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WO2007054018A1 - Digital-analog touch control plane display - Google Patents

Digital-analog touch control plane display Download PDF

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Publication number
WO2007054018A1
WO2007054018A1 PCT/CN2006/002983 CN2006002983W WO2007054018A1 WO 2007054018 A1 WO2007054018 A1 WO 2007054018A1 CN 2006002983 W CN2006002983 W CN 2006002983W WO 2007054018 A1 WO2007054018 A1 WO 2007054018A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch
electrode
display
electrodes
circuit
Prior art date
Application number
PCT/CN2006/002983
Other languages
French (fr)
Chinese (zh)
Inventor
Qiliang Chen
Shaoguang Chen
Meiying Chen
Original Assignee
Qiliang Chen
Shaoguang Chen
Meiying Chen
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 Qiliang Chen, Shaoguang Chen, Meiying Chen filed Critical Qiliang Chen
Publication of WO2007054018A1 publication Critical patent/WO2007054018A1/en

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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
    • G06F3/044—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
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means

Definitions

  • the present invention relates to a touch screen and a flat panel display, and in particular to a touch panel display. Background technique
  • the digital capacitive touch screen is composed of two layers of electrodes each having a plurality of parallel electrodes.
  • the two layers of electrodes are orthogonal to each other.
  • the capacitance, and the leakage current flowing from the coupling capacitor determine the touch position by detecting two electrodes on the two electrodes that are orthogonal to each other and form a coupling capacitance with the finger.
  • This method is only suitable for coarse positioning, and it is unevenly displayed when placed in front of the display. When careful positioning is required, it is necessary to make a double-layered very fine electrode, which is too expensive.
  • An analog capacitive touch screen is composed of a single-layer electrode on the whole surface, and input current from four corner electrodes of a single-layer electrode.
  • Another analog capacitive touch screen is composed of two layers of electrodes each having a plurality of parallel electrodes.
  • the two layers of electrodes are orthogonal to each other.
  • the finger and the touch screen are The electrodes form a coupling capacitor, and the leakage current flowing from the coupling capacitor detects the lateral or vertical touch position on the two mutually orthogonal electrodes by detecting the magnitude of the current flowing out of each electrode.
  • This method can be finely positioned, and the drift problem is also improved, but it becomes a double-layer electrode, which increases the thickness and manufacturing difficulty of the touch screen, and is placed in front of the display to make the display uneven.
  • the current electromagnetic touch screen can also be divided into digital and analog modes.
  • the analog electromagnetic touch screen is composed of two layers of electrodes, each layer has a plurality of annular or other shaped antenna electrodes, and the long sides of the two layers of electrodes are orthogonal to each other when the stylus with signal emission function contacts the touch screen.
  • the mutually orthogonal antenna electrodes receive the electromagnetic signals emitted by the stylus and obtain the position of the stylus by calculation. This method can be finely positioned, but the control circuit is computationally intensive, costly, and inaccurate in positioning at the edges.
  • the digital electromagnetic touch screen is also composed of two layers of electrodes, each layer has a plurality of linear antenna electrodes, and the two layers of electrodes are orthogonal to each other.
  • the antenna electrode receives the electromagnetic signal emitted by the stylus, and the maximum antenna electrode that receives the electromagnetic signal through each layer respectively obtains a horizontal or vertical touch position. This method requires the preparation of a double-layered, very fine electrode, which is too costly.
  • a flat panel display with a touch screen stacks the split touch screen with the display screen, detects the planar position of the touch point through the display, and positions the cursor on the display screen following the touch point.
  • the cascading of the touch screen and the display screen makes the touch panel display thicker and heavier and the cost increases; when the touch screen is placed in front of the display screen, the reflection generated by the touch screen sensing electrode makes the display uneven and strong. The contrast is reduced in the external light environment, which affects the display effect. Integrating the touchpad and the display to make the flat panel display with touch function lighter and thinner is the direction of people's efforts.
  • the integration of the display screen and the touchpad is mainly cascading and inlaid.
  • the cascading is placed before or after the top surface of the display screen, and the display screen and the touch panel are independently displayed and touched.
  • Control tasks Chinese patent (CN20010141451, MINXIANG INDUSTRY CO LTD, 2001), Finnish patent (FI19960002692, NOKIA MOBILE PHONES LTD, 1996), Japanese patent (JP19850161986, CANON KK, 1985), (JP19900095167, NIPPON TELEGRAPH & TELEPHONE, 1990) , (JP19930306286, PFU LTD, 1993), (JP19980014850, NISSHA PRINTING, 1998), (JP19990142260, MIMA I DENSHI BUHIN KK, 1999), Korean Patent (KR20000084115, YU HWAN SE0NG; LIM J00-S00, 2000), (KR20020083301 , BANG Y0NG IK
  • Taiwan patents TW556141, AU OPTRONICS CORP, 2002
  • US patents US6215476, APPLE COMPUTER, 2001
  • other patents all proposed resistive, capacitive, electromagnetic touch
  • Various stacking schemes of the control panel and the display screen but before the touch panel is placed on the top surface of the display screen, it will affect the display brightness, contrast, sharpness, color, etc.; the electromagnetic touch panel is placed on the bottom surface of the display screen.
  • the alignment of the touchpad electrode and the display electrode is difficult, and the brightness of the display is also affected; and the method of lamination increases the overall thickness of the display; the complexity of the structure leads to a decrease in reliability, and is caused by the production process. The complexity of assembly and assembly is also costly.
  • the mosaic type embeds the touch sensor into the display screen, and a sensor (mostly an optical sensor) is disposed beside each display pixel, and the display pixel and the sensor are connected by a double electrode, and the display driving signal and the touch detection signal are respectively transmitted.
  • Korean patent JUNG Y0NG CHAE; YANG DONG YU, 2003), (R20030077574, CHOI J00N-H00; J00 IN-S00, 2003), German patent (GB0304587.
  • Taiwan patent TW20020116058, LEE YU-TUAN, 2002
  • the change of capacitance between the boxes is caused by the change of the thickness of the box caused by the touch pressure.
  • the support between the boxes makes it necessary to change the thickness of the liquid crystal display, and changing the thickness of the liquid crystal display must affect the display.
  • the dielectric anisotropy of the liquid crystal material causes the capacitance between the boxes to change with the display.
  • the charging method in the patent excludes the change of the capacitance between the cells caused by the dielectric anisotropy of the liquid crystal material and affects the display. Therefore, it is not preferable to detect the touch capacitance of the liquid crystal display to detect the touch.
  • Chinese patents such as 200510080825X and 2005100861285 are proposed to allow the display panel of the flat panel display to be time-divided or to be connected to the display driving circuit or the touch panel through a plurality of analog switch groups.
  • the control signal circuit is connected, and the display row electrode and the column electrode are used as the touch electrode to sense the touch;
  • the Chinese patent No. 2005100861285 and the like are proposed, and the display panel electrode of the flat panel display is simultaneously displayed with the display driving circuit and the touch through the signal loading circuit.
  • the signal circuit is connected, and the display row electrode and the column electrode are used as the touch electrode to sense the touch; so that no additional sensor is needed in the display screen of the existing structure, so that the flat panel display screen has the capability of sensing the touch signal.
  • the electrodes in the upper layer shield the touch signals of the electrodes in the lower layer, so that the reference of the vertical and horizontal touch sensing is different, and the touch detection is performed. Bring difficulties. Summary of the invention
  • the present invention aims to provide a single-layer electrode using a flat panel display as a touch electrode, and to sense touch positioning by a combination of digital and analog methods.
  • the flat panel display not only has a display function, but also has a touch function, which is versatile.
  • a typical dot matrix flat panel display includes display pixels, row electrodes (scan electrodes) for transmitting display drive scan signals, and column electrodes (data electrodes) for data signals, such as TN-LCD and STN.
  • a passive flat panel display such as an LCD
  • a pixel and an electrode share a conductive film at a position of a display pixel
  • an active flat panel display such as a TFT-LCD
  • a pixel input port is connected to a drain of the TFT, and the TFT
  • the gate and source are connected to the scan electrode and the signal electrode, respectively.
  • the electrode (row electrode or column electrode) in a certain direction of the flat panel display screen is used as the touch electrode to sense the touch, and both ends of the electrode in the direction are connected to the touch signal circuit, and the two are positive.
  • different touch positioning methods are used, and the position of the touch electrode is determined by comparing the difference of the touch signals sensed by different electrodes in a direction perpendicular to the electrode by a digital touch positioning method;
  • the direction of the electrode is determined by the analog touch positioning method, and the position of the touch point on the touch electrode is determined by comparing the difference between the touch signals at both ends of the touch electrode; thereby obtaining the position of the touch point on the touch screen plane.
  • the sensing of the touch signal by the electrode can be in various forms, such as a capacitive type, an electromagnetic type, a photoelectric type, and the like.
  • the capacitive touch solution is to make the electrodes of one direction of the flat panel display display such as the row electrodes as the lead ends, so that one end of each electrode passes through the analog switch or communicates with the display driving circuit or with a touch.
  • the signal circuit is connected such that the other end of the electrode is passed through an analog switch or suspended or in communication with another touch signal circuit.
  • the analog switch is controlled by the control circuit, so that the electrode communicates with the display driving circuit at one end to transmit the display driving signal, and the other end is in a floating state; at the next moment, the control circuit connects the two ends of the electrode to the touch signal circuit at the same time to transmit the touch. The signal is then returned to the state where the previous moment is connected to the display driving circuit and the other end is in a floating state, so that the switching is repeated.
  • the electrode is used as the touch electrode to sense the touch, and is positioned in a digital manner perpendicular to the direction of the electrode.
  • the finger and the display are The electrodes form a coupling capacitor, and the leakage current flowing from the coupling capacitor determines the touch position by detecting the electrode forming the coupling capacitance with the finger; the analog position is parallel to the electrode direction, and is respectively connected from the touch signal circuit.
  • the two ends of the display electrode input current to the electrode.
  • the finger forms a coupling capacitance with the electrode, and the leakage current flowing from the coupling capacitor detects and compares the electrical signals flowing to the electrodes at both ends of the electrode.
  • the touch position from which the current flows from the finger is calculated, and the touch position is located thereby; the touch position is determined by the touch positions in two orthogonal directions.
  • the electrical signal for detecting and comparing from the two ends of the electrode may be a current signal or a voltage signal; it may be an amplitude signal, which may be a pulse width signal, and may be a frequency signal or a phase signal.
  • the electromagnetic touch scheme is to make the electrodes of a certain direction of the flat panel display screen, such as the row electrodes, as the lead ends, so that one end of each electrode passes through the analog switch or communicates with the display driving circuit or with a touch.
  • the signal circuit is connected such that the other end of the electrode is passed through an analog switch or suspended or in communication with another touch signal circuit.
  • the analog switch is controlled by the control circuit, so that the electrode communicates with the display driving circuit at one end to transmit the display driving signal, and the other end is in a floating state, so that the electrodes are respectively connected with the touch signal circuit to transmit the touch signal at the two ends at the next moment, and then Then, one end of the previous time is connected to the display driving circuit and the other end is in a floating state, so that the switching is repeated.
  • the electrode is used as the touch antenna electrode to sense the touch, and is vertically positioned in the direction perpendicular to the electrode to be positioned.
  • the antenna electrode receives the electromagnetic signal emitted by the stylus, determines the touch electrode by detecting the electrode that receives the touch electromagnetic signal, and uses the analog method to locate in parallel with the electrode direction.
  • the touch electromagnetic signals are respectively sampled from the two ends of each electrode of the parallel electrode group, and the position of the touch point on the touch electrode is determined by comparing the difference between the touch signals at both ends of the touch electrode; The touch position is obtained by the position of the touch point on the touch screen plane.
  • the touch electromagnetic signal sampled from both ends of the electrode and used for comparison may be an amplitude signal, may be a pulse width signal, may be a frequency signal, or may be a phase signal.
  • a sense amplifier can be disposed in the touch signal circuit; in order to process the read signal, an analog-to-digital converter can be disposed in the touch signal circuit.
  • the electrode with the largest signal is used as the touch positioning point, or the middle position of the touch electrode for detecting the touch signal is the touch positioning point.
  • the analog switch that connects one end of the display electrode or the display driving circuit or communicates with a touch signal circuit may be a single-pole double-throw analog switch, one end of the switch is fixedly connected to the display electrode, and the other ends are connected to the display driving circuit and the connection touch
  • the control signal circuit allows the switch to switch the display electrode between the display display driving circuit or the connected touch signal circuit; the analog switch that connects one end of the display electrode to the display driving circuit or communicates with a touch signal circuit, It can also be two single-pole single-throw analog switches.
  • the display electrode is connected to the display drive circuit through a single-pole single-throw analog switch, and is connected to the touch signal circuit through another single-pole single-throw analog switch.
  • the control circuit allows two of the same display electrodes to be connected. A single-pole single-throw analog switch is not connected at the same time.
  • Each of the switches of the analog switch group that connects one end of each of the electrodes of the display screen to the display drive circuit or to a touch signal circuit, and an analog switch that causes the other end of each electrode to be either suspended or connected to another touch signal circuit
  • Each switch in the group may be switched by the scanning mode control one by one, or may be controlled by the simultaneous mode.
  • the switching between the display driving circuit and the touch signal circuit may be when the display part electrode is connected to the display driving circuit, and another part of the electrode is connected to the touch signal circuit, that is, the display electrode is switched from the connected display driving circuit to Connected touch signal circuit is in display driver
  • the switching of the analog switch group between the display driving circuit and the touch signal circuit may also be when the display driving signal is stopped at any electrode of the display screen.
  • the display electrode is switched from the connected display driving circuit to the touch signal circuit, that is, the display electrode is switched from the connected display driving circuit to the connected touch signal circuit, which is performed outside the frame of the display driving, that is, the display electrode is Switching the connected display drive circuit to the connected touch signal circuit is performed between frames of the display drive.
  • a fixed level signal may be output to the display electrode that is not turned from the connected display driving circuit to the touch signal circuit, in particular It is zero level.
  • the flat panel display may be a TN type STN type or TFT type liquid crystal display, a 0 LED display, a PDP display, or another flat panel display.
  • the display electrode used to transmit the display signal and to sense and transmit the touch may be the row electrode of the display screen or the column electrode of the display screen.
  • the display driving electrode of the display screen also functions as a touch signal sensing electrode, and the digital signal combined touch signal sensing method eliminates the need to add any process during the manufacturing process of the display without the touch function. New processes, materials and elements make it a display with the ability to sense touch signals. BRIEF DESCRIPTION OF THE DRAWINGS
  • Figure 1 is a schematic diagram of the electrical connection of a digital-to-analog capacitive touch-screen LCD with a row electrode as a touch electrode.
  • FIG. 2 is a schematic diagram of electrical connection of a digital-analog electromagnetic touch passive liquid crystal display with a row electrode as a touch electrode.
  • FIG. 3 is a schematic diagram of electrical connection of a digital-analog electromagnetic touch active liquid crystal display with a column electrode as a touch electrode.
  • FIG. 1 a digital-to-analog capacitive touch liquid crystal display 100 that uses a row electrode as a touch electrode in a display-driven frame.
  • the liquid crystal display 100 has a display substrate 110, a lower display substrate 120, a row electrode 111, a column electrode 121, a row display driving circuit 130, a column display driving circuit 140, a touch signal circuit 150, and a single-pole double-throw analog switch group.
  • the row electrodes 111 are specifically formed to have terminals from both sides and are connected to the single-pole double-throw analog switch group 160 and the single-pole single-throw analog switch group 170, respectively.
  • the normal state is that the single-pole double-throw analog switch group 160 causes one end of the row electrode 111 to communicate with the display driving circuit 130 to transmit a display driving signal, and the single-pole single-throw analog switch group 170 causes the other end of the row electrode 111 to be in a floating state; the control circuit 180 makes the single-pole double-throwing
  • the analog switch group 160 and the single-pole single-throw analog switch group 170 respectively connect the two ends of the electrodes of the row electrode 111 to the touch signal circuit 150 to transmit the touch signals, and then return to the normal end.
  • the display driving circuit 130 is in a state in which the other end is in a floating state, and thus the switching is repeated.
  • the touch signal circuit 150 outputs current from the two ends of each electrode of the row electrode 111 to the electrode, and when the human finger 190 touches the touch screen, the finger 190 and the row electrode 111 form a coupling capacitance, and the leakage current flowing from the coupling capacitor, the touch signal circuit 150 checks whether the touched current exceeds a certain threshold, and when the number of electrodes exceeding the threshold is an odd number
  • the middle electrode is used as the touch electrode.
  • one of the middle two electrodes is used as a touch electrode, and the touch positioning position in one direction is determined by a digital method;
  • the touch positioning point is determined by the touch positions of the two orthogonal directions, so that the liquid crystal display 100 is used
  • the display is also used for touch, and no separate touch screen is needed.
  • the second embodiment of the present invention is also shown in FIG. 1.
  • a digital-to-analog capacitive touch liquid crystal display 100 with a row electrode as a touch electrode is performed between frames of display driving.
  • the liquid crystal display 100 has a display substrate 110, a lower display substrate 120, a row electrode 111, a column electrode 121, a row display driving circuit 130, a column display driving circuit 140, a touch signal circuit 150, and a single-pole double-throw analog switch group. 160 and single-pole single-throw analog switch group 170, control circuit 180, etc. to make.
  • the row electrodes 111 are specifically formed to have terminals from both sides and are connected to the single-pole double-throw analog switch group 160 and the single-pole single-throw analog switch group 170, respectively.
  • the normal state is that the single-pole double-throw analog switch group 160 causes one end of the row electrode 111 to communicate with the display driving circuit 130 to transmit a display driving signal, and the single-pole single-throw analog switch group 170 is turned off to make the other end of the row electrode 111 in a floating state; the control circuit 180 is displaying Between the frames of the driving, the row display driving circuit 130 and the column display driving circuit 140 stop outputting the driving signal to any of the electrodes of the display screen, and only output the zero potential signal, and then the single-pole double-throwing analog switch group 160 and the single-pole single-single The throwing analog switch group 170 disconnects the electrodes of the row electrode 111 from the row display driving circuit 130 one by one, and connects the two ends of the electrode to the touch signal circuit 150 to transmit the touch signal, and then returns.
  • One end of the normal row electrode 111 is connected to the row display driving circuit 130 and the other end is suspended.
  • the touch signal circuit 150 outputs current from the two ends of each electrode of the row electrode 111 to the electrode, and when the finger 190 of the person touches the touch screen, the finger 190 and the row electrode 111 form a coupling capacitance, and the leakage current flowing from the coupling capacitor, the touch signal circuit 150 checks whether the touched current exceeds a certain threshold, and the number of electrodes exceeding the threshold is an odd number.
  • the middle electrode is used as the touch electrode.
  • one of the middle two electrodes is used as the touch electrode, and the touch positioning position in one direction is determined by a digital method; and the touch electrode is compared.
  • the two sides respectively flow to the magnitude of the electrode current, and the touch positioning position of the finger 190 in the other direction is calculated by an analog method; the touch positioning point is determined by the touch positions of the two orthogonal directions, so that the liquid crystal display 100 is It is used for display and for touch, and no separate touch screen is required.
  • FIG. 2 The third embodiment of the present invention is shown in FIG. 2 : a digital-analog electromagnetic touch passive liquid crystal display 200 with a row electrode as a touch electrode.
  • the group 260 is composed of a single-pole single-throw analog switch group 270, a control circuit 280, and the like.
  • the row electrodes 211 are specifically made to have terminals from both sides and are connected to the single-pole double-throw simulation switch group 260 and the single-pole single-throw analog switch group 270, respectively.
  • the normal state is a single-pole double-throw analog switch group 260 that causes the row electrodes 211 to be
  • the end-to-row display driving circuit 230 communicates with the display display driving signal, and the single-pole single-throw analog switch group 270 is turned off to make the other end of the row electrode 211 in a floating state; the control circuit 280 allows the single-pole double-throwing analog switch group 260 and the single-pole single-throw analog switch group. 270 in the manner of scanning, the electrodes of the row electrode 211 are disconnected from the row display driving circuit 230 one by one, and the two ends are simultaneously connected with the touch signal circuit 250 to transmit the touch signal, and then return to the normal end and row.
  • the display driving circuit 230 is in a state in which the other end is in a floating state, and thus the switching is repeated.
  • the touch signal circuit 250 detects the electromagnetic touch signals at both ends of the electrodes of the row electrode 211 at the time when the two ends of the row electrodes 211 are respectively connected to the touch signal circuit 250, and the stylus pen 290 having the electromagnetic signal transmitting function is detected.
  • the touch screen is touched, a part of the electrodes of the row electrode 211 receives the electromagnetic touch signal emitted by the stylus 290, and the touch signal circuit 250 detects the touch signal exceeding a certain threshold to check whether the touch is touched.
  • the middle electrode is used as the touch electrode
  • the number of electrodes exceeding the threshold is an even number
  • one of the middle two electrodes is used as the touch electrode, and the touch positioning position in one direction is determined by a digital method. Comparing the phase difference of the touch signals detected at the two ends of the touch electrode, and calculating the touch positioning position of the stylus 290 in another direction by an analog method; the touch positions through two orthogonal directions
  • the liquid crystal display 200 is used for both display and touch, and no separate touch screen is needed.
  • the fourth embodiment of the present invention is shown in FIG. 3: a digital-analog electromagnetic touch active liquid crystal display 300 in which one or more electrodes are touch electrodes.
  • the liquid crystal display 300 has a substrate glass 310, a row electrode 311, a column electrode 312, a display pixel 313, a display lower substrate glass 320, a row display driving circuit 330, a column display driving circuit 340, a touch signal circuit 350, and a single knife.
  • the double throw analog switch group 360 and the single pole single throw analog switch group 370, the control circuit 380, and the like are composed.
  • the column electrodes 312 are specifically made to have terminals from both sides and are connected to the single-pole double-throw simulation switch group 360 and the single-pole single-throw analog switch group 370, respectively.
  • the normal state is that the single-pole single-pole double-throw analog switch group 360 causes the column electrode 312-end to communicate with the column display driving circuit 340 to transmit a display driving signal, and the single-pole single-throw analog switch group 370 is turned off to make the other end of the column electrode 312 in a floating state;
  • the control circuit 380 causes the single-pole double-throw analog switch group 360 connected to the column display driving circuit 340 to disconnect one end of each electrode of the column electrode 312 from the column display driving circuit 340, and the single-pole double-throw analog switch group
  • the 360 and single-pole single-throw analog switch group 370 causes the electrodes of the column electrodes 312 to communicate with the touch signal circuit 350 at the same time to transmit the touch signals; and then return to the normal end and the column display driving circuit 340 is connected to the other end and is floating.
  • the touch signal circuit 350 detects the electromagnetic touch signals at both ends of the electrodes of the column electrodes 312 one by one in the manner of scanning, and has an electromagnetic signal.
  • the stylus 390 of the transmitting function contacts the touch screen
  • part of the electrodes of the column electrode 312 receives the electromagnetic touch signal emitted by the stylus 390, and the touch signal circuit 350 detects the touch signal exceeding a certain threshold. Whether the touch is performed.
  • the middle electrode is used as the touch electrode.
  • one of the middle two electrodes is used as the touch electrode, and a digital method is used to determine one.
  • the position of the touch position of the touch sensor; the phase difference of the touch signals detected at the two ends of the touch electrode is compared, and the touch position of the touch pen 390 in the other direction is calculated by an analog method;
  • the touch position in the intersecting direction determines the touch positioning point, so that the liquid crystal display 300 is used for both display and touch, and no separate touch screen is needed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Position Input By Displaying (AREA)

Abstract

A plane display device has row electrodes and column electrodes, wherein the electrodes in a direction are used as touch control electrodes for sensing touch control, and leading ends which are connected to a touch control signal circuit are formed on both ends of the electrodes in this direction. Different touch control positioning modes are used in the orthogonal direction, respectively. The digital touch control positioning mode is applied in the direction perpendicular to the electrodes, and the positions of the touch control electrodes are determined by comparing the difference of the touch control signals sensed by the different electrodes. The analog touch control positioning mode is applied in the direction parallel to the electrodes, and the positions of touch points on the touch control electrodes are determined by comparing the difference of the touch control signals on the ends of the touch control electrodes. Therefore, the position of touching point on a plane of the touch control screen can be obtained.

Description

说明书  Instruction manual
数模触控式平板显示器 技术领域  Digital-mode touch panel display
本发明涉及触控屏和平板显示器， 具体涉及触控式平板显示器。 背景技术  The present invention relates to a touch screen and a flat panel display, and in particular to a touch panel display. Background technique
目前的电容式触控屏可分为数字和模拟两种方式。数字式电容触控屏 是由每层有多条平行电极的两层电极组成，两层电极相互正交，当人的手 指接触触控屏时，手指与触控屏上的某些电极形成耦合电容，并从耦合电 容流出的漏电流,通过检测到两层电极上相互正交的与手指形成耦合电容 的两条电极而确定触控位置。此种方法只适合用于较粗的定位，并且置于 显示器前面会使显示不均勻，在要求细致定位时，要制做双层非常细密的 电极， 成本太高。  Current capacitive touch screens can be divided into digital and analog modes. The digital capacitive touch screen is composed of two layers of electrodes each having a plurality of parallel electrodes. The two layers of electrodes are orthogonal to each other. When a human finger touches the touch screen, the fingers form a coupling with some electrodes on the touch screen. The capacitance, and the leakage current flowing from the coupling capacitor, determine the touch position by detecting two electrodes on the two electrodes that are orthogonal to each other and form a coupling capacitance with the finger. This method is only suitable for coarse positioning, and it is unevenly displayed when placed in front of the display. When careful positioning is required, it is necessary to make a double-layered very fine electrode, which is too expensive.
一种模拟式电容触控屏是由整面的单层电极组成，从单层电极的四个 角向电极输入电流，当人的手指接触触控屏时，手指与电极形成耦合电容， 并从耦合电容流出的漏电流， 通过检测四个角分别流向电极电流的大小，· 计算出从手指流出电流的触控位置。此种方法可以细致定位，但控制电路 的计算量大， 在环境温度、湿度改变时， 环境电场发生改变时， 会引起漂 移， 造成定位不准确。  An analog capacitive touch screen is composed of a single-layer electrode on the whole surface, and input current from four corner electrodes of a single-layer electrode. When a human finger touches the touch screen, a finger and an electrode form a coupling capacitance, and The leakage current flowing out of the coupling capacitor detects the magnitude of the current flowing to the electrode by detecting the four corners, and calculates the touch position of the current flowing from the finger. This method can be meticulously positioned, but the calculation amount of the control circuit is large. When the ambient electric field changes when the ambient temperature and humidity change, it will cause drift, resulting in inaccurate positioning.
. 另一种模拟式电容触控屏是由每层有多条平行电极的两层电极组成， 两层电极相互正交，当人的手指接触触控屏时，手指与触控屏上的某些电 极形成耦合电容，并从耦合电容流出的漏电流，通过检测各电极流出电流 的大小，分别在两层相互正交电极上计算出橫向或纵向的触控位置。此种 方法可以细致定位，对漂移问题也有改善，但又变为双层电极，增加了触 控屏的厚度和制做难度， 并且置于显示器前面也会使显示不均勻。 目前的电磁式触控屏也可分为数字和模拟两种方式。模拟式电磁触控 屏是由两层电极组成，每层有多条环状或其他形状天线电极，两层电极的 长方向相互正交，当具有信号发射功能的触控笔接触触控屏时，相互正交 的天线电极接收到触控笔发射的电磁信号， 通过计算获得触控笔的位置。 此种方法可以细致定位，但控制电路的计算量大，成本高， 并且在边缘处 定位不准确。 Another analog capacitive touch screen is composed of two layers of electrodes each having a plurality of parallel electrodes. The two layers of electrodes are orthogonal to each other. When a person's finger touches the touch screen, the finger and the touch screen are The electrodes form a coupling capacitor, and the leakage current flowing from the coupling capacitor detects the lateral or vertical touch position on the two mutually orthogonal electrodes by detecting the magnitude of the current flowing out of each electrode. This method can be finely positioned, and the drift problem is also improved, but it becomes a double-layer electrode, which increases the thickness and manufacturing difficulty of the touch screen, and is placed in front of the display to make the display uneven. The current electromagnetic touch screen can also be divided into digital and analog modes. The analog electromagnetic touch screen is composed of two layers of electrodes, each layer has a plurality of annular or other shaped antenna electrodes, and the long sides of the two layers of electrodes are orthogonal to each other when the stylus with signal emission function contacts the touch screen. The mutually orthogonal antenna electrodes receive the electromagnetic signals emitted by the stylus and obtain the position of the stylus by calculation. This method can be finely positioned, but the control circuit is computationally intensive, costly, and inaccurate in positioning at the edges.
数字式电磁触控屏也是由两层电极组成， 每层有多条直线状天线电 极，两层电极相互正交， 当具有信号发射功能的触控笔接触触控屏时，相 互正交的部分天线电极接收到触控笔发射的电磁信号，通过各层接收电磁 信号的最大天线电极，分别得出橫向或纵向的触控位置。此种方法需要制 做双层非常细密的电极， 成本太高。  The digital electromagnetic touch screen is also composed of two layers of electrodes, each layer has a plurality of linear antenna electrodes, and the two layers of electrodes are orthogonal to each other. When the stylus with signal emission function contacts the touch screen, the mutually orthogonal portions The antenna electrode receives the electromagnetic signal emitted by the stylus, and the maximum antenna electrode that receives the electromagnetic signal through each layer respectively obtains a horizontal or vertical touch position. This method requires the preparation of a double-layered, very fine electrode, which is too costly.
带有触控屏的平板显示器是将分体的触控屏与显示屏层叠在一起,通 过显示屏探测到触摸点的平面位置， 再使显示屏上的光标跟随触摸点定 位。触控屏与显示屏的层叠使得触控式平板显示器变厚变重成本增加；在 触控屏置于显示屏前面时，触控屏感测电极产生的反射又会使得显示不均 勻和在强外界光环境下显示对比度的下降，影响显示效果。将触控板和显 示屏集成为一体，使具有触控功能的平板显示器变得更加轻薄，是人们努 力的方向。  A flat panel display with a touch screen stacks the split touch screen with the display screen, detects the planar position of the touch point through the display, and positions the cursor on the display screen following the touch point. The cascading of the touch screen and the display screen makes the touch panel display thicker and heavier and the cost increases; when the touch screen is placed in front of the display screen, the reflection generated by the touch screen sensing electrode makes the display uneven and strong. The contrast is reduced in the external light environment, which affects the display effect. Integrating the touchpad and the display to make the flat panel display with touch function lighter and thinner is the direction of people's efforts.
显示屏和触控板的集成方式主要为层叠式和镶嵌式两种，层叠式是将 触控板置于显示屏的顶面之前或底面之后，显示屏和触控板分别独立承担 显示和触控任务， 中国专利（CN20010141451 , MINXIANG INDUSTRY CO LTD, 2001) 、 芬兰专利（FI19960002692, NOKIA MOBILE PHONES LTD, 1996)、 日本专利（JP19850161986, CANON KK, 1985)、 (JP19900095167, NIPPON TELEGRAPH & TELEPHONE, 1990) 、 (JP19930306286, PFU LTD, 1993)， (JP19980014850 , NISSHA PRINTING, 1998)、 (JP19990142260 , MIMA I DENSHI BUHIN KK, 1999)、 韩国专利（KR20000084115, YU HWAN SE0NG; LIM J00-S00, 2000)、 (KR20020083301 , BANG Y0NG IK; etc. , 2002)、 台湾专利（TW556141 , AU OPTRONICS CORP, 2002)、 美国专利（US6215476, APPLE COMPUTER, 2001)、 (US20030347603 , TOPPOLY OPTOELECTRONICS CORP, 2003) 等多项专利， 都提出了电阻式、 电容式、 电磁式的触控板和 显示屏的各种层叠方案，但触控板置于显示屏顶面之前，会影响显示的亮 度、对比度、清晰度、颜色等显示效果； 电磁式触控板置于显示屏底面之 后，使触控板电极与显示屏电极的对位困难，也会影响显示的亮度； 并且 层叠的方法还会增加显示器的整体厚度；结构的复杂，又会导致可靠性下 降， 并由生产过程的复杂和装配的复杂也至使成本偏高。 The integration of the display screen and the touchpad is mainly cascading and inlaid. The cascading is placed before or after the top surface of the display screen, and the display screen and the touch panel are independently displayed and touched. Control tasks, Chinese patent (CN20010141451, MINXIANG INDUSTRY CO LTD, 2001), Finnish patent (FI19960002692, NOKIA MOBILE PHONES LTD, 1996), Japanese patent (JP19850161986, CANON KK, 1985), (JP19900095167, NIPPON TELEGRAPH & TELEPHONE, 1990) , (JP19930306286, PFU LTD, 1993), (JP19980014850, NISSHA PRINTING, 1998), (JP19990142260, MIMA I DENSHI BUHIN KK, 1999), Korean Patent (KR20000084115, YU HWAN SE0NG; LIM J00-S00, 2000), (KR20020083301 , BANG Y0NG IK; etc. , 2002), Taiwan patents (TW556141, AU OPTRONICS CORP, 2002), US patents (US6215476, APPLE COMPUTER, 2001), (US20030347603, TOPPOLY OPTOELECTRONICS CORP, 2003) and other patents, all proposed resistive, capacitive, electromagnetic touch Various stacking schemes of the control panel and the display screen, but before the touch panel is placed on the top surface of the display screen, it will affect the display brightness, contrast, sharpness, color, etc.; the electromagnetic touch panel is placed on the bottom surface of the display screen. The alignment of the touchpad electrode and the display electrode is difficult, and the brightness of the display is also affected; and the method of lamination increases the overall thickness of the display; the complexity of the structure leads to a decrease in reliability, and is caused by the production process. The complexity of assembly and assembly is also costly.
镶嵌式是将触控传感器嵌入显示屏内，在每一显示象素旁安置一个传 感器 (多为光学传感器），用双重电极连接显示象素和传感器，分别传输显 示驱动信号和触控探测信号，韩国专利（KR20030019631， JUNG Y0NG CHAE; YANG DONG YU, 2003)、 ( R20030077574, CHOI J00N-H00; J00 IN- S00， 2003)、德国专利（GB0304587. 9, SHARP, 2003)、美国专利（US19970955388, SONY ELECTRONICS INC， 1997) ， (US19980135959， I應， 1998)、 (US20030721129, EASTMAN KODAK CO, 2003)等多项专利， 也分别提出了 镶嵌式的方案，但将触控传感器镶嵌入显示屏以及双重电极的制造工艺复 杂， 电极引出线困难， 因而也至使成本高， 并且也可能产生显示驱动信号 和触控探测信号的相互干扰。  The mosaic type embeds the touch sensor into the display screen, and a sensor (mostly an optical sensor) is disposed beside each display pixel, and the display pixel and the sensor are connected by a double electrode, and the display driving signal and the touch detection signal are respectively transmitted. Korean patent (KR20030019631, JUNG Y0NG CHAE; YANG DONG YU, 2003), (R20030077574, CHOI J00N-H00; J00 IN-S00, 2003), German patent (GB0304587. 9, SHARP, 2003), US patent (US19970955388, SONY ELECTRONICS INC, 1997), (US19980135959, I should, 1998), (US20030721129, EASTMAN KODAK CO, 2003) and other patents, also proposed a mosaic scheme, but the touch sensor is embedded in the display screen and double electrode The manufacturing process is complicated, the electrode lead-out line is difficult, and thus the cost is high, and mutual interference between the display driving signal and the touch detection signal may also occur.
也有人试图靠探测液晶显示屏的盒间电容的方法来探测触控，如台湾 专利（TW20020116058， LEE YU- TUAN, 2002) , 盒间电容的变化是靠触控压 力引起盒厚的变化产生，盒间的支承物使得要改变液晶显示屏的盒厚需要 很大力量，而且改变液晶显示屏的盒厚必定会影响显示，液晶材料的介电 各向异性又使得盒间电容随显示变化，以其专利中的充电方法排除液晶材 料介电各向异性引起的盒间电容的变化又会影响显示，所以这种探测液晶 显示屏的盒间电容来探测触控的方法是不可取的。  Some people have tried to detect the touch by detecting the capacitance of the LCD screen. For example, Taiwan patent (TW20020116058, LEE YU-TUAN, 2002), the change of capacitance between the boxes is caused by the change of the thickness of the box caused by the touch pressure. The support between the boxes makes it necessary to change the thickness of the liquid crystal display, and changing the thickness of the liquid crystal display must affect the display. The dielectric anisotropy of the liquid crystal material causes the capacitance between the boxes to change with the display. The charging method in the patent excludes the change of the capacitance between the cells caused by the dielectric anisotropy of the liquid crystal material and affects the display. Therefore, it is not preferable to detect the touch capacitance of the liquid crystal display to detect the touch.
申请号为 200510080825X和 2005100861285等中国专利提出了，通过 多位模拟开关组让平板显示器显示屏电极分时或与显示驱动电路或与触 控信号电路连通，利用显示屏行电极和列电极作为触控电极感测触控； 申 请号为 2005100861285等中国专利提出了，通过信号加载电路让平板显示 器显示屏电极同时与显示驱动电路和触控信号电路连通，利用显示屏行电 极和列电极作为触控电极感测触控；使得无需在现有结构的显示屏内额外 制做任何传感器，让平板显示器显示屏具有感知触控信号能力。但行电极 和列电极处在上下基板的不同基板上时，处于上层的电极，对处于下层的 电极的触控信号存在屏蔽，使得纵向和橫向触控感测的基准不一样，给触 控探测带来困难。 发明内容 Chinese patents such as 200510080825X and 2005100861285 are proposed to allow the display panel of the flat panel display to be time-divided or to be connected to the display driving circuit or the touch panel through a plurality of analog switch groups. The control signal circuit is connected, and the display row electrode and the column electrode are used as the touch electrode to sense the touch; the Chinese patent No. 2005100861285 and the like are proposed, and the display panel electrode of the flat panel display is simultaneously displayed with the display driving circuit and the touch through the signal loading circuit. The signal circuit is connected, and the display row electrode and the column electrode are used as the touch electrode to sense the touch; so that no additional sensor is needed in the display screen of the existing structure, so that the flat panel display screen has the capability of sensing the touch signal. However, when the row electrodes and the column electrodes are on different substrates of the upper and lower substrates, the electrodes in the upper layer shield the touch signals of the electrodes in the lower layer, so that the reference of the vertical and horizontal touch sensing is different, and the touch detection is performed. Bring difficulties. Summary of the invention
本发明旨在提供一种利用平板显示器显示屏的单层电极作为触控电 极，用数字式和模拟式相结合的方法感测触控定位。让平板显示屏不仅具 有显示功能， 而且具有触控功能， 一物多用。  The present invention aims to provide a single-layer electrode using a flat panel display as a touch electrode, and to sense touch positioning by a combination of digital and analog methods. The flat panel display not only has a display function, but also has a touch function, which is versatile.
本发明的技术解决方案是： 通常的点阵型平板显示屏包括显示象素、 传输显示驱动扫描信号的行电极 (扫描电极)和数据信号的列电极 (数据电 极），在如 TN-LCD和 STN- LCD等无源平板显示屏中，在显示象素的位置显 示象素和电极共用导电膜；在如 TFT- LCD等有源平板显示屏中，显示象素 输入端口连接 TFT的漏极， TFT的柵极和源极分别再与扫描电极和信号 电极连接。利用平板显示器显示屏某一方向的电极 (行电极或列电极)作为 触控电极感测触控，将这一方向电极的两端都制做引出端与触控信号电路 连接，在两个正交的方向上用不同的触控定位方式，在垂直于电极的方向 用数字式触控定位方式，通过比较不同电极感测到的触控信号的差别来确 定触控电极的位置；在平行于电极的方向用模拟式触控定位方式，通过比 较被触控电极两端触控信号的差别来确定触控点在触控电极上的位置；从 而得到触控点在触控屏平面上的位置。  The technical solution of the present invention is: A typical dot matrix flat panel display includes display pixels, row electrodes (scan electrodes) for transmitting display drive scan signals, and column electrodes (data electrodes) for data signals, such as TN-LCD and STN. - In a passive flat panel display such as an LCD, a pixel and an electrode share a conductive film at a position of a display pixel; in an active flat panel display such as a TFT-LCD, a pixel input port is connected to a drain of the TFT, and the TFT The gate and source are connected to the scan electrode and the signal electrode, respectively. The electrode (row electrode or column electrode) in a certain direction of the flat panel display screen is used as the touch electrode to sense the touch, and both ends of the electrode in the direction are connected to the touch signal circuit, and the two are positive. In the direction of intersection, different touch positioning methods are used, and the position of the touch electrode is determined by comparing the difference of the touch signals sensed by different electrodes in a direction perpendicular to the electrode by a digital touch positioning method; The direction of the electrode is determined by the analog touch positioning method, and the position of the touch point on the touch electrode is determined by comparing the difference between the touch signals at both ends of the touch electrode; thereby obtaining the position of the touch point on the touch screen plane. .
电极对触控信号的感测又可以有多种形式， 比如电容式、 电磁式、光 电式等。 电容式触控的方案是：将平板显示器显示屏某一方向的电极如行电极 的两端都制做引出端，使每一电极的一端通过模拟开关或与显示驱动电路 连通或与一条触控信号电路连通，使这一电极的另一端通过模拟开关或悬 空或与另一条触控信号电路连通。模拟开关被控制电路控制，使电极在某 时刻一端与显示驱动电路连通传输显示驱动信号， 另一端处于悬空状态; 控制电路在下一时刻，使电极两端同时分别与触控信号电路连通传输触控 信号;然后再返回到前一时刻的一端与显示驱动电路连通另一端处于悬空 的状态，这样反复切换。当电极的两端分别与触控信号电路连通时，用电 极作为触控电极感测触控，在垂直于电极方向用数字方式来定位，人手指 接触显示屏时，手指与显示屏上的某些电极形成耦合电容，并从耦合电容 流出的漏电流，通过检测与手指形成耦合电容的电极而确定触控位置；在 平行于电极方向用模拟方式来定位，分别从与触控信号电路连通的显示屏 电极的两端向电极输入电流，当人的手指接触显示屏时，手指与电极形成 耦合电容，并从耦合电容流出的漏电流，通过检测并比较电极两端分别流 向电极的电信号，计算出从手指流出电流的触控位置，并以此定位触控位 置；通过两个正交方向的触控位置来确定触控定位点。从电极两端采样用 于检测并比较的电信号，可以是电流信号，也可以是电压信号； 可以是幅 值信号， 可以是脉宽信号， 可以是频率信号， 也可以是相位信号。 The sensing of the touch signal by the electrode can be in various forms, such as a capacitive type, an electromagnetic type, a photoelectric type, and the like. The capacitive touch solution is to make the electrodes of one direction of the flat panel display display such as the row electrodes as the lead ends, so that one end of each electrode passes through the analog switch or communicates with the display driving circuit or with a touch. The signal circuit is connected such that the other end of the electrode is passed through an analog switch or suspended or in communication with another touch signal circuit. The analog switch is controlled by the control circuit, so that the electrode communicates with the display driving circuit at one end to transmit the display driving signal, and the other end is in a floating state; at the next moment, the control circuit connects the two ends of the electrode to the touch signal circuit at the same time to transmit the touch. The signal is then returned to the state where the previous moment is connected to the display driving circuit and the other end is in a floating state, so that the switching is repeated. When the two ends of the electrode are respectively connected to the touch signal circuit, the electrode is used as the touch electrode to sense the touch, and is positioned in a digital manner perpendicular to the direction of the electrode. When the finger touches the display screen, the finger and the display are The electrodes form a coupling capacitor, and the leakage current flowing from the coupling capacitor determines the touch position by detecting the electrode forming the coupling capacitance with the finger; the analog position is parallel to the electrode direction, and is respectively connected from the touch signal circuit. The two ends of the display electrode input current to the electrode. When the human finger touches the display screen, the finger forms a coupling capacitance with the electrode, and the leakage current flowing from the coupling capacitor detects and compares the electrical signals flowing to the electrodes at both ends of the electrode. The touch position from which the current flows from the finger is calculated, and the touch position is located thereby; the touch position is determined by the touch positions in two orthogonal directions. The electrical signal for detecting and comparing from the two ends of the electrode may be a current signal or a voltage signal; it may be an amplitude signal, which may be a pulse width signal, and may be a frequency signal or a phase signal.
电磁式触控的方案是：将平板显示器显示屏某一方向的电极如行电极 的两端都制做引出端，使每一电极的一端通过模拟开关或与显示驱动电路 连通或与一条触控信号电路连通,使这一电极的另一端通过模拟开关或悬 空或与另一条触控信号电路连通。模拟开关被控制电路控制，使电极在某 时刻一端与显示驱动电路连通传输显示驱动信号， 另一端处于悬空状态， 使电极在下一时刻两端同时分别与触控信号电路连通传输触控信号，然后 再返回到前一时刻的一端与显示驱动电路连通另一端处于悬空的状态，这 样反复切换。当电极的两端分别与触控信号电路连通时，用电极作为触控 天线电极感测触控，在垂直于电极方向用数字方式来定位，当具有信号发 射功能的触控笔接触触控屏时， 天线电极接收到触控笔发射的电磁信号， 通过检测接收到触控电磁信号的电极而确定触控电极；在平行于电极方向 用模拟方式来定位， 从平行电极组每条电极的两端分别采样触控电磁信 号，通过比较被触控电极两端触控信号的差别来确定触控点在触控电极上 的位置； 通过两个正交方向的触控位置得到触控点在触控屏平面上的位 置。从电极两端采样并用于比较的触控电磁信号， 可以是幅值信号， 可以 是脉宽信号， 可以是频率信号， 也可以是相位信号。 The electromagnetic touch scheme is to make the electrodes of a certain direction of the flat panel display screen, such as the row electrodes, as the lead ends, so that one end of each electrode passes through the analog switch or communicates with the display driving circuit or with a touch. The signal circuit is connected such that the other end of the electrode is passed through an analog switch or suspended or in communication with another touch signal circuit. The analog switch is controlled by the control circuit, so that the electrode communicates with the display driving circuit at one end to transmit the display driving signal, and the other end is in a floating state, so that the electrodes are respectively connected with the touch signal circuit to transmit the touch signal at the two ends at the next moment, and then Then, one end of the previous time is connected to the display driving circuit and the other end is in a floating state, so that the switching is repeated. When the two ends of the electrode are respectively connected to the touch signal circuit, the electrode is used as the touch antenna electrode to sense the touch, and is vertically positioned in the direction perpendicular to the electrode to be positioned. When the stylus of the shooting function touches the touch screen, the antenna electrode receives the electromagnetic signal emitted by the stylus, determines the touch electrode by detecting the electrode that receives the touch electromagnetic signal, and uses the analog method to locate in parallel with the electrode direction. The touch electromagnetic signals are respectively sampled from the two ends of each electrode of the parallel electrode group, and the position of the touch point on the touch electrode is determined by comparing the difference between the touch signals at both ends of the touch electrode; The touch position is obtained by the position of the touch point on the touch screen plane. The touch electromagnetic signal sampled from both ends of the electrode and used for comparison may be an amplitude signal, may be a pulse width signal, may be a frequency signal, or may be a phase signal.
为了感测显示屏电极与触控物之间耦合的微弱信号，触控信号电路内 可设置读出放大器；为了读出信号的处理，触控信号电路内可设置模数转 换器。  In order to sense the weak signal coupled between the display electrode and the touch object, a sense amplifier can be disposed in the touch signal circuit; in order to process the read signal, an analog-to-digital converter can be disposed in the touch signal circuit.
当多条电极检测到触控信号时， 以信号最大的电极为触控定位点， 或以这些检测到触控信号的触控电极的中间位置为触控定位点。  When a plurality of electrodes detect the touch signal, the electrode with the largest signal is used as the touch positioning point, or the middle position of the touch electrode for detecting the touch signal is the touch positioning point.
使显示电极的一端或与显示驱动电路连通或与一条触控信号电路连 通的模拟开关，可以是单刀双掷模拟开关，开关的一端固定连接于显示电 极，另两端连接显示驱动电路和连接触控信号电路，控制电路让开关使显 示电极在连通显示驱动电路或连通触控信号电路之间切换;使显示电极的 一端或与显示驱动电路连通或与一条触控信号电路连通的模拟幵关，也可 以是两个单刀单掷模拟开关，显示电极通过一个单刀单掷模拟开关与显示 驱动电路连接，通过另一个单刀单掷模拟开关与触控信号电路连接，控制 电路让连接同一显示电极的两个单刀单掷模拟开关不同时连通。  The analog switch that connects one end of the display electrode or the display driving circuit or communicates with a touch signal circuit may be a single-pole double-throw analog switch, one end of the switch is fixedly connected to the display electrode, and the other ends are connected to the display driving circuit and the connection touch The control signal circuit allows the switch to switch the display electrode between the display display driving circuit or the connected touch signal circuit; the analog switch that connects one end of the display electrode to the display driving circuit or communicates with a touch signal circuit, It can also be two single-pole single-throw analog switches. The display electrode is connected to the display drive circuit through a single-pole single-throw analog switch, and is connected to the touch signal circuit through another single-pole single-throw analog switch. The control circuit allows two of the same display electrodes to be connected. A single-pole single-throw analog switch is not connected at the same time.
使显示屏各电极的一端或与显示驱动电路连通或与一条触控信号电 路连通的模拟开关组的各开关，以及使各电极的另一端或悬空或与另一条 触控信号电路连通的模拟开关组中的各开关，可以是被扫描方式控制逐一 进行切换动作， 也可以是被同时方式控制同时进行切换动作。  Each of the switches of the analog switch group that connects one end of each of the electrodes of the display screen to the display drive circuit or to a touch signal circuit, and an analog switch that causes the other end of each electrode to be either suspended or connected to another touch signal circuit Each switch in the group may be switched by the scanning mode control one by one, or may be controlled by the simultaneous mode.
模拟开关组在显示驱动电路与触控信号电路之间的切换，可以是在显 示屏部分电极连通显示驱动电路时，另一部分电极连通触控信号电路， 即 显示屏电极从连通显示驱动电路切换到连通触控信号电路是在显示驱动 的帧内进行的；为了防止显示驱动信号对触控信号产生干扰，模拟开关组 在显示驱动电路与触控信号电路之间的切换，也可以是在停止对显示屏任 何电极输出显示驱动信号时，才将显示屏电极从连通显示驱动电路转向连 通触控信号电路，即显示屏电极从连通显示驱动电路切换到连通触控信号 电路是在显示驱动的帧外进行的，也就是显示屏电极从连通显示驱动电路 切换到连通触控信号电路是在显示驱动的各帧之间进行的。在停止对显示 屏任何电极输出显示驱动信号时，为了防止对触控信号的干扰，对未从连 通显示驱动电路转向连通触控信号电路的显示屏电极，可输出一固定的电 平信号， 特别是零电平。 The switching between the display driving circuit and the touch signal circuit may be when the display part electrode is connected to the display driving circuit, and another part of the electrode is connected to the touch signal circuit, that is, the display electrode is switched from the connected display driving circuit to Connected touch signal circuit is in display driver In order to prevent the display driving signal from interfering with the touch signal, the switching of the analog switch group between the display driving circuit and the touch signal circuit may also be when the display driving signal is stopped at any electrode of the display screen. The display electrode is switched from the connected display driving circuit to the touch signal circuit, that is, the display electrode is switched from the connected display driving circuit to the connected touch signal circuit, which is performed outside the frame of the display driving, that is, the display electrode is Switching the connected display drive circuit to the connected touch signal circuit is performed between frames of the display drive. In order to prevent the display signal from being outputted to any of the electrodes of the display screen, in order to prevent interference with the touch signal, a fixed level signal may be output to the display electrode that is not turned from the connected display driving circuit to the touch signal circuit, in particular It is zero level.
平板显示器可以是 TN型 STN型或 TFT型液晶显示器、 0LED显示器、 PDP显示器、 也可以是其他平板显示器。  The flat panel display may be a TN type STN type or TFT type liquid crystal display, a 0 LED display, a PDP display, or another flat panel display.
既用于传输显示信号又用于感测和传输触控的显示屏电极，可以是显 示屏的行电极， 也可以是显示屏的列电极。  The display electrode used to transmit the display signal and to sense and transmit the touch may be the row electrode of the display screen or the column electrode of the display screen.
这种以显示屏的显示驱动电极也作为触控信号感测电极，并且以数模 结合的触控信号感测方法，使得无需在通常无触控功能的显示屏的制做过 程中，增加任何新的工艺过程、材料和元素， 即可成为有感知触控信号能 力的显示屏。 附图简要说明  The display driving electrode of the display screen also functions as a touch signal sensing electrode, and the digital signal combined touch signal sensing method eliminates the need to add any process during the manufacturing process of the display without the touch function. New processes, materials and elements make it a display with the ability to sense touch signals. BRIEF DESCRIPTION OF THE DRAWINGS
图 1 是以行电极为触控电极的数模电容触控式液晶显示屏的电气连 接示意图。  Figure 1 is a schematic diagram of the electrical connection of a digital-to-analog capacitive touch-screen LCD with a row electrode as a touch electrode.
图 2 是一种以行电极为触控电极的数模电磁触控式无源液晶显示屏 的电气连接示意图。  FIG. 2 is a schematic diagram of electrical connection of a digital-analog electromagnetic touch passive liquid crystal display with a row electrode as a touch electrode.
图 3 是一种以列电极为触控电极的数模电磁触控式有源液晶显示屏 的电气连接示意图。 具体实施方式 本发明的实施例之一如图 1所示：一种在显示驱动的帧内进行的，以 行电极为触控电极的数模电容触控式液晶显示器 100。液晶显示器 100以 显示屏上基板玻璃 110、显示屏下基板玻璃 120、行电极 111、列电极 121、 行显示驱动电路 130、 列显示驱动电路 140、 触控信号电路 150、 单刀双 掷模拟开关组 160和单刀单掷模拟开关组 170、控制电路 180等组成。行 电极 111特别被制做成从两边均有引出端，并分别连接到单刀双掷模拟开 关组 160和单刀单掷模拟开关组 170。通常状态是单刀双掷模拟开关组 160 使行电极 111一端与显示驱动电路 130连通传输显示驱动信号，单刀单掷 模拟开关组 170使行电极 111另一端处于悬空状态；控制电路 180让单刀 双掷模拟开关组 160和单刀单掷模拟开关组 170以描扫的方式，逐一使行 电极 111各电极的两端同时分别与触控信号电路 150连通传输触控信号， 然后再返回到通常的一端与显示驱动电路 130连通另一端处于悬空的状 态， 这样反复切换。 在行电极 111 各电极两端同时分别与触控信号电路 150连通的时刻，触控信号电路 150从行电极 111各电极的两端向电极输 出电流，人的手指 190接触触控屏时，手指 190与行电极 111形成耦合电 容，并从耦合电容流出的漏电流，触控信号电路 150以流出的漏电流超过 某一阈值的电极来检验是否被触控，当超过阈值的电极数为奇数时以中间 电极为触控电极，当超过阈值的电极数为偶数时以中间两条电极中的一条 为触控电极， 以数字式的方法确定一个方向的触控定位位置；再比较触控 电极两端分别流向电极电流的大小，以模拟式的方法计算出手指 190在另 一个方向的触控定位位置；通过两个正交方向的触控位置来确定触控定位 点，使液晶显示器 100既用于显示又用于触控，而不再需要独立之触控屏。 FIG. 3 is a schematic diagram of electrical connection of a digital-analog electromagnetic touch active liquid crystal display with a column electrode as a touch electrode. detailed description One embodiment of the present invention is shown in FIG. 1 : a digital-to-analog capacitive touch liquid crystal display 100 that uses a row electrode as a touch electrode in a display-driven frame. The liquid crystal display 100 has a display substrate 110, a lower display substrate 120, a row electrode 111, a column electrode 121, a row display driving circuit 130, a column display driving circuit 140, a touch signal circuit 150, and a single-pole double-throw analog switch group. The 160 and the single-pole single-throw analog switch group 170, the control circuit 180, and the like. The row electrodes 111 are specifically formed to have terminals from both sides and are connected to the single-pole double-throw analog switch group 160 and the single-pole single-throw analog switch group 170, respectively. The normal state is that the single-pole double-throw analog switch group 160 causes one end of the row electrode 111 to communicate with the display driving circuit 130 to transmit a display driving signal, and the single-pole single-throw analog switch group 170 causes the other end of the row electrode 111 to be in a floating state; the control circuit 180 makes the single-pole double-throwing The analog switch group 160 and the single-pole single-throw analog switch group 170 respectively connect the two ends of the electrodes of the row electrode 111 to the touch signal circuit 150 to transmit the touch signals, and then return to the normal end. The display driving circuit 130 is in a state in which the other end is in a floating state, and thus the switching is repeated. At the time when the two ends of the row electrode 111 are respectively connected to the touch signal circuit 150, the touch signal circuit 150 outputs current from the two ends of each electrode of the row electrode 111 to the electrode, and when the human finger 190 touches the touch screen, the finger 190 and the row electrode 111 form a coupling capacitance, and the leakage current flowing from the coupling capacitor, the touch signal circuit 150 checks whether the touched current exceeds a certain threshold, and when the number of electrodes exceeding the threshold is an odd number The middle electrode is used as the touch electrode. When the number of electrodes exceeding the threshold is an even number, one of the middle two electrodes is used as a touch electrode, and the touch positioning position in one direction is determined by a digital method; The end of the current flows to the electrode current, and the touch positioning position of the finger 190 in the other direction is calculated by an analog method; the touch positioning point is determined by the touch positions of the two orthogonal directions, so that the liquid crystal display 100 is used The display is also used for touch, and no separate touch screen is needed.
本发明的实施例之二也如图 1所示：一种在显示驱动的各帧之间进行 的， 以行电极为触控电极的数模电容触控式液晶显示器 100。液晶显示器 100以显示屏上基板玻璃 110、显示屏下基板玻璃 120、行电极 111、列电 极 121、 行显示驱动电路 130、 列显示驱动电路 140、 触控信号电路 150、 单刀双掷模拟开关组 160和单刀单掷模拟开关组 170、控制电路 180等组 成。行电极 111特别被制做成从两边均有引出端，并分别连接到单刀双掷 模拟开关组 160和单刀单掷模拟开关组 170。通常状态是单刀双掷模拟开 关组 160使行电极 111一端与显示驱动电路 130连通传输显示驱动信号， 单刀单掷模拟开关组 170断开使行电极 111另一端处于悬空状态;控制电 路 180在显示驱动的各帧之间，让行显示驱动电路 130和列显示驱动电路 140 停止对显示屏任何电极输出显示驱动信号， 而只是输出零电位信号 时，才将单刀双掷模拟开关组 160和单刀单掷模拟开关组 170以描扫的方 式，逐一使行电极 111各电极与行显示驱动电路 130断开，并使电极的两 端同时分别与触控信号电路 150连通传输触控信号，然后再返回到通常的 行电极 111一端与行显示驱动电路 130连通另一端处于悬空的状态。在行 电极 111各电极两端同时分别与触控信号电路 150连通的时刻，触控信号 电路 150从行电极 111各电极的两端向电极输出电流，人的手指 190接触 触控屏时，手指 190与行电极 111形成耦合电容，并从耦合电容流出的漏 电流，，触控信号电路 150以流出的漏电流超过某一阈值的电极来检验是否 被触控，当超过阈值的电极数为奇数时以中间电极为触控电极，当超过阈 值的电极数为偶数时以中间两条电极中的一条为触控电极，以数字式的方 法确定一个方向的触控定位位置;再比较触控电极两端分别流向电极电流 的大小， 以模拟式的方法计算出手指 190在另一个方向的触控定位位置； 通过两个正交方向的触控位置来确定触控定位点，使液晶显示器 100既用 于显示又用于触控， 而不再需要独立之触控屏。 The second embodiment of the present invention is also shown in FIG. 1. A digital-to-analog capacitive touch liquid crystal display 100 with a row electrode as a touch electrode is performed between frames of display driving. The liquid crystal display 100 has a display substrate 110, a lower display substrate 120, a row electrode 111, a column electrode 121, a row display driving circuit 130, a column display driving circuit 140, a touch signal circuit 150, and a single-pole double-throw analog switch group. 160 and single-pole single-throw analog switch group 170, control circuit 180, etc. to make. The row electrodes 111 are specifically formed to have terminals from both sides and are connected to the single-pole double-throw analog switch group 160 and the single-pole single-throw analog switch group 170, respectively. The normal state is that the single-pole double-throw analog switch group 160 causes one end of the row electrode 111 to communicate with the display driving circuit 130 to transmit a display driving signal, and the single-pole single-throw analog switch group 170 is turned off to make the other end of the row electrode 111 in a floating state; the control circuit 180 is displaying Between the frames of the driving, the row display driving circuit 130 and the column display driving circuit 140 stop outputting the driving signal to any of the electrodes of the display screen, and only output the zero potential signal, and then the single-pole double-throwing analog switch group 160 and the single-pole single-single The throwing analog switch group 170 disconnects the electrodes of the row electrode 111 from the row display driving circuit 130 one by one, and connects the two ends of the electrode to the touch signal circuit 150 to transmit the touch signal, and then returns. One end of the normal row electrode 111 is connected to the row display driving circuit 130 and the other end is suspended. When the ends of the electrodes of the row electrode 111 are simultaneously connected to the touch signal circuit 150, the touch signal circuit 150 outputs current from the two ends of each electrode of the row electrode 111 to the electrode, and when the finger 190 of the person touches the touch screen, the finger 190 and the row electrode 111 form a coupling capacitance, and the leakage current flowing from the coupling capacitor, the touch signal circuit 150 checks whether the touched current exceeds a certain threshold, and the number of electrodes exceeding the threshold is an odd number. The middle electrode is used as the touch electrode. When the number of electrodes exceeding the threshold is an even number, one of the middle two electrodes is used as the touch electrode, and the touch positioning position in one direction is determined by a digital method; and the touch electrode is compared. The two sides respectively flow to the magnitude of the electrode current, and the touch positioning position of the finger 190 in the other direction is calculated by an analog method; the touch positioning point is determined by the touch positions of the two orthogonal directions, so that the liquid crystal display 100 is It is used for display and for touch, and no separate touch screen is required.
本发明的实施例之三如图 2所示:一种以行电极为触控电极的数模电 磁触控式无源液晶显示器 200。 液晶显示器 200 以的显示屏上基板玻璃 210、 显示屏下基板玻璃 220、 行电极 211、 列电极 221、 行显示驱动电路 230、 列显示驱动电路 240、触控信号电路 250、单刀双掷模拟开关组 260 和单刀单掷模拟开关组 270、控制电路 280等组成。行电极 211特别被制 做成从两边均有引出端，并分别连接到单刀双掷模拟幵关组 260和单刀单 掷模拟开关组 270。通常状态是单刀双掷模拟开关组 260使行电极 211— 端与行显示驱动电路 230连通传输显示驱动信号， 单刀单掷模拟开关组 270断开使行电极 211另一端处于悬空状态；控制电路 280让单刀双掷模 拟开关组 260和单刀单掷模拟开关组 270以描扫的方式， 逐一使行电极 211各电极与行显示驱动电路 230断开，并使两端同时分别与触控信号电 路 250连通传输触控信号， 然后再返回到通常的一端与行显示驱动电路 230连通另一端处于悬空的状态， 这样反复切换。在行电极 211各电极两 端同时分别与触控信号电路 250连通的时刻，触控信号电路 250检测行电 极 211各电极的两端的电磁触控信号，当具有电磁信号发射功能的触控笔 290接触触控屏时，行电极 211的部分电极接收到触控笔 290发出的电磁 触控信号，触控信号电路 250以检测到超过某一阈值的触控信号来检验是 否被触控，当超过阈值的电极数为奇数时以中间电极为触控电极，当超过 阈值的电极数为偶数时以中间两条电极中的一条为触控电极，以数字式的 方法确定一个方向的触控定位位置;再比较触控电极两端分别检测到的触 控信号的相位差，以模拟式的方法计算出触控笔 290在另一个方向的触控 定位位置；通过两个正交方向的触控位置来确定触控定位点，使液晶显示 器 200既用于显示又用于触控， 而不再需要独立之触控屏。 The third embodiment of the present invention is shown in FIG. 2 : a digital-analog electromagnetic touch passive liquid crystal display 200 with a row electrode as a touch electrode. The display panel upper substrate glass 210, the display lower substrate glass 220, the row electrode 211, the column electrode 221, the row display driving circuit 230, the column display driving circuit 240, the touch signal circuit 250, the single-pole double-throw analog switch The group 260 is composed of a single-pole single-throw analog switch group 270, a control circuit 280, and the like. The row electrodes 211 are specifically made to have terminals from both sides and are connected to the single-pole double-throw simulation switch group 260 and the single-pole single-throw analog switch group 270, respectively. The normal state is a single-pole double-throw analog switch group 260 that causes the row electrodes 211 to be The end-to-row display driving circuit 230 communicates with the display display driving signal, and the single-pole single-throw analog switch group 270 is turned off to make the other end of the row electrode 211 in a floating state; the control circuit 280 allows the single-pole double-throwing analog switch group 260 and the single-pole single-throw analog switch group. 270 in the manner of scanning, the electrodes of the row electrode 211 are disconnected from the row display driving circuit 230 one by one, and the two ends are simultaneously connected with the touch signal circuit 250 to transmit the touch signal, and then return to the normal end and row. The display driving circuit 230 is in a state in which the other end is in a floating state, and thus the switching is repeated. The touch signal circuit 250 detects the electromagnetic touch signals at both ends of the electrodes of the row electrode 211 at the time when the two ends of the row electrodes 211 are respectively connected to the touch signal circuit 250, and the stylus pen 290 having the electromagnetic signal transmitting function is detected. When the touch screen is touched, a part of the electrodes of the row electrode 211 receives the electromagnetic touch signal emitted by the stylus 290, and the touch signal circuit 250 detects the touch signal exceeding a certain threshold to check whether the touch is touched. When the number of electrodes of the threshold is an odd number, the middle electrode is used as the touch electrode, and when the number of electrodes exceeding the threshold is an even number, one of the middle two electrodes is used as the touch electrode, and the touch positioning position in one direction is determined by a digital method. Comparing the phase difference of the touch signals detected at the two ends of the touch electrode, and calculating the touch positioning position of the stylus 290 in another direction by an analog method; the touch positions through two orthogonal directions To determine the touch location point, the liquid crystal display 200 is used for both display and touch, and no separate touch screen is needed.
本发明的实施例之四如图 3所示:一种以上电极为触控电极的数模电 磁触控式有源液晶显示器 300。液晶显示器 300以显示屏上基板玻璃 310、 行电极 311、列电极 312、显示象素 313、显示屏下基板玻璃 320、行显示 驱动电路 330、 列显示驱动电路 340、 触控信号电路 350、 单刀双掷模拟 开关组 360和单刀单掷模拟开关组 370、控制电路 380等组成。列电极 312 特别被制做成从两边均有引出端，并分别连接到单刀双掷模拟幵关组 360 和单刀单掷模拟开关组 370。通常状态是单刀单刀双掷模拟开关组 360使 列电极 312—端与列显示驱动电路 340连通传输显示驱动信号，单刀单掷 模拟开关组 370断开使列电极 312另一端处于悬空状态；在某时刻，控制 电路 380让与列显示驱动电路 340连接的单刀双掷模拟幵关组 360使列电 极 312各电极一端与列显示驱动电路 340脱离，同时单刀双掷模拟开关组 360和单刀单掷模拟幵关组 370使列电极 312各电极两端同时分别与触控 信号电路 350连通传输触控信号;然后再返回到通常的一端与列显示驱动 电路 340连通另一端处于悬空的状态，这样反复切换。在列电极 312各电 极两端同时分别与触控信号电路 350连通的时刻，触控信号电路 350以描 扫的方式，逐一检测列电极 312各电极的两端的电磁触控信号，当具有电 磁信号发射功能的触控笔 390接触触控屏时，列电极 312的部分电极接收 到触控笔 390发出的电磁触控信号，触控信号电路 350以检测到超过某一 阈值的触控信号来检验是否被触控，当超过阈值的电极数为奇数时以中间 电极为触控电极，当超过阈值的电极数为偶数时以中间两条电极中的一条 为触控电极， 由数字的方法确定一个方向的触控定位位置；再比较触控电 极两端分别检测到的触控信号的相位差， 以模拟式的方法计算出触控笔 390在另一个方向的触控定位位置；通过两个正交方向的触控位置来确定 触控定位点，使液晶显示器 300既用于显示又用于触控，而不再需要独立 之触控屏。 The fourth embodiment of the present invention is shown in FIG. 3: a digital-analog electromagnetic touch active liquid crystal display 300 in which one or more electrodes are touch electrodes. The liquid crystal display 300 has a substrate glass 310, a row electrode 311, a column electrode 312, a display pixel 313, a display lower substrate glass 320, a row display driving circuit 330, a column display driving circuit 340, a touch signal circuit 350, and a single knife. The double throw analog switch group 360 and the single pole single throw analog switch group 370, the control circuit 380, and the like are composed. The column electrodes 312 are specifically made to have terminals from both sides and are connected to the single-pole double-throw simulation switch group 360 and the single-pole single-throw analog switch group 370, respectively. The normal state is that the single-pole single-pole double-throw analog switch group 360 causes the column electrode 312-end to communicate with the column display driving circuit 340 to transmit a display driving signal, and the single-pole single-throw analog switch group 370 is turned off to make the other end of the column electrode 312 in a floating state; At the same time, the control circuit 380 causes the single-pole double-throw analog switch group 360 connected to the column display driving circuit 340 to disconnect one end of each electrode of the column electrode 312 from the column display driving circuit 340, and the single-pole double-throw analog switch group The 360 and single-pole single-throw analog switch group 370 causes the electrodes of the column electrodes 312 to communicate with the touch signal circuit 350 at the same time to transmit the touch signals; and then return to the normal end and the column display driving circuit 340 is connected to the other end and is floating. The state, so repeatedly switch. At the time when the electrodes of the column electrodes 312 are respectively connected to the touch signal circuit 350 at the same time, the touch signal circuit 350 detects the electromagnetic touch signals at both ends of the electrodes of the column electrodes 312 one by one in the manner of scanning, and has an electromagnetic signal. When the stylus 390 of the transmitting function contacts the touch screen, part of the electrodes of the column electrode 312 receives the electromagnetic touch signal emitted by the stylus 390, and the touch signal circuit 350 detects the touch signal exceeding a certain threshold. Whether the touch is performed. When the number of electrodes exceeding the threshold is an odd number, the middle electrode is used as the touch electrode. When the number of electrodes exceeding the threshold is even, one of the middle two electrodes is used as the touch electrode, and a digital method is used to determine one. The position of the touch position of the touch sensor; the phase difference of the touch signals detected at the two ends of the touch electrode is compared, and the touch position of the touch pen 390 in the other direction is calculated by an analog method; The touch position in the intersecting direction determines the touch positioning point, so that the liquid crystal display 300 is used for both display and touch, and no separate touch screen is needed.
上述四个实施例并不代表所有可能的实施方案，其它的变形方案也应 是本发明的保护范围。  The above four embodiments do not represent all possible embodiments, and other modifications are also intended to be within the scope of the invention.

Claims

权利要求书 Claim
1. 数模触控式平板显示器， 点阵型平板显示器的显示屏包括显示象 素、 传输显示驱动扫描信号的行电极和数据信号的列电极， 其特征在于： 利用平板显示器显示屏某一方向的电极作为触控电极感测触控，将这一方 向电极的两端都制做引出端与触控信号电路连接，在垂直于电极的方向用 数字式触控定位方式，通过比较不同电极感测到的触控信号的差别来确定 触控电极的位置；在平行于电极的方向用模拟式触控定位方式，通过比较 被触控电极两端触控信号的差别来确定触控点在触控电极上的位置。 1. A digital-analog touch panel display, the display screen of a dot-matrix flat-panel display includes a display pixel, a row electrode for transmitting a display driving scan signal, and a column electrode of a data signal, and is characterized by: using a flat panel display screen in a certain direction The electrode is used as the touch electrode to sense the touch, and the two ends of the electrode are connected to the touch signal circuit, and the digital touch display mode is used in the direction perpendicular to the electrode, and the sensing is performed by comparing different electrodes. The difference between the touch signals is determined to determine the position of the touch electrodes; the analog touch positioning method is used in the direction parallel to the electrodes, and the touch points are determined by comparing the difference between the touch signals at both ends of the touch electrodes. The position on the electrode.
2. 根据权利要求 1所述的数模触控式平板显示器， 其中所述的用于 感测触控的某一方向的电极，其特征在于：某一方向的电极是显示屏的行 电极和列电极中的一种。 - 2. The digital-analog touch panel display according to claim 1, wherein the electrode for sensing a direction of the touch is characterized in that the electrode in a certain direction is a row electrode of the display screen and One of the column electrodes. -
3. 根据权利要求 1所述的数模触控式平板显示器， 其中所述的电极 引出端与触控信号电路的连接，其特征在于：用于探测触控的显示屏电极 是通过多位模拟开关组与显示驱动电路和触控信号电路相连接，模拟开关 使电极的一端或与显示驱动电路连通或与触控信号电路连通，使电极的另 一端或悬空或与触控信号电路连通。 . 3. The digital-analog touch panel display according to claim 1, wherein the electrode lead-out end is connected to the touch signal circuit, and the display screen electrode for detecting touch is simulated by multiple bits. The switch group is connected to the display driving circuit and the touch signal circuit. The analog switch connects one end of the electrode to the display driving circuit or communicates with the touch signal circuit, so that the other end of the electrode is suspended or connected to the touch signal circuit. .
4. 根据权利要求 3所述的使每一电极的一端或与显示驱动电路连通 或与触控信号电路连通，使这一电极的另一端或悬空或与另一条触控信号 电路连通的多位模拟开关组，其特征在于：模拟幵关组中的各幵关是以扫 描方式和是以同时方式中的至少一种方式进行开关切换动作。  4. The method of causing one end of each electrode to communicate with a display driving circuit or to communicate with a touch signal circuit according to claim 3 such that the other end of the electrode is either suspended or connected to another touch signal circuit. The analog switch group is characterized in that: each of the switches in the analog group is switched in a scanning manner and in at least one of the simultaneous manners.
5.根据权利要求 3所述的使每一电极的一端或与显示驱动电路连通 或与触控信号电路连通，使这一电极的另一端或悬空或与另一条触控信号 电路连通的多位模拟开关组，其特征在于：模拟幵关组在显示驱动电路与 触控信号电路之间的切换，是在显示驱动的帧内进行的，即显示屏部分电 极连通显示驱动电路时， 另一部分电极连通触控信号电路。 5. The method of causing one end of each electrode to communicate with a display driving circuit or to communicate with a touch signal circuit according to claim 3 such that the other end of the electrode is either suspended or connected to another touch signal circuit. The analog switch group is characterized in that: the switching between the display driving circuit and the touch signal circuit of the analog switch group is performed in the frame of the display driving, that is, when the display part electrode is connected to the display driving circuit, another part of the electrode Connect the touch signal circuit.
6. 根据权利要求 3所述的使每一电极的一端或与显示驱动电路连通 或与触控信号电路连通,使这一电极的另一端或悬空或与另一条触控信号 电路连通的多位模拟开关组，其特征在于：模拟开关组在显示驱动电路与 触控信号电路之间的切换，是在显示驱动的各帧之间进行的，即停止对显 示屏任何电极输出显示驱动信号时，才将显示屏电极从连通显示驱动电路 转向连通触控信号电路。 6. The method of claim 3, wherein one end of each electrode is in communication with a display driving circuit or in communication with a touch signal circuit, such that the other end of the electrode is either suspended or connected to another touch signal circuit. The analog switch group is characterized in that: the switching between the display driving circuit and the touch signal circuit is performed between the frames of the display driving, that is, when the display driving signal is stopped for any electrode of the display screen, The display electrode is turned from the connected display driving circuit to the touch signal circuit.
7. 根据权利要求 1所述的数模触控式平板显示器， 其中所述的电极 感测触控信号，其特征在于：感测触控信号的方式是电容式和电磁式中的 一种。  The digital-analog touch panel display according to claim 1, wherein the electrode senses the touch signal, and the method of sensing the touch signal is one of a capacitive type and an electromagnetic type.
8. 根据权利要求 1所述的数模触控式平板显示器， 其中所述的电极 感测触控信号， 其特征在于： 感测的触控信号是流量信号、幅值信号、脉 宽信号、 频率信号和相位信号中的至少一种。  The digital-analog touch panel display according to claim 1 , wherein the sensing signal is a touch signal, wherein the sensed touch signal is a flow signal, a magnitude signal, a pulse width signal, At least one of a frequency signal and a phase signal.
9. 根据权利要求 1所述的数模触控式平板显示器， 其中所述的触控 信号电路， 其特征在于： 触控信号电路内设置有读出放大器。  9. The digital-to-analog touch panel display according to claim 1, wherein the touch signal circuit is characterized in that: a sense amplifier is disposed in the touch signal circuit.
10.根据权利要求 1所述的数模触控式平板显示器，其中所述的触控 信号电路， 其特征在于： 触控信号电路内设置有模数转换器。  The digital-sensing touch panel display according to claim 1, wherein the touch signal circuit is characterized in that: an analog-to-digital converter is disposed in the touch signal circuit.
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