线平行的触控驱动电极分为N个部分,所有部分沿垂直于所述栅线的方向依次设置,其中,N为大于等于2的正整数;在第n个部分触控开始之前,复位第n个部分对应的像素,以使所述像素具有相同的灰阶,其中,n为大于等于1且小于等于N的正整数。
- 根据权利要求1所述的驱动方法,其中,第n个部分的触控时间段和至少一个其他部分的显示扫描时间段重合。
- 根据权利要求2所述的驱动方法,其中,第n个部分的显示扫描时间段和第n+1个部分的触控时间段重合;第N个部分的显示扫描时间段和第1个部分的触控时间段重合。
- 根据权利要求1-3任一项所述的驱动方法,其中,所述复位所述第n个部分对应的像素,包括:开启用于控制第n个部分对应的像素的栅线;向第n个部分对应的像素写入相同的电压。
- 根据权利要求4所述的驱动方法,其中,所述开启用于控制第n个部分对应的像素的栅线,包括:输入复位开启信号,所述复位开启信号使用于控制第n个部分对应的像素的栅线开启。
- 根据权利要求4所述的驱动方法,其中,所述电压为通过实验确定的,对包括所述显示基板的显示装置的显示效果影响最小的电压。
- 根据权利要求4所述的驱动方法,其中,所述电压为使第n个部分对应的像素的灰阶为0的电压。
- 根据权利要求1所述的驱动方法,其中,第1个部分至第N个部分显示扫描完成后,复位第1个部分至第N个部分对应的像素,以使所述像素具有相同的灰阶,第1个部分至第N个部分同时开始触控。
- 根据权利要求1所述的驱动方法,其中,所述第n个部分为所述触控驱动电极与触控感应电极接近的部分,仅复位第n个部分对应的像素。
- 根据权利要求1所述的驱动方法,其中,在第n个部分的触控时间段内,向第n个部分包括的所述触控驱动电极施加触控驱动信号;在第n个部分的显示扫描时间段内,向第n个部分包括的所述触控驱动电极施加公共电极信号。
- 一种具有触控功能的显示基板,包括多行沿平行于栅线的方向延伸的触控驱动电极,其中,所述触控驱动电极分为N个部分,所有部分沿垂直于所述栅线的方向依次设置,其中,N为大于等于2的正整数;每个部分包括的所述触控驱动电极连接一条驱动线,在第n个部分触控开始之前,第n个部分对应的像素能够复位并具有相同的灰阶,其中,n为大于等于1且小于等于N的正整数,从而使得第n个部分对应的所有液晶分子的偏转状态相同;在第n个部分的触控时间段内,第n个部分包括的触控驱动电极施加有触控驱动信号;在第n个部分的显示扫描时间段内,第n个部分包括的触控驱动电极施加有公共电极信号。
- 根据权利要求11所述的显示基板,还包括栅线、数据线、薄膜晶体管和像素电极,所述像素电极具有狭缝或者为条状电极,所述触控驱动电极绝缘设置于所述像素电极上方。
- 根据权利要求12所述的显示基板,还包括屏蔽结构,所述屏蔽结构覆盖于所述数据线上方,且和所述像素电极同层设置。
- 一种触控显示装置,包括如权利要求11-13任一项所述的具有触控功能的显示基板。
- 根据权利要求14所述的显示装置,还包括复位开启信号输入模块,所述复位开启信号输入模块用于在第n个部分触控开始之前,向第n个部分输入复位开启信号,所述复位开启信号使第n个部分对应的像素进行复位,以使所述像素具有相同的灰阶,其中,n为大于等于1且小于等于N的正整数。
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