WO2015096301A1 - 触控显示装置驱动方法及触控显示装置 - Google Patents

触控显示装置驱动方法及触控显示装置 Download PDF

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Publication number
WO2015096301A1
WO2015096301A1 PCT/CN2014/075261 CN2014075261W WO2015096301A1 WO 2015096301 A1 WO2015096301 A1 WO 2015096301A1 CN 2014075261 W CN2014075261 W CN 2014075261W WO 2015096301 A1 WO2015096301 A1 WO 2015096301A1
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WIPO (PCT)
Prior art keywords
time
touch
phase
display device
touch display
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Application number
PCT/CN2014/075261
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English (en)
French (fr)
Inventor
程鸿飞
张玉欣
Original Assignee
京东方科技集团股份有限公司
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Priority to US14/408,531 priority Critical patent/US10101842B2/en
Publication of WO2015096301A1 publication Critical patent/WO2015096301A1/zh

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    • G—PHYSICS
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    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—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
    • 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 
    • G02F1/13—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  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • G02F1/00—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
    • 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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    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
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    • 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
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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    • 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
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    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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    • G09G3/3413—Details of control of colour illumination sources
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    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—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
    • 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 
    • G02F1/13—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  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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    • H—ELECTRICITY
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Definitions

  • Embodiments of the present invention relate to the field of display technologies, and in particular, to a touch display device driving method and a touch display device.
  • touch screens can be divided into: Add on Mode Tfouch Panel, On Cell Touch Panel, and in-cell touch panel (In Ceii Touch Panel).
  • the in-cell touch screen embeds the touch electrodes of the touch screen inside the liquid crystal display.
  • the more common is the time-sharing complex ffi technology, which divides the original screen display time unit into two parts, wherein part of the time (ie, the display stage) the touch screen is used to display images, and The touch screen is used to implement the touch detection function in a part of the time (ie, the touch stage).
  • the touch driving signal has a certain interference to the normal display of the liquid crystal.
  • the touch screen is more widely used in the handheld device, the demand for the low power consumption of the touch screen is also increasing. . It is necessary to make the touch driving signal (Tx) of the touch stage have a lower driving frequency. When the frequency of the touch driving signal is lowered, the interference phenomenon of the touch driving signal to the normal display of the touch screen is more obvious, and the situation that the interference appears on the screen is more easily observed.
  • Embodiments of the present invention provide a touch display device driving method and a touch display device, thereby ensuring screen display quality of the touch display device.
  • the embodiment of the present invention provides a touch display device driving method, the touch display device includes a touch screen, a chip, a touch driving electrode, and a backlight, and the method includes:
  • the second time phase and the third time phase are identical.
  • the first relationship is:
  • the start of the second time phase [ ⁇ : the same as the start time of the third time phase; the end time of the second time phase ⁇ is the same as the end time of the third time phase.
  • the first relationship is:
  • the start time of the second time phase is the same as the start time of the third time phase; at the end of the second time phase [ ⁇ : after the end time of the third time phase.
  • the first relationship is:
  • the start of the second time phase [ ⁇ : before the start time of the third time phase; the knot of the second time phase] is the same as the end time of the third time phase.
  • the first relationship is:
  • the end time of the second time phase is after the end time of the third time phase.
  • the time unit is one frame I:
  • the unit is equal to the duration of the first time phase and the sum of the second time steps.
  • the first time phase is a display phase
  • the second time phase is a touch phase.
  • the embodiment of the present invention further provides a touch display device, which can be driven by the touch display device driving method provided by the embodiment of the present invention.
  • the touch screen is an ADS mode LCD screen.
  • the touch screen comprises an upper substrate and a lower substrate, wherein the upper substrate is provided with a sensing electrode, the lower substrate is provided with a common electrode and a pixel electrode in different layers, and the liquid between the sensing electrode and the common electrode is optionally provided.
  • the common electrode and the pixel electrode are respectively covered by an insulating layer and a passivation layer.
  • the touch display device driving method and the touch display device provided by the embodiments of the present invention control the backlight to be in an open state during a first time period of the inter-turn unit; Controlling the backlight to be off during a second time period of the time unit a third time period of the time unit, the chip sends a touch driving signal to the touch driving electrode; the second time phase and the third time phase have a first relationship, and the touch ensures display The screen display quality of the device.
  • FIG. 1 is a schematic flow chart of a method for driving a touch display device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram 1 of a touch display device according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram 2 of a touch display device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view 3 of a touch display device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a time division multiplexing waveform involved in a driving method of a touch display device according to an embodiment of the present invention.
  • the embodiment of the present invention provides a touch display device driving method, where the touch display device includes a touch screen, a chip, a touch driving electrode, and a backlight, and the like, as shown in FIG. include: Step 11, in the first time phase of the time unit, controlling the backlight to be in an on state; Step 12, controlling the backlight to be in a closed state during the second time phase of the time unit; The third time period of the unit, the chip sends a touch driving signal to the touch driving electrode; and the first time phase has a first relationship with the third time phase.
  • the touch display device driving method provided by the embodiment of the present invention eliminates the touch phase by temporarily turning the backlight into a closed state during the second time phase, that is, the touch phase.
  • the touch driving signal is transmitted at a lower frequency, thereby reducing the power consumption of the touch display device.
  • the response of the liquid crystal molecules to the external voltage signal has a delayed effect, that is, the liquid crystal molecules do not respond immediately to the external signal, but are delayed for a certain time, which is the response time of the liquid crystal; when the touch driving signal is a high frequency, the liquid crystal molecules Can not keep up with the rapidly changing external electric field, the liquid crystal molecules will maintain the original arrangement, the high-frequency touch drive signal does not have much influence on the alignment state of the liquid crystal molecules in the display state, that is, the high-frequency touch drive signal pair
  • the normal display interference of the liquid crystal is small; when the touch drive signal is a low frequency signal, the arrangement of the liquid crystal molecules will change with the change of the touch drive signal, the display state will change, and the normal display of the liquid crystal will have a relatively large interference and the display quality of the screen. Have a significant impact.
  • the touch display device driving method provided by the embodiment of the present invention turns off the backlight during the touch phase, so that the human touch can not observe the interference of the touch driving signal on the liquid crystal display state, thereby eliminating the touch phase touch.
  • the control phase uses a low-frequency touch drive signal for detecting touch operations, and in the case of a low-frequency (for example, several tens of hertz to several hundred hertz) touch drive signals, the screen display of the touch display device is ensured.
  • the touch display device driving method provided by the embodiment of the present invention can ensure the touch display device when the frequency of the touch driving signal is several hundred hertz or even several tens of hertz. Picture quality
  • the backlight in order to ensure that the chip sends the touch driving signal to the touch driving electrode, the backlight is already in the off state, and the backlight closing phase, that is, the second time phase, may be preset, and the chip transmits the touch driving.
  • the time phase of the signal is the first relationship between the third time phases.
  • the foregoing first relationship may be specifically:
  • the foregoing first relationship may specifically be:
  • the first relationship can also be:
  • the end time of the interstage is the same.
  • the backlight is already in the off state, so as to eliminate the interference of the touch driving signal on the normal display of the liquid crystal and the influence on the display quality of the screen.
  • the interference of low-frequency (for example, several tens of hertz to several hundred hertz) touch driving signals on the normal display of the liquid crystal and the influence on the display quality of the screen are eliminated.
  • the time unit of the present invention may specifically be other time units.
  • the duration of the time unit involved in the embodiment of the present invention may be equal to the sum of the duration of the first time period and the duration of the second time period.
  • the duration of the time unit according to the embodiment of the present invention may be greater than the sum of the duration of the first-time phase and the duration of the second time phase.
  • the touch display device When the touch display device is driven by the time division multiplexing technology, the touch display device can be in the display phase and the touch phase. Therefore, the first time phase involved in the embodiment of the present invention may specifically be the display phase. The second time period involved in the embodiment may specifically be a touch phase.
  • the touch display device according to the embodiment of the present invention is an advanced super-dimensional field conversion technology mode (ADDS), which is an ADS (ADS), which is an in-cell touch display device.
  • ADDS advanced super-dimensional field conversion technology mode
  • ADS ADS
  • the specific application process of the touch display device driving method provided by the embodiment is described in detail:
  • the in-cell touch display device may specifically include an ADS mode liquid crystal screen and a backlight 1.
  • the ADS mode liquid crystal screen is an embedded capacitive touch display screen, and the backlight 1 is connected with a backlight control signal ( B C cra).
  • B C cra backlight control signal
  • the liquid crystal display of the ADS mode utilized in this embodiment implements a display function and a touch function in a time-phase, that is, the liquid crystal display of the ADS mode is in an open state in a first time period of a time unit (for example, one frame), The backlight 1 is in a closed state during the second time period of the time unit.
  • a strip-shaped sensing electrode 3 (shown in Fig. 2) is first formed on the upper substrate 2 of the ADS liquid crystal display, and the sensing electrode 3 is connected to the sensing signal line (Rx).
  • a common electrode 5 and a pixel electrode 6 are prepared on the lower substrate 4, and a liquid crystal layer 7 is interposed between the sensing electrode 3 and the common electrode 5.
  • the common electrode 5 and the pixel electrode 6 are formed in different layers and pass through the insulating layer 8 and the passivation layer, respectively. 9 coverage.
  • the common electrode 5 and the pixel electrode 6 realize a display function during the display period, and the common electrode 5 can serve as a driving electrode and a strip-shaped sensing electrode 3 of the upper substrate 2 to form a mutual inductance capacitor during the touch period.
  • a schematic diagram of the layer structure of the ADS liquid crystal display according to the embodiment of the present invention can be as shown in FIG.
  • the common electrode 5 can be divided as a driving electrode.
  • a common electrode corresponding to the two columns of pixel electrodes 6 can be selected as a driving electrode, and the touch driving signal line Tx is connected, as shown in FIG.
  • the lower substrate 4 (not shown) has a plurality of gate lines Gatel, Gate2, Gate3, ..., a plurality of data lines Data1, Data 2, Data3, ..., and the pixel electrodes 6 are located on the gate lines and the data lines.
  • the intersection of the thin film transistor is connected to the data line, the gate of the thin film transistor is connected to the gate line of the row, and the insulating layer 8 is present between the pixel electrode 6 and the common electrode 5.
  • the schematic diagram of the time division multiplexing waveform involved in the driving method of the touch display device of the embodiment of the present invention may be specifically as shown in FIG. 5 , for example, the time for displaying a frame of the touch display device is 16, 7 ms, and the selected one is selected. 4ms is used as the touch time period, and the other 12,7ms is used as the display time period. Of course, the duration of the two chips can be adjusted according to the processing capability of the IC chip.
  • the gate lines Gateel, Gate2, ..., GaieN are sequentially gated during the display period, the data line Data outputs display data during the display period, and the backlight control signal Bccm is at the high level during the display period, and the touch display device can be realized. Display function.
  • the backlight control signal Beon is at a low level, and the backlight is turned off, and the touch sensing signal line is detected when the touch driving signal is loaded on the touch driving electrode through the touch driving signal line Tx.
  • the driving signal of the touch phase may have a certain interference to the normal display of the liquid crystal, and there may be a bad display of the screen.
  • the backlight is temporarily turned off, and the black input function is used to eliminate the touch phase. Show the impact of quality.
  • the present invention can eliminate the influence of a lower frequency driving signal on the display quality of the screen, and the frequency of the touch driving signal can be as low as several tens to several hundreds of hertz, which can greatly reduce the power consumption required for the touch function, which extends the movement.
  • the charging interval of the product will be of great help.
  • the specific touch principle of the embodiment of the present invention is: when the touch driving signal is applied to the touch driving electrode 5 by the touch driving signal line Tx, the voltage signal that the touch sensing signal line Rx is coupled through the sensing capacitor is detected.
  • the human body touches the touch screen, the human body electric field acts on the sensing capacitor, so that the capacitance value of the sensing capacitor changes, thereby changing the voltage signal coupled by the touch sensing signal line, according to the change of the voltage signal, The contact position can be determined.
  • the embodiment of the present invention further provides a touch display device, which can be driven by the touch display device driving method provided by the embodiment of the present invention.
  • the touch display screen according to the present invention is an ADS mode liquid crystal display as an example, and the technical solutions provided by the present invention are described in detail, but it should be noted that the embodiments of the present invention are related to
  • the touch display device is not limited to the ADS mode liquid crystal display, and includes touch display devices such as Twisted Nematic (TN) and Vertical Alignment (VA).
  • TN Twisted Nematic
  • VA Vertical Alignment
  • the touch display device of the embodiment of the present invention also includes an organic light-emitting diode (OLED) display device, and the OLED is turned off during the touch phase to ensure the touch phase.
  • OLED organic light-emitting diode
  • the touch display device driving method provided by the embodiment of the present invention can also be applied to an external touch display device, a cover surface touch display device, and an in-cell touch display. Other classes such as devices Type of touch display device.
  • the touch display device driving method and the touch display device provided by the present invention control the backlight to be in an open state during a first time period of the time unit; Controlling, in a second time period, the backlight is in a closed state; in a third time period of the time unit, the chip sends a driving signal to the touch driving electrode; the second time phase and the third time There is a first relationship between the time phases to ensure the picture display quality of the touch display device.

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Abstract

本发明的实施例提供了一种触控显示装置驱动方法及触控显示装置，通过在时间单元的第一时间阶段内，控制所述背光源处于开启状态；在所述时间单元的第二时间阶段内，控制所述背光源处于关闭状态；在所述时间单元的第三时间阶段内，芯片向触控驱动电极发送触控驱动信号；所述第二时间阶段与第三时间阶段之间具有第一关系，从而确保触控显示装置的画面显示质量。

Description

本发明的实施例涉及显示技术领域， 具体可以涉及一种触控显示装置驱 动方法及触控显示装置。
目前，触控屏按照组成结构可以分为：外挂式触控屏（Add on Mode Tfouch Panel ) 覆盖表面式触控屏（ On Cell Touch Panel )、以及内嵌式触控屏（In Ceii Touch Panel 其中， 内嵌式触控屏将触控屏的触控电极内嵌在液晶显示屏内 部。
目前， 对于触控屏驱动技术方案中， 比较常见的是分时复 ffi技术， 即将 原来的屏幕显示时间单元分成两部分， 其中一部分时间内 （即显示阶段） 触 控屏用于显示图像， 另一部分时间内 （即触控阶段） 触控屏用于实现触控侦 测功能。
现有技术中， 触控驱动信号对液晶的正常显示有一定的干扰， 随着触控 屏在手持设备的应用越来越广泛， 对触控屏的低功耗的需求也就越来越大。 需使触控阶段的触控驱动信号 （Tx) 具有较低的驱动频率。 而降低触控驱动 信号的频率， 将会触控驱动信号对触控屏的正常显示的干扰现象更加明显，， 这种干扰出现画面显示不良的情况更易被观察到。
本发明的实施例提供一种触控显示装置驱动方法及触控显示装置， 从而 确保触控显示装置的画面显示质量。
本发明的实施例提供方案如下：
本发明的实施例提供了一种触控显示装置驱动方法， 所述触控显示装置 包括触控屏、 芯片、 触控驱动电极以及背光源， 所述方法包括：
在时间单元的第一时间阶段内， 控制所述背光源处于开启状态； 在所述时间单元的第二时间阶段内， 控制所述背光源处于关闭状态； 在所述时间单元的第三时间阶段内， 所述芯片
触控驱动信号；
所述第二时间阶段与第三时间阶段之
Figure imgf000003_0001
可选的， 所述第一关系为：
所述第二时间阶段的起始时〔曰： 与所述第三时间阶段的起始时间相同; 所述第二时间阶段的结束时^ 与所述第三时间阶段的结束时间相同。 可选的， 所述第一关系为：
所述第二时间阶段的起始时^ 与所述第三时间阶段的起始时间相同; 所述第二时间阶段的结束时〔曰： 在所述第三时间阶段的结束时间之后。 可选的， 所述第一关系为：
所述第二时间阶段的起始时〔曰： 在所述第三时间阶段的起始时间之前； 所述第二时间阶段的结] ί时^ 与所述第三时间阶段的结束时间相同。 可选的， 所述第一关系为：
Figure imgf000003_0002
在所述第三时间阶段
所述第二时间阶段的结束时间， 在所述第三时间阶段的结束时间之后。 可选的， 所述时间单元为一帧 I：
可选的， 所述 ¾]单元等于所述第一时间阶段的时长 所述第二时间阶 之和。
可选的， 所述第一时间阶段为显示阶段， 所述第二时间阶段为触控阶段。 本发明的实施例还提供了一种触控显示装置， 该触控显示装置具体可应 )¾上述本发明实施例提供的触控显示装置驱动方法进行驱动。
可选的， 触控屏为 ADS模式液晶屏。
可选的， 触控屏包括上基板和下基板， 上基板上设有感应电极， 下基板 上设有处于不同层的公共电极和像素电极， 感应电极和公共电极之间设有液 可选的， 公共电极和像素电极分别通过绝缘层和钝化层覆盖。
从以上所述内容可以看出， 本发明的实施例提供的触控显示装置驱动方 法及触控显示装置， 通过在 i吋间单元的第一时间阶段内， 控制所述背光源处 于开启状态； 在所述时间单元的第二时间阶段内， 控制所述背光源处于关闭 状态； 在所述时间单元的第三时间阶段内， 芯片向触控驱动电极发送触控驱 动信号； 所述第二时间阶段与第三时间阶段之间具有第一关系， 丛而确保触 控显示装置的画面显示质量。
图 1为本发明的实施例提供的触控显示装置驱动方法流程示意图； 图 2为本发明的实施例提供的触控显示装置结构示意图一；
图 3为本发明的实施例提供的触控显示装置结构示意图二；
图 4为本发明的实施例提供的触控显示装置结构示意图三；
图 5为本发明的实施例提供的触控显示装置驱动方法所涉及的分时复用 波形示意图。
为使本发明的实施例的目的、 技术方案和优点更加清楚， 下面将结合本 发明的实施例的附图， 对本发明的实施例的技术方案进行清楚、完整地描述。 显然， 所描述的实施例仅是本发明的一部分实施例， 而不是全部的实施例。 基于所描述的本发明的实施例， 本领域的普通技术人员所获得的所有其他实 施例， 都属于本发明保护的范围。
除非另作定义， 此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。 本发明专利申请的说明书以及 权利要求书中使用的 "第一 "、 "第二" 以及类似的词语并不表示任何顺序、 数量或者重要性， 而只是 来区分不同的组成部分。 同样， "一个 "或者 "一" 等类似词语 ffi不表示数量限制， 而是表示存在至少一个。 "连接"或者 "相连" 等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接， 不管是直接的还是间接的。 "上"、 "下"、 "左"、 "右"等仅用于表示相对位置 关系， 当被描述对象的绝对位置改变后， 则该相对位置关系也相应地改变。
本发明的实施例提供了一种触控显示装置驱动方法， 所述触控显示装置 包括触控屏、 芯片、 触控驱动电极以及背光源等器件， 如 ffi图 1所示， 该方 法具体可以包括： 步骤 11，在时间单元的第一时间阶段内，控制所述背光源处于开启状态; 步骤 12， 在所述时间单元的第二时间阶段内， 控制所述背光源处于关闭 状态； 在所述时间单元的第三时间阶段内， 所述芯片向所述触控驱动电极发 送触控驱动信号； 所述第二时间阶段与第三时间阶段之间具有第一关系。
本发明的实施例提供的触控显示装置驱动方法， 通过在第二时间阶段， 即触控阶段， 将背光源暂时处于关闭状态， 丛而起到插黑的作 ， 以此来消 除触控阶段触控驱动信号对液晶正常显示的干扰和对画面显示品质的影响， 从而确保触控显示装置的画面显示质量， 并 ϋ， 由于本发明的实施例所涉及 的触控显示装置可在触控阶段以较低的频率发送触控驱动信号， 因此可降低 触控显示装置的功耗。
液晶分子对外部电压信号的响应有一个延迟的效应， 即液晶分子对外部 信号不是马上响应， 而是延迟一定的时间， 这就是液晶的响应时间； 触控驱 动信号为高频率时， 液晶分子因为跟不上快速变化的外部电场， 液晶分子就 会保持原来的排列， 高频的触控驱动信号对显示状态的液晶分子排列状态没 有太大影响， 也就是说， 高频的触控驱动信号对液晶的正常显示干扰小； 当 触控驱动信号为低频信号时， 液晶分子的排列会随触控驱动信号的变化而变 化， 显示状态会改变， 对液晶正常显示产生比较大干扰以及对画面显示品质 产生明显影响。
因此， 本发明的实施例所提供的触控显示装置驱动方法， 在触控阶段将 背光源关闭， 使人限不能观察到触控驱动信号对液晶显示状态的干扰， 以此 消除触控阶段触控驱动信号对液晶正常显示的干扰和对画面显示品质的影 响， 尤其是低频率的触控驱动信号对液晶正常显示的干扰和对画面显示品质 的影响，这样就可以实现触控显示装置在触控阶段使用低频的触控驱动信号， 以用于侦测触控操作， 丛而在低频率 （例如几十赫兹至几百赫兹） 触控驱动 信号的情况下， 确保触控显示装置的画面显示质量， 并可降低触控显示装置 本发明的实施例所提供的触控显示装置驱动方法， 能够在触控驱动信号 的频率为几百赫兹甚至几十赫兹的情况下， 确保触控显示装置的画面显示质 发明的具体实施例中， 为了确保芯片向触控驱动电极发送触控驱动 信号的时， 背光源已经处于关闭状态， 可预先设定背光源关闭阶段即第二时 间阶段， 与芯片发送触控驱动信号的时间阶段即第三时间阶段之间的第一关 系。
那么， 在一个具体实施例中， 上述第一关系具体可为：
， 与第三时间阶段的起始时间相同；
， 与第三时间阶段的结束时间相同。
个具体实施例中， 上述第一关系具体还可为：
， 与第三时间阶段的起始时间相同；
Figure imgf000006_0001
， 在第三时间阶段的结束时间之后。
1:述第一关系具体还可为：
间阶段的起始时间之前；
间阶段的结束时间相同。
Figure imgf000006_0002
所述第二时间阶段的起始时间， 在所述第三时间阶段的起始时间之前； 所述第二时间阶段的结東时间， 在所述第三时间阶段的结束时间之后。 总之， 本发明的实施例中， 需确保芯片向触控驱动电极发送触控驱动信 号时， 背光源已经处于关闭状态， 以消除触控驱动信号对液晶正常显示的干 扰和对画面显示品质的影响， 尤其是消除低频率（例如几十赫兹至几百赫兹) 触控驱动信号对液晶正常显示的干扰和对画面显示品质的影响。
本发明 .的时间单元具体可为 或者其他时间 单元。
而且， 本发明的实施例所涉及的时间单元的时长可等于上述第一时间阶 段的时长与第二时间阶段的时长之和。 另外， 若触控显示装置在时间单元内 还存在其他功能阶段， 本发明的实施例所涉及的时间单元的时长也可以大于 上述第 -时间阶段的时长与第二时间阶段的时长之和。
触控显示装置采用分时复用技术驱动方法时， 触控显示装置可以处于显 示阶段和触控阶段， 因此， 本发明的实施例所涉及的第一时间阶段具体可为 显示阶段， 友明的实施例所涉及的第二时间阶段具体可为触控阶段。 下面， 以本发明的实施例所涉及的触控显示装置为高级超维场转换技术 模式 ( ADvanced Super Dimension Switch, ADSDS, 简称 ADS ) 0勺液晶显示 器即内嵌式触摸显示装置为例， 对本发明的实施例提供的触控显示装置驱动 方法的具体应用过程进行详细说明：
内嵌式触摸显示装置具体可以包括一个 ADS模式液晶屏，一个背光源 1， 如图 4所示， 该 ADS模式液晶屏为内嵌电容式触摸显示屏， 该背光源 1连接 一个背光控制信号（BCcra)。 当背光控制信号为高电平时， 背光源 1开启， 当 背光控制信号为低电平时， 背光源〗关闭。
该实施例所利用的 ADS 模式的液晶显示器分时段实现显示功能和触控 功能， 即该 ADS模式的液晶显示器在时间单元（例如一帧） 的第一时间阶段 内背光源 1处于开启状态， 在该时间单元的第二时间阶段内背光源 1处于关 闭状态。
该实施例中，首先可在 ADS液晶显示器的上基板 2上制备条状感应电极 3 (如 图 2所示）， 感应电极 3连接感应信号线（Rx)。在下基板 4上制备公 共电极 5和像素电极 6， 感应电极 3和公共电极 5之间夹含液晶层 7， 公共电 极 5和像素电极 6制作在不同层， 并分别通过绝缘层 8以及钝化层 9覆盖。 公共电极 5和像素电极 6在显示时段实现显示功能， 在触控时段公共电极 5 又可作为驱动电极和上基板 2的条状感应电极 3形成互感电容。 本发明的实 施例所涉及的 ADS液晶显示器的层结构示意图可如 图 4所示。
该实施例中， 可对公共电极 5分割作为驱动电极， 例如可以选用对应两 列像素电极 6的公共电极作为一个驱动电极， 连接触控驱动信号线 Tx， 如附 图 3所示。 下基板 4 (图中未示出）上有多条栅线 Gatel、 Gate2、 Gate3、 ...， 多条数据线 Datal、 Data 2, Data3、 ...， 像素电极 6位于栅线和数据线的交叉 处， 并通过薄膜晶体管与数据线连接， 薄膜晶体管的栅极与所在行的栅线连 接， 像素电极 6与公共电极 5之间存在绝缘层 8。
本发明的实施例触控显示装置驱动方法所涉及的分时复用波形示意图具 体可如 图 5 所示， 可举例说明， 例如触控显示装置的显示一帧的时间为 16,7ms, 选取其中 4ms作为触控时间段， 其他的 12,7ms作为显示时间段， 当 然也可以根据 IC 芯片的处理能力适当的调整两者的时长， 在此不做具体限 定。 栅线 Gatel、 Gate2、 ...、 GaieN在显示时间段依次选通， 数据线 Data 在显示时间段输出显示数据， 背光源控制信号 Bccm在显示时间段为高电平， 触控显示装置可以实现显示功能。
在作为触控时间段 4ms内， 背光源控制信号 Beon为低电平， 此时背光 源关闭，通过触控驱动信号线 Tx对触控驱动电极加载触控驱动信号时，检测 触控感应信号线 Rx通过感应电容耦合出的电压信号。通常触控阶段驱动信号 会对液晶正常显示有一定的干扰， 并有可能会出现画面显示不良， 此时需要 背光源暂时处于关闭状态， 起到插黑作用， 以此来消除触控阶段对画面显示 品质的影响。 本发明尤其能够消除较低频率的驱动信号对画面显示品质的影 响， 触控驱动信号的频率可低至几十到几百赫兹， 可以大大降低触控功能所 需的功耗， 这对延长移动产品的充电间隔时间将会大有帮助。
本发明的实施例所涉及的具体触控原理为：通过触控驱动信号线 Tx对触 控驱动电极 5加载触控驱动信号时，检测触控感应信号线 Rx通过感应电容耦 合出的电压信号， 在此过程中， 有人体接触触摸屏时， 人体电场就会作用在 感应电容上， 使感应电容的电容值发生变化， 进而改变触控感应信号线耦合 出的电压信号， 根据电压信号的变化， 就可以确定触点位置。
本发明的实施例还提供了一种触控显示装置， 该触控显示装置具体可应 上述本发明的实施例提供的触控显示装置驱动方法进行驱动。
上述实施例中， 以本发明所涉及的触控显示屏为 ADS模式液晶显示器为 例， 对本发明所提供的技术方案进行了详细的说明， 但需要说明的是， 本发 明的实施例所涉及的触控显示装置， 并不限于 ADS模式液晶显示器， 也包括 扭曲向列相模式 ( Twisted Nematic, TN)、 垂直排列模式（Vertical Alignment, VA) 等触控显示装置。
另外， 本发明的实施例所涉及的触摸显示装置也包括触控有机发光二极 管 （Organic Light-Emitting Diode, OLED) 显示装置， 并通过在触控阶段关 闭 OLED的方式， 以实现在触控阶段确保触控 OLED显示装置的画面显示质 同时， 本发明的实施例所提供的触控显示装置驱动方法也可应用与外挂 式触控显示装置、 覆盖表面式触控显示装置， 内嵌式触控显示装置等其他类 型的触控显示装置。
从以上所述可以看出， 本发明提供的触控显示装置驱动方法及触控显示 装置， 通过在时间单元的第一时间阶段内， 控制所述背光源处于开启状态； 在所述时间单元的第二时间阶段内， 控制所述背光源处于关闭状态； 在所述 时间单元的第三时间阶段内， 所述芯片向所述触控驱动电极发送驱动信号； 所述第二时间阶段与第三时间阶段之间具有第一关系， 从而确保触控显示装 置的画面显示质量。
以上所述仅是本发明的可选实施方式， 应当指出， 对于本技术领域的普 通技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润 饰， 这些改进和润饰也应视本发明的保护范围。

Claims

1 . 一种触控显示装置驱动方法， 所述触控显示装置包括触控屏、 芯片、 触控驱动电极以及背光源， 其中， 所述方法包括：
在时间单元的第一时间阶段内， 控制所述背光源处于开启状态； 在所述时间单元的第二时间阶段内， 控制所述背光源处于关闭状态； 在所述时间单元的第三时间阶段内， 所述芯片向所述触控驱动电极发送 触控驱动信号；
所述第二时间阶段与第三时间阶段之间具有第一关系。
2. 如权利要求 1所述的方法， 其中， 所述第一关系为：
所述第二时间阶段的起始时间， 与所述第三时间阶段的起始时间相同； 所述第二时间阶段的结束时间， 与所述第三时间阶段的结束时间相同。
3. 如权利要求 1所述的方法， 其中， 所述第一关系为：
所述第二时间阶段的起始时间， 与所述第三时间阶段的起始时间相同； 所述第二时间阶段的结束时间， 在所述第三时间阶段的结束时间之后。
4. 如权利要求 1所述的方法， 其中， 所述第一关系为；
所述第二时间阶段的起始时间， 在所述第三时间阶段的起始时间之前； 所述第二时间阶段的结東时间， 与所述第三时间阶段的结束时间相同。
5. 如权利要求 1所述的方法， 其中， 所述第一关系为：
所述第二时间阶段的起始时间， 在所述第三时间阶段的起始时间之前； 所述第二时间阶段的结束时间， 在所述第三时间阶段的结束时间之后。
6. 如权利要求 1-5中的任一项所述的方法， 其中， 所述时间单元为一帧 时间。
7. 如权利要求 1-6中的任一项所述的方法， 其中， 所述时间单元等于所 述第一时间阶段的时长与所述第二时间阶段的时长之和。
8. 如权利要求 1-7中的任一项所述的方法， 其中， 所述第一时间阶段为 显示阶段， 所述第二 i吋间阶段为触控阶段。
9. 一种触控显示装置， 其中， 所述触控显示装置应用如权利要求 1至 8 中任一项所述的触控显示装置驱动方法进行驱动。
10. 如权利要求 9所述的触控显示装置， 其中， 触控屏为 ADS模式液晶 屏。
1 1. 如权利要求 9或 10所述的触控显示装置， 其中， 触控屏包括上基板 和下基板， 上基板上设有感应电极， 下基板上设有处于不同层的公共电极和 像素电极， 感应电极和公共电极之间设有液晶层。
12. 如权利要求 11所述的触控显示装置， 其中， 公共电极和像素电极分 别通过绝缘层和钝化层覆盖。
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