WO2011003253A1 - 一种触控式平板显示器 - Google Patents

一种触控式平板显示器 Download PDF

Info

Publication number
WO2011003253A1
WO2011003253A1 PCT/CN2009/075272 CN2009075272W WO2011003253A1 WO 2011003253 A1 WO2011003253 A1 WO 2011003253A1 CN 2009075272 W CN2009075272 W CN 2009075272W WO 2011003253 A1 WO2011003253 A1 WO 2011003253A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch
display
circuit
signal
electrode
Prior art date
Application number
PCT/CN2009/075272
Other languages
English (en)
French (fr)
Inventor
陈其良
刘海平
Original Assignee
智点科技（深圳）有限公司
智点科技有限公司
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.)
Filing date
Publication date
Application filed by 智点科技（深圳）有限公司, 智点科技有限公司 filed Critical 智点科技（深圳）有限公司
Priority to JP2012518725A priority Critical patent/JP2012532389A/ja
Priority to EP09847004A priority patent/EP2453339A1/en
Publication of WO2011003253A1 publication Critical patent/WO2011003253A1/zh
Priority to US13/343,414 priority patent/US20120098776A1/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Definitions

  • the present invention relates to a touch screen and a flat panel display, and more particularly to a touch panel display. Background technique
  • the invention patent specification of the touch panel display discloses a connection manner between the touch circuit and the display electrode, and the display display electrode or the transmission display driving signal is transmitted through the analog switch, or transmitted. Sensing touch signals, display driving and touch detection time division multiplexing display electrodes, display electrodes are used for both display driving and touch detection.
  • the invention patent specification of the flat panel display with the touch function of 2006101065583 discloses another connection manner between the touch circuit and the display screen electrode, and the display electrode is simultaneously transmitted to display the display driving signal through the signal loading circuit. And transmitting and sensing the touch signal, the display drive and the touch detection share the display electrode at the same time, and the display electrode is used for both the display drive and the touch detection.
  • the disclosed method combines the display screen and the touch screen into one.
  • the invention patent specification of the application number 200810133417X which is a touch panel display, discloses a method for applying a touch excitation signal to the display electrode line, by simultaneously connecting different electrode lines of the display screen to the touch excitation source.
  • the invention is to establish a circuit structure relationship between the touch circuit and the display driving circuit and the display screen, and realize the simple and reasonable connection of the touch excitation and the display driving and the display electrode line, so that the different electrode lines of the display screen are simultaneously connected to the touch excitation source. Simultaneously applying touch excitation to different display electrode lines, controlling the flow direction of the touch signal in the display screen, reducing the crosstalk of the touch signal between different electrode lines of the display screen, and effectively detecting and accurately positioning the touch.
  • the technical problem of the present invention is solved by the following technical solutions:
  • a touch panel display comprises a display screen and a driving circuit, and the driving circuit further comprises a display driving circuit and a touch circuit.
  • the display driving circuit has a display driving source for providing display driving energy and a display strobe output circuit.
  • Each output end of the display strobe output circuit in the display driving circuit is respectively connected to the input end of each unit of the display/touch signal strobe output circuit or the display/touch signal loading circuit, the signal display/touch strobe circuit or display/ The output ends of each unit of the touch signal loading circuit are respectively connected to the electrode lines of the display screen.
  • Each unit of the display/touch signal strobe output circuit or the display/touch signal loading circuit is connected to the touch excitation source through one or more circuit paths, the display/touch signal strobe output circuit or the display/touch signal loading circuit Allowing more than two display electrode lines to simultaneously connect the touch excitation source for providing touch excitation energy, and the touch circuit detects the change of the touch signal on the circuit path connecting the touch excitation source to each electrode line of the display screen by time-sharing Whether the position of each display electrode line is touched.
  • the display/touch signal strobe output circuit or the display/touch signal loading circuit unit for connecting the display electrode line to the touch excitation source is connected through a circuit path.
  • the excitation source determines whether the display/touch signal strobe output circuit or the display/touch signal loading circuit unit is connected to the touch signal on the touch excitation source path to determine the display of the strobe touch excitation source Whether the position of the electrode wire is touched.
  • the display/touch signal strobe output circuit or the display/touch signal loading circuit unit for connecting the display electrode line to the touch excitation source is performed by not less than two circuit paths.
  • the touch circuit detects the change of the touch signal on at least one of the plurality of paths of the touch excitation source by detecting the display/touch signal strobe output circuit or the display/touch signal loading circuit unit It is judged whether the position of the display electrode line of the gate touch excitation source is touched.
  • the display/touch signal strobe output circuit or the display/touch signal loading circuit unit is not less than two paths connecting the touch excitation sources, and is selected by the strobe circuit. Connected.
  • the touch circuit detects a detection point of the touch signal, and is disposed at a connection path of the touch excitation source and the display/touch signal strobe output circuit or the display/touch signal loading circuit unit. Upper, or set on the connection path of the display/touch signal strobe output circuit or the display/touch signal loading circuit unit and the display electrode line.
  • the detection point of the detection touch signal is a potential point or component for detecting a change of the touch signal.
  • the gating circuit can be an analog switch or other strobing circuit.
  • the touch signal detecting circuit of the touch circuit is a passive component, or an active component, or a circuit component composed of multiple components.
  • the touch circuit detects a touch signal connected to at least one of the plurality of paths of the touch excitation source, and detects at least one of a current signal and a voltage signal.
  • the touch circuit detects a touch signal on at least one of the plurality of paths connected to the touch excitation source, and detects the amplitude, the time, the phase, the frequency signal, and the pulse number. At least one.
  • the touch excitation source connecting the electrode lines of the display screen may be the same output end of the same touch excitation source, or may be different output ends of the same touch excitation source, or It is a different source of touch excitation.
  • the touch excitation source is an AC power source or an AC/DC hybrid power source
  • the output waveform may be a square wave, a sine wave, a square wave or a sine wave, and a direct current.
  • Superimposed waves can also be other waveforms.
  • the frequency of the touch signal outputted by the driving circuit to the display electrode line through the display/touch signal strobe output circuit or the display/touch signal signal loading circuit is not less than 50K Hz.
  • the beneficial effects of the present invention compared with the prior art are that the disclosed method is a relatively specific circuit structure relationship between the touch circuit and the display driving circuit and the display screen, so that the connection between the touch circuit and the display driving circuit and the display electrode is reasonable.
  • the touch electrodes can be simultaneously connected to different display electrodes to realize the simultaneous application of touch excitation signals to different display electrode lines, control the flow direction of the touch signals in the display screen, and reduce the touch signals on different display lines of the display screen. Inter-crosstalk; It is also possible to detect touch signals flowing through different electrode lines of the display screen by using only a small number of touch circuit units, thereby reducing the size, power consumption and cost of the multi-touch circuit unit.
  • connection between the touch circuit and the display drive circuit and the display electrode is simple and feasible, and even the display drive circuit and the touch circuit can be combined.
  • the judging condition of setting a reasonable touched electrode line allows the touch panel display of the present invention to allow simultaneous multi-touch.
  • FIG. 1 is a schematic diagram of electrical connections according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of electrical connections according to a second embodiment of the present invention.
  • FIG. 3 is a schematic diagram of electrical connections according to a third embodiment of the present invention.
  • FIG. 4 is a schematic diagram of electrical connections according to a fourth embodiment of the present invention.
  • Figure 5 is a schematic diagram of electrical connections according to a fifth embodiment of the present invention
  • Figure 6 is a schematic view showing the electrical connection of a sixth embodiment of the present invention
  • FIG. 7 is a schematic diagram of electrical connections according to a seventh embodiment of the present invention.
  • Figure 8 is a schematic view showing the electrical connection of the eighth embodiment of the present invention.
  • Figure 9 is a schematic view showing the electrical connection of a ninth embodiment of the present invention.
  • Figure 10 is a schematic view showing the electrical connection of a ninth embodiment of the present invention.
  • Figure 11 is a schematic view showing the electrical connection of a ninth embodiment of the present invention.
  • Figure 12 is a schematic view showing the electrical connection of a ninth embodiment of the present invention. difficult
  • LCDs liquid crystal displays
  • TN-LCD Twist Nematic liquid crystal displays
  • STN-LCD Super Twist Nematic liquid crystals
  • the lower substrate glass has a display scan electrode line or a display signal electrode line (ie, a row electrode line)
  • the upper substrate glass has a display signal electrode line or a display scan electrode line (ie, a column electrode line)
  • the intersection is the display pixel.
  • An active liquid crystal display such as a Thin Film Transistor (TFT) liquid crystal display (TFT-LCD) generally includes a TFT array on a substrate glass, a display pixel array, and a display scan electrode connected to the gate of the TFT.
  • a line ie, a row electrode line
  • a display signal electrode line ie, a column electrode line
  • a color filter film and a common electrode on the other substrate glass.
  • Other flat panel displays such as plasma display (PDP), active and passive organic light emitting diode displays (OLEDs), also have display scan electrode lines and display signal electrode lines (i.e., row and column electrode lines).
  • the touch panel display disclosed in the present invention is composed of a display screen and a driving circuit.
  • the driving circuit further includes a display driving circuit and a touch circuit.
  • the output terminals of the driving circuit are respectively connected to the respective electrode lines of the display screen.
  • the touch-sensing circuit connected to the display driving circuit is used for touch detection of the row and column electrode lines of the flat panel display, and the display driving and the touch detection multiplexing the display screen electrodes, so that the flat panel display realizes touch detection while displaying normally.
  • the touch panel display 100 shown in FIG. 1 includes a display screen 110 and a driving circuit 120.
  • the driving circuit 120 includes a control circuit 121, a display driving source 122 for providing display driving energy, a touch excitation source 123 for providing touch excitation energy, a display strobe output circuit 124, a touch circuit 125, and a display/touch signal strobe output. Circuit 126, etc.
  • the display screen 110 has a display row electrode 111, a column electrode 112, and the like.
  • the input end of the display strobe output circuit 124 is connected to the display driving source 122; the output terminals of the display strobe output circuit 124 are respectively connected to the strobe circuit units 1261, 1262, ... of the display/touch signal strobe output circuit 126.
  • each strobe circuit The other input ends of the units 1261, 1262, . . . , 126N are respectively connected to the touch excitation source 123 through the touch signal sampling units 131, 132, . . . 13n of the touch circuit 125; each touch signal sampling unit 131, 132, ..., 13 ⁇ are connected to the touch circuit 125, and the touch circuit 125 detects the change of the touch signal on the sampling unit; the display/touch signal strobe output circuit 126 each of the gate circuit units 1261, 1262, .. The output end of 126n is connected to each electrode line of the display row electrode 111 and the column electrode 112, respectively.
  • the control circuit 121 causes the display/touch signal strobe output circuit 126 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 124 to display the strobe output circuit 124 to the connected display screen row electrode 111.
  • Each of the electrode lines of the column electrode 112 conveys a display driving signal; or is connected to the touch excitation source 123, and the touch excitation source 123 applies a touch excitation signal to each of the connected display row electrode 111 and the column electrode 112.
  • the various connecting lines in Figure 1 do not only represent single-wire connections, but also represent multi-wire connections.
  • the touch panel display described above works as follows:
  • the display/touch signal strobe output circuit 126 in the driving circuit 120 causes the display electrode lines to communicate with the output terminals of the display strobe output circuit 124, and the control circuit 121 causes the display strobe output circuit 124.
  • a display driving signal is transmitted to the connected display row electrode 111 and column electrode 112, and the display screen 110 is in a display driving state.
  • the control circuit 121 causes the display/touch signal to strobe the output circuit 126 so that the display electrode lines pass through the touch signal sampling units 131, 132, ..., 13n and the touch excitation source 123, respectively.
  • the touch excitation source 123 simultaneously applies a touch excitation signal to each electrode line of the display row electrode 111 and the column electrode 112.
  • the touch control circuit 125 determines whether the display screen 110 is touched and the positions of the row and column electrode lines are touched by detecting changes in the touch signals on the touch signal sampling units 131, 132, ..., 13n, and the display screen 110 is at Touch detection status. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 100 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplexing display electrodes form a touch panel display that can be displayed and touched.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the display/touch signal strobe output circuit for connecting the display electrode or the display driving circuit to transmit the display driving signal or the touch circuit to transmit the touch signal may be a multi-channel analog switch, or may be another strobe The circuit of action.
  • the touch signal sampling unit can be a single resistor or a passive device of capacitance or inductance, or can be multiple passive
  • the combination of devices can also be a single active device or a circuit unit with active devices. Specific embodiment 2
  • the touch panel display 200 shown in FIG. 2 includes a display screen 210 and a driving circuit 220.
  • the driving circuit 220 includes a control circuit 221, a display driving source 222 for providing display driving energy, a touch excitation source 223 for providing touch excitation energy, a display gate output circuit 224, a touch circuit 225, and a display composed of the analog switch group 226. I touch signal strobe output circuit and so on.
  • the display screen 210 has a display row electrode 211, a column electrode 212, and the like.
  • the input terminal of the display strobe output circuit 224 is connected to the display driving source 222; the output terminals of the display strobe output circuit 224 are respectively connected to one input terminal of each analog switch of the analog switch group 226; the other input of each analog switch of the analog switch group 226
  • the terminals are respectively connected to the touch excitation source 223; the output terminals of the analog switches of the analog switch group 226 are respectively connected to the electrode lines of the display row electrode 211 and the column electrode 212.
  • the touch signal detection points 231, 232, ..., 23n corresponding to the touch circuits 225 of the display electrode lines are respectively provided.
  • the control circuit 225, the touch circuit 225 detects a change in the potential of the touch signal detection point; the reference end point of the potential measurement may be located at a common ground end of the drive circuit 220, or may be set at a specific reference point of the drive circuit 220. .
  • the control circuit 221 causes the analog switch group 226 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 224 to display the strobe output circuit 224 to the electrodes of the connected display panel row electrode 211 and column electrode 212.
  • the line conveys the display driving signal; or communicates with the touch excitation source 223, and the touch excitation source 223 applies a touch excitation signal to the connected electrode lines of the display screen row electrode 211 and the column electrode 212.
  • Each of the connecting lines in FIG. 2 does not only represent a single-wire connection, but also represents a multi-wire connection relationship.
  • the touch panel display operates as follows - during the display driving period, the analog switch group 226 in the driving circuit 220 causes the display electrode lines to communicate with the output terminals of the display strobe output circuit 224, and the control circuit 221 causes the display
  • the gate output circuit 224 supplies a display driving signal to the connected display panel row electrode 211 and column electrode 212, and the display screen 210 is in a display driving state.
  • the control circuit 221 causes the analog switch group 226 to connect the electrode lines of the display screen with the touch excitation source 223, and the touch excitation source 223 simultaneously applies to the electrode lines of the display row electrode 211 and the column electrode 212.
  • Touch excitation signal The touch control circuit 225 determines whether the display screen 210 is touched, and the positions of the row and column electrode lines are touched by detecting changes in the touch signals on the touch signal detection points 231, 232, ..., 23n, and the display screen 210 is at Touch detection status. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 200 is repeatedly switched between the display driving period and the touch detection period, and the display driving and the touch detecting time division multiplexing the display electrodes form a touch panel display that is both displayable and touchable.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest.
  • the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the touch panel display 300 shown in FIG. 3 includes a display screen 310 and a driving circuit 320.
  • the driving circuit 320 includes a control circuit 321, a display driving source 322 for providing display driving energy, a touch excitation source 323 for providing touch excitation energy, a display strobe output circuit 324, a touch circuit 325, and a display composed of the analog switch group 326. I touch signal strobe output circuit and analog switch group 327.
  • the display screen 310 has a display row electrode 311, a column electrode 312, and the like.
  • the input terminal of the display strobe output circuit 324 is connected to the display driving source 322; the output terminals of the display strobe output circuit 324 are respectively connected to one input terminal of each analog switch of the analog switch group 326; and the analog switch group 326 is another one of each analog switch.
  • the input end is respectively connected to the touch excitation source 323 through the touch signal sampling units 331 , 332 , . . . , 33 n of the touch circuit 325 ; the output ends of the analog switches of the analog switch group 326 are respectively connected to the display row electrode 311 and each electrode line of the column electrode 312.
  • touch signal detection points respectively corresponding to the electrode lines of the display screen are set, and then through the analog switch group 327
  • Each of the analog switches is connected to the touch circuit 325, and the touch circuit 325 detects a change in the potential at the detection point.
  • the reference end of the potential measurement may be provided at the output end of the touch excitation source 323 or may be provided in the common ground of the drive circuit 320.
  • the terminal may also be provided at a specific reference point of the driving circuit 320.
  • the control circuit 321 causes the analog switch group 326 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 324 to display the strobe output circuit 324 to the electrodes of the connected display panel row electrode 311 and column electrode 312.
  • the line conveys the display driving signal; or communicates with the touch excitation source 323, and the touch excitation source 323 applies a touch excitation signal to each of the connected display line electrode 311 and the column electrode 312.
  • the various connecting lines in Figure 3 do not only represent single-wire connections, but also represent multi-wire connections.
  • the touch panel display described above works as follows:
  • the analog switch group 326 in the driving circuit 320 causes the display electrode lines to communicate with the output terminals of the display strobe output circuit 324, and the control circuit 321 causes the display strobe output circuit 324 to be connected to the connected display.
  • the row electrode 311 and the column electrode 312 deliver a display driving signal, and the display screen 310 is in a display driving state.
  • the control circuit 321 causes the analog switch group 326 to connect the electrode lines of the display screen with the touch excitation source 323, and the touch excitation source 323 simultaneously applies to the electrode lines of the display row electrode 311 and the column electrode 312. Touch excitation signal.
  • the control circuit 321 causes the analog switch group 327 to sample the analog switch group 326 and each touch signal.
  • the touch signal detection points between the units 331 , 332 , . . . 33n are connected to the touch circuit 325 one by one, and the touch circuit 325 determines the display by detecting the change of the touch signal on each touch signal detection point one by one. Whether the screen 310 is touched, the positions of the row and column electrode lines are touched, and the display screen 310 is in the touch detection state. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 300 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplexing the display electrodes form a touch panel display that is both displayable and touchable.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the touch signal sampling unit may be a single resistor or a passive device of a capacitor or an inductor, or a combination of a plurality of passive devices, a single active device, or a circuit unit having an active device.
  • the touch panel display 400 shown in FIG. 4 includes a display screen 410 and a driving circuit 420.
  • the driving circuit 420 includes a control circuit 421, a display driving source 422 for providing display driving energy, a touch excitation source 423 for providing touch excitation energy, a display strobe output circuit 424, a touch circuit 425, and a display composed of the analog switch group 426. I touch signal strobe output circuit and so on.
  • the display screen 410 has a display row electrode 411, a column electrode 412, and the like.
  • the input end of the display strobe output circuit 424 is connected to the display driving source 422; the output terminals of the display strobe output circuit 424 are respectively connected to one input terminal of each analog switch of the analog switch group 426; the other input end of each analog switch is connected together
  • the contact control excitation source 423; the output end of each analog switch of the analog switch group 426 is connected to each electrode line of the display row electrode 411 and the column electrode 412, respectively.
  • the detection points 431, 432, ..., 43n corresponding to the touch circuits 425 of the display electrode lines are respectively connected, and the touch circuit 425 is connected.
  • the touch circuit 425 detects a change in the potential at the detection point.
  • the reference end of the potential measurement may be disposed at the output end of the touch excitation source 423, or may be disposed at a common ground end of the driving circuit 420, or may be disposed at the driving circuit 420.
  • the control circuit 421 causes the analog switch group 426 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 424 to display the strobe output circuit 424 to the electrodes of the connected display panel row electrode 411 and column electrode 412.
  • the line conveys a display driving signal; or is connected to the touch excitation source 423, and the touch excitation source 423 applies a touch excitation signal to each of the connected display row electrode 411 and the column electrode 412.
  • Each of the connecting lines in FIG. 4 does not only represent a single-wire connection, but also represents a multi-wire connection relationship.
  • the touch panel display described above works as follows: During the display driving period, the analog switch group 426 in the driving circuit 420 causes the display electrode lines to communicate with the output terminals of the display strobe output circuit 424, and the control circuit 421 causes the display strobe output circuit 424 to be connected to the connected display.
  • the row electrode 411 and the column electrode 412 convey a display driving signal, and the display screen 410 is in a display driving state.
  • the control circuit 421 causes the analog switch group 426 to connect the electrode lines of the display array to the touch excitation source 423.
  • the touch excitation source 423 simultaneously connects the electrode lines of the display row electrode 411 and the column electrode 412. A touch excitation signal is applied.
  • the touch control circuit 425 determines whether the display screen 410 is touched, the position of the row and column electrode lines is touched, and the display screen 410 is in the touch detection manner by detecting the change of the touch signal on each of the detection points 431, 432, ..., 43n. status. The position of the touched position is determined by the intersection of the detected touched electrode line and the touched electrode line.
  • the touch panel display 400 is repeatedly switched between the display driving period and the touch detection period, and the display driving and the touch detecting time division multiplexing the display electrodes form a touch panel display that can be displayed and touched.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the touch panel display 500 shown in FIG. 5 includes a display screen 510 and a driving circuit 520.
  • the driving circuit 520 includes a control circuit 521, a display driving source 522 for providing display driving energy, a touch excitation source 523 for providing touch excitation energy, a display strobe output circuit 524, a touch circuit 525, and a display composed of the analog switch group 526. I touch signal strobe output circuit and analog switch group 527 and the like.
  • the display screen 510 has a display row electrode 511, a column electrode 512, and the like.
  • the input end of the display strobe output circuit 524 is connected to the display driving source 522; the output terminals of the display strobe output circuit 524 are respectively connected to one input terminal of each analog switch of the analog switch group 526; the other input end of each analog switch is connected together
  • the contact control excitation source 523; the output terminals of the analog switches of the analog switch group 526 are respectively connected to the electrode lines of the display row electrode 511 and the column electrode 512.
  • touch signal detection points 531, 532, . . . 53 n corresponding to the electrode lines of the display screen are respectively disposed, and then each of the analog switch groups 527 is set.
  • the analog switch is connected to the touch circuit 525, and the touch circuit 525 detects the change of the potential at the detection point.
  • the reference end of the potential measurement may be disposed at the output end of the touch excitation source 523 or at the common ground of the drive circuit 520. It can also be provided at a specific reference point of the drive circuit 520.
  • the control circuit 521 causes the analog switch group 526 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 524, and the display strobe output circuit 524 is electrically connected to the connected display screen row electrode 511 and column electrode 512.
  • the polar line conveys the display driving signal; or is connected to the touch excitation source 523, and the touch excitation source 523 applies a touch excitation signal to each of the connected display line electrode 511 and the column electrode 512.
  • Each of the connecting lines in FIG. 5 does not only represent a single-wire connection, but also represents a multi-wire connection relationship.
  • the touch panel display described above works as follows:
  • the analog switch group 526 in the driving circuit 520 causes the display electrode lines to communicate with the respective output terminals of the display strobe output circuit 524, and the control circuit 521 causes the display strobe output circuit 524 to be connected to the connected display.
  • the row electrode 511 and the column electrode 512 convey a display driving signal, and the display screen 510 is in a display driving state.
  • the control circuit 521 causes the analog switch group 526 to connect the electrode lines of the display screen with the touch excitation source 523, and the touch excitation source 523 simultaneously applies to the electrode lines of the display row electrode 511 and the column electrode 512.
  • Touch excitation signal causes the analog switch group 527 to connect the touch signal detection points between the analog switch output terminals of the analog switch group 526 and the electrode lines of the display screen 510 one by one to the touch circuit 525, and the touch circuit 525 passes through one by one.
  • the change of the touch signal on each touch signal detection point is detected to determine whether the display screen 510 is touched, the position of the row and column electrode lines is touched, and the display screen 510 is in the touch detection state. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 500 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplexing the display electrodes form a touch panel display that can be displayed and touched.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the touch panel display 600 shown in FIG. 6 includes a display screen 610 and a driving circuit 620.
  • the driving circuit 620 includes a control circuit 621, a display driving source 622 for providing display driving energy, a touch excitation source 623 for providing touch excitation energy, a display strobe output circuit 624, a touch circuit 625, and a display composed of the analog switch group 626.
  • the display screen 610 has a display row electrode 611, a column electrode 612, and the like.
  • the input terminal of the display strobe output circuit 624 is connected to the display driving source 622; the output terminals of the display strobe output circuit 624 are respectively connected to one input terminal of each analog switch of the analog switch group 626; the other input of each analog switch of the analog switch group 626 The terminals are connected to the touch excitation source 623; the output terminals of the analog switches of the analog switch group 626 are respectively connected to the electrode lines of the display row electrode 611 and the column electrode 612.
  • Each of the analog switches is connected to the touch circuit 625 port 6251, and the touch signal detection points 63i+1, ..., 63n are connected to the touch circuit 625 port 6252 through the analog switch group 628 analog switches, and the touch circuit 625 detects the detection point.
  • the reference point of the potential measurement may be set at the output end of the touch excitation source 523, or may be set at a common ground end of the driving circuit 620, or may be set at a specific reference point of the driving circuit 620.
  • the control circuit 621 causes the analog switch group 626 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 624 to display the strobe output circuit 624 to the electrodes of the connected display panel row electrode 611 and column electrode 612.
  • the line conveys the display driving signal; or communicates with the touch excitation source 623, and the touch excitation source 623 applies a touch excitation signal to the connected electrode lines of the display screen row electrode 611 and the column electrode 612.
  • Each of the connecting lines in FIG. 6 does not only represent a single-wire connection, but also represents a multi-wire connection relationship.
  • the touch panel display described above works as follows:
  • the analog switch group 626 in the driving circuit 620 causes the display electrode lines to communicate with the respective output terminals of the display strobe output circuit 624, and the control circuit 621 causes the display strobe output circuit 624 to be connected to the connected display.
  • the row electrode 611 and the column electrode 612 deliver a display driving signal, and the display screen 610 is in a display driving state.
  • the control circuit 621 causes the analog switch group 626 to connect the electrode lines of the display screen with the touch excitation source 623, and the touch excitation source 623 simultaneously applies the electrode lines of the display row electrode 611 and the column electrode 612. Touch excitation signal.
  • the control circuit 621 causes the analog switch group 627 to connect the touch signal detection points 631 and 63i between the output end of the analog switch group 626 and the electrode line of the display screen 610 to the port 6251 of the touch circuit 625 one by one, and the touch circuit 625 detects one by one.
  • the touch signal detects the change of the touch signal at each point of the points 631, ..., 63i; at the same time, the control circuit 621 also causes the analog switch group 628 to make the touch between the output end of the analog switch group 626 and the electrode line of the display screen 610
  • the control signal detecting points 63i, 10, ..., 63n are connected to the port 6252 of the touch circuit 625 one by one, and the touch circuit 625 detects the touch signals at the respective points of the touch signal detecting points 63i+l, ..., 63n one by one.
  • the touch circuit 625 detects the change of the touch signals on the touch signal detection points 631 to 63i and 63 ⁇ +1 to 63n by means of packet scanning, respectively, to determine whether the display screen 610 is touched or not. The position is touched, and the display screen 610 is in a touch detection state. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 600 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplexing the display electrodes form a touch panel display that can be displayed and touched.
  • the touch signal detection points 631, 632, ..., 63i, 63i+l, .... 63n are divided into two groups, and the scanning and detecting the touch signals are simultaneously performed, which saves time compared to scanning and detecting the touch signals without grouping. If the touch signal detection points are divided into more groups and the scan detection is performed separately, the touch detection period can be made shorter, and the display driving period becomes more Long, it helps to avoid the influence of touch detection on the display effect.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the touch panel display 700 shown in FIG. 7 includes a thin film transistor (TFT) active display 710 and a driving circuit 720.
  • the driving circuit 720 includes a control circuit 721, a display driving source 722 for providing display driving energy, a touch excitation source 723 for providing touch excitation energy, a display strobe output circuit 724, a touch circuit 725, and the analog switch groups 726 and 727.
  • the display screen 710 has a display row electrode 711, a column electrode 712, a common electrode 713, and the like.
  • the input terminal of the display strobe output circuit 724 is connected to the display driving source 722; the output terminals of the display strobe output circuit 724 are respectively connected to one input terminal of each analog switch of the analog switch group 726; and the other input of each analog switch of the analog switch group 726
  • the terminals are respectively connected to the output ends of the analog switches of the analog switch group 727; the output terminals of the analog switches of the analog switch group 726 are respectively connected to the electrode lines of the display row electrode 711 and the column electrode 712 and the common electrode 713; the analog switch group 727
  • One input end of the analog switch is connected to the touch excitation source 723 via the touch signal sampling component 731 of the touch circuit 725, and the other input terminal is directly connected to the touch excitation source 723; the touch signal sample element 731 is connected to the touch circuit.
  • the touch circuit 725 detects a change in the touch signal on the sampling component.
  • the control circuit 721 causes the analog switch group 726 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 724 to display the strobe output circuit 724 to the electrodes of the connected display panel row electrode 711 and column electrode 712.
  • the line and common electrode 713 delivers a display driving signal; or communicates with the touch excitation source 723, and the touch excitation source 723 applies a touch excitation signal to each of the connected display row electrode 711 and column electrode 712 electrode lines and the common electrode 713.
  • the various connecting lines in Figure 7 do not only represent single-wire connections, but also represent multi-wire connections.
  • the touch panel display described above works as follows:
  • the analog switch group 726 in the driving circuit 720 causes the display electrode lines to communicate with the respective output terminals of the display strobe output circuit 724, and the control circuit 721 causes the display strobe output circuit 724 to be connected to the connected display.
  • the row electrode 711, the column electrode 712, and the common electrode 713 deliver a display driving signal, and the display screen 710 is in a display driving state.
  • the control circuit 721 causes the analog switch group 726 to connect the electrodes of the display screen to the analog switch group 727, and then through the analog switch group 727, each time only one display electrode line is allowed, or each time Strip display
  • the display electrode line is connected to the touch excitation source 723 through the touch signal sampling component 731; the remaining display electrodes are directly connected to the touch excitation source 723; the touch circuit 725 sequentially detects the touch on the touch signal sampling component 731.
  • the change of the signal determines whether the display screen 710 is touched, the positions of the row and column electrode lines are touched, and the display screen 710 is in the touch detection state. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 700 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplex the display electrodes to form a touch panel display that is both displayable and touchable.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the touch signal sampling unit may be a single resistor or a passive device of a capacitor or an inductor, or a combination of a plurality of passive devices, a single active device, or a circuit unit having an active device.
  • the touch panel display 800 shown in FIG. 8 includes a thin film transistor (TFT) active display screen 810 and a driving circuit 820.
  • the driving circuit 820 includes a control circuit 821, a display driving source 822 for providing display driving energy, a touch excitation source 823 for providing touch excitation energy, a display strobe output circuit 824, a touch circuit 825, an analog switch group 826, and an analog switch.
  • a display/touch signal strobe output circuit composed of groups 8271, 8272, 8273, and 8274.
  • the display screen 810 has a TFT array row electrode 811, a column electrode 812, a common electrode 813, and the like.
  • the input terminal of the display strobe output circuit 824 is connected to the display driving source 822; the output terminals of the display strobe output circuit 824 are respectively connected to one input terminal of each analog switch of the analog switch group 826; the other input of each analog switch of the analog switch group 826
  • the four terminals are respectively connected to the respective output ends of the switches of the analog switch groups 8271, 8272, 8273 and 8274; one input terminals of the switches of the analog switch groups 8271, 8272, 8273 and 8274 are respectively sampled by the touch signals of the touch circuit 825
  • the components 831, 832, 833 and 834 are connected to the touch excitation source 823, and the other input terminals of the switches of the analog switch groups 8211, 8272, 8273 and 8274 are directly connected to the touch excitation source 823.
  • a detection point is connected to the touch circuit 825.
  • the touch circuit 825 detects a change in the potential at the detection point; the reference end point of the potential measurement may be disposed at the other end of the touch signal sampling elements 831, 832, 833, and 834 (ie, the output end of the touch excitation source 823), It may be provided at a common ground end of the driving circuit 820; it may also be provided at a specific reference point of the driving circuit 820.
  • Control circuit 821 allows analog switch bank 826 and analog switch bank 8271, 8272, 8273, 8274
  • the display electrode lines are connected to the respective output terminals of the display strobe output circuit 824, and the display strobe output circuit 824 delivers display driving to the connected display line electrode 811 and the column electrode 812 electrode lines and the common electrode 813.
  • the signal is connected to the touch excitation source 823, and the touch excitation source 823 applies a touch excitation signal to each of the connected display row electrode S11 and column electrode 812 electrode lines and the common electrode 813.
  • Each of the connecting lines in FIG. 8 does not only represent a single-wire connection, but also represents a multi-wire connection relationship.
  • the touch panel display described above works as follows:
  • the analog switch group 826 in the driving circuit 820 causes the display electrode lines to communicate with the respective output terminals of the display strobe output circuit 824, and the control circuit 821 causes the display strobe output circuit 824 to be connected to the connected display.
  • the row electrode 811, the column electrode 812, and the common electrode 813 deliver a display driving signal, and the display screen 810 is in a display driving state.
  • the control circuit 821 causes the analog switch group 826 to connect the electrodes of the display screen to the analog switch groups 8271, 8272, 8273, and 8274, respectively, and the analog switch groups 8271, 8272, 8273, and 8274 are each time.
  • Only the part (one or more) display electrode lines in each group are connected to the touch excitation source 823 through the touch signal sampling elements 831, 832, 833 and 834 respectively; the remaining display electrode lines are directly connected to the touch
  • the excitation source 823 is connected to each other; the touch circuit 825 detects the change of the touch signal on each detection point and simultaneously performs touch detection on the plurality of areas of the display screen 810 to determine whether the display screen 810 is touched and which areas are touched. The positions of the row and column electrode lines are touched, and the display screen 810 is in the touch detection state. From the detected intersection of the touched electrode line and the touched column line, the position of the contact is determined.
  • the touch panel display 800 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplexing the display electrodes form a touch panel display that can be displayed and touched.
  • Simultaneous touch detection on multiple areas of the display can save time required for touch detection on the full screen of the display, making the touch detection period shorter, and the display driving period becomes longer, which is beneficial to avoid touch detection.
  • the effect on the display effect DETAILED DESCRIPTION OF THE INVENTION
  • the touch panel display 900 shown in FIG. 9 includes a passive display screen 910 and a driving circuit 920.
  • the driving circuit 920 includes a control circuit 921, a display driving source 922 for providing display driving energy, a touch excitation source 923 for providing touch excitation energy, a display strobe output circuit 924, a touch circuit 925, and a display/touch signal loading circuit group. 926 and analog switch group 927 and so on.
  • the display screen 910 has a display row electrode 911, a column electrode 912, and the like.
  • the display driving source 922 uses a DC power source
  • the touch excitation source 923 uses an AC power source of a higher frequency (eg, greater than 50 KHz).
  • the input terminal of the display strobe output circuit 924 is connected to the display driving source 922; the outputs of the strobe output circuit 924 are displayed.
  • the terminals are respectively connected to one input end of each of the signal loading circuit units 9261, 9262, ... 926n of the display/touch signal loading circuit group 926, and the signal loading circuit units 9261, 9262 of the display/touch signal loading circuit group 926 are respectively connected.
  • the other input end of the 926n is respectively connected to the output end of each analog switch of the analog switch group 927; the output end of each signal loading circuit unit 9261, .. . , 926 ⁇ of the display/touch signal loading circuit group 926 is respectively connected and displayed.
  • Each of the input terminals of the switch 927 and the column electrode 912 is connected to the touch excitation source 923 via the touch signal sampling resistor 931 of the touch circuit 925, and the other input terminal is balanced by the resistor 932.
  • a touch excitation source 923 is connected.
  • a detection point is set on the end of the touch signal sampling element 931 connected to the analog switch group 927, and the touch circuit 925 is connected.
  • the touch circuit 925 detects a change in the potential at the detection point.
  • the reference end of the potential measurement may be disposed at the other end of the touch signal sampling component 931 (ie, the output end of the touch excitation source 923), or may be disposed at the balance resistor 932.
  • connection analog switch group 927 may be provided at a common ground end of the drive circuit 920 or at a specific reference point of the drive circuit 920.
  • the display/touch signal loading circuit group 926 and the analog switch group 927 are caused to apply a mixed signal of the display driving source 922 and the AC touch excitation source 923 to the respective electrode lines of the display row electrode 911 and the column electrode 912.
  • Each of the connecting lines in FIG. 9 does not only represent a single-wire connection, but also represents a multi-wire connection relationship.
  • the touch panel display can be operated in the same manner as the display driving and the touch detection: the control circuit 921 selects only one of the analog switches of the analog switch group 927 at a time, and connects the chirp frequency through the touch signal sampling resistor 931.
  • the touch excitation source 923 is connected to the high frequency touch excitation source 923 through the balance resistor 932.
  • Each of the signal loading circuit units of the display/touch signal loading circuit group 926 combines the low frequency display driving signal and the high frequency touch signal from the display driving source 922 and the touch excitation source 923 simultaneously on the connected display.
  • the electrode lines 911 and the column electrodes 912 are on respective electrode lines.
  • the control circuit 921 causes the switches of the analog switch group 927 to be connected to the touch excitation source 923 through the touch signal sampling resistor 931, and the remaining switches of the analog switch group 927 are connected to the touch excitation source 923 through the balance resistor 932; the display line electrode 911 and The electrode electrodes 912 simultaneously transmit the touch signals at the same time, and the touch circuit 925 detects only the change of the high frequency touch signals on one of the display row electrodes 911 and the column electrodes 912 at a time.
  • the touch circuit 925 determines whether the display screen 910 is touched and which electrode lines are touched by sequentially detecting changes in the high frequency touch signals on the touch signal sampling element 931. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the display driver and the touch detection frequency division multiplexing display electrodes form a touch panel display device that can be displayed and touched.
  • the touch panel display can also display the driving and touch detection time-sharing mode: during the display driving period, the switches of the analog switch group 927 in the driving circuit 920 are disconnected from the touch excitation source 923, and the display driver The source 922 is connected, and the display/touch signal loading circuit group 926 has signal loading circuit units, only The low frequency display driving signal from the display driving source 922 is applied to the respective electrode lines of the connected display panel row electrode 911 and the column electrode 912, and the display screen 910 is in the display driving state.
  • the control circuit 921 selects only one of the analog switches of the analog switch group 927 at a time, and connects the high-frequency touch excitation source 923 through the touch signal sampling resistor 931, and the remaining switches are also connected through the balancing resistor 932.
  • Each of the signal loading circuit units of the display/touch signal loading circuit group 926 combines the low frequency display driving signal and the high frequency touch signal from the display driving source 922 and the touch excitation source 923 simultaneously on the connected display.
  • the electrode lines 911 and the column electrodes 912 are on respective electrode lines.
  • the control circuit 921 further causes the display driving state of the display strobe output circuit 924 to output a black or white display driving signal, and the signal loading circuit group 926 signals the circuit unit to simultaneously display the electrodes of the display row electrode 911 and the column electrode 912.
  • the line delivers low frequency black or white display drive signals and high frequency touch signals.
  • the control circuit 921 causes the switches of the analog switch group 927 to sequentially connect the touch excitation source 923 through the touch signal sampling resistor 931, and the remaining switches of the analog switch group 927 are connected to the touch excitation source 923 through the balance resistor 932; the display line electrode 911 and Each of the electrode lines of the column electrode 912 transmits the touch signal at the same time, and the touch circuit 925 detects only the high frequency touch on the electrode line of the display line electrode 911 and the column electrode 912 that is in communication with the touch signal sampling resistor 931. Control signal changes.
  • the touch control circuit 925 determines whether the display screen 910 is touched, the position of the electrode lines is touched, and the display screen 910 is in the touch detection state by sequentially detecting the change of the high frequency touch signal on the touch signal sampling component 931. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 900 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplexing the display electrodes form a touch panel display that can be displayed and touched.
  • the touch panel display 1000 shown in FIG. 10 includes a thin film transistor (TFT) active display 1010 and a driving circuit 1020.
  • the driving circuit 1020 includes a control circuit 1021, a display driving source 1022 that provides display driving energy, a touch excitation source 1023 that provides touch excitation energy, a display strobe output circuit 1024, a touch circuit 1025, and a display/touch signal strobe output. Circuits, etc.
  • the display/touch signal strobe output circuit is composed of an analog switch group 1026, which is a multi-pole single-throw analog switch group composed of a single-pole single-throw analog switch.
  • the display screen 1010 has a display row electrode 1011, a column electrode 1012, a common electrode 1013, and the like.
  • the input end of the display strobe output circuit 1024 is connected to the display driving source 1022; the output terminals of the display strobe output circuit 1024 are respectively connected to one input end of each analog switch of the analog switch group 1026; the second of each analog switch of the analog switch group 1026
  • the input end is connected to the touch excitation source 1023 through the sample resistors 1031 and 1032 respectively, and the third input end of each analog switch of the analog switch group 1026 is directly connected to the touch excitation source 1023; the output of each analog switch of the analog switch group 1026 End, minute
  • the electrode lines of the display row electrode 1011 and the column electrode 1012 and the common electrode 1013 are not connected; the touch signal detection points 10310, 10320 are set at the connection point of the touch signal sampling resistors 1031 and 1032 connected to the input end of the analog switch group 1026.
  • the control circuit 1025 detects a change in the touch signal at each of the detection points.
  • the reference end point of the potential measurement may be disposed at the other end of the touch signal sampling resistors 1031, 1032 (ie, the output end of the touch excitation source 1023), or may be disposed at a common ground end of the driving circuit 1020, or may be set to be driven. A particular reference point for circuit 1020.
  • the control circuit 1021 causes the analog switch group 1026 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 1024, and displays the strobe output circuit 1024 to the electrodes of the connected display panel row electrode 1011 and column electrode 1012.
  • the line and common electrode 1013 conveys a display driving signal; or communicates with the touch excitation source 1023, and the touch excitation source 1023 applies a touch excitation signal to each of the connected display row electrode 1011 and the column electrode 1012 electrode line and the common electrode 1013.
  • Each of the connecting lines in FIG. 10 does not only represent a single-wire connection, but also represents a multi-wire connection relationship.
  • the touch panel display described above works as follows:
  • the analog switch group 1026 in the driving circuit 1020 causes the display electrode lines to communicate with the respective output terminals of the display strobe output circuit 1024, and the control circuit 1021 causes the display strobe output circuit 1024 to the connected display screen.
  • the row electrode 1011, the column electrode 1012, and the common electrode 1013 convey display driving signals, and the display screen 1010 is in a display driving state.
  • the control circuit 1021 allows the analog switch group 1026 to have only one display electrode line at a time, or multiple display display electrode lines at a time, through the touch signal sampling resistors 1031, 1032 and touch excitation.
  • the source 1023 is connected to each other; the remaining display electrodes are directly connected to the touch excitation source 1023; the touch circuit 1025 detects the change of the touch signal at each detection point, and simultaneously performs touch detection on multiple areas of the display 1010. It is determined whether the display screen 1010 is touched, which areas are touched, and which of the row and column electrode lines are touched, and the display screen 1010 is in the touch detection state. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 1000 is repeatedly switched between the display driving period and the touch detecting period, and the display driving and the touch detecting time division multiplex the display electrodes to form a touch panel display that can be displayed and touched.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the embodiment is different from the tenth embodiment in that: in the embodiment ⁇ -
  • the analog switch group 1126 of the display/touch signal strobe output circuit is composed of a multi-bit single-pole multi-throw analog switch, and its connection mode and working principle are the same as those of the specific embodiment 10.
  • the touch panel display 1200 shown in FIG. 12 includes a display screen 1210 and a driving circuit 1220.
  • the driving circuit 1220 includes a control circuit 1221, a display driving source 1222 that provides display driving energy, a touch excitation source 1223 that provides touch excitation energy, a display strobe output circuit 1224, a touch circuit 1225, and a display/touch signal strobe output. Circuits, etc.
  • the display/touch signal strobe output circuit is composed of an analog switch group 1226, which is a multi-tool multi-throw analog switch group composed of a multi-bit single-pole single-throw analog switch.
  • the display screen 1210 has a display row electrode 1211, a column electrode 1212, and the like.
  • the input end of the display strobe output circuit 1224 is connected to the display driving source 1222; the output terminals of the display strobe output circuit 1224 are respectively connected to one input end of each analog switch of the analog switch group 1226; the second of each analog switch of the analog switch group 1226 The input end is respectively connected to the touch excitation source 1223 through the touch signal sampling component 1231 of the touch circuit 1225; the third input end of each analog switch of the analog switch group 1226 is respectively connected to the touch excitation through the balance component 1232
  • the output terminals of the analog switches of the analog switch group 1226 are respectively connected to the electrode lines of the display row electrode 1211 and the column electrode 1212.
  • a touch signal detection point 12310 corresponding to each electrode line of the display screen is disposed, and then the touch circuit 1225 is connected, and the touch circuit 1225 detects the detection point.
  • the reference point of the potential measurement may be set at the output end of the touch excitation source 1223, or may be set at a common ground end of the driving circuit 1220, or may be set at a specific reference point of the driving circuit 1220.
  • the control circuit 1221 causes the analog switch group 1226 to connect the electrode lines of the display screen or the output terminals of the display strobe output circuit 1224 to display the strobe output circuit 1224 to the electrodes of the connected display panel row electrode 1211 and column electrode 1212.
  • the line conveys the display driving signal; or communicates with the touch excitation source 1223, and the touch excitation source 1223 applies a touch excitation signal to the connected electrode lines of the display screen row electrode 1211 and the column electrode 1212.
  • the various connecting lines in Fig. 12 do not only represent single-wire connections, but also represent multi-wire connections.
  • the touch panel display described above works as follows:
  • the analog switch group 1226 in the driving circuit 1220 causes the display electrode lines to communicate with the output terminals of the display strobe output circuit 1224, and the control circuit 1221 causes the display strobe output circuit 1224 to be connected to the connected display.
  • the row electrode 1211 and the column electrode 1212 convey a display driving signal, and the display screen 1210 is in a display driving state.
  • the control circuit 1221 causes the analog switch group 1226 to connect only one display electrode line to the touch excitation source 1223 through the touch signal sampling element 1231 at a time; the remaining display electrodes pass the balance element.
  • the component 1232 is in communication with the touch excitation source 1223.
  • the touch control circuit 1225 determines whether the display screen 1210 is touched or not, and the position of the row and column electrode lines is touched by sequentially detecting the change of the touch signal on the touch signal detection point. In the touch detection state. From the detected intersection of the touched electrode line and the touched electrode line, the position of the contact is determined.
  • the touch panel display 1200 is repeatedly switched between the display driving period and the touch detection period, and the display driving and the touch detecting time division multiplex the display electrodes to form a touch panel display that can be displayed and touched.
  • the condition of the touched electrode line is determined, and the electrode line that has the largest change in the touch signal flowing through and exceeds a certain threshold is detected as the touched electrode line; or the touch signal that detects the flow changes is the largest. And the electrode line exceeding a certain threshold is the touched electrode line, and only the electrode line whose detected touch signal changes beyond a certain threshold is the touched electrode line, so that the touch panel display allows simultaneous multi touch.
  • the touch signal sampling component and the balancing component may be a single resistor or a passive component of a capacitor or an inductor, or a combination of a plurality of passive components, a single active device, or a circuit having an active device. unit.

Description

说 明 书 一种触控式平板显示器
技术领域
本发明涉及触控屏和平板显示器， 尤其涉及一种触控式平板显示器。 背景技术
申请号为 2006100948141、名称为触控式平板显示器的发明专利说明书， 揭示了一 种触控电路与显示屏电极之间的连接方式， 通过模拟开关使显示屏电极或传输显示驱 动信号， 或传输并感测触控信号， 显示驱动和触控探测时分复用显示屏电极， 显示屏 电极既用于显示驱动又用于触控探测。 申请号为 2006101065583、名称为具有触控功能 的平板显示器的发明专利说明书， 揭示了另一种触控电路与显示屏电极之间的连接方 式， 通过信号加载电路使显示屏电极同时传输显示驱动信号和传输并感测触控信号， 显示驱动和触控探测同时共用显示屏电极， 显示屏电极既用于显示驱动又用于触控探 测。 所揭示的方式让显示屏和触控屏合二为一。
申请号为 200810133417X、 名称为一种触控式平板显示器的发明专利说明书， 揭 示了一种对显示屏电极线施加触控激励信号的方式， 通过让显示屏不同电极线同时连 通触控激励源， 实现对不同显示屏电极线同时施加触控激励信号的方式， 以控制触控 激励信号在显示屏内的流向， 减少触控信号在显示屏不同电极线间的串扰， 做到准确 的触控定位。
在此基础上， 寻求触控电路与显示驱动电路的合理连接， 让触控电路与显示驱动 电路及显示屏电极的连接简单可行， 尽量减少触控电路中的电路单元， 甚至有机会让 显示驱动电路和触控电路可以合二为一， 又是非常具有价值的工作。 发明内容
本发明就是为了建立触控电路与显示驱动电路及显示屏的电路结构关系， 实现触 控激励和显示驱动及显示屏电极线的简捷、 合理连接， 让显示屏不同电极线同时连通 触控激励源， 实现对不同显示屏电极线同时施加触控激励， 控制触控信号在显示屏内 的流向， 减少触控信号在显示屏不同电极线间的串扰， 对触控做到有效检测、 准确定 位。 本发明的技术问题通过以下的技术方案予以解决：
一种触控式平板显示器， 由显示屏和驱动电路等组成， 驱动电路内又包括显示驱 动电路和触控电路等， 显示驱动电路具有提供显示驱动能量的显示驱动源和显示选通 输出电路， 显示驱动电路内的显示选通输出电路各输出端， 分别连接显示 /触控信号选 通输出电路或显示 /触控信号加载电路各单元的输入端，信号显示 /触控选通电路或显示 /触控信号加载电路各单元的输出端， 分别连接显示屏的各电极线。 显示 /触控信号选通 输出电路或显示 /触控信号加载电路的各单元通过一条或多条电路路径连接触控激励 源， 显示 /触控信号选通输出电路或显示 /触控信号加载电路让多于两条显示屏电极线同 时连通提供触控激励能量的触控激励源， 触控电路分时检测触控激励源连接显示屏各 电极线的电路路径上触控信号的变化， 来判断各显示屏电极线的位置是否被触碰。
本发明的技术问题通过以下的技术方案进一歩予以解决：
根据本发明的另一个具体方面， 所述让显示屏电极线连通触控激励源的显示 /触控 信号选通输出电路或显示 /触控信号加载电路各单元， 是通过一条电路路径连接触控激 励源，触控电路通过检测显示 /触控信号选通输出电路或显示 /触控信号加载电路单元连 接触控激励源路径上触控信号的变化， 来判断选通触控激励源的显示屏电极线的位置 是否被触碰。
根据本发明的另一个具体方面， 所述让显示屏电极线连通触控激励源的显示 /触控 信号选通输出电路或显示 /触控信号加载电路单元， 是通过不少于两条电路路径连接触 控激励源，触控电路通过检测显示 /触控信号选通输出电路或显示 /触控信号加载电路单 元连接触控激励源的多条路径中至少一条路径上触控信号的变化， 来判断选通触控激 励源的显示屏电极线的位置是否被触碰。
根据本发明的另一个具体方面，所述显示 /触控信号选通输出电路或显示 /触控信号 加载电路单元不少于两条连接触控激励源的路径， 是通过选通电路来实现选择连通。
根据本发明的另一个具体方面， 所述触控电路检测触控信号的检测点， 设置在触 控激励源和显示 /触控信号选通输出电路或显示 /触控信号加载电路单元的连接路径上， 或设置在显示 /触控信号选通输出电路或显示 /触控信号加载电路单元和显示屏电极线 的连接路径上。
根据本发明的另一个具体方面， 所述检测触控信号的检测点是用于检测触控信号 变化的电位点或元件。
根据本发明的另一个具体方面， 所述选通电路可以是模拟开关， 也可以是其他起 选通作用的电路。 根据本发明的另一个具体方面， 所述触控电路的触控信号检测电路， 是无源元件， 或是有源元件， 或是多个元件组成的电路单元。
根据本发明的另一个具体方面， 所述触控电路检测连接触控激励源多条路径中至 少一条路径上的触控信号， 检测的是电流信号和电压信号中的至少一种。
根据本发明的另一个具体方面， 所述触控电路检测连接触控激励源多条路径中至 少一条路径上的触控信号， 检测的是幅值、 时间、 相位、 频率信号和脉冲数中的至少 一种。
根据本发明的另一个具体方面， 所述连接显示屏各电极线的触控激励源， 可以是 同一触控激励源的同一输出端， 也可以是同一触控激励源的不同输出端， 也可以是不 同触控激励源。
根据本发明的另一个具体方面， 所述触控激励源是交流电源、 也可以是交直流混 合电源， 输出波形可以是方波、 也可以是正弦波、 也可以方波或正弦波与直流的叠加 波、 也可以是其他波形。
根据本发明的另一个具体方面， 所述驱动电路通过显示 /触控信号选通输出电路或 显示 /触控信号信号加载电路对显示屏电极线输出的触控信号的频率不小于 50K Hz。
本发明与现有技术对比的有益效果是- 所揭示的方式是相当具体的触控电路与显示驱动电路及显示屏的电路结构关系， 让触控电路与显示驱动电路及显示屏电极的连接合理。 既可以让显示屏不同电极线同 时连通触控激励源， 实现对不同显示屏电极线同时施加触控激励信号， 控制触控信号 在显示屏内的流向， 减少触控信号在显示屏不同电极线间的串扰； 又可以只用少量的 触控电路单元， 来分别检测流过显示屏不同电极线的触控信号， 减小多触控电路单元 的体积、 功耗和成本。 让触控电路与显示驱动电路及显示屏电极的连接简单可行， 甚 至有机会让显示驱动电路和触控电路可以合二为一。 设立合理的被触电极线的判断条 件， 可以让本发明的触控式平板显示器允许同时多点触控。 附图说明
图 1是本发明具体实施方式一的电气连接示意图；
图 2是本发明具体实施方式二的电气连接示意图；
图 3是本发明具体实施方式三的电气连接示意图；
图 4是本发明具体实施方式四的电气连接示意图；
图 5是本发明具体实施方式五的电气连接示意图； 图 6是本发明具体实施方式六的电气连接示意图；
图 7是本发明具体实施方式七的电气连接示意图；
图 8是本发明具体实施方式八的电气连接示意图；
图 9是本发明具体实施方式九的电气连接示意图；
图 10是本发明具体实施方式九的电气连接示意图；
图 11是本发明具体实施方式九的电气连接示意图；
图 12是本发明具体实施方式九的电气连接示意图。 難
平板显示器有多种， 以液晶显示器 (LCD)为例， 无源液晶显示器， 比如扭曲（Twist Nematic, 简称 TN) 型液晶显示器 （TN-LCD ) 和超扭曲 （Super Twist Nematic, 简称 STN)型液晶显示器（STN-LCD), —般下基板玻璃上具有显示扫描电极线或显示信号 电极线 （即行电极线）， 上基板玻璃上具有显示信号电极线或显示扫描电极线 （即列电 极线），交叉部分即为显示象素。有源液晶显示器，比如薄膜晶体管（Thin Film Transistor, 简称 TFT) 液晶显示器 （TFT-LCD) —般包括位于一基板玻璃上的 TFT阵列、 显示象 素阵列， 与 TFT的柵极相连的显示扫描电极线 （即行电极线）， 与 TFT的源极或漏极 相连的显示信号电极线 （即列电极线）； 和位于另一基板玻璃上的彩色滤光膜以及公共 电极。 而等离子显示器 （PDP)、 有源和无源有机发光二极管显示器 （OLED) 等其他 平板显示器， 同样具有显示扫描电极线和显示信号电极线 （即行列电极线）。
本发明所揭示的触控式平板显示器， 由显示屏和驱动电路等组成， 驱动电路内又 包括显示驱动电路和触控电路等， 驱动电路的各输出端分别连接显示屏的各条电极线。 依靠与显示驱动电路相连接的触控电路， 对平板显示器的行列电极线进行触控探测， 显示驱动和触控探测复用显示屏电极， 让平板显示器在正常显示的同时实现触控探测。 具体实施方式一
如图 1所示的触控式平板显示器 100， 包括显示屏 110、 驱动电路 120。 驱动电路 120包括控制电路 121、 提供显示驱动能量的显示驱动源 122、 提供触控激励能量的触 控激励源 123、显示选通输出电路 124、触控电路 125、显示 /触控信号选通输出电路 126 等。 显示屏 110具有显示屏行电极 111和列电极 112等。 显示选通输出电路 124的输 入端连接显示驱动源 122; 显示选通输出电路 124的各输出端分别连接显示 /触控信号 选通输出电路 126各选通电路单元 1261、 1262、 ...、 126η的一个输入端； 各选通电路 单元 1261、 1262、 .. .、 126N的另一个输入端， 分别通过触控电路 125的触控信号采样 单元 131、 132、 ... . 13η连接触控激励源 123 ; 各触控信号采样单元 131、 132、 ...、 13η连接触控电路 125，触控电路 125检测采样单元上触控信号的变化； 显示 /触控信号 选通输出电路 126各选通电路单元 1261、 1262、 ...、 126η的输出端， 分别连接显示屏 行电极 111和列电极 112的各电极线。
控制电路 121让显示 /触控信号选通输出电路 126使显示屏各电极线， 或与显示选 通输出电路 124的各输出端连通，显示选通输出电路 124向所连接的显示屏行电极 111 和列电极 112各电极线输送显示驱动信号； 或与触控激励源 123连通， 触控激励源 123 向所连接的显示屏行电极 111和列电极 112各电极线施加触控激励信号。 图 1 中的各 条连接线， 并不只代表单线连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 120 内的显示 /触控信号选通输出电路 126， 使显示屏 各电极线与显示选通输出电路 124的各输出端连通， 控制电路 121让显示选通输出电 路 124向所连接的显示屏行电极 111和列电极 112输送显示驱动信号， 显示屏 110处 于显示驱动状态。
在触控探测时段， 控制电路 121让显示 /触控信号选通输出电路 126, 使显示屏各 电极线分别通过各触控信号采样单元 131、 132、 ...、 13η与触控激励源 123连通， 触 控激励源 123 向显示屏行电极 111和列电极 112的各电极线同时施加触控激励信号。 触控电路 125通过检測各触控信号采样单元 131、 132、 ...、 13η上触控信号的变化， 来判断显示屏 110是否被触摸、 哪些行列电极线的位置被触摸， 显示屏 110处于触控 探测状态。 由探测到的被触行电极线和被触列电极线的交叉点， 确定出被触点位置。
让触控式平板显示器 100反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。
使显示屏电极或与显示驱动电路连通传输显示驱动信号、 或与触控电路连通传输 触控信号的显示 /触控信号选通输出电路， 可以是多路模拟开关， 也可以是其他起选通 作用的电路。
触控信号采样单元可以是单一电阻或电容或电感的无源器件， 也可以是多种无源 器件的组合， 也可以是单一的有源器件， 也可以是具有有源器件的电路单元。 具体实施方式二
如图 2所示的触控式平板显示器 200， 包括显示屏 210、 驱动电路 220。 驱动电路 220包括控制电路 221、 提供显示驱动能量的显示驱动源 222、 提供触控激励能量的触 控激励源 223、 显示选通输出电路 224、 触控电路 225、 由模拟开关组 226构成的显示 I触控信号选通输出电路等。 显示屏 210具有显示屏行电极 211和列电极 212等。 显 示选通输出电路 224的输入端连接显示驱动源 222;显示选通输出电路 224的各输出端 分别连接模拟开关组 226各模拟开关的一个输入端； 模拟开关组 226各模拟开关的另 一个输入端分别连接触控激励源 223 ; 模拟开关组 226各模拟开关的输出端，分别连接 显示屏行电极 211和列电极 212的各电极线。 在模拟开关组 226与触控激励源 223之 间的连接点上， 设置分别对应于显示屏各电极线的触控电路 225 的触控信号检测点 231、 232、 ...、 23η, 连接触控电路 225， 触控电路 225检测触控信号检测点上电位的 变化； 电位测量的参考端点， 可以设在驱动电路 220 的公共地端， 也可以设在驱动电 路 220的某一特定的参考点。 控制电路 221让模拟开关组 226使显示屏各电极线， 或 与显示选通输出电路 224的各输出端连通， 显示选通输出电路 224向所连接的显示屏 行电极 211和列电极 212各电极线输送显示驱动信号； 或与触控激励源 223连通， 触 控激励源 223向所连接的显示屏行电极 211和列电极 212各电极线施加触控激励信号。 图 2中的各条连接线， 并不只代表单线连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作- 在显示驱动时段， 驱动电路 220内的模拟开关组 226，使显示屏各电极线与显示选 通输出电路 224的各输出端连通， 控制电路 221让显示选通输出电路 224向所连接的 显示屏行电极 211和列电极 212输送显示驱动信号， 显示屏 210处于显示驱动状态。
在触控探测时段， 控制电路 221让模拟开关组 226， 使显示屏各电极线与触控激励 源 223连通， 触控激励源 223向显示屏行电极 211和列电极 212的各电极线同时施加 触控激励信号。 触控电路 225通过检测各触控信号检测点 231、 232、 ...、 23η上触控 信号的变化， 来判断显示屏 210是否被触摸、 哪些行列电极线的位置被触摸， 显示屏 210处于触控探测状态。 由探测到的被触行电极线和被触列电极线的交叉点，确定出被 触点位置。
让触控式平板显示器 200反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。 判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。 具体实施方式三
如图 3所示的触控式平板显示器 300， 包括显示屏 310、 驱动电路 320。 驱动电路 320包括控制电路 321、 提供显示驱动能量的显示驱动源 322、 提供触控激励能量的触 控激励源 323、 显示选通输出电路 324、 触控电路 325、 由模拟开关组 326构成的显示 I触控信号选通输出电路和模拟开关组 327等。 显示屏 310具有显示屏行电极 311和 列电极 312等。显示选通输出电路 324的输入端连接显示驱动源 322; 显示选通输出电 路 324的各输出端分别连接模拟开关组 326各模拟开关的一个输入端；模拟幵关组 326 各模拟开关的另一个输入端，分别通过触控电路 325的触控信号采样单元 331、332、...、 33η—同连接触控激励源 323 ; 模拟开关组 326各模拟开关的输出端， 分别连接显示屏 行电极 311和列电极 312的各电极线。 在模拟开关组 326与各触控信号采样单元 331、 332、 .. .、 33η之间的连接点上， 设置分别对应于显示屏各电极线的触控信号检测点， 再通过模拟开关组 327的各模拟开关连接触控电路 325，触控电路 325检测检测点上电 位的变化； 电位测量的参考端点， 可以设在触控激励源 323 的输出端， 也可以设在驱 动电路 320的公共地端， 也可以设在驱动电路 320的某一特定的参考点。控制电路 321 让模拟开关组 326使显示屏各电极线， 或与显示选通输出电路 324的各输出端连通， 显示选通输出电路 324向所连接的显示屏行电极 311和列电极 312各电极线输送显示 驱动信号； 或与触控激励源 323连通， 触控激励源 323 向所连接的显示屏行电极 311 和列电极 312各电极线施加触控激励信号。 图 3 中的各条连接线， 并不只代表单线连 接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 320内的模拟开关组 326，使显示屏各电极线与显示选 通输出电路 324的各输出端连通， 控制电路 321让显示选通输出电路 324向所连接的 显示屏行电极 311和列电极 312输送显示驱动信号， 显示屏 310处于显示驱动状态。
在触控探测时段， 控制电路 321让模拟开关组 326， 使显示屏各电极线与触控激励 源 323连通， 触控激励源 323向显示屏行电极 311和列电极 312的各电极线同时施加 触控激励信号。控制电路 321让模拟开关组 327， 使模拟开关组 326与各触控信号采样 单元 331、 332、 ... . 33n之间的触控信号检测点， 逐一与触控电路 325连通， 触控电 路 325通过逐一检测各触控信号检测点上触控信号的变化， 来判断显示屏 310是否被 触摸、 哪些行列电极线的位置被触摸， 显示屏 310处于触控探测状态。 由探测到的被 触行电极线和被触列电极线的交叉点， 确定出被触点位置。
让触控式平板显示器 300反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。
触控信号采样单元可以是单一电阻或电容或电感的无源器件， 也可以是多种无源 器件的组合， 也可以是单一的有源器件， 也可以是具有有源器件的电路单元。 具体实施方式四
如图 4所示的触控式平板显示器 400， 包括显示屏 410、 驱动电路 420。 驱动电路 420包括控制电路 421、 提供显示驱动能量的显示驱动源 422、 提供触控激励能量的触 控激励源 423、 显示选通输出电路 424、 触控电路 425、 由模拟开关组 426构成的显示 I触控信号选通输出电路等。 显示屏 410具有显示屏行电极 411和列电极 412等。 显 示选通输出电路 424的输入端连接显示驱动源 422;显示选通输出电路 424的各输出端 分别连接模拟开关组 426 的各模拟开关的一个输入端； 各模拟开关的另一个输入端一 同连接触控激励源 423 ;模拟开关组 426各模拟开关的输出端，分别连接显示屏行电极 411和列电极 412的各电极线。 在模拟开关组 426与显示屏 410各电极线的连接点上， 设置分别对应于显示屏各电极线的触控电路 425的检测点 431、 432、 ...、 43η, 连接触 控电路 425， 触控电路 425检测检测点上电位的变化； 电位测量的参考端点， 可以设在 触控激励源 423的输出端， 也可以设在驱动电路 420的公共地端， 也可以设在驱动电 路 420的某一特定的参考点。 控制电路 421让模拟开关组 426使显示屏各电极线， 或 与显示选通输出电路 424的各输出端连通， 显示选通输出电路 424向所连接的显示屏 行电极 411和列电极 412各电极线输送显示驱动信号； 或与触控激励源 423连通， 触 控激励源 423向所连接的显示屏行电极 411和列电极 412各电极线施加触控激励信号。 图 4中的各条连接线， 并不只代表单线连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作： 在显示驱动时段， 驱动电路 420内的模拟开关组 426，使显示屏各电极线与显示选 通输出电路 424的各输出端连通， 控制电路 421让显示选通输出电路 424向所连接的 显示屏行电极 411和列电极 412输送显示驱动信号， 显示屏 410处于显示驱动状态。
在触控探测时段， 控制电路 421让模拟开关组 426， 使显示屏行列各电极线与触控 激励源 423连通， 触控激励源 423向显示屏行电极 411和列电极 412的各电极线同时 施加触控激励信号。 触控电路 425通过检测各检测点 431、 432、 ...、 43η上触控信号 的变化， 来判断显示屏 410是否被触摸、 哪些行列电极线的位置被触摸， 显示屏 410 处于触控探测状态。 由探测到的被触行电极线和被触列电极线的交叉点， 确定出被触 点位置。
让触控式平板显示器 400反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。 具体实施方式五
如图 5所示的触控式平板显示器 500， 包括显示屏 510、 驱动电路 520。 驱动电路 520包括控制电路 521、 提供显示驱动能量的显示驱动源 522、 提供触控激励能量的触 控激励源 523、 显示选通输出电路 524、 触控电路 525、 由模拟开关组 526构成的显示 I触控信号选通输出电路和模拟开关组 527等。 显示屏 510具有显示屏行电极 511和 列电极 512等。显示选通输出电路 524的输入端连接显示驱动源 522; 显示选通输出电 路 524的各输出端分别连接模拟开关组 526的各模拟开关的一个输入端； 各模拟开关 的另一个输入端一同连接触控激励源 523 ;模拟开关组 526各模拟开关的输出端，分别 连接显示屏行电极 511和列电极 512的各电极线。 在模拟开关组 526与显示屏 510各 电极线之间的连接点上， 设置分别对应于显示屏各电极线的触控信号检测点 531、 532、 . ^ 53η, 再通过模拟开关组 527的各模拟开关连接触控电路 525， 触控电路 525 检测检测点上电位的变化； 电位测量的参考端点， 可以设在触控激励源 523的输出端， 也可以设在驱动电路 520的公共地端， 也可以设在驱动电路 520的某一特定的参考点。 控制电路 521让模拟开关组 526使显示屏各电极线， 或与显示选通输出电路 524的各 输出端连通， 显示选通输出电路 524向所连接的显示屏行电极 511和列电极 512各电 极线输送显示驱动信号； 或与触控激励源 523连通， 触控激励源 523 向所连接的显示 屏行电极 511和列电极 512各电极线施加触控激励信号。 图 5中的各条连接线， 并不 只代表单线连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 520内的模拟开关组 526，使显示屏各电极线与显示选 通输出电路 524的各输出端连通， 控制电路 521让显示选通输出电路 524向所连接的 显示屏行电极 511和列电极 512输送显示驱动信号， 显示屏 510处于显示驱动状态。
在触控探测时段， 控制电路 521让模拟开关组 526， 使显示屏各电极线与触控激励 源 523连通， 触控激励源 523向显示屏行电极 511和列电极 512的各电极线同时施加 触控激励信号。控制电路 521让模拟开关组 527， 使模拟开关组 526的各模拟开关输出 端与显示屏 510各电极线之间的触控信号检测点， 逐一与触控电路 525连通， 触控电 路 525通过逐一检测各触控信号检测点上触控信号的变化， 来判断显示屏 510是否被 触摸、 哪些行列电极线的位置被触摸， 显示屏 510处于触控探测状态。 由探测到的被 触行电极线和被触列电极线的交叉点， 确定出被触点位置。
让触控式平板显示器 500反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。 具体实施方式六
如图 6所示的触控式平板显示器 600， 包括显示屏 610、 驱动电路 620。 驱动电路 620包括控制电路 621、 提供显示驱动能量的显示驱动源 622、 提供触控激励能量的触 控激励源 623、 显示选通输出电路 624、 触控电路 625、 由模拟开关组 626构成的显示 I触控信号选通输出电路、 由模拟开关组 627和模拟开关组 628组成的选通电路等。 显示屏 610具有显示屏行电极 611和列电极 612等。 显示选通输出电路 624的输入端 连接显示驱动源 622;显示选通输出电路 624的各输出端分别连接模拟开关组 626各模 拟开关的一个输入端； 模拟开关组 626各模拟开关的另一个输入端一同连接触控激励 源 623 ; 模拟开关组 626各模拟开关的输出端， 分别连接显示屏行电极 611和列电极 612的各电极线。在模拟开关组 626与显示屏 610各电极线之间的连接点上，设置分别 对应于显示屏各电极线的触控信号采样检测点 631、 632、 ...、 63i、 63i+l、 ―.、 63η; 触控信号检测点 631、 ...、 63i通过模拟开关组 627的各模拟开关连接触控电路 625端 口 6251， 触控信号检测点 63i+l、 ...、 63η通过模拟开关组 628各模拟开关连接触控电 路 625端口 6252， 触控电路 625检测检测点上电位的变化； 电位测量的参考端点， 可 以设在触控激励源 523 的输出端， 也可以设在驱动电路 620的公共地端， 也可以设在 驱动电路 620的某一特定的参考点。 控制电路 621让模拟开关组 626使显示屏各电极 线， 或与显示选通输出电路 624的各输出端连通， 显示选通输出电路 624向所连接的 显示屏行电极 611和列电极 612各电极线输送显示驱动信号； 或与触控激励源 623连 通， 触控激励源 623向所连接的显示屏行电极 611和列电极 612各电极线施加触控激 励信号。 图 6中的各条连接线， 并不只代表单线连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 620内的模拟开关组 626，使显示屏各电极线与显示选 通输出电路 624的各输出端连通， 控制电路 621让显示选通输出电路 624向所连接的 显示屏行电极 611和列电极 612输送显示驱动信号， 显示屏 610处于显示驱动状态。
在触控探测时段， 控制电路 621让模拟开关组 626， 使显示屏各电极线与触控激励 源 623连通， 触控激励源 623向显示屏行电极 611和列电极 612的各电极线同时施加 触控激励信号。 控制电路 621让模拟开关组 627， 使模拟开关组 626输出端与显示屏 610电极线之间的触控信号检测点 631、 63i， 逐一连通触控电路 625的端口 6251， 触控电路 625逐一检测触控信号检测点 631、 ...、 63i各点上触控信号的变化； 同时， 控制电路 621也让模拟开关组 628，使模拟开关组 626输出端与显示屏 610电极线之间 的触控信号检测点 63i十 1、 ...、 63η, 逐一连通触控电路 625的端口 6252， 触控电路 625 逐一检测触控信号检测点 63i+l、 ...、 63η各点上触控信号的变化； 触控电路 625通过 分组扫描的方式， 分别检测触控信号检测点 631到 63i 和 63Ϊ+1到 63η上触控信号的 变化， 来判断显示屏 610是否被触摸、 哪些行列电极线的位置被触摸， 显示屏 610处 于触控探测状态。 由探测到的被触行电极线和被触列电极线的交叉点， 确定出被触点 位置。
让触控式平板显示器 600反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
将触控信号检测点 631、 632、 ...、 63i、 63i+l、 .... 63η分两组， 同时进行扫描探 测触控信号， 比不分组进行扫描探测触控信号要节省时间。 若将触控信号检测点分为 更多组同时分别进行扫描探测， 就可让触控探测时段变得更短， 显示驱动时段变得更 长， 有利于避免触控探测对显示效果的影响。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。 具体实施方式七
如图 7所示的触控式平板显示器 700， 包括薄膜晶体管 （TFT) 有源显示屏 710、 驱动电路 720。驱动电路 720包括控制电路 721、提供显示驱动能量的显示驱动源 722、 提供触控激励能量的触控激励源 723、 显示选通输出电路 724、 触控电路 725、 由模拟 开关组 726和 727构成的显示 I触控信号选通输出电路等。 显示屏 710具有显示屏行 电极 711、列电极 712和公共电极 713等。显示选通输出电路 724的输入端连接显示驱 动源 722;显示选通输出电路 724的各输出端分别连接模拟开关组 726各模拟开关的一 个输入端； 模拟开关组 726各模拟开关的另一个输入端分别连接模拟开关组 727各模 拟开关的输出端； 模拟开关组 726各模拟开关的输出端， 分别连接显示屏行电极 711 和列电极 712的各电极线和公共电极 713 ; 模拟开关组 727各模拟开关的一个输入端， 经触控电路 725的触控信号采样元件 731连接触控激励源 723，另一个输入端一同直接 连接触控激励源 723 ; 触控信号釆样元件 731连接触控电路 725， 触控电路 725检测采 样元件上触控信号的变化。 控制电路 721让模拟开关组 726使显示屏各电极线， 或与 显示选通输出电路 724的各输出端连通， 显示选通输出电路 724向所连接的显示屏行 电极 711和列电极 712各电极线和公共电极 713输送显示驱动信号； 或与触控激励源 723连通，触控激励源 723向所连接的显示屏行电极 711和列电极 712各电极线和公共 电极 713施加触控激励信号。 图 7中的各条连接线， 并不只代表单线连接， 也代表多 线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 720内的模拟开关组 726，使显示屏各电极线与显示选 通输出电路 724的各输出端连通， 控制电路 721让显示选通输出电路 724向所连接的 显示屏行电极 711、列电极 712和公共电极 713输送显示驱动信号， 显示屏 710处于显 示驱动状态。
在触控探测时段， 控制电路 721让模拟开关组 726， 使显示屏各电极都连通模拟开 关组 727， 再通过模拟开关组 727， 每次只让一条显示屏电极线， 也可以每次让多条显 示屏电极线， 通过触控信号采样元件 731与触控激励源 723连通； 其余的显示屏电极 直接与触控激励源 723连通； 触控电路 725通过逐次检测触控信号采样元件 731上触 控信号的变化， 来判断显示屏 710是否被触摸、 哪些行列电极线的位置被触摸， 显示 屏 710处于触控探測状态。 由探测到的被触行电极线和被触列电极线的交叉点， 确定 出被触点位置。
让触控式平板显示器 700反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。
触控信号采样单元可以是单一电阻或电容或电感的无源器件， 也可以是多种无源 器件的组合， 也可以是单一的有源器件， 也可以是具有有源器件的电路单元。 具体实施方式八
如图 8所示的触控式平板显示器 800， 包括薄膜晶体管 （TFT) 有源显示屏 810、 驱动电路 820。驱动电路 820包括控制电路 821、提供显示驱动能量的显示驱动源 822、 提供触控激励能量的触控激励源 823、 显示选通输出电路 824、 触控电路 825、 由模拟 开关组 826和模拟开关组 8271、 8272、 8273和 8274组成的显示 /触控信号选通输出 电路等。 显示屏 810具有 TFT阵列行电极 811、 列电极 812和公共电极 813等。 显示 选通输出电路 824的输入端连接显示驱动源 822;显示选通输出电路 824的各输出端分 别连接模拟开关组 826各模拟开关的一个输入端； 模拟开关组 826各模拟开关的另一 个输入端分四组分别连接模拟开关组 8271、 8272、 8273和 8274各开关的各输出端； 模拟开关组 8271、 8272、 8273和 8274各开关的一个输入端分别经触控电路 825的触 控信号采样元件 831、 832、 833和 834连接触控激励源 823， 模拟开关组 8271、 8272、 8273和 8274各开关的另一个输入端一同直接连接触控激励源 823。在触控信号采样元 件 831、 832、 833和 834连接模拟开关组 8271、 8272、 8273和 8274的端点上， 设置 检测点连接触控电路 825。触控电路 825检测检测点上电位的变化； 电位测量的参考端 点， 可以设在触控信号采样元件 831、 832、 833和 834的另一端点 （即触控激励源 823 的输出端）， 也可以设在驱动电路 820的公共地端； 也可以设在驱动电路 820的某一特 定的参考点。 控制电路 821让模拟开关组 826和模拟开关组 8271、 8272、 8273、 8274 使显示屏各电极线， 或与显示选通输出电路 824 的各输出端连通， 显示选通输出电路 824向所连接的显示屏行电极 811和列电极 812各电极线和公共电极 813输送显示驱动 信号； 或与触控激励源 823连通， 触控激励源 823 向所连接的显示屏行电极 S11和列 电极 812各电极线和公共电极 813施加触控激励信号。 图 8中的各条连接线， 并不只 代表单线连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 820内的模拟开关组 826，使显示屏各电极线与显示选 通输出电路 824的各输出端连通， 控制电路 821让显示选通输出电路 824向所连接的 显示屏行电极 811、列电极 812和公共电极 813输送显示驱动信号， 显示屏 810处于显 示驱动状态。
在触控探测时段， 控制电路 821让模拟开关组 826， 使显示屏各电极分四组分别连 接模拟开关组 8271、 8272, 8273和 8274， 模拟开关组 8271、 8272、 8273禾卩 8274都每 次只让每组中的部分 （一条或多条） 显示屏电极线， 分别通过触控信号采样元件 831、 832、 833和 834与触控激励源 823连通； 其余的显示屏电极线直接与触控激励源 823 连通； 触控电路 825通过分别检测各检测点上触控信号的变化， 同时对显示屏 810的 多个区域进行触控探测， 来判断显示屏 810是否被触摸、 哪些区域被触摸、 哪些行列 电极线的位置被触摸， 显示屏 810处于触控探测状态。 由探测到的被触行电极线和被 触列电极线的交叉点， 确定出被触点位置。
让触控式平板显示器 800反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
对显示屏多个区域同时进行触控探測， 可以节省对显示屏全屏进行触控探测所需 时间， 让触控探测时段变得更短， 显示驱动时段变得更长， 有利于避免触控探测对显 示效果的影响。 具体实施方式九
如图 9所示的触控式平板显示器 900， 包括无源显示屏 910、 驱动电路 920。 驱动 电路 920包括控制电路 921、 提供显示驱动能量的显示驱动源 922、 提供触控激励能量 的触控激励源 923、 显示选通输出电路 924、 触控电路 925、 显示 /触控信号加载电路组 926和模拟开关组 927等。显示屏 910具有显示屏行电极 911和列电极 912等。显示驱 动源 922使用直流电源， 触控激励源 923使用较高频率（如大于 50K Hz)的交流电源。 显示选通输出电路 924的输入端连接显示驱动源 922;显示选通输出电路 924的各输出 端分别连接显示 /触控信号加载电路组 926各信号加载电路单元 9261、 9262、 ... . 926η 的一个输入端， 显示 /触控信号加载电路组 926各信号加载电路单元 9261、 9262、 ...、 926η的另一个输入端分别连接模拟开关组 927各模拟开关的输出端； 显示 /触控信号加 载电路组 926各信号加载电路单元 9261、 .. .、 926Ν的输出端， 分别连接显示屏行电极 911 和列电极 912 的各电极线； 模拟开关组 927各开关的一个输入端经触控电路 925 的触控信号采样电阻 931连接触控激励源 923，另一个输入端经平衡电阻 932连接触控 激励源 923。在触控信号釆样元件 931连接模拟开关组 927的端点上设置检测点，连接 触控电路 925。触控电路 925检测检测点上电位的变化， 电位测量的参考端点， 可以设 在触控信号采样元件 931的另一端点 （即触控激励源 923的输出端）， 也可以设在平衡 电阻 932连接模拟开关组 927的端点， 也可以设在驱动电路 920的公共地端， 也可以 设在驱动电路 920的某一特定的参考点。 显示 /触控信号加载电路组 926和模拟开关组 927, 使显示驱动源 922和交流触控激励源 923混合信号施加在显示屏行电极 911和列 电极 912的各电极线上。 图 9中的各条连接线， 并不只代表单线连接， 也代表多线的 连接关系。
上述触控式平板显示器， 可以以显示驱动和触控探测同时进行的方式工作： 控制电路 921每次只选择模拟开关组 927各模拟开关中的一个开关， 通过触控信 号采样电阻 931连通髙频的触控激励源 923，其余开关通过平衡电阻 932也连通高频的 触控激励源 923。 显示 /触控信号加载电路组 926各信号加载电路单元， 将来源于显示 驱动源 922和触控激励源 923的低频显示驱动信号和高频触控信号的混合信号， 同时 施加在相连接的显示屏行电极 911和列电极 912各电极线上。 控制电路 921让模拟开 关组 927各开关逐次通过触控信号采样电阻 931连通触控激励源 923， 让模拟开关组 927的其余开关通过平衡电阻 932连通触控激励源 923 ;显示屏行电极 911和列电极 912 各电极线既同时传输触控信号， 触控电路 925又每次只检测显示屏行电极 911和列电 极 912中一条电极线上高频的触控信号的变化。 触控电路 925通过逐次检测触控信号 采样元件 931上高频的触控信号的变化， 来判断显示屏 910是否被触摸、 哪些电极线 的位置被触摸。 由探测到的被触行电极线和被触列电极线的交叉点， 确定出被触点位 置。 显示驱动和触控探测频分复用显示屏电极， 形成既可显示又可触控的触控式平板 显不器。
上述触控式平板显示器， 也可以显示驱动和触控探测分时进行的方式工作： 在显示驱动时段， 驱动电路 920内的模拟开关组 927各开关与触控激励源 923断 开， 与显示驱动源 922连通， 显示 /触控信号加载电路组 926各信号加载电路单元， 只 将来源于显示驱动源 922的低频显示驱动信号， 施加在相连接的显示屏行电极 911和 列电极 912各电极线上， 显示屏 910处于显示驱动状态。
在触控探测时段， 控制电路 921每次只选择模拟开关组 927各模拟开关中的一个 开关， 通过触控信号采样电阻 931连通高频的触控激励源 923，其余开关通过平衡电阻 932也连通高频的触控激励源 923。显示 /触控信号加载电路组 926各信号加载电路单元， 将来源于显示驱动源 922和触控激励源 923的低频显示驱动信号和高频触控信号的混 合信号， 同时施加在相连接的显示屏行电极 911和列电极 912各电极线上。 控制电路 921再让显示选通输出电路 924的显示驱动状态为输出黑或白的显示驱动信号，信号加 载电路组 926各信号加载电路单元， 就同时向显示屏行电极 911和列电极 912各电极 线输送低频黑或白显示驱动信号和高频触控信号。 控制电路 921让模拟开关组 927各 开关逐次通过触控信号采样电阻 931连通触控激励源 923，让模拟开关组 927的其余开 关通过平衡电阻 932连通触控激励源 923 ;显示屏行电极 911和列电极 912各电极线既 同时传输触控信号， 触控电路 925每次又只检测显示屏行电极 911和列电极 912中与 触控信号采样电阻 931 连通的那一条电极线上高频的触控信号的变化。 触控电路 925 通过逐次检测触控信号采样元件 931上高频的触控信号的变化， 来判断显示屏 910是 否被触摸、 哪些电极线的位置被触摸， 显示屏 910处于触控探测状态。 由探测到的被 触行电极线和被触列电极线的交叉点， 确定出被触点位置。
让触控式平板显示器 900反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。 具体实施方式十
如图 10所示的触控式平板显示器 1000，包括薄膜晶体管（TFT)有源显示屏 1010、 驱动电路 1020。 驱动电路 1020包括控制电路 1021、 提供显示驱动能量的显示驱动源 1022、提供触控激励能量的触控激励源 1023、显示选通输出电路 1024、触控电路 1025、 显示 /触控信号选通输出电路等。 显示 /触控信号选通输出电路是由模拟开关组 1026组 成， 模拟开关组 1026是由单刀单掷模拟开关组成的多刀单掷模拟开关组。显示屏 1010 具有显示屏行电极 1011、 列电极 1012和公共电极 1013等。 显示选通输出电路 1024 的输入端连接显示驱动源 1022;显示选通输出电路 1024的各输出端分别连接模拟开关 组 1026各模拟开关的一个输入端； 模拟开关组 1026各模拟开关的第二个输入端分两 组分别通过釆样电阻 1031、 1032连接触控激励源 1023， 模拟开关组 1026各模拟开关 的第三个输入端直接连接触控激励源 1023 ; 模拟开关组 1026各模拟开关的输出端， 分 别连接显示屏行电极 1011和列电极 1012的各电极线和公共电极 1013 ; 在触控信号采 样电阻 1031、1032连接模拟开关组 1026输入端的连接点上设置触控信号检测点 10310、 10320, 触控电路 1025检测各检测点上的触控信号的变化。 电位测量的参考端点， 可 以设在触控信号采样电阻 1031、 1032的另一端点 （即触控激励源 1023的输出端）， 也 可以设在驱动电路 1020的公共地端， 也可以设在驱动电路 1020的某一特定的参考点。 控制电路 1021让模拟开关组 1026使显示屏各电极线， 或与显示选通输出电路 1024的 各输出端连通， 显示选通输出电路 1024向所连接的显示屏行电极 1011和列电极 1012 各电极线和公共电极 1013输送显示驱动信号； 或与触控激励源 1023连通， 触控激励 源 1023向所连接的显示屏行电极 1011和列电极 1012各电极线和公共电极 1013施加 触控激励信号。图 10中的各条连接线， 并不只代表单线连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 1020内的模拟开关组 1026， 使显示屏各电极线与显示 选通输出电路 1024的各输出端连通， 控制电路 1021让显示选通输出电路 1024向所连 接的显示屏行电极 1011、列电极 1012和公共电极 1013输送显示驱动信号，显示屏 1010 处于显示驱动状态。
在触控探测时段，控制电路 1021让模拟开关组 1026，每次只让一条显示屏电极线， 也可以每次让多条显示屏电极线， 通过触控信号采样电阻 1031、 1032 与触控激励源 1023连通； 其余的显示屏电极直接与触控激励源 1023连通； 触控电路 1025通过分别 检测各检测点上触控信号的变化， 同时对显示屏 1010的多个区域进行触控探测， 来判 断显示屏 1010是否被触摸、 哪些区域被触摸、 哪些行列电极线的位置被触摸， 显示屏 1010处于触控探测状态。 由探测到的被触行电极线和被触列电极线的交叉点， 确定出 被触点位置。
让触控式平板显示器 1000反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。 具体实施方式十一
如图 11所示， 实施例 ^—与实施例十的不同之处在于： 在实施例 ^—中， 构成显 示 /触控信号选通输出电路的模拟开关组 1126是由多位单刀多掷模拟开关组成，其连接 方式和工作原理与具体实施例十相同。 具体实施方式十二
如图 12所示的触控式平板显示器 1200， 包括显示屏 1210、 驱动电路 1220。 驱动 电路 1220包括控制电路 1221、 提供显示驱动能量的显示驱动源 1222、 提供触控激励 能量的触控激励源 1223、 显示选通输出电路 1224、 触控电路 1225、 显示 /触控信号选 通输出电路等。 显示 /触控信号选通输出电路是由模拟开关组 1226 组成， 模拟开关组 1226是由多位单刀单掷模拟开关组成的多刀多掷模拟开关组。显示屏 1210具有显示屏 行电极 1211和列电极 1212等。显示选通输出电路 1224的输入端连接显示驱动源 1222; 显示选通输出电路 1224的各输出端分别连接模拟开关组 1226各模拟开关的一个输入 端； 模拟开关组 1226各模拟开关的第二个输入端， 分别通过触控电路 1225的触控信 号采样元件 1231—同连接触控激励源 1223 ; 模拟开关组 1226各模拟开关的第三个输 入端， 分别通过平衡元件 1232—同连接触控激励源 1223 ; 模拟开关组 1226各模拟开 关的输出端， 分别连接显示屏行电极 1211和列电极 1212的各电极线。 在模拟开关组 1226与触控信号采样元件 1231之间的连接点上，设置对应于显示屏各电极线的触控信 号检测点 12310， 再连接触控电路 1225， 触控电路 1225检测检测点上电位的变化； 电 位测量的参考端点， 可以设在触控激励源 1223 的输出端， 也可以设在驱动电路 1220 的公共地端， 也可以设在驱动电路 1220的某一特定的参考点。 控制电路 1221让模拟 开关组 1226使显示屏各电极线， 或与显示选通输出电路 1224的各输出端连通， 显示 选通输出电路 1224向所连接的显示屏行电极 1211和列电极 1212各电极线输送显示驱 动信号； 或与触控激励源 1223连通， 触控激励源 1223向所连接的显示屏行电极 1211 和列电极 1212各电极线施加触控激励信号。 图 12中的各条连接线， 并不只代表单线 连接， 也代表多线的连接关系。
上述触控式平板显示器按如下方式工作：
在显示驱动时段， 驱动电路 1220内的模拟开关组 1226， 使显示屏各电极线与显示 选通输出电路 1224的各输出端连通， 控制电路 1221让显示选通输出电路 1224向所连 接的显示屏行电极 1211和列电极 1212输送显示驱动信号， 显示屏 1210处于显示驱动 状态。
在触控探测时段，控制电路 1221让模拟开关组 1226，每次只让一条显示屏电极线， 通过触控信号釆样元件 1231与触控激励源 1223连通； 其余的显示屏电极通过平衡元 件 1232与触控激励源 1223连通； 触控电路 1225通过逐次检测触控信号检测点上触控 信号的变化， 来判断显示屏 1210是否被触摸、 哪些行列电极线的位置被触摸， 显示屏 1210处于触控探测状态。 由探测到的被触行电极线和被触列电极线的交叉点， 确定出 被触点位置。
让触控式平板显示器 1200反复在显示驱动时段和触控探测时段间转换， 显示驱动 和触控探测时分复用显示屏电极， 形成既可显示又可触控的触控式平板显示器。
判断被触电极线的条件， 可以检测到流经的触控信号变化最大的、 并超过某设定 阈值的电极线为被触电极线； 也可不以检测到流经的触控信号变化最大的、 并超过某 设定阈值的电极线为被触电极线， 而只以检测到流经的触控信号变化超过某设定阈值 的电极线为被触电极线， 让触控式平板显示器允许同时多点触控。
触控信号采样元件和平衡元件可以是单一电阻或电容或电感的无源器件， 也可以 是多种无源器件的组合， 也可以是单一的有源器件， 也可以是具有有源器件的电路单 元。 以上内容是结合具体的优选实施方式对本发明所作的进一歩详细说明， 不能认定 本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干简单推演或替换， 都应当视为属于本 发明的保护范围。

Claims

权 利 要 求 书
1、 一种触控式平板显示器， 由显示屏和驱动电路等组成， 驱动电路内又包括显示 驱动电路和触控电路等， 显示驱动电路具有提供显示驱动能量的显示驱动源和显示选 通输出电路， 显示驱动电路内的显示选通输出电路各输出端， 分别连接显示 /触控信号 选通输出电路或显示 /触控信号加载电路各单元的输入端， 显示 /触控信号选通输出电路 或显示 /触控信号加载电路各单元的输出端， 分别连接显示屏的各电极线。其特征在于: 显示 /触控信号选通输出电路或显示/触控信号加载电路的各单元通过一条或多条 电路路径连接触控激励源，显示 /触控信号选通输出电路或显示 /触控信号加载电路让多 于两条显示屏电极线同时连通提供触控激励能量的触控激励源， 触控电路分时检测触 控激励源连接显示屏各电极线的电路路径上触控信号的变化， 来判断各显示屏电极线 的位置是否被触碰。
2、 根据权利要求 1所述的触控式平板显示器， 其特征在于：
所述让显示屏各电极线连通触控激励源的显示 /触控信号选通输出电路或显示 /触 控信号加载电路各单元， 是通过一条电路路径连接触控激励源， 触控电路通过检测显 示 /触控信号选通输出电路或显示 /触控信号加载电路单元连接触控激励源路径上触控 信号的变化， 来判断显示屏电极线是否被触碰。
3、 根据权利要求 1所述的触控式平板显示器， 其特征在于：
所述让显示屏各电极线连通触控激励源的显示 /触控信号选通输出电路或显示 /触 控信号加载电路各单元， 是通过不少于两条电路路径连接触控激励源， 触控电路通过 检测显示 /触控信号选通输出电路或显示 /触控信号加载电路单元连接触控激励源的多 条路径中至少一条路径上触控信号的变化， 来判断显示屏电极线是否被触碰。
4、 根据权利要求 3所述的触控式平板显示器， 其特征在于：
所述显示 /触控信号选通输出电路或显示 /触控信号加载电路单元不少于两条连接 触控激励源的路径， 是通过选通电路来实现选择连通。
5、 根据权利要求 1所述的触控式平板显示器， 其特征在于：
所述触控电路检测触控信号的检测点， 设置在触控激励源和显示 /触控信号选通输 出电路或显示 /触控信号加载电路单元的连接路径上， 或设置在显示 /触控信号选通输出 电路或显示 /触控信号加载电路单元和显示屏电极线的连接路径上。
6、 根据权利要求 5所述的触控式平板显示器， 其特征在于：
所述检测触控信号的检测点是通过选通电路连接触控电路。 7、 根据权利要求 1所述的触控式平板显示器， 其特征在于： 所述触控电路的触控信号检测电路， 是无源元件， 或是有源元件， 或是多个元件 组成的电路单元。
S、 根据权利要求 1所述的触控式平板显示器， 其特征在于：
所述触控电路检测连接触控激励源多条路径中至少一条路径上的触控信号， 检测 的是电流信号和电压信号中的至少一种。
9、 根据权利要求 1所述的触控式平板显示器， 其特征在于：
所述触控电路检测连接触控激励源多条路径中至少一条路径上的触控信号， 检测 的是幅值、 时间、 相位、 频率信号和脉冲数中的至少一种。
10、 根据权利要求 1所述的触控式平板显示器， 其特征在于：
所述连接显示屏各电极线的触控激励源， 可以是同一触控激励源的同一输出端， 也可以是同一触控激励源的不同输出端， 也可以是不同触控激励源。
11、 根据权利要求 1所述的触控式平板显示器， 其特征在于：
所述触控激励源是交流电源、 也可以是交直流混合电源， 输出波形可以是方波、 也可以是正弦波、 也可以方波或正弦波与直流的叠加波、 也可以是其他波形。
12、 根据权利要求 1所述的触控式平板显示器， 其特征在于- 所述驱动电路通过显示 /触控信号选通输出电路或显示 /触控信号加载电路对显示 屏电极线输出的触控信号的频率不小于 50K Hz。
PCT/CN2009/075272 2009-07-08 2009-12-02 一种触控式平板显示器 WO2011003253A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2012518725A JP2012532389A (ja) 2009-07-08 2009-12-02 タッチフラットパネルディスプレイの駆動の実現
EP09847004A EP2453339A1 (en) 2009-07-08 2009-12-02 Touch-control flat panel display
US13/343,414 US20120098776A1 (en) 2009-07-08 2012-01-04 Implementation of drive of touch flat panel display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910139906.0 2009-07-08
CN200910139906.0A CN101943961B (zh) 2009-07-08 2009-07-08 一种触控式平板显示器的驱动实现

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/343,414 Continuation US20120098776A1 (en) 2009-07-08 2012-01-04 Implementation of drive of touch flat panel display

Publications (1)

Publication Number Publication Date
WO2011003253A1 true WO2011003253A1 (zh) 2011-01-13

Family

ID=43428744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2009/075272 WO2011003253A1 (zh) 2009-07-08 2009-12-02 一种触控式平板显示器

Country Status (5)

Country Link
US (1) US20120098776A1 (zh)
EP (1) EP2453339A1 (zh)
JP (1) JP2012532389A (zh)
CN (1) CN101943961B (zh)
WO (1) WO2011003253A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9400576B2 (en) 2011-07-19 2016-07-26 Apple Inc. Touch sensor arrangements for organic light-emitting diode displays
CN109791445A (zh) * 2016-10-06 2019-05-21 株式会社和冠 触控笔及控制器

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090174676A1 (en) 2008-01-04 2009-07-09 Apple Inc. Motion component dominance factors for motion locking of touch sensor data
CN103109314B (zh) * 2010-04-28 2016-05-04 株式会社半导体能源研究所 半导体显示装置及其驱动方法
JP5257481B2 (ja) * 2011-03-29 2013-08-07 Ｓｍｋ株式会社 静電容量式タッチパネル
CN104067205B (zh) * 2011-12-22 2016-08-24 深圳市汇顶科技股份有限公司 部分地与lcd显示器集成的电容式触摸感应器
US8711119B2 (en) * 2012-04-03 2014-04-29 O2Micro, Inc. Display systems with touch screens
KR101606874B1 (ko) * 2012-12-28 2016-03-28 엘지디스플레이 주식회사 터치스크린 일체형 표시장치 및 그 구동 방법
CN103941926B (zh) * 2013-01-18 2017-09-01 瀚宇彩晶股份有限公司 具有触控功能的显示装置
JP6027903B2 (ja) * 2013-01-30 2016-11-16 シナプティクス・ジャパン合同会社 半導体装置
US9336723B2 (en) 2013-02-13 2016-05-10 Apple Inc. In-cell touch for LED
TW201441746A (zh) * 2013-04-25 2014-11-01 Rich Ip Technology Inc 具有面內轉向液晶結構之觸控顯示器
CN103294319A (zh) * 2013-06-06 2013-09-11 敦泰科技有限公司 电容式触摸屏
CN103294321A (zh) * 2013-06-06 2013-09-11 敦泰科技有限公司 一种触控显示装置
TWI507957B (zh) * 2013-07-22 2015-11-11 Chunghwa Picture Tubes Ltd 驅動觸控顯示器的方法及提升訊雜比的觸控顯示器
US10133419B2 (en) * 2013-08-07 2018-11-20 Synaptics Incorporated Flexible processing module for different integrated touch and display configurations
US9557860B2 (en) 2013-08-22 2017-01-31 Synaptics Incorporated Switchable area enhancement for flexible capacitive sensing
KR102081606B1 (ko) 2013-09-04 2020-02-26 엘지디스플레이 주식회사 터치 ic 및 이를 이용한 터치 스크린 일체형 표시장치
US9298299B2 (en) 2013-10-02 2016-03-29 Synaptics Incorporated Multi-sensor touch integrated display driver configuration for capacitive sensing devices
US10209813B2 (en) 2013-12-13 2019-02-19 Apple Inc. Integrated touch and display architectures for self-capacitive touch sensors
KR102216554B1 (ko) * 2014-03-14 2021-02-17 삼성디스플레이 주식회사 터치 패널 및 이를 포함하는 표시 장치
WO2015178920A1 (en) 2014-05-22 2015-11-26 Onamp Research Llc Panel bootstrapping architectures for in-cell self-capacitance
US10289251B2 (en) 2014-06-27 2019-05-14 Apple Inc. Reducing floating ground effects in pixelated self-capacitance touch screens
CN107077260B (zh) 2014-09-22 2020-05-12 苹果公司 触摸控制器和用于触摸传感器面板的方法
CN107077262B (zh) 2014-10-27 2020-11-10 苹果公司 像素化自电容水排斥
CN104536609B (zh) * 2014-12-30 2018-01-30 深圳市华星光电技术有限公司 具有触控功能的显示面板以及故障检测方法
CN104503620A (zh) * 2014-12-31 2015-04-08 深圳市华星光电技术有限公司 一种触摸屏驱动电路、触摸屏和电子终端
EP3224699B1 (en) * 2015-02-02 2018-10-03 Apple Inc. Flexible self-capacitance and mutual capacitance touch sensing system architecture
US10488992B2 (en) 2015-03-10 2019-11-26 Apple Inc. Multi-chip touch architecture for scalability
CN106293177B (zh) * 2015-05-29 2020-02-04 鸿富锦精密工业（深圳）有限公司 内嵌式触控显示面板
WO2017010454A1 (ja) * 2015-07-14 2017-01-19 シャープ株式会社 タッチパネルコントローラおよび電子機器
US10365773B2 (en) 2015-09-30 2019-07-30 Apple Inc. Flexible scan plan using coarse mutual capacitance and fully-guarded measurements
WO2018023089A1 (en) 2016-07-29 2018-02-01 Apple Inc. Touch sensor panel with multi-power domain chip configuration
KR102586113B1 (ko) * 2016-08-31 2023-10-06 엘지디스플레이 주식회사 터치스크린 내장형 표시패널, 터치스크린 내장형 표시장치, 통합 구동 회로 및 구동 방법
AU2017208277B2 (en) 2016-09-06 2018-12-20 Apple Inc. Back of cover touch sensors
CN106406614B (zh) * 2016-09-18 2019-03-15 京东方科技集团股份有限公司 一种分时驱动电路及显示面板
US10642418B2 (en) 2017-04-20 2020-05-05 Apple Inc. Finger tracking in wet environment
US10838530B2 (en) * 2017-09-15 2020-11-17 Sigmasense, Llc. Touchscreen display with concurrent touch and display operations
KR102079389B1 (ko) * 2017-09-29 2020-02-19 주식회사 센트론 수동형 유기 발광 다이오드 디스플레이
KR102079387B1 (ko) * 2017-09-29 2020-02-19 주식회사 센트론 수동형 유기 발광 다이오드 디스플레이 및 그 제어방법
WO2019178847A1 (zh) * 2018-03-23 2019-09-26 深圳市柔宇科技有限公司 触摸显示驱动方法与触摸显示屏
CN110737344B (zh) * 2018-07-19 2023-06-30 敦泰电子有限公司 触控显示控制电路、控制方法以及电子设备
US11262869B2 (en) 2018-07-19 2022-03-01 Focaltech Electronics, Ltd. Touch display control circuit, control method and electronic device
CN109471557B (zh) * 2018-10-31 2021-10-26 合肥鑫晟光电科技有限公司 一种拼接显示屏的控制电路、控制方法及拼接显示装置
US11157109B1 (en) 2019-09-06 2021-10-26 Apple Inc. Touch sensing with water rejection
CN111077193B (zh) * 2019-12-31 2021-10-22 北京航空航天大学 一种电容传感器及对其电容信号进行处理的成像定位方法
CN111158054B (zh) * 2019-12-31 2021-04-06 浙江大学 一种基于led屏的被动物体探测显示系统及方法
US11662867B1 (en) 2020-05-30 2023-05-30 Apple Inc. Hover detection on a touch sensor panel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000242429A (ja) * 1999-02-18 2000-09-08 Canon Inc タッチパネル装置及びその制御方法
US20070070047A1 (en) * 2005-09-26 2007-03-29 Jin Jeon Display panel, display device having the same and method of detecting touch position
CN1940842A (zh) * 2005-07-14 2007-04-04 深圳市联思精密机器有限公司 具有触控功能的平板显示器
CN101017419A (zh) * 2005-06-30 2007-08-15 深圳市联思精密机器有限公司 触控式平板显示器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5049865A (en) * 1987-10-29 1991-09-17 Nec Corporation Display apparatus
TW201005716A (en) * 2008-07-24 2010-02-01 Applied Green Light Taiwan Inc Electronic display module and displaying method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000242429A (ja) * 1999-02-18 2000-09-08 Canon Inc タッチパネル装置及びその制御方法
CN101017419A (zh) * 2005-06-30 2007-08-15 深圳市联思精密机器有限公司 触控式平板显示器
CN1940842A (zh) * 2005-07-14 2007-04-04 深圳市联思精密机器有限公司 具有触控功能的平板显示器
US20070070047A1 (en) * 2005-09-26 2007-03-29 Jin Jeon Display panel, display device having the same and method of detecting touch position

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9400576B2 (en) 2011-07-19 2016-07-26 Apple Inc. Touch sensor arrangements for organic light-emitting diode displays
US9939978B2 (en) 2011-07-19 2018-04-10 Apple Inc Touch sensitive displays
CN109791445A (zh) * 2016-10-06 2019-05-21 株式会社和冠 触控笔及控制器
CN109791445B (zh) * 2016-10-06 2023-06-30 株式会社和冠 触控笔及控制器

Also Published As

Publication number Publication date
EP2453339A1 (en) 2012-05-16
CN101943961A (zh) 2011-01-12
JP2012532389A (ja) 2012-12-13
CN101943961B (zh) 2014-08-20
US20120098776A1 (en) 2012-04-26

Similar Documents

Publication Publication Date Title
WO2011003253A1 (zh) 一种触控式平板显示器
WO2010133070A1 (zh) 触控式平板显示器及其驱动电路
JP5964929B2 (ja) タッチスクリーンパネル一体型表示装置及びその駆動方法
US8610680B2 (en) Touch screen flat panel display
JP5481740B2 (ja) 表示によるタッチへの影響を解消可能なタッチディスプレイ
EP2887185A1 (en) Display device integrated with touch screen panel and method of driving the same
US10101842B2 (en) Method for driving touch display apparatus and touch display apparatus
US20150185935A1 (en) Touch system, touch panel, and display device
WO2021062986A1 (zh) 触控显示面板和显示装置
US10318048B2 (en) Array substrate, display panel and driving method thereof, and display device
WO2011035491A1 (zh) 一种触控屏
CN105739787B (zh) 一种阵列基板和显示面板
TW201042524A (en) Information input device and display device
JP2018063666A5 (zh)
WO2013056472A1 (zh) 一种有源触控系统的驱动方法
WO2015074421A1 (zh) 触摸屏及其驱动方法和显示装置
KR20110034188A (ko) 액정 표시패널, 이를 포함하는 액정 표시장치 및 액정 표시장치의 구동 방법
CN107037929A (zh) 一种触控显示面板及其显示装置
EP3040764B1 (en) In-cell touch liquid crystal display apparatus
US10133427B2 (en) Embedded touch-screen display panel
CN106228923B (zh) 一种驱动电路、驱动方法及显示面板
CN107203295A (zh) 一种触控显示面板、显示装置及其驱动方法
CN106292025B (zh) 触控显示装置
CN109448658A (zh) 过流保护电路及显示装置
CN201622548U (zh) 一种触控式平板显示器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09847004

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2009847004

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2012518725

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE