WO2016058342A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2016058342A1
WO2016058342A1 PCT/CN2015/076520 CN2015076520W WO2016058342A1 WO 2016058342 A1 WO2016058342 A1 WO 2016058342A1 CN 2015076520 W CN2015076520 W CN 2015076520W WO 2016058342 A1 WO2016058342 A1 WO 2016058342A1
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WO
WIPO (PCT)
Prior art keywords
touch
signal
line
display panel
driving
Prior art date
Application number
PCT/CN2015/076520
Other languages
English (en)
French (fr)
Inventor
柳皓笛
叶本银
张子鹤
李亮
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/771,741 priority Critical patent/US10082900B2/en
Priority to KR1020157023474A priority patent/KR101779925B1/ko
Priority to JP2017539486A priority patent/JP6478303B2/ja
Priority to EP15753301.9A priority patent/EP3214530B1/en
Publication of WO2016058342A1 publication Critical patent/WO2016058342A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • 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
    • G—PHYSICS
    • 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
    • G—PHYSICS
    • 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
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • G—PHYSICS
    • 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
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines

Definitions

  • the present invention relates to the field of display, and in particular to a display device and a driving method of the display device.
  • the touch screen is currently the most popular information input device, which can realize human-computer interaction simply, conveniently and naturally. It is a brand-new multimedia interactive device.
  • the capacitive touch screen has the advantages of sensitive touch response and multi-touch support.
  • the integration of touch and display has become the trend of the entire display industry.
  • the On-Cell touch screen is characterized by its thinness and low process, and will be sold and rapidly growing in the market from 2014 onwards.
  • the touch sensing electrodes of the existing integrated touch screen are located on the color film substrate of the display panel, so that the touch sensing electrodes of the integrated touch screen are too close to the display panel, resulting in electrodes on the display panel (including scan lines and data lines). ) Large interference noise is generated on the touch sensing electrodes of the integrated touch screen. Due to the insufficient signal-to-noise ratio of the integrated touch screen, the integrated touch screen technology is positioned as a low-end product in the touch field.
  • a driving method of a display device including a display panel and a touch panel includes:
  • the scan line receiving the line sync signal is The orthographic projection on the display panel does not overlap with the orthographic projection of the touch driving signal line receiving the touch driving signal on the display panel.
  • the orthographic projection of the scan line receiving the line synchronizing signal on the display panel and the orthographic projection of the touch driving signal line receiving the touch driving signal on the display panel are not overlapping.
  • the frequency of the touch driving signal is greater than the frequency of the line synchronization signal.
  • the step of providing a line sync signal to the plurality of scan lines of the display panel and the step of providing the touch drive signal to the plurality of touch drive signal lines of the touch panel are simultaneously performed.
  • the driving method further includes:
  • the noise of the display panel is monitored.
  • the driving method further includes:
  • the touch driving signal line is scanned from the Nth row to the last row, and then scanning is performed from the first row of the scanning lines toward the N-1th row of the scanning lines, where N is greater than 1.
  • the driving method further includes:
  • the step of providing the touch driving signal to the plurality of touch driving signal lines of the touch panel is performed while the touch panel driving circuit of the touch panel receives the synchronization control signal.
  • a display device As another aspect of the present invention, a display device is provided, the display device A display panel, a touch panel, a display panel driving circuit, and a touch panel driving circuit, the display panel includes a plurality of scanning lines, the touch panel includes a plurality of touch driving signal lines, and the display panel driving circuit includes a line synchronization signal generating module that provides a line synchronization signal to a plurality of the scan lines, the touch panel driving circuit includes a touch driving signal generating module that provides a touch driving signal to the plurality of touch driving signal lines;
  • the line synchronization signal provided by the display panel driving circuit and the touch driving signal provided by the touch panel driving circuit satisfy a condition that a scan line of the line synchronization signal is received at least for a predetermined period of time.
  • the orthographic projection on the display panel does not overlap with the orthographic projection of the touch driving signal line receiving the touch driving signal on the display panel.
  • the line synchronization signal provided by the display panel driving circuit and the touch driving signal provided by the touch panel driving circuit may further satisfy a condition that the scanning line of the line synchronization signal is received at any time.
  • the orthographic projection on the display panel does not overlap with the orthographic projection of the touch driving signal line receiving the touch driving signal on the display panel.
  • the width of the touch driving signal line is an integer multiple of the pixel width of the display panel.
  • the display panel includes a plurality of data lines
  • the display panel driving circuit further includes a field synchronization signal generating module and a synchronization control signal generating module
  • the field synchronization signal generating module is configured to provide field synchronization to the data line.
  • the synchronization control signal generating module is configured to: when the line synchronization signal generating module provides a line synchronization signal to the first scan line, to the touch driving signal of the touch panel driving circuit
  • the generating module provides a synchronization control signal, and the touch driving signal generating module generates the touch driving signal while receiving the synchronization control signal.
  • the line synchronization signal generating module can stop providing a line synchronization signal to the plurality of scan lines of the display panel at a predetermined time before the end of displaying the image of one frame, and the touch driving signal generating module can display one frame. Stopping the driving of the plurality of touch driving signal lines of the touch panel by the predetermined time before the end of the image, the touch panel further includes a noise monitoring module, wherein the noise monitoring module is configured to monitor the noise of the display panel .
  • the touch signal driving circuit further includes a first feedback signal generating module, wherein the first feedback signal generating module can stop providing the touch driving signal to the plurality of touch driving signal lines in the touch panel driving circuit. And transmitting a first feedback signal to the display panel driving circuit, and the display panel driving circuit can stop outputting the line synchronization signal while receiving the first feedback signal.
  • a first feedback signal generating module can stop providing the touch driving signal to the plurality of touch driving signal lines in the touch panel driving circuit. And transmitting a first feedback signal to the display panel driving circuit, and the display panel driving circuit can stop outputting the line synchronization signal while receiving the first feedback signal.
  • the noise monitoring module includes a touch sensing electrode
  • the touch panel driving circuit further includes a signal monitoring module
  • the touch sensing electrode is connected to the signal monitoring module
  • the touch sensing electrode can be
  • the touch driving signal line forms a capacitor
  • the signal monitoring module is connected to the touch sensing electrode to monitor a change of a signal output by the touch sensing electrode.
  • the touch driving circuit board further includes a burst frequency adjusting module, the burst frequency adjusting module is capable of receiving the monitoring result monitored by the noise monitoring module, and the burst frequency adjusting module is configured to adjust the touch driving The burst frequency of the signal until the touch drive signal avoids the noise.
  • the touch panel driving circuit further includes a second feedback signal generating module, and the second feedback signal generating module is configured to send a second feedback signal to the display panel driving circuit when the end of displaying one frame of image, the display After receiving the second feedback signal, the panel driving circuit can control the line synchronization signal generating module to continue to issue a line synchronization signal.
  • the second feedback signal generating module is configured to send a second feedback signal to the display panel driving circuit when the end of displaying one frame of image, the display After receiving the second feedback signal, the panel driving circuit can control the line synchronization signal generating module to continue to issue a line synchronization signal.
  • the display device displays a screen for a predetermined period of time
  • the position of the scan line receiving the line sync signal HSYNC and the touch drive signal line receiving the touch drive signal Tx are staggered, and thus, the receiving A capacitive coupling is hardly generated between the scanning line of the line synchronizing signal HSYNC and the touch driving signal line that is receiving the touch driving signal Tx, thereby improving the signal-to-noise ratio of the touch panel at the predetermined timing.
  • 1 is a timing diagram showing respective signals in a driving method provided by the present invention
  • FIG. 2 is a schematic diagram showing the scanning duration of the driving method provided by the present invention.
  • FIG. 3 is a schematic block diagram of a display device provided by the present invention.
  • FIG. 4 is a schematic view showing the relationship between the width of a touch driving signal line and the width of a pixel.
  • Line synchronization signal generation module 220 Field synchronization signal generation module
  • Synchronization control signal generation module 300 touch panel
  • touch drive signal line 320 touch sensing electrode
  • touch panel driving circuit 410 touch driving signal generating module
  • the inventors of the present invention monitored the noise of the integrated display device of the prior art.
  • the display device includes a display panel and a touch panel disposed on the display panel.
  • the display panel is a liquid crystal panel
  • the touch panel includes a touch driving signal line and a touch sensing electrode.
  • the touch driving signal line can form a capacitance with the corresponding touch sensing electrode.
  • the touch driving signal is sequentially supplied to the plurality of touch driving signal lines, the touch driving signal line and the corresponding touch are received. Controlling the sensing electrode coupling causes the raw data to be generated in the touch sensing electrode.
  • the inventors of the present invention use the instrument to monitor the original signal in the touch sensing electrode of the touch panel.
  • the touch sensing electrode of the touch panel can output a normal original signal, that is, the touch sensing electrode is normally working. Work.
  • the original signal described herein refers to a signal output by the touch sensing electrode without a touch.
  • the inventors of the present invention use the instrument to monitor the raw data in the touch sensing electrodes of the touch panel. In this case, the signal output by the touch sensing electrode is no longer the original signal.
  • the waveform of the signal output by the touch sensing electrode includes two parts: one part is a periodically appearing peak, and the other part is a stable signal that always appears. The signal value of the stable signal is different from the signal value of the original signal.
  • the touch driving signal line on the touch panel covers the scan line on the display panel, and when the display panel is opened, When the touch driving signal line and the scanning line covered by the touch driving signal line simultaneously receive signals, a capacitive coupling (ie, noise) is formed between the scanning line and the corresponding touch driving signal line, thereby affecting the position of the touch point. determine.
  • Each scan refresh of the scan line of the display panel generates a large coupling capacitance with the touch drive signal line (the coupling capacitance corresponds to the monitored periodic peak), thereby changing the electrical signal of the touch drive electrode, and further The electrical signal generated in the touch sensing electrode corresponding to the touch driving signal line is changed.
  • the display panel when the display panel is displayed, the display panel further has a liquid crystal capacitor, and the liquid crystal capacitor affects the touch driving signal line (ie, the liquid crystal capacitor also changes the electrical signal in the touch driving signal line), so that The touch sensing electrode outputs a signal value different from the original signal.
  • a driving method of a display device including a display panel and a touch panel disposed on the display panel is provided in order to at least partially overcome the influence of the coupling capacitance on the touch driving signal line during scanning refresh.
  • the present invention provides a driving method suitable for a display device including an integrated touch panel.
  • the display panel includes a plurality of scan lines
  • the touch panel includes a plurality of touch drive signal lines.
  • the driving method includes:
  • the forward projection of the scan line receiving the line synchronization signal HSYNC on the display panel and the touch drive signal receiving the touch drive signal Tx at least for a predetermined period of time The orthographic projections of the lines on the display panel do not overlap.
  • the display device displays a picture for a predetermined period of time
  • the front view of the scan line receiving the line sync signal HSYNC on the display panel and the touch drive signal line receiving the touch drive signal Tx The orthographic projections on the display panel do not overlap, so the position of the scanning line receiving the line synchronizing signal HSYNC and the touch driving signal line receiving the touch driving signal Tx are staggered. Therefore, the capacitive connection between the scan line receiving the line sync signal HSYNC and the touch drive signal line receiving the touch drive signal Tx is hardly generated, so that the electrical signal in the touch drive signal line is hardly affected. Thereby, the signal to noise ratio of the touch panel within the above predetermined period of time is improved.
  • the orthographic projection of the scan line receiving the line sync signal HSYNC on the display panel and the receiving of the touch drive signal Tx do not overlap. That is, at any time when the display panel displays an image, the scan lines that are receiving the line sync signal HSYNC are all shifted from the touch drive signal lines that are receiving the touch drive signal Tx, so that any time the image is displayed, the scan line and The coupling capacitance between the touch driving signal lines is small, so that the touch panel has a high signal to noise ratio at any time when the image is displayed.
  • the plurality of data lines and the plurality of scan lines on the display panel divide the display panel into a plurality of pixel units, and the plurality of pixel units are arranged in a plurality of rows and columns, and each of the scan lines corresponds to one row of pixel units.
  • the width of the touch driving signal line on the touch panel is set such that the touch driving signal line can cover a plurality of rows of pixel units. For example, for a display device having a resolution of 1280 ⁇ 720, the width of the touch driving signal line can be set to 107 times the width of the pixel unit. That is, one row of touch drive signal lines covers 107 rows of pixel units.
  • the pulse width of the touch drive signal Tx can be set to 107 times the pulse width of the line sync signal HSYNC.
  • the present invention is not limited thereto, and the width of the touch driving signal line may be any integer multiple of the pixel unit width as long as the position of the touch point can be accurately determined.
  • the frequency of the touch driving signal Tx may be greater than the scanning frequency of the display panel.
  • the scanning frequency of the display panel is 60 Hz, and the scanning frequency of the touch driving signal Tx can be set to 120 Hz.
  • the step of providing a line synchronization signal HSYNC to the plurality of scan lines of the display panel and providing the touch drive signal Tx to the plurality of touch drive signal lines of the touch panel are provided.
  • the steps are taken simultaneously.
  • a liquid crystal capacitor in the display panel may also affect the touch panel.
  • the driving method may further include:
  • the time for displaying one frame of image is divided into two parts: one part is a display time period, and the other part is a noise monitoring time period.
  • the image is not displayed during the period of monitoring noise, and only the noise generated by the liquid crystal capacitor is monitored, so that the frequency and size of the noise generated by the liquid crystal capacitor can be accurately obtained.
  • Methods of monitoring noise are well known in the art and will not be described again here.
  • the touch drive signal Tx may be subjected to frequency hopping adjustment to avoid noise. Specifically, the burst frequency of the touch driving signal Tx is adjusted according to the noise of the display panel obtained in the step of monitoring the noise of the display panel until the touch driving signal Tx avoids the noise. That is, the bursting frequency of the touch driving signal Tx can be adjusted to be staggered from the noise signal, so that the noise does not affect the touch driving signal Tx in the touch driving signal line, so that the touch sensing electrode and the touch are not The touch sensing signals generated by the coupling of the driving signal lines are affected, and the position coordinates of the touched points can be determined more stably.
  • the above steps are only steps that need to be performed when displaying one frame of image, and the above steps are repeated when displaying the next frame of image.
  • the scan line receiving the line sync signal HSYNC should be as far as possible away from the touch of the touch drive signal Tx.
  • Control the drive signal line Generally, scanning multiple scan lines of the display panel one by one from the first line of scanning lines, Alternatively, as shown in FIG. 2, the touch driving signal line may be scanned from the Nth row to the last row, and then scanned from the first row of the scanning lines toward the N-1th row. .
  • N is greater than 1.
  • the oblique solid line represents the line sync signal HYSNC scanning the scan line progressively from the first group of pixels
  • the slope of the oblique solid line represents the line sync signal HYSNC
  • the scan rate, the center dotted line represents the touch drive signal Tx, and the touch drive signal line is progressively scanned.
  • the slope of the center dotted line represents the scan rate of the touch drive signal Tx.
  • each row of touch drive signal lines corresponds to, for example, 107 rows of pixels.
  • the first group of pixels is the first row to the 107th row of pixels
  • the second group of pixels is the 108th row to the 214th row of pixels
  • the eleventh group of pixels is the 1071th row to the 1st row of pixels
  • the twelfth group of pixels is Lines 1178 to 1280 are pixels. It is easy to understand that the last set of pixels has fewer rows than the other sets.
  • the touch panel starts scanning from the fourth row of touch drive signal lines in order to avoid scanning of the display panel.
  • the 9th line touch driving signal line covers the pixels being scanned (ie, covering the signal line being scanned) Therefore, at this time, the 9th line touch driving signal line is not scanned, but the 10th line touch driving signal line is scanned. After the scanning of the touch driving signal line of the 10th line is completed, the regression scanning of the 9th line touch driving signal line is continued.
  • the driving method further includes providing the data line of the display panel while providing the line synchronization signal HSYNC to the first scan line of the display panel.
  • the column sync signal VSYNC, the column sync signal VSYNC is a pulse signal, and one column sync signal VSYNC is displayed for each frame of image display.
  • the driving method further includes:
  • the step of providing the touch driving signal Tx to the plurality of touch driving signal lines of the touch panel is performed while the touch panel driving circuit of the touch panel receives the synchronization control signal SYNC.
  • the purpose of providing the synchronous control signal SYNC is to enable the horizontal synchronizing signal HSYNC to be simultaneously emitted with the touch driving signal Tx to control the timing of the horizontal synchronizing signal HSYNC and the touch driving signal Tx in a subsequent process.
  • the display device includes a display panel 100 , a touch panel 300 , a display panel driving circuit 200 , and a touch panel driving circuit 400 .
  • the display panel 100 includes a plurality of scanning lines 110
  • the touch panel 300 includes multiple touches.
  • the driving signal line 310 includes a line synchronizing signal generating module 210 for sequentially supplying a line synchronizing signal HSYNC to the plurality of scanning lines 110.
  • the touch panel driving circuit 400 includes providing touch to the plurality of touch driving signal lines 310.
  • the touch driving signal generating module 410 for controlling the driving signal Tx, wherein the line synchronizing signal HSYNC provided by the display panel driving circuit 200 and the touch driving signal Tx provided by the touch panel driving circuit 400 satisfy the following conditions : at least for a predetermined period of time, the orthographic projection of the scan line 110 receiving the line synchronizing signal HSYNC on the display panel 100 and the touch driving signal line 310 receiving the touch driving signal Tx are on the display panel The orthographic projections on 100 do not overlap.
  • the scan line 110 receiving the line sync signal HSYNC and the touch drive signal line 310 receiving the touch drive signal Tx are offset from each other, thereby reducing the scan line 110 and the touch drive signal line.
  • the coupling capacitance between 310 is advantageous for increasing the signal-to-noise ratio of the touch panel 300 so that the position coordinates of the touched point can be accurately determined.
  • the line synchronization signal HSYNC provided by the display panel driving circuit 200 and the touch provided by the touch panel driving circuit 400 are preferably used.
  • the drive signal Tx satisfies the following Condition: at any time, the orthographic projection of the scan line 110 receiving the line synchronizing signal HSYNC on the display panel 100 and the touch driving signal line 310 receiving the touch driving signal Tx are on the display panel 100 The orthographic projections do not overlap.
  • the width of the touch driving signal line 310 may be an integral multiple of the pixel width of the display panel 100. It is easily understood that the touch driving signal line 310 can be fabricated using a transparent electrode material.
  • FIG. 4 is a schematic diagram showing the relationship between the width of the touch driving signal line and the width of the pixel, wherein the solid line indicates the outline of the touch driving signal line 310, and the broken line indicates the outline of the pixel unit.
  • the width of each touch driving signal line 310 is twice the width of each line of pixels.
  • FIG. 4 is only for explaining that the width of the touch driving signal line 310 is larger than the width of the pixel, and does not mean that the width of the touch driving signal line 310 can be set to twice the pixel width when actually manufacturing the display device.
  • the width of the touch driving signal line 310 may be 107 times the width of the pixel unit.
  • the display panel 100 includes a plurality of data lines 120
  • the display panel driving circuit 200 further includes a field sync signal generating module 220 for providing a field sync signal VSYNC to the data lines 120.
  • the reception of the field sync signal VSYNC by the data line 120 means the beginning of a frame of image.
  • the touch driving signal Tx is formed in synchronization with the horizontal synchronizing signal HSYNC.
  • the display panel driving circuit 200 may further include providing a synchronous control signal to the touch driving signal generating module 410 of the touch panel driving circuit 400.
  • the synchronization control signal generation module 230 of the SYNC When displaying one frame of image, the synchronization control signal generating module 230 provides the synchronization control signal SYNC to the touch driving signal generation module 410 while the line synchronization signal generating module 210 supplies the line synchronization signal HSYNC to the first scanning line, and the touch driving is performed.
  • the signal generating module 410 generates the touch driving signal Tx while receiving the synchronization control signal SYNC.
  • the synchronization control signal SYNC is generated in synchronization with the first line synchronization signal HSYNC when one frame of image is displayed, thereby facilitating control of the timing of the scan signal and the touch drive signal Tx.
  • the line synchronization signal generation module 210 can stop providing the line synchronization signal HSYNC to the plurality of scan lines 110 of the display panel 100 at a predetermined time before the end of displaying one frame of image, and the touch drive signal generation module 410 can display one frame of image.
  • the predetermined driving time before the end stops supplying the touch driving signal Tx to the plurality of touch driving signal lines 310 of the touch panel 300.
  • the touch panel 300 further includes a noise monitoring module (not shown) for monitoring the noise of the display panel 100.
  • the noise of the display panel 100 refers to the influence of the liquid crystal capacitance of the display panel 100 on the sensed signal in the touch sensing electrode 320 of the touch panel 300.
  • the influence of the liquid crystal capacitance on the touch sensing electrode 320 in the touch panel 300 can be eliminated in various ways.
  • the noise monitoring module can also take many forms.
  • the noise monitoring module includes a touch sensing electrode 320
  • the touch panel driving circuit 400 further includes a signal monitoring module 430
  • the touch sensing electrode 320 is connected to the signal monitoring module 430.
  • the touch sensing electrode 320 can form a capacitance with the touch driving signal line 310.
  • the signal monitoring module 430 is connected to the touch sensing electrode 320 to monitor the change of the signal output by the touch sensing electrode 320.
  • the touch sensing electrode 320 of the noise monitoring module is a touch sensing electrode of the touch panel 300.
  • the touch sensing electrode 320 is also used to monitor a human touch on the touch panel. The change in capacitance between the touch sensing electrode 320 and the touch driving signal line 310 caused by the 300. Using the touch sensing electrode 320 as part of the noise monitoring module facilitates simplifying the structure of the display device.
  • the touch panel driving circuit 400 may further include a first feedback signal generating module 420, the first The feedback signal generating module 420 can display the panel driving circuit 200 to the display panel driving circuit 200 when the touch panel driving circuit 400 stops supplying the touch driving signal Tx to the plurality of touch driving signal lines 310 (specifically, the display panel driving circuit 200)
  • the synchronization signal generating module 210) issues a first feedback signal TEND1, and displays the panel driving circuit 200 (specifically, the line synchronization signal generating mode of the panel driving circuit 200) Block 210) may stop outputting the line sync signal HSYNC while receiving the first feedback signal TEND1.
  • the purpose of monitoring the noise generated by the liquid crystal capacitance of the display panel 100 on the touch panel 300 is to reduce or even eliminate the influence of the liquid crystal capacitance on the touch panel 300.
  • the following describes how to reduce or even eliminate the liquid crystal.
  • the touch driving signal Tx of the touch driving circuit can be subjected to frequency hopping adjustment.
  • the touch driving circuit 400 further includes a burst frequency adjustment module 450, the burst frequency adjustment module 450 can receive the monitoring result monitored by the noise monitoring module, and the burst frequency adjustment module 450 is configured to adjust the touch The burst frequency of the drive signal Tx is controlled until the touch drive signal Tx avoids the noise.
  • the signal monitoring module 430 can be used to acquire the monitoring result monitored by the noise monitoring module, and the monitoring result is sent to the burst frequency adjustment module 450 by using the signal monitoring module 430.
  • the touch panel driving circuit 400 may further include a second feedback signal generating module 440, and the second feedback signal generating module 440 is configured to display the image of the frame to the display panel.
  • the driving circuit 200 (specifically, the line synchronizing signal generating module 210 of the display panel driving circuit 200) issues a second feedback signal TEND2, and the display panel driving circuit 200 (specifically, the line synchronization of the display panel driving circuit 200) After receiving the second feedback signal TEND2, the signal generating module 210) can control the line synchronization signal generating module 210 to continue to issue the line synchronization signal HSYNC.

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Abstract

一种显示装置及其驱动方法，该显示装置包括显示面板（100）和触摸面板（300）；该驱动方法包括：向所述显示面板的多条扫描线（110）提供行同步信号，向所述触摸面板（300）的多条触控驱动信号线（310）提供触控驱动信号，至少在预定时间段内，接收所述行同步信号的扫描线在（110）所述显示面板（100）上的正投影与接收触控驱动信号的触控驱动信号线（310）在所述显示面板（100）上的正投影不重叠。当所述显示装置在预定时间段内显示画面时，接收行同步信号的扫描线（110）与正在接收触控驱动信号的触控驱动信号线（310）的位置是错开的，接收行同步信号的扫描线（110）与正在接收触控驱动信号的触控驱动信号线（310）之间几乎不产生电容耦合，从而提高了触摸面板（300）在上述预定时刻内的信噪比。

Description

显示装置及其驱动方法 技术领域
本发明涉及显示领域，具体地，涉及一种显示装置以及该显示装置的驱动方法。
背景技术
触摸屏是目前最流行的信息输入设备，它能简单、方便、自然地实现人机交互，是一种全新的多媒体交互设备。电容式触摸屏具有触摸反应灵敏、支持多点触摸等优点。
将触摸和显示集成已成为整个显示行业的发展趋势，集成式(On-Cell)触摸屏具有轻薄、工艺环节少的特点，从2014年起将开始在市场上销售并快速增长。
现有的集成式触摸屏的触控感应电极位于显示面板的彩膜基板上面，这使得集成式触摸屏的触控感应电极与显示面板距离过近，导致显示面板上的电极(包括扫描线和数据线)对集成式触摸屏的触控感应电极产生较大的干扰噪声。由于集成式触摸屏的信噪比不够高，导致集成式触摸屏技术被定位为触控领域的低阶产品。
如何提高集成式触摸屏的信噪比成为本领域亟待解决的技术问题。
发明内容
本发明的目的在于提供一种显示装置及其驱动方法，在利用所述驱动方法驱动所述显示装置时，所述显示装置具有较高的信噪比。
为了实现上述目的，作为本发明的一个方面，提供一种显示装置的驱动方法，该显示装置包括显示面板和触摸面板，该驱动方法包括：
向所述显示面板的多条扫描线提供行同步信号；
向所述触摸面板的多条触控驱动信号线提供触控驱动信号；
其中，至少在预定时间段内，接收所述行同步信号的扫描线在 所述显示面板上的正投影与接收触控驱动信号的触控驱动信号线在所述显示面板上的正投影不重叠。
优选地，在任意时刻，接收所述行同步信号的扫描线在所述显示面板上的正投影与接收所述触控驱动信号的触控驱动信号线在所述显示面板上的正投影均不重叠。
优选地，所述触控驱动信号的频率大于所述行同步信号的频率。
优选地，向所述显示面板的多条扫描线提供行同步信号的步骤和向所述触摸面板的多条触控驱动信号线提供触控驱动信号的步骤同时进行。
优选地，所述驱动方法还包括：
在显示一帧图像结束前的预定时刻停止向所述显示面板的多条扫描线提供行同步信号的步骤并停止向所述触摸面板的多条触控驱动信号线提供触控驱动信号的步骤；
监测所述显示面板的噪声。
优选地，所述驱动方法还包括：
根据监测所述显示面板的噪声的步骤中获得的显示面板的噪声调节所述触控驱动信号的猝发频率，直至所述触控驱动信号避开所述噪声为止。
优选地，从第N行开始扫描所述触控驱动信号线至最后一行，然后从第一行所述扫描线开始朝向第N-1行所述扫描线进行扫描，其中N大于1。
优选地，所述驱动方法还包括：
在向所述显示面板的第一根扫描线提供行同步信号的同时向所述显示面板的多条数据线提供场同步信号；
在向所述显示面板的第一根扫描线提供行同步信号的同时向所述所述触摸面板的触摸面板驱动电路提供同步控制信号；
其中，在所述触摸面板的触摸面板驱动电路接收到所述同步控制信号的同时，执行向所述触摸面板的多条触控驱动信号线提供触控驱动信号的步骤。
作为本发明的另一个方面，提供一种显示装置，所述显示装置 包括显示面板、触摸面板、显示面板驱动电路和触摸面板驱动电路，所述显示面板包括多条扫描线，所述触摸面板包括多条触控驱动信号线，所述显示面板驱动电路包括用于依次向多条所述扫描线提供行同步信号的行同步信号生成模块，所述触摸面板驱动电路包括向多条所述触控驱动信号线提供触控驱动信号的触控驱动信号生成模块；
其中，所述显示面板驱动电路提供的所述行同步信号以及所述触摸面板驱动电路提供的所述触控驱动信号满足如下条件：至少在预定时间段内，接收所述行同步信号的扫描线在所述显示面板上的正投影与接收所述触控驱动信号的触控驱动信号线在所述显示面板上的正投影不重叠。
优选地，所述显示面板驱动电路提供的所述行同步信号以及所述触摸面板驱动电路提供的所述触控驱动信号还可以满足如下条件：在任意时刻，接收所述行同步信号的扫描线在所述显示面板上的正投影与接收所述触控驱动信号的触控驱动信号线在所述显示面板上的正投影均不重叠。
优选地，所述触控驱动信号线的宽度是所述显示面板的像素宽度的整数倍。
优选地，所述显示面板包括多条数据线，所述显示面板驱动电路还包括场同步信号生成模块和同步控制信号生成模块，所述场同步信号生成模块用于向所述数据线提供场同步信号，在显示一帧图像时，所述同步控制信号生成模块用于在所述行同步信号生成模块向第一根扫描线提供行同步信号的同时向所述触摸面板驱动电路的触控驱动信号生成模块提供同步控制信号，所述触控驱动信号生成模块接收到所述同步控制信号的同时生成所述触控驱动信号。
优选地，所述行同步信号发生模块能够在显示一帧图像结束前的预定时刻停止向所述显示面板的多条扫描线提供行同步信号，所述触控驱动信号发生模块能够在显示一帧图像结束前的预定时刻停止向所述触摸面板的多条触控驱动信号线提供触控驱动信号，所述触摸面板还包括噪声监测模块，所述噪声监测模块用于监测所述显示面板的噪声。
优选地，所述触控信号驱动电路还包括第一反馈信号生成模块，该第一反馈信号生成模块能够在所述触摸面板驱动电路停止向多条所述触控驱动信号线提供触控驱动信号时向所述显示面板驱动电路发出第一反馈信号，所述显示面板驱动电路能够在接收到所述第一反馈信号的同时停止输出所述行同步信号。
优选地，所述噪声监测模块包括触控感应电极，所述触摸面板驱动电路还包括信号监测模块，所述触控感应电极与所述信号监测模块相连，所述触控感应电极能够与所述触控驱动信号线形成电容，所述信号监测模块与所述触控感应电极相连，以监测所述触控感应电极输出的信号的变化。
优选地，所述触摸驱动电路板还包括猝发频率调节模块，所述猝发频率调节模块能够接收所述噪声监测模块监测到的监测结果，且所述猝发频率调节模块用于调节所述触控驱动信号的猝发频率，直至所述触控驱动信号避开所述噪声为止。
优选地，所述触摸面板驱动电路还包括第二反馈信号生成模块，该第二反馈信号生成模块用于在显示一帧图像结束时向所述显示面板驱动电路发出第二反馈信号，所述显示面板驱动电路接收到所述第二反馈信号后能够控制所述行同步信号发生模块继续发出行同步信号。
在本发明中，当所述显示装置在预定时间段内显示画面时，接收行同步信号HSYNC的扫描线与正在接收触控驱动信号Tx的触控驱动信号线的位置是错开的，因此，接收行同步信号HSYNC的扫描线与正在接收触控驱动信号Tx的触控驱动信号线之间几乎不产生电容耦合，从而提高了触摸面板在上述预定时刻内的信噪比。
附图说明
本发明的所附附图是用来提供对本发明的进一步理解，并且是构成说明书的一部分，与下面的具体实施方式一起仅仅用于解释本发明，并不构成对本发明的限制。在附图中：
图1是展示本发明所提供的驱动方法中各个信号的时序图；
图2是展示本发明所提供的驱动方法的扫描持续示意图；
图3是本发明所提供的显示装置的模块示意图；
图4是展示触控驱动信号线的宽度与像素的宽度之间的关系示意图。
附图标记说明
100：显示面板              110：扫描线
120：数据线                200：显示面板驱动电路
210：行同步信号生成模块     220：场同步信号生成模块
230：同步控制信号生成模块   300：触摸面板
310：触控驱动信号线         320：触控感应电极
400：触摸面板驱动电路       410：触控驱动信号生成模块
420：第一反馈信号生成模块    430：信号监测模块
440：第二反馈信号生成模块    450：猝发频率调节模块
具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
本发明的发明人对现有技术中的集成式显示装置的噪声进行了监测。所述显示装置包括显示面板和设置在显示面板上的触摸面板。显示面板为液晶面板，触摸面板包括触控驱动信号线和触控感应电极。
触控驱动信号线可以与相对应的触控感应电极形成电容，当依次向多条触控驱动信号线提供触控驱动信号时，接收到触控驱动信号的触控驱动信号线与相应的触控感应电极耦合，使得该触控感应电极内产生原始信号(raw data)。
首先，在显示面板关闭情况下，本发明的发明人利用仪器对触摸面板的触控感应电极内的原始信号进行监测。这种情况下，触摸面板的触控感应电极能够输出正常的原始信号，即触控感应电极正常工 作。此处所述的原始信号是指没有触摸的情况下触控感应电极输出的信号。随后，在显示面板开启的状况下，本发明的发明人利用仪器对触摸面板的触控感应电极内的原始信号(raw data)进行监测。在这种情况下，触控感应电极输出的信号不再是原始信号。触控感应电极输出的信号的波形包括两部分：一部分是周期性出现的波峰，另一部分是始终出现的稳定信号。该稳定信号的信号值不同于原始信号的信号值。
经本发明的发明人研究发现，由于所述触摸面板设置在所述显示面板上，因此，触摸面板上的触控驱动信号线覆盖显示面板上的扫描线，在显示面板打开的情况下，当触控驱动信号线以及该触控驱动信号线覆盖的扫描线同时接收信号时，扫描线与相应的触控驱动信号线之间必然形成电容耦合(即，噪声)，从而影响触控点位置的确定。显示面板的扫描线的每次扫描刷新都会与触控驱动信号线产生较大的耦合电容(该耦合电容对应于监测到的周期性出现的峰值)，从而改变触控驱动电极的电信号，进而改变了与触控驱动信号线对应的触控感应电极中产生的电信号。
此外，显示面板在进行显示时，该显示面板还存在液晶电容，该液晶电容会对而触控驱动信号线造成影响(即，液晶电容也改变了触控驱动信号线内的电信号)，使得触控感应电极输出不同于原始信号的信号值。
为了至少部分克服扫描刷新时耦合电容对触控驱动信号线的影响，作为本发明的一个方面，提供一种显示装置的驱动方法，所述显示装置包括显示面板和设置在显示面板上的触摸面板，换言之，本发明提供一种适用于包括集成式的触摸面板的显示装置的驱动方法。如上文中所述，所述显示面板包括多条扫描线，所述触摸面板包括多条触控驱动信号线。具体地，所述驱动方法包括：
向所述显示面板的多条扫描线提供行同步信号HSYNC；
向所述触摸面板的多条触控驱动信号线提供触控驱动信号Tx；
其中，至少在预定时间段内，接收行同步信号HSYNC的扫描线在所述显示面板上的正投影与接收触控驱动信号Tx的触控驱动信号 线在所述显示面板上的正投影不重叠。
在本发明中，当所述显示装置在预定时间段内显示画面时，由于接收行同步信号HSYNC的扫描线在所述显示面板上的正投影与接收触控驱动信号Tx的触控驱动信号线在所述显示面板上的正投影不重叠，所以接收行同步信号HSYNC的扫描线与正在接收触控驱动信号Tx的触控驱动信号线的位置是错开的。因此，接收行同步信号HSYNC的扫描线与正在接收触控驱动信号Tx的触控驱动信号线之间几乎不产生电容耦合，所以，触控驱动信号线中的电信号也几乎不会受到影响，从而提高了触摸面板在上述预定时间段内的信噪比。
为了提高所述触摸面板在整个显示过程中的信噪比，优选地，在任意时刻，接收行同步信号HSYNC的扫描线在所述显示面板上的正投影与接收所述触控驱动信号Tx的触控驱动信号线在所述显示面板上的正投影均不重叠。即，在所述显示面板显示图像的任意时刻，正在接收行同步信号HSYNC的扫描线均与正在接收触控驱动信号Tx的触控驱动信号线错开，所以，显示图像的任意时刻，扫描线与触控驱动信号线之间的耦合电容均较小，从而使得所述触摸面板在显示图像的任意时刻具有较高的信噪比。
所述显示面板上的多条数据线和多条扫描线将所述显示面板划分为多个像素单元，多个像素单元排列为多行多列，每条扫描线对应一行像素单元。为了节约制造成本，设置触摸面板上的触控驱动信号线的宽度使得该触控驱动信号线可以覆盖多行像素单元。例如，对于分辨率为1280×720的显示装置，触控驱动信号线的宽度可以设置为像素单元宽度的107倍。即，一行触控驱动信号线覆盖107行像素单元。相应地，触控驱动信号Tx的脉冲宽度可以设置为行同步信号HSYNC脉冲宽度的107倍。当然，本发明并不限于此，只要能够确保精确地确定触控点的位置，触控驱动信号线的宽度可以是像素单元宽度的任意整数倍。
为了保证触摸信号不失真，优选地，如图1所示，触控驱动信号Tx的频率可以大于显示面板的扫描频率。通常，显示面板的扫描频率为60Hz，触控驱动信号Tx的扫描频率可以设置为120Hz。
为了便于操作，优选地，如图1所示，向所述显示面板的多条扫描线提供行同步信号HSYNC的步骤和向所述触摸面板的多条触控驱动信号线提供触控驱动信号Tx的步骤同时进行。
在所述显示装置中，除了扫描线与触控驱动信号线之间的耦合电容会对触摸面板造成影响之外，显示面板中的液晶电容(未示出)也会对触摸面板造成影响。为了减小显示面板中的液晶电容对触摸面板的影响，优选地，所述驱动方法还可以包括：
在显示一帧图像结束前的预定时刻停止向所述显示面板的多条扫描线提供行同步信号HSYNC的步骤并停止向所述触摸面板的多条触控驱动信号线提供触控驱动信号Tx的步骤；并监测所述显示面板的噪声。
在本发明所提供的驱动方法中，将显示一帧图像的时间分为两部分：一部分为显示时间段，另一部分为噪声监测时间段。在监测噪声的时间段内不显示图像，只监测液晶电容产生的噪声，从而可以准确地获得液晶电容产生的噪声的频率、大小等参数。监测噪声的方法是本领域所公知的，这里不再赘述。
监测到所述显示面板的噪声之后，可以对所述触控驱动信号Tx进行跳频调节，以避开噪声。具体地：根据监测所述显示面板的噪声的步骤中获得的显示面板的噪声调节所述触控驱动信号Tx的猝发(burst)频率，直至所述触控驱动信号Tx避开所述噪声为止。即，可以将触控驱动信号Tx的猝发频率调节为与噪声信号错开，使得噪声不会对触控驱动信号线中的触控驱动信号Tx造成影响，从而不会对触控感应电极与触控驱动信号线互相耦合产生的触摸感应信号造成影响，进而可以更加稳定地确定触摸点的位置坐标。
上述步骤仅仅是显示一帧图像时所需要进行的步骤，在显示下一帧图像时，重复上述步骤。
为了尽量减小扫描线上的行同步信号HSYNC对触控驱动信号Tx的影响，优选地，在同一时刻，接收到行同步信号HSYNC的扫描线，应当尽量远离接收到触控驱动信号Tx的触控驱动信号线。通常，从第一行扫描线开始对显示面板的多条扫描线进行逐一扫描，优 选地，如图2所示，可以从第N行开始扫描所述触控驱动信号线至最后一行，然后再从第一行所述扫描线开始朝向第N-1行所述扫描线进行扫描。此处，N大于1。
图2是本发明的驱动方法的扫描持续示意图，其中的斜实线代表的是行同步信号HYSNC从第一组像素开始对扫描线进行逐行扫描，斜实线的斜率代表行同步信号HYSNC的扫描速率，中心点划线代表的是触控驱动信号Tx对触控驱动信号线进行逐行扫描，中心点划线的斜率代表触控驱动信号Tx的扫描速率。
如图2中所示，每行触控驱动信号线对应例如107行像素。第1组像素为第1行至第107行像素，第2组像素为第108行至第214行像素，依次类推，第11组像素为第1071行至第1177行像素，第12组像素为第1178行至第1280行像素。容易理解的是，最后一组像素的行数少于其他组的像素。
显示面板从第1组像素进行扫描时，为了避开显示面板的扫描，触摸面板从第4行触控驱动信号线开始扫描。但是扫描至第9行触控驱动信号线时，如果不改变扫描触控驱动信号线的顺序，该第9行触控驱动信号线则会覆盖正在扫描的像素(即，覆盖正在扫描的信号线)，因此，此时不再扫描第9行触控驱动信号线，而是对第10行触控驱动信号线进行扫描。对第10行触控驱动信号线扫描完毕后，继续对第9行触控驱动信号线进行回归扫描。扫描完第9行触控驱动信号线之后，依次扫描第11行触控信号驱动线和第12行触控驱动信号线，随后再逐行扫描第1行触控信号驱动线至第3行触控信号驱动线。至此，完成了对所有触控信号驱动线的扫描。
另外，本领域技术人员还应当理解的是，为了实现显示装置的正常显示，所述驱动方法还包括在向显示面板的第一根扫描线提供行同步信号HSYNC的同时向显示面板的数据线提供列同步信号VSYNC，该列同步信号VSYNC为脉冲信号，每显示一帧图像对应一个列同步信号VSYNC。
为了便于控制行同步信号HSYNC与所述触控驱动信号Tx的时序，优选地，所述驱动方法还包括：
在向所述显示面板的第一根扫描线提供行同步信号HSYNC的同时向所述所述触摸面板的触摸面板驱动电路提供同步控制信号SYNC；
其中，在所述触摸面板的触摸面板驱动电路接收到所述同步控制信号SYNC的同时，执行向所述触摸面板的多条触控驱动信号线提供触控驱动信号Tx的步骤。
提供同步控制信号SYNC的目的在于，可以使得行同步信号HSYNC与触控驱动信号Tx同时发出，以便于在后续的过程中控制行同步信号HSYNC和触控驱动信号Tx的时序。
作为本发明的另一个方面，提供一种显示装置，可以利用上述方法驱动所述显示装置。如图3中所示，所述显示装置包括显示面板100、触摸面板300、显示面板驱动电路200和触摸面板驱动电路400，显示面板100包括多条扫描线110，触摸面板300包括多条触控驱动信号线310，显示面板驱动电路200包括用于依次向多条扫描线110提供行同步信号HSYNC的行同步信号生成模块210，触摸面板驱动电路400包括向多条触控驱动信号线310提供触控驱动信号Tx的触控驱动信号生成模块410，其中，所述显示面板驱动电路200提供的所述行同步信号HSYNC以及所述触摸面板驱动电路400提供的所述触控驱动信号Tx满足如下条件：至少在预定时间段内，接收所述行同步信号HSYNC的扫描线110在所述显示面板100上的正投影与接收所述触控驱动信号Tx的触控驱动信号线310在所述显示面板100上的正投影不重叠。
如上文中所述，至少在预定时间段内，接收行同步信号HSYNC的扫描线110与接收触控驱动信号Tx的触控驱动信号线310互相错开，从而降低了扫描线110与触控驱动信号线310之间的耦合电容，有利于提高触摸面板300的信噪比，从而可以精确地确定触摸点的位置坐标。
为了提高所述触摸面板300在整个显示过程中的信噪比，优选地，在所述显示面板驱动电路200提供的所述行同步信号HSYNC以及所述触摸面板驱动电路400提供的所述触控驱动信号Tx满足如下 条件：在任意时刻，接收所述行同步信号HSYNC的扫描线110在所述显示面板100上的正投影与接收所述触控驱动信号Tx的触控驱动信号线310在所述显示面板100上的正投影均不重叠。
如上文中所述，为了节约制造成本，优选地，在本发明所提供的显示装置中，所述触控驱动信号线310的宽度可以是所述显示面板100的像素宽度的整数倍。容易理解的是，可以利用透明电极材料制造触控驱动信号线310。
图4是展示触控驱动信号线的宽度与像素的宽度之间的关系的示意图，其中实线表示的是触控驱动信号线310的轮廓，虚线表示的是像素单元的轮廓。从图4中可以看到，每个触控驱动信号线310的宽度是每行像素的宽度的两倍。当然，图4只是为了说明触控驱动信号线310的宽度大于像素的宽度，并不代表实际制造显示装置时只可以将触控驱动信号线310的宽度设置为像素宽度的两倍。如上文中所述，在分辨率为1280×720的显示装置，触控驱动信号线310的宽度可以为像素单元宽度的107倍。
容易理解的是，所述显示面板100包括多条数据线120，所述显示面板驱动电路200还包括用于向数据线120提供场同步信号VSYNC的场同步信号生成模块220。数据线120接收到场同步信号VSYNC意味着一帧图像的开始。
如上文中所述，触控驱动信号Tx与行同步信号HSYNC同步形成，为了实现这一目的，显示面板驱动电路200还可以包括向触摸面板驱动电路400的触控驱动信号生成模块410提供同步控制信号SYNC的同步控制信号生成模块230。在显示一帧图像时，同步控制信号生成模块230在行同步信号生成模块210向第一根扫描线提供行同步信号HSYNC的同时向触控驱动信号生成模块410提供同步控制信号SYNC，触控驱动信号生成模块410接收到同步控制信号SYNC的同时生成触控驱动信号Tx。所述同步控制信号SYNC与显示一帧图像时的第一个行同步信号HSYNC同步生成，从而便于控制扫描信号以及触控驱动信号Tx的时序。
为了消除显示面板100的液晶电容对触摸面板300的影响，优 选地，行同步信号发生模块210能够在显示一帧图像结束前的预定时刻停止向显示面板100的多条扫描线110提供行同步信号HSYNC，触控驱动信号发生模块410能够在显示一帧图像结束前的预定时刻停止向触摸面板300的多条触控驱动信号线310提供触控驱动信号Tx。此时，触摸面板300还包括噪声监测模块(未示出)，该噪声监测模块用于监测显示面板100的噪声。此处，显示面板100的噪声是指显示面板100的液晶电容对触摸面板300的触控感应电极320中的感应到的信号造成的影响。
在本发明中，可以通过多种方式消除液晶电容对触摸面板300中的触控感应电极320造成的影响。而噪声监测模块也可以具有多种形式。
作为本发明的一种具体实施方式，优选地，所述噪声监测模块包括触控感应电极320，所述触摸面板驱动电路400还包括信号监测模块430，触控感应电极320与信号监测模块430相连，触控感应电极320可以与触控驱动信号线310形成电容，信号监测模块430与触控感应电极320相连，以监测触控感应电极320输出的信号的变化。
容易理解的是，此处噪声监测模块的触控感应电极320是触摸面板300的触控感应电极，除了用于监测噪声之外，触控感应电极320还用于监测人手触摸在所述触摸面板300上时引起的触控感应电极320和触控驱动信号线310之间的电容变化。将触控感应电极320用作噪声监测模块的一部分有利于简化显示装置的结构。
如上文中所述，将显示一帧图像的时间分为两部分，一部分是显示时间段，另一部分为噪声监测时间段。为了确保在噪声监测时间段内，能够同时停止触控驱动信号Tx、行同步信号HSYNC和场同步信号VSYNC，优选地，触摸面板驱动电路400还可以包括第一反馈信号生成模块420，该第一反馈信号生成模块420能够在所述触摸面板驱动电路400停止向多条所述触控驱动信号线310提供触控驱动信号Tx时向显示面板驱动电路200(具体地，显示面板驱动电路200的行同步信号生成模块210)发出第一反馈信号TEND1，显示面板驱动电路200(具体地，显示面板驱动电路200的行同步信号生成模 块210)可以在接收到所述第一反馈信号TEND1的同时停止输出行同步信号HSYNC。
如上文中所述，监测所述显示面板100的液晶电容对所述触摸面板300产生的噪声的目的在于降低甚至消除所述液晶电容对触摸面板300的影响，下面介绍具体如何降低甚至消除所述液晶电容对触摸面板300的影响。为了实现上述目的，可对触摸驱动电路的触控驱动信号Tx进行跳频调节。具体地，所述触摸驱动电路400还包括猝发频率调节模块450，该猝发频率调节模块450可以接收所述噪声监测模块监测到的监测结果，且所述猝发频率调节模块450用于调节所述触控驱动信号Tx的猝发频率，直至所述触控驱动信号Tx避开所述噪声为止。在本发明中，可以利用信号监测模块430获取所述噪声监测模块监测到的监测结果，并利用所述信号监测模块430将监测结果发送至所述猝发频率调节模块450。
在一帧图像显示结束后，显示装置会继续显示下一帧图像，以显示连续的图像。为了实现图像的连续显示，优选地，所述触摸面板驱动电路400还可以包括第二反馈信号生成模块440，该第二反馈信号生成模块440用于在显示一帧图像结束时向所述显示面板驱动电路200(具体地，所述显示面板驱动电路200的行同步信号生成模块210)发出第二反馈信号TEND2，所述显示面板驱动电路200(具体地，所述显示面板驱动电路200的行同步信号生成模块210)接收到所述第二反馈信号TEND2后能够控制行同步信号生成模块210继续发出行同步信号HSYNC。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。

Claims (17)

  1. 一种显示装置的驱动方法，该显示装置包括显示面板和触摸面板，该驱动方法包括：
    向所述显示面板的多条扫描线提供行同步信号；
    向所述触摸面板的多条触控驱动信号线提供触控驱动信号；
    其特征在于，至少在预定时间段内，接收所述行同步信号的扫描线在所述显示面板上的正投影与接收触控驱动信号的触控驱动信号线在所述显示面板上的正投影不重叠。
  2. 根据权利要求1所述的显示装置的驱动方法，其特征在于，
    在任意时刻，接收所述行同步信号的扫描线在所述显示面板上的正投影与接收所述触控驱动信号的触控驱动信号线在所述显示面板上的正投影均不重叠。
  3. 根据权利要求1所述的显示装置的驱动方法，其特征在于，
    所述触控驱动信号的频率大于所述行同步信号的频率。
  4. 根据权利要求1所述的显示装置的驱动方法，其特征在于，
    向所述显示面板的多条扫描线提供行同步信号的步骤和向所述触摸面板的多条触控驱动信号线提供触控驱动信号的步骤同时进行。
  5. 根据权利要求1所述的显示装置的驱动方法，其特征在于，
    所述驱动方法还包括：
    在显示一帧图像结束前的预定时刻停止向所述显示面板的多条扫描线提供行同步信号的步骤并停止向所述触摸面板的多条触控驱动信号线提供触控驱动信号的步骤；
    监测所述显示面板的噪声。
  6. 根据权利要求5所述的显示装置的驱动方法，其特征在于，
    所述驱动方法还包括：
    根据监测所述显示面板的噪声的步骤中获得的显示面板的噪声调节所述触控驱动信号的猝发频率，直至所述触控驱动信号避开所述噪声为止。
  7. 根据权利要求1至6中任意一项所述的显示装置的驱动方法，
    其特征在于，从第N行开始扫描所述触控驱动信号线至最后一行，然后从第一行所述扫描线开始朝向第N-1行所述扫描线进行扫描，其中N大于1。
  8. 根据权利要求1至6中任意一项所述的显示装置的驱动方法，其特征在于，
    所述驱动方法还包括：
    在向所述显示面板的第一根扫描线提供行同步信号的同时向所述显示面板的多条数据线提供场同步信号；
    在向所述显示面板的第一根扫描线提供行同步信号的同时向所述所述触摸面板的触摸面板驱动电路提供同步控制信号；
    其中，在所述触摸面板的触摸面板驱动电路接收到所述同步控制信号的同时，执行向所述触摸面板的多条触控驱动信号线提供触控驱动信号的步骤。
  9. 一种显示装置，所述显示装置包括显示面板、触摸面板、显示面板驱动电路和触摸面板驱动电路，其特征在于，
    所述显示面板包括多条扫描线，所述触摸面板包括多条触控驱动信号线，所述显示面板驱动电路包括用于依次向多条所述扫描线提供行同步信号的行同步信号生成模块，所述触摸面板驱动电路包括向多条所述触控驱动信号线提供触控驱动信号的触控驱动信号生成模块，其中，
    所述显示面板驱动电路提供的所述行同步信号以及所述触摸面板驱动电路提供的所述触控驱动信号满足如下条件：至少在预定时间 段内，接收所述行同步信号的扫描线在所述显示面板上的正投影与接收所述触控驱动信号的触控驱动信号线在所述显示面板上的正投影不重叠。
  10. 根据权利要求9所述的显示装置，其特征在于，
    所述显示面板驱动电路提供的所述行同步信号以及所述触摸面板驱动电路提供的所述触控驱动信号还满足如下条件：
    在任意时刻，接收所述行同步信号的扫描线在所述显示面板上的正投影与接收所述触控驱动信号的触控驱动信号线在所述显示面板上的正投影均不重叠。
  11. 根据权利要求9所述的显示装置，其特征在于，
    所述触控驱动信号线的宽度是所述显示面板的像素宽度的整数倍。
  12. 根据权利要求9所述的显示装置，其特征在于，
    所述显示面板包括多条数据线，所述显示面板驱动电路还包括场同步信号生成模块和同步控制信号生成模块，
    所述场同步信号生成模块用于向所述数据线提供场同步信号，在显示一帧图像时，所述同步控制信号生成模块用于在所述行同步信号生成模块向第一根扫描线提供行同步信号的同时向所述触摸面板驱动电路的触控驱动信号生成模块提供同步控制信号，
    所述触控驱动信号生成模块接收到所述同步控制信号的同时生成所述触控驱动信号。
  13. 根据权利要求9所述的显示装置，其特征在于，
    所述行同步信号发生模块能够在显示一帧图像结束前的预定时刻停止向所述显示面板的多条扫描线提供行同步信号，
    所述触控驱动信号发生模块能够在显示一帧图像结束前的预定时刻停止向所述触摸面板的多条触控驱动信号线提供触控驱动信号，
    所述触摸面板还包括噪声监测模块，所述噪声监测模块用于监测所述显示面板的噪声。
  14. 根据权利要求13所述的显示装置，其特征在于，
    所述触控信号驱动电路还包括第一反馈信号生成模块，该第一反馈信号生成模块能够在所述触摸面板驱动电路停止向多条所述触控驱动信号线提供触控驱动信号时向所述显示面板驱动电路发出第一反馈信号，
    所述显示面板驱动电路能够在接收到所述第一反馈信号的同时停止输出所述行同步信号。
  15. 根据权利要求13所述的显示装置，其特征在于，
    所述噪声监测模块包括触控感应电极，
    所述触摸面板驱动电路还包括信号监测模块，
    所述触控感应电极与所述信号监测模块相连，
    所述触控感应电极能够与所述触控驱动信号线形成电容，
    所述信号监测模块与所述触控感应电极相连，以监测所述触控感应电极输出的信号的变化。
  16. 根据权利要求13所述的显示装置，其特征在于，
    所述触摸驱动电路板还包括猝发频率调节模块，所述猝发频率调节模块能够接收所述噪声监测模块监测到的监测结果，且所述猝发频率调节模块用于调节所述触控驱动信号的猝发频率，直至所述触控驱动信号避开所述噪声为止。
  17. 根据权利要求13所述的显示装置，其特征在于，
    所述触摸面板驱动电路还包括第二反馈信号生成模块，该第二反馈信号生成模块用于在显示一帧图像结束时向所述显示面板驱动电路发出第二反馈信号，所述显示面板驱动电路接收到所述第二反馈信号后能够控制所述行同步信号发生模块继续发出行同步信号。
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