WO2011156953A1 - Méthode de traitement de signal pour un écran à commande tactile - Google Patents

Méthode de traitement de signal pour un écran à commande tactile Download PDF

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Publication number
WO2011156953A1
WO2011156953A1 PCT/CN2010/073972 CN2010073972W WO2011156953A1 WO 2011156953 A1 WO2011156953 A1 WO 2011156953A1 CN 2010073972 W CN2010073972 W CN 2010073972W WO 2011156953 A1 WO2011156953 A1 WO 2011156953A1
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WO
WIPO (PCT)
Prior art keywords
touch
signal
electrode line
electrode
point
Prior art date
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PCT/CN2010/073972
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English (en)
Chinese (zh)
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
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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 PCT/CN2010/073972 priority Critical patent/WO2011156953A1/fr
Priority to CN2010800017002A priority patent/CN102439545A/zh
Publication of WO2011156953A1 publication Critical patent/WO2011156953A1/fr

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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
    • G06F3/044—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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04186—Touch location disambiguation
    • 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
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger

Definitions

  • the present invention relates to a signal processing scheme for a touch screen, and more particularly to a signal processing scheme for a capacitive touch screen and a touch panel display. Background technique
  • Touch is the most important way of human perception, the most natural way for people to interact with machines. Touch screen development has been widely used in many fields such as personal computers, smart phones, public information, smart home appliances, industrial control and so on. In the current touch field, there are mainly resistive touch screens, photoelectric touch screens, ultrasonic touch screens, and flat capacitive touch screens. In recent years, projected capacitive touch screens have developed rapidly.
  • Resistive touch screen is still the leading product on the market, but the structure of the two-layer substrate of the resistive touch screen makes the reflection of the touch screen greatly affect the brightness of the display when the touch screen and the display panel are stacked together. Display quality such as contrast, color saturation, etc., greatly degrades the overall display quality, and increases the brightness of the backlight of the display panel, which also causes the power consumption to rise; the analog resistive touch screen also has the problem of positioning drift, from time to time. Position calibration; In addition, the working mode of the resistive touch screen electrode makes the life of the touch screen shorter.
  • Infrared touch screens and ultrasonic touch screens do not affect display quality.
  • the infrared touch screen and the ultrasonic touch screen are costly, and water droplets and dust can affect the reliability of the touch screen operation, especially the infrared touch screen and the ultrasonic touch screen mechanism are complicated, and the power consumption is large, so that the infrared Touch screens and ultrasonic touch screens are basically not available on portable products.
  • the structure of the single-layer substrate of the flat capacitive touch screen makes the touch screen have little effect on the display quality when the touch screen and the display panel are stacked together.
  • the planar capacitive touch screen also has the problem of positioning drift. Position calibration is performed from time to time. Water droplets also affect the reliability of the touch screen operation; especially the planar capacitive touch screen consumes a lot of power and costs, and also makes the plane Capacitive touch screens are basically not available on portable products.
  • the projected capacitive touch screen has little effect on display quality and high sensitivity.
  • the projected capacitive touch screen has high requirements on the resistance value of the detecting electrode line, so that the detecting electrode line of the projected capacitive touch screen used in combination with the display panel cannot be transparent only with low conductivity such as ITO.
  • the electrode layer also has a high conductivity electrode layer such as a metal, which has a complicated manufacturing process and high cost, and is particularly expensive in terms of a large-sized or even a large-sized touch screen.
  • the projected capacitive touch screen is not a true digital touch screen. The positioning point needs to undergo complicated calculation. The distributed capacitance in the manufacturing and use environment will affect the reliability of the touch screen operation.
  • the display drive signal And the interference of other electrical signals will affect the work of the touch screen; in the case of multi-touch screens, in order to eliminate the non-realistic touch positioning points commonly known as "ghost points", the "contact” of real touch positioning is obtained, and the simulation is performed.
  • the calculus workload is even larger, and the requirements for driving chip computing speed and processing data are higher, and the power consumption of the system is also increased.
  • the sensitivity of the touch screen is high enough, and the sensitivity is high, which is easy to cause an accidental touch, and the touch action cannot be different depending on the touch intensity of the operator's finger.
  • the invention is a solution for a touch signal and a data processing proposed in order to realize a multifunctional and easy-to-operate digital capacitive touch screen.
  • the touch signal refers to an analog signal before digital-to-analog conversion, or The digital-to-analog converted digital signal
  • the processing refers to a method, condition, and result of determining based on the measured analog signal or digital signal.
  • the invention compares the time sequence of the touch signals generated by different touch electrodes on the line without comparing the complex simulation, or compares the size of the touch signals on different touch electrodes, or simulates a single touch electrode.
  • the size of the online touch signal to distinguish the "contact” and "ghost point” in multi-touch; and to distinguish the "touch” and “touch” in the touch with a double threshold scheme to achieve Different operations.
  • a signal processing scheme of a touch screen having a substrate and a touch circuit, wherein the substrate is provided with not less than two sets of electrode groups each having m row electrode lines and n column electrode lines, wherein m and n are natural numbers greater than 2; the electrode lines of the two rows intersect with each other, and the electrode lines in the same group do not intersect each other; the leading ends of the electrode lines in the group may be set in the same direction or may be set In different directions, the lead ends may be disposed in two different directions of the electrode lines; the electrode line lead ends refer to the end points of the electrode lines extending from the touch area to the touch area and at the boundary of the touch area.
  • the touch circuit has a touch excitation source and a touch signal detection circuit; each electrode line of the row electrode group and the column electrode group is connected to the touch circuit, and the touch excitation source pairs the two groups of electrodes during the working period of the touch circuit A touch excitation signal is simultaneously applied to more than two electrode lines in the same group, and the touch signal detection circuit detects the touch signals on each electrode line simultaneously or in time to detect whether each electrode line is touched.
  • the touch circuit compares the time of the touch signals on the row or column electrode lines where the plurality of possible touch positioning points are located.
  • a feature or amplitude feature to determine a real touch location point among a plurality of possible touch location points; the touch location point is a touch object touch or When the touch screen is touched, a representative position coordinate point in the touch screen touch range; the possible touch positioning point means that the touch signals on the row and column electrode lines satisfy the touch positioning condition
  • the touch-pointing point is the touch-pointing point of the plurality of possible touch-pointing points that have a real touch object.
  • the touch screen is a digital capacitive touch screen or a display type touch screen.
  • the time feature of the touch signal on the row or column touch electrode line where the plurality of possible touch positioning points are located is compared to determine the real touch in the possible touch positioning point.
  • the positioning point is to determine the real touch positioning point among the plurality of possible touch positioning points by comparing the time sequence generated by the touch signals on the row or column touch electrode lines of the plurality of possible touch positioning points, and to determine the real touch positioning points among the plurality of possible touch positioning points.
  • the touch on the touch location point performs a functional operation.
  • the time sequence generated by comparing the touch signals on the row or column touch electrode lines where the plurality of possible touch positioning points are located is used to determine the plurality of possible touch positioning points.
  • the real touch positioning point is the intersection of the row electrode line of the newly added touch positioning point and the column electrode line of the newly added touch positioning point, and the new real touch positioning point is added;
  • the intersection of the row electrode line of the touch positioning point and the column electrode line of the newly added touch positioning point may be a new real touch positioning point; or the row electrode line of the newly added touch positioning point and The intersection of the column electrode lines that have the possible touch positioning points is a new real touch positioning point.
  • the plurality of possible touch positioning points are determined by comparing amplitude characteristics of touch signals on the row or column touch electrode lines where the plurality of possible touch positioning points are located.
  • the real touch positioning point is to compare the size of the touch signal on the touch electrode line of different rows or different columns, or by comparing the size of the touch signal on different lead ends of the same row or the same column electrode line, or by fitting
  • the size of the touch signal on the touch electrode line determines the actual touch positioning point among the plurality of possible touch positioning points, and performs functional operation on the touch on the real touch positioning point.
  • the comparing the size of the touch signal on the touch electrode line of different rows or different columns to determine the real touch positioning point among the plurality of possible touch positioning points refers to mutual Judging the position of the real touch point on the touch electrode line by comparing the size of the touch signal on different touch electrodes on the same set of electrode lines on the same set of electrode lines; Touch of a touch electrode line with a large control signal The touch point of the touch electrode line that is smaller than the touch signal is closer to the lead end of the touch electrode line.
  • the comparing the size of the touch signal on the touch electrode line of different rows or different columns to determine the real touch positioning point among the plurality of possible touch positioning points refers to mutual Comparing the size of the touch signals of the different touch terminals on the adjacent touch electrodes on the same set of electrode lines on the same set of electrode lines to determine the true touch point at the touch electrode The position of the line; the touch point is closer to the leading end of the touch electrode line with a larger touch signal.
  • the comparing the size of the touch signal on the same row or the same column of the touch electrode line to determine the real touch positioning point among the plurality of possible touch positioning points refers to
  • the touch electrodes are connected to the touch electrodes, and the touch signals on different touch terminals on the touch electrode line are compared to determine the position of the real touch points on the touch electrode lines; the touch points are closer to the touch electrode lines. The larger end of the touch signal.
  • determining the actual touch positioning point among the plurality of possible touch positioning points by fitting the size of the touch signal on one touch electrode line means that the touch signal exceeds The intersection of the touch threshold electrode line and the touch electrode line is a possible touch positioning point, and the touch signal line touch signal is matched by different combinations of all possible touch positioning points, and then The size of the touch signal actually measured by the touch electrode line is compared to determine one or more real touch positioning points on the touch electrode line.
  • the performing a functional operation on the touch on the real touch positioning point includes: responding to the touch and movement of a real touch positioning point within a preset time range, The response is an action that performs a "select” or “drag” or “write” function.
  • the performing a functional operation on the touch on the real touch positioning point includes a response to a relative movement of the plurality of real touch positioning points within a preset time range, the response Is the operation of performing a "select” or “drag” or “write” or “zoom in” or “zoom out” or “rotate” function.
  • the touch screen sets two signal thresholds for each touch electrode line, and the first signal threshold is smaller than the second signal threshold; when the touch signal on the touch electrode line exceeds the first signal threshold When the threshold is smaller than the second signal threshold, the touch screen uses the touch electrode line whose touch signal exceeds the first signal threshold and is smaller than the second signal threshold as the touched electrode line, and the touched electrode line and the column touched electrode line are The intersection is positioned as a touch point; when the touch signal on the touched touch electrode line exceeds the second signal threshold, the touch screen uses the touch electrode line whose touch signal exceeds the second signal threshold as the pressed electrode line The intersection of the row-pressed electrode line and the column-pressed electrode line is positioned as a contact point.
  • the touch screen sets a signal threshold for each touch electrode line, and sets a threshold value of the number of adjacent touch electrode lines whose touch signal exceeds the signal threshold;
  • the set number threshold It can be one or more, and the number threshold can be the touch quantity threshold, the touch quantity threshold, and the holding number, respectively.
  • the threshold value, the grip quantity threshold is greater than the touch quantity threshold, and the touch quantity threshold is greater than or equal to the touch quantity threshold.
  • the touch screen exceeds the signal by the touch signal.
  • the threshold touch electrode line is the touched electrode line, and the intersection of the line touched electrode line and the column touched electrode line is positioned as a touch point; when the touch signal exceeds the signal threshold, the number of adjacent touch electrode lines is more than the touch
  • the touch screen uses the touch electrode line whose touch signal exceeds the signal threshold as the pressed electrode line, and the intersection of the row of pressed electrode lines and the column of pressed electrodes Positioning as a touch point; when the number of adjacent touch electrodes exceeding the signal threshold exceeds the threshold value of the touch threshold, the touch screen uses the touch electrode line whose touch signal exceeds the signal threshold as the held electrode line.
  • the intersection of the row held electrode line and the column held electrode line is positioned as a holding point.
  • the touch screen performs a touch prompt operation on the located touch point; the touch screen performs a touch prompt function or a functional operation on the located touch point, The touch screen does not operate on the positioned grip point.
  • the touch prompting operation performed by the touch screen on the positioned touch point is such that a part of the display screen or the display screen is changed before being touched;
  • the touch-pressing operation performed by the touch screen on the positioned touch pressure point is to change the part of the display screen or the display screen before being touched, or to make the display screen or the display screen partially touched. After being touched, it is changed after being touched and before being touched.
  • the touch function operation performed by the touch system on the positioned touch point includes the touch and movement of a real touch positioning point within a preset time range.
  • the response is an operation that performs a "select” or “drag” or “write” or “zoom in” or “zoom out” or “rotate” function.
  • the thickness of the "writing” stroke changes according to the size of the touch signal, or exceeds the signal with the touch signal.
  • the threshold number of adjacent touch electrode lines changes; the larger the touch signal is, or the more the number of adjacent touch electrode lines exceeds the signal threshold, the thicker the "writing" stroke is.
  • the touch screen determines the possibility of touch by comparing the change amount or the change rate of the touch signal between different rows or different column electrode lines of the plurality of possible touch positioning points. The actual touch positioning point on the electrode line where the positioning point is located.
  • one of the touch screens is one of the touch screens.
  • the intersection of the electrode lines is a touch positioning point; in particular, the center electrode line intersection among a plurality of electrode line intersections satisfying effective touch positioning conditions
  • the cross point is the touch positioning point; or the position of the non-electrode line intersection point may be the touch positioning point.
  • the time characteristic or the amplitude characteristic of the touch signal on the touch electrode line is compared, and the plurality of possible touch positioning points are excluded.
  • Multi-touch "ghost point" to determine the real touch positioning point in multi-touch, making multi-touch possible.
  • a solution for judging the touch strength is also proposed, and the touch is divided into “touch” and “touch” according to the touch force, and different touch operations are implemented to achieve different touch effects.
  • FIG. 1 is a schematic diagram of electrical connections and structures of a first embodiment and a second embodiment of the present invention
  • FIG. 2 is a schematic diagram of electrical connections and structures according to a third embodiment of the present invention.
  • FIG. 3 is a schematic diagram of electrical connections and structures of a fourth embodiment of the present invention.
  • 4a is a schematic diagram of electrical connections and structures of a fifth embodiment of the present invention.
  • 4b is an equivalent circuit diagram of the touch row electrode according to Embodiment 5 of the present invention.
  • FIG. 5 is a waveform diagram of a touch signal according to Embodiment 6 of the present invention.
  • Figure 6 is a schematic view showing the electrical connection and structure of a eighth embodiment of the present invention.
  • Figure 7 is a schematic view showing the electrical connection and structure of a ninth embodiment of the present invention. detailed description
  • the touch screen 100 shown in FIG. 1 has a substrate 110 and a touch circuit 120.
  • the substrate 110 is provided with two sets of row electrode groups 111 each having m row electrode lines and a column electrode group 112 having n column electrode lines. Where m and n are natural numbers greater than 2; the electrode lines of the two rows intersect with each other, and the electrode lines of the same group do not intersect each other; the lead ends of the respective electrode lines in the group are disposed in the same direction, the electrode lines
  • the terminal is an end point of the electrode line extending from the touch area to the touch area, and the touch circuit 120 has a touch excitation source 130, a line touch signal detecting circuit 140, and a column touch signal.
  • the detecting circuit 150; the electrode lines of the row electrode group 111 and the column electrode group 112 are respectively connected to the row touch signal detecting circuit 140 and the column touch signal detecting circuit 150; during the working period of the touch circuit, the touch excitation source pair
  • the two sets of electrode lines or more than two electrode lines in the same group simultaneously apply a touch excitation signal, and the touch signal detection circuit simultaneously or time-divisionally detects the touch signals on each electrode line to detect whether each electrode line is touched. bump.
  • the specific implementation manner is to determine multi-touch.
  • the signal processing solution determines the position of the touch electrode line where the real touch point is located according to the time feature of the touch control point.
  • the operator first touches the intersection of the i-th row and the f-th column (i, f), and the touch signal detecting circuit 140 performs the touch signal detection on the i-th row electrode line in the row electrode group 111.
  • the circuit 150 detects the touch signal satisfying the effective touch condition on the f-th column electrode line in the column electrode group 112; since only one contact has no "ghost point", the touch circuit 120 obtains the intersection point. The judgment of the real touch positioning point on (i, f). Then, the operator touches again the vicinity of the intersection (j, e) of the jth row and the eth column, and the i-th row and the j-th row electrode line of the touch signal detecting circuit 140 in the row electrode line group 111.
  • the upper touch signal detecting circuit 150 detects the touch signals satisfying the effective touch conditions on the e-th column and the f-th row electrode lines in the column electrode group 112; although the row electrode lines i, j and The column electrode lines e and f are all possible touch electrode lines, and three possible touch positioning points (i, e), (j, e), (j, f) are added; The chronological order, after the corresponding touch electrode lines of the existing real touch positioning points (i, f) are the i-th row electrode lines and the f-th column electrode lines, the j-th row electrode with the touch signal is generated.
  • the touch circuit 120 can judge that the intersection point (j, e) is a new real touch positioning point, and the other two possible touch positioning points (i, e), (j, f) It’s just a "ghost point.”
  • the touch screen can perform "prompt operation” or “functional operation” on the detected real touch positioning points (i, f) and (j, e); the “instructive operation” is to make the display or The part of the display screen is changed after being touched, or the operation of "dragging” or “zooming in” or “zooming out” or “rotating” functions; the functional operation is to perform “select” or “drag” “Or” the operation of "writing” or “zooming in” or “zooming out” or “rotating” functions; the “selecting” operation is when the touch screen detects a real touch positioning point, the display screen enters the next display state.
  • the “drag” operation is a partial follow contact movement of the display screen or the display screen when the real touch positioning point moves on the screen;
  • the "zoom in” operation is at two real touch positioning points When moving away from each other, a part of the display screen or the display screen is enlarged;
  • the "reduction” operation is when the two real touch positioning points are close to each other, the display screen or a part of the display screen is reduced;
  • the "rotation” operation is relative to two real touch positioning points When moving, the display screen or a part of the display screen is rotated;
  • the "writing” operation is to generate a handwriting following the contact movement when the real touch positioning point moves on the screen;
  • the interpolation operation may be performed according to the size of the touch signals on the plurality of touch electrode lines to locate the position of the handwriting between the touch electrode lines.
  • the structure and electrical connection of the touch screen 100 are the same as those of the first embodiment.
  • the specific implementation manner is to judge multi-touch, and the signal processing scheme is incompatible with the same-direction terminal.
  • the position of the touch electrode line where the real touch point is located is determined by comparing the size of the touch signal on the different touch electrode lines between the touch electrodes of the same group.
  • the operator simultaneously touches the vicinity of the intersection (i, f) of the i-th row and the f-th column and the intersection (j, e) of the j-th row and the e-th column, and the row touch signal detecting circuit 140 is at the row electrode In the i-th row and the j-th row electrode line of the line group 111, the column touch signal detecting circuit 150 detects that the effective touch is satisfied on the e-th column and the f-th row electrode line in the column electrode group 112, respectively.
  • the touch signal of the condition; the row electrode line i, j and the column electrode line e, f having the touch signal are the touch electrode lines corresponding to the touch touch point, and there may be four touch point points, respectively (i, e), (i, f), (j, e), (j, f).
  • the touch signals on the row electrode lines i and j satisfy the condition of effective touch, the sizes of the touch signals on the row electrode lines i and the row electrode lines j are different, and the touch signal detecting circuit 120 compares the row electrodes.
  • the touch signal on the line j is larger than the amplitude of the touch signal on the row electrode line i, and the real touch positioning point on the row electrode line j is closer to the true touch positioning point on the row electrode line i.
  • the leading end of the electrode line in the four possible touch positioning points (i, e), (i, f), (j, e), (j, f), the possible touch positioning points near the leading end of the row electrode line (j, e) is the real touch positioning point on the row electrode line j, and the possible touch positioning points (i, f) far from the leading end of the row electrode line are the real touch positioning points on the row electrode line i, and the other two
  • the touch sensing points (i, e) and (j, f) are just "ghost points".
  • the touch signal detecting circuit 120 compares the touch signals on the column electrode lines e with respect to the column electrode lines f.
  • the amplitude of the touch signal is large, and the real touch positioning point on the column electrode line e is more than the real touch on the column electrode line f
  • the bit is closer to the leading end of the column electrode line, and in the four possible touch positioning points (i, e), (i, f), (j, e), (j, f), close to the column electrode line leading end
  • the touch positioning point (j, e) may be a real touch positioning point on the column electrode line e, and the possible touch positioning point (i, f) far from the column electrode line leading end is the real touch positioning on the column electrode line f.
  • Point again confirm that the other two possible touch positioning points (i, e), (j, f) are just "ghost points".
  • the touch screen 200 shown in FIG. 2 has a substrate 210 and a touch circuit 220.
  • the substrate 210 is provided with two sets of row electrode groups 211 each having m row electrode lines and a column electrode group 212 having n column electrode lines. Where m and n are natural numbers greater than 2; the electrode lines of the two rows intersect with each other, and the electrode lines of the same group do not intersect each other; the leading ends of the adjacent electrode lines of the row electrode group 211 are disposed in different directions
  • the lead ends of the electrode lines in the column electrode group 212 are disposed in the same direction, and the electrode line leading end refers to the electrode line extending from the touch area to the touch area, on the boundary of the touch area.
  • the touch circuit 220 has a touch excitation source 230 and a touch signal detection circuit.
  • the road electrodes 241 and 241, the column touch signal detecting circuit 250; the row electrode group 211 and the column electrode group 212 are respectively connected to the row touch signal detecting circuit 241, 241 and the column touch signal detecting circuit 250;
  • the touch excitation source simultaneously applies a touch excitation signal to two sets of electrode lines or more than two electrode lines in the same group, and the touch signal detection circuit detects the touch on each electrode line simultaneously or time-divisionally. Control signals to detect if each electrode is touched.
  • the specific implementation manner is to determine multi-touch, and the signal processing scheme is between adjacent touch electrode lines having different leading ends in the same group of electrode lines, and comparing the size of the touch signals on the adjacent touch electrode lines, To determine the position of the touch electrode line where the real touch point is located.
  • the operator simultaneously touches the intersection of the i-th row and the f-th column (i, f) and the intersection of the j-th row and the e-th column (j, e), when the row electrode group on the touch screen 210
  • the touch signal detecting circuits 241 and 242 detect the plurality of row electrode lines i_l, i, i+l, j_l, j, j+1 in the row electrode line group 211.
  • the touch signal detecting circuit 250 detects the touch signal satisfying the effective touch condition on the two column electrode lines e and f in the column electrode group 212;
  • the row electrode lines i_l, i, i+l, j_l, j, j+1 and the column electrode lines e, f of the control signal are the touch electrode lines corresponding to the touch sensing points;
  • the control object is at a representative position coordinate point within the touch screen touch range, so there may be four touch positioning points, namely (i, e), (i, f), (j, e), ( j, f).
  • touch signal detection The circuit 220 compares the sizes of the touch signals on the adjacent row electrode lines i_l, i, i+1, and obtains that the touch signals on the row electrode lines i_l, i+1 have larger amplitudes than the touch signals on the row electrode lines i.
  • the real touch positioning point on the row electrode line i is closer to the leading end of the row electrode lines i-1 and i+1, at the four possible touch positioning points (i, e), (i, f), ( j, e), (j, f), the possible touch positioning points (i, f) near the leading ends of the row electrode lines i-1 and i+1 are the real touch positioning points on the row electrode line i, away from the line
  • the possible touch positioning points (i, e) of the electrode lines i-1 and i+1 are the "ghost points"; likewise, the touch signal detecting circuit 220 compares the adjacent row electrode lines j_l, j, j+1 The size of the touch signal is obtained, and the touch signal on the row electrode line j is larger than the touch signal on the row electrode lines j_l, j+1, and the real touch positioning point on the row electrode line j is closer.
  • the possible touch positioning points near the leading end of the row electrode line j (j, e) is the real touch positioning point on the row electrode line j
  • the possible touch positioning point (j, f) away from the row electrode line j is the "ghost point"; for the sake of safety, it can be "touched” from the column direction
  • the dot signal and the ghost point are judged once, and the touch signal detecting circuit 220 compares the size of the touch signal on the column electrode lines e and f, and obtains the touch signal on the column electrode line e compared with the column electrode line f.
  • the amplitude of the control signal is large, and the actual touch positioning point on the column electrode line e is closer to the column electrode line than the real touch positioning point on the column electrode line f.
  • the possible touch near the leading end of the column electrode line The positioning point (j, e) is a real touch positioning point on the column electrode line e, and the possible touch positioning point (i, f) far from the column electrode line leading end is a real touch positioning point on the column electrode line f, and
  • the two possible touch points (i, e), (j, f) are just "ghost points".
  • one of the electrode line intersection points is a touch positioning point;
  • the intersection of the center electrode lines in the intersection of the plurality of electrode lines satisfying the effective touch positioning condition is a touch positioning point.
  • the touch screen can also determine the actual touch positioning point on the electrode line where the touch positioning point is located by comparing the change amount or the change rate of the touch signal between the electrode lines.
  • the touch screen 300 shown in FIG. 3 has a substrate 310 and a touch circuit 320.
  • the substrate 310 is provided with two sets of row electrode groups 311 each having m row electrode lines and a column electrode group 312 having n column electrode lines. Where m and n are natural numbers greater than 2; the electrode lines of the two rows intersect with each other, and the electrode lines of the same group do not intersect each other; the electrode lines of the row electrode group 311 are provided with the terminals at both ends of the line
  • Each of the electrode lines of the column electrode group 312 is provided with a lead end at a single end in the same direction, and the electrode line lead end extends from the touch area to the touch area, at the boundary of the touch area.
  • the touch circuit 320 has a touch excitation source 330, row touch signal detecting circuits 341 and 341, and a column touch signal detecting circuit 350.
  • the electrode lines of the row electrode group 311 and the column electrode group 312 are respectively connected to each other.
  • the touch signal detecting circuit detects the touch signals on each electrode line at the same time or in a time-sharing manner to detect whether each electrode is touched.
  • the specific implementation manner is to determine multi-touch.
  • the signal processing scheme is an electrode line of a row electrode group 311 having terminals at both ends. The size of the touch signal on the two terminals of the same electrode line is compared to determine the trueness. The position of the touch point on the touch electrode line.
  • the operator simultaneously touches the vicinity of the intersection (i, f) of the i-th row and the f-th column and the intersection (j, e) of the j-th row and the e-th column, and the touch signal detecting circuits 341, 342 are The touch signals satisfying the effective touch conditions are detected on the two row electrode lines i, j in the row electrode group 311, and the column touch signal detecting circuit 350 is in the column electrode group 312.
  • the touch signals satisfying the effective touch conditions are detected on the two column electrode lines e and f; the row electrode lines i, j and the column electrode lines e and f having the touch signals are corresponding to the touch touch points.
  • the touch electrode line so there may be four touch points, which are (i, e), (i, f), (j, e), (j, f). Although both ends of the row electrode lines i and j have touch signals, the sizes of the touch signals at both ends are different, and the touch circuit 320 compares the size of the touch signals at both ends of the row electrode lines i to obtain row electrodes.
  • the touch signal on the side of the line i near the touch signal detecting circuit 342 is larger than the amplitude of the touch signal on the side of the touch signal detecting circuit 341, and the real touch on the line electrode i
  • the control positioning point is closer to the leading end of the touch signal detecting circuit 342 - in the four possible touch positioning points (i, e), (i, f), (j, e), (j, f)
  • the possible touch positioning points (i, f) near the row electrode line i at the side of the touch signal detecting circuit 342 are the real touch positioning points on the row electrode line i, and the touch signal detection is near the row electrode line i.
  • Circuit 341 - the possible touch positioning point (i, e) of the side lead is the "ghost point"; likewise, the touch circuit 320 compares the size of the touch signal at both ends of the row electrode line j to obtain the proximity of the row electrode line j
  • the control signal detecting circuit 341 - the touch signal on the side lead is closer to the touch signal detecting circuit 342
  • the amplitude of the touch signal on the side lead is large, and the actual touch positioning point on the row electrode line j is closer to the leading end of the touch signal detecting circuit 341, at the four possible touch positioning points (i , e), (i, f), (j, e), (j, f), the possible touch positioning points (j, e) near the row electrode line j at the side of the touch signal detecting circuit 341
  • the real touch positioning point on the row electrode line j is close to the row electrode line j.
  • the possible touch positioning point (j, f) at the side of the touch signal detecting circuit 342 is the "
  • the touch electrode lines having the terminals at both ends may be row electrode lines, column electrode lines, or row and column electrodes, and both have bidirectional terminals.
  • the touch screen can perform "prompt operation” or "functional operation” on the detected real touch positioning point; the “presentation operation” is to make the display screen or the part of the display screen be touched after being touched.
  • the operation of the "or” rotation function; the “select” operation is when the touch screen detects the real touch positioning point, the display screen enters the next display state; the “drag” operation is true When the touch positioning point moves on the screen, the partial display of the display screen or the display screen follows the contact movement; the “magnification” operation is when the two real touch positioning points are away from each other, the display screen or the partial portion of the display screen is Zooming in; the “zooming out” operation is when the two real touch positioning points are close to each other, the display screen or the portion
  • the "writing" operation is to generate a handwriting following the contact movement when the real touch positioning point moves on the screen;
  • the interpolation operation may be performed according to the size of the touch signals on the plurality of touch electrode lines to locate the position of the handwriting between the touch electrode lines.
  • the touch screen 400 shown in FIG. 4a has a substrate 410 and a touch circuit 420.
  • the substrate 410 is provided with two sets of row electrode groups 411 having m row electrode lines and column electrode groups 412 having n column electrode lines. Where m and n are natural numbers greater than 2; the electrode lines of the two rows intersect with each other, and the electrode lines of the same group do not intersect each other; the leading ends of the electrode lines of the group are disposed in the same direction, the electrode lines
  • the terminal end refers to an end point of the electrode line extending from the touch area to the touch area and at the boundary of the touch area; the touch circuit 420 has the touch excitation source 430 and the line signal detecting circuit 440 and the column touch signal detecting circuit.
  • each electrode line of the row electrode group 411 and the column electrode group 412 are respectively connected to the row touch signal detecting circuit 440 and the column touch signal detecting circuit 450; during the working period of the touch circuit, the touch excitation source is paired
  • the electrode line or the pair of electrode lines in the same group simultaneously apply a touch signal, and the touch signal detecting circuit detects the touch signals on each electrode line at the same time or in a time-sharing manner to detect whether each electrode is touched.
  • the specific implementation manner is to determine multi-touch, and the signal processing scheme is that the intersection of the touch electrode line whose touch signal exceeds the signal threshold is a possible touch positioning point, and through different combinations of all possible touch positioning points, The size of the touch signal of the touch electrode line is compared with the size of the touch signal actually measured by the touch electrode line to determine that one or more real touch points on the touch electrode line are touched. Control the position on the electrode line.
  • the operator simultaneously touches the intersection of the i-th row and the e-th column (i, e), the intersection of the i-th row and the g- th column
  • the row touch signal detecting circuit 440 In the vicinity of (i, g), and in the vicinity of the intersection (j, f) of the jth row and the fth column, the row touch signal detecting circuit 440 is on both row electrode lines i, j in the row electrode group 411 A touch signal that satisfies the effective touch condition is detected, and the column touch signal detecting circuit 450 detects the touch signal satisfying the effective touch condition on the three column electrode lines e, f, and g in the column electrode group 412.
  • the row electrode lines i, j and the column electrode lines e, f, g having the touch signals are the touch electrode lines corresponding to the touch positioning points, so there may be six touch positioning points, respectively (i , e), (i, f), (i, g), (j, e), (j, f), (i, g).
  • FIG. 4b is a circuit model in which a finger touches a touch electrode line, where r is a resistance value of the row electrode line between adjacent column electrode lines, and Cf is a coupling capacitance between the finger touching the electrode line and the touch electrode line.
  • the coupling capacitance Cf between the finger and the touch electrode line is at the three column electrode lines e, f, g.
  • the row electrode line i or the row electrode line j is connected in a mathematical combination manner, and the size of the touch signal on the row electrode line i or the row electrode line j is calculated by fitting, and the row electrode line i or row is electrically connected.
  • the fitting calculation value of the coupling capacitor Cf is connected to the row electrode line i at the e-th column and the g-th column, which is consistent with the actually-measured touch signal size on the row electrode line i;
  • the fitting calculation value of the coupling capacitor Cf is connected at the f-th column, which coincides with the actually-measured touch signal size on the row electrode line j; thereby obtaining the intersection of the real touch positioning point in the ith row and the e-th column.
  • intersection of the point (i, e), the intersection of the i-th row and the g-th column (i, g), the intersection of the j-th row and the f-th column (j, f), and the six possible touch positioning points The remaining three (i, f), (j, e), (i, g) are just "ghost points.”
  • the touch screen performs a functional operation on the touch on the real touch positioning point, and the functional operation is to perform a "select” or “drag” or “write” or “zoom in” or “zoom out” or “rotate” function
  • the “select” operation is when the touch screen detects the real touch positioning point, the display screen enters the next display state; the "drag” operation is at the real touch positioning point on the screen When moving up, the partial display contact movement of the display screen or the display screen is performed; when the two real touch positioning points are away from each other, the display screen or a part of the display screen is enlarged; “Operation, when the two real touch positioning points are close to each other, the display screen or the part of the display screen is reduced; the "rotation” operation is to display the screen or display when the two real touch positioning points are relatively rotated.
  • the touch screen has a substrate and a touch circuit, and two rows of row electrode groups and column electrode groups are disposed on the substrate; the electrode lines of the two groups intersect with each other, and the electrode lines in the same group do not intersect each other; the touch circuit has touch The excitation source and the touch signal detecting circuit, the electrode lines of the row electrode group and the column electrode group are connected to the touch signal detecting circuit; in the working period of the touch circuit, the touch excitation source is opposite to the two sets of electrode lines or the same More than two electrode lines in the group are simultaneously provided with a touch excitation signal, and the touch signal detection circuit detects the touch signals on each electrode line at the same time or in a time-sharing manner to detect whether each electrode is touched.
  • the specific implementation manner is to determine the effective touch and touch intensity.
  • the signal processing scheme determines the touch force on the contact by comparing the touch signal amplitude with the preset signal threshold, and then determines that the touch is “touch”. "Or “touch”, perform the operation corresponding to "touch” or "touch”.
  • two signal thresholds T1 and T2 are set for each touch electrode line, and the first signal threshold T1 is smaller than the second signal threshold ⁇ 2; the touch signal detecting circuit detects that the touch electrode line has a touch signal S.
  • the touch circuit compares the touch signal S on the touch electrode line with a preset signal threshold, and the first signal threshold T1 is a touch threshold.
  • the second signal threshold T2 is a touch threshold, and the second signal threshold ⁇ 2 is greater than the first signal threshold T1.
  • the touch electrode line When the touch signal S1 on the touch electrode line is smaller than the first signal threshold T1, the touch electrode line is considered to be the untouched electrode line; when the touch signal S2 on the touch electrode line is greater than the first signal threshold T1 When the second signal threshold is less than ⁇ 2, the touch electrode line is considered to be the touched electrode line, and the intersection of the touched electrode line and the column touched electrode line is positioned as a touch point; when the touch signal on the touch electrode line is S3 When the second signal threshold is greater than ⁇ 2, the touch electrode line is considered to be the pressed electrode line, and the intersection of the row of pressed electrode lines and the column of pressed electrode lines is positioned as a contact point.
  • the touch screen performs an "instructive operation” on the positioned touch points, and performs “prompting operation” or “functional operation” on the positioned touch points.
  • “Prompt operation” is to make the display screen or part of the display screen change before being touched; the “functional operation” of the touch pressure includes the touch pressure of the contact within the preset time range.
  • the response to the move, the response is to perform a "select” or “drag” or “write” or "zoom in” or “zoom out” or
  • the touch screen has a substrate and a touch circuit, and the row electrode group and the column electrode group are disposed on the substrate; the electrode lines of the two groups intersect with each other, and the electrode lines of the same group do not intersect each other; the touch circuit has a touch excitation source And the touch signal detecting circuit, the electrode lines of the row electrode group and the column electrode group are connected to the touch signal detecting circuit; during the working period of the touch circuit, the touch excitation source is paired with two sets of electrode lines or within the same group More than two electrode lines are simultaneously provided with a touch excitation signal, and the touch signal detection circuit detects the touch signals on each electrode line at the same time or in a time-sharing manner to detect whether each electrode is touched.
  • the signal processing scheme is to set a signal threshold ⁇ and a quantity threshold ⁇ , and compare the number of adjacent touch electrode lines and the number threshold by the touch signal exceeding the signal threshold to determine the touch force on the contact, and then determine the touch. It is “touch” or “touch”, and performs the operation corresponding to "touch” or “touch”.
  • the touch panel has a touch electrode line whose touch signal exceeds a signal threshold.
  • the touch screen exceeds the signal threshold by the touch signal.
  • the control electrode line is a touched electrode line, and the intersection of the line touched electrode line and the column touched electrode line is positioned as a touch point; when the number of adjacent touch electrode lines whose touch signal exceeds the signal threshold exceeds the threshold value,
  • the touch screen uses the touch electrode line whose touch signal exceeds the signal threshold as the pressed electrode line, and positions the intersection of the line pressed electrode line and the column pressed electrode line as the contact point.
  • the touch signal detecting circuit detects that there is a touch signal on the touch electrode line, and the touch circuit compares the touch signal on the touch electrode line with a preset signal threshold ⁇ , and the touch signal on the touch electrode line When the signal threshold is less than ⁇ , the touch electrode line is considered to be untouched; when the touch signal on the touch electrode line is greater than the signal threshold ⁇ The touch electrode line whose touch signal on the line is greater than the signal threshold ⁇ is the touched electrode line, and the touch circuit detects that the touch signal adjacent to the touched electrode line is greater than the signal threshold T.
  • the number of lines n the touch circuit compares the number n of touch electrode lines with the number threshold N, and considers the touched electrode line when the number n of touch electrode lines whose adjacent touch signals are greater than the signal threshold T is less than the threshold value N For the touched electrode line, the intersection of the touched electrode line and the column touched electrode line is positioned as a touch point; when the number n of the touch electrode lines whose adjacent touch signals are greater than the signal threshold T is greater than the number threshold N, The touched electrode line is the pressed electrode line, and the intersection of the row of pressed electrode lines and the column of pressed electrode lines is positioned as a contact point.
  • the touch screen performs an "instructive operation” on the positioned touch points, and performs “prompting operation” or “functional operation” on the positioned touch points.
  • the “presentation operation” is an operation of causing a part of a display screen or a display screen to be changed after being touched, or “dragging" or “zooming in” or “zooming out” or “rotating” functions;
  • “Functional operation” includes having a response to the contact and movement of the contact within a preset time range, the response being a “select” or “drag” or “write” or “zoom in” or “zoom out” Or the operation of the "rotation” function; when the touch screen detects the real touch positioning point, the display screen enters the next display state; the "drag” operation is in the real touch When the control positioning point moves on the screen, the partial display contact movement of the display screen or the display screen is performed; when the two real touch positioning points are away from each other, the display screen or the part of the display screen is enlarged.
  • the “zoom out” operation is when the two real touch positioning points are close to each other, the display screen or the part of the display screen is reduced; the “rotation” operation is when the two real touch positioning points are relatively rotated. a part of the display screen or the display screen is rotated; the "writing” operation is to generate a handwriting following the movement of the contact point on the display screen when the real touch positioning point moves on the screen, performing "writing” When doing this, the thickness of the "writing” stroke changes with the size of the touch signal. The larger the touch signal, the thicker the "writing” stroke, and the "writing” operation can also be based on multiple touch electrodes. The size of the touch signal is interpolated to locate the position of the handwriting between the touch electrode lines.
  • one of the electrode line intersection points is a touch positioning point;
  • the intersection of the center electrode lines in the intersection of the plurality of electrode lines satisfying the effective touch positioning condition is the touch positioning point; or the position of the intersection of the non-electrode lines may be the touch positioning point.
  • the touch screen 600 shown in FIG. 6 has a substrate 610 and a touch circuit 620.
  • the substrate 610 is provided with two sets of row electrode groups 611 each having m row electrode lines and a column electrode group 612 having n column electrode lines. Where m and n are natural numbers greater than 2; the electrode lines of the two rows intersect with each other, and the electrode lines of the same group do not intersect each other;
  • Each of the electrode lines of the 611 group is provided with a lead end at the single end in the same direction on the line, and each of the electrode lines of the column electrode group 612 is provided with a lead end at the single end in the same direction on the line, and the electrode line lead end is
  • the finger electrode 620 has a touch excitation source 630, a touch signal detection circuit 640, and a column touch signal detection circuit 650; the touch circuit 620 has an end point on the boundary of the touch area;
  • the electrode lines of the row electrode group 611 and the column electrode group 612 are respectively connected to the row touch signal detecting
  • the specific implementation manner is to determine effective touch and touch strength.
  • the signal processing scheme is to set a signal threshold ⁇ for each touch electrode line of the touch screen, and set the number of adjacent touch electrode lines whose touch signal exceeds the signal threshold.
  • the number of thresholds N1, ⁇ 2, and ⁇ 3, the touch electrode line whose touch signal exceeds the signal threshold is the position of the touched electrode line, and according to whether the number of adjacent touch electrode lines exceeding the signal threshold exceeds the threshold number of touches, Nl, touch pressure
  • the quantity threshold ⁇ 2 or the holding quantity threshold ⁇ 3 determines whether the touch is in a touch, touch or holding state; the holding quantity threshold ⁇ 3 is greater than the touch quantity threshold ⁇ 2, and the touch quantity threshold ⁇ 2 is greater than or equal to The number of touch thresholds N1.
  • the operator simultaneously touches all the row electrode lines between the i-th row to the j-th row and all the column electrode lines between the e-th column and the f-th column, and the row touch signal detecting circuit 640 is in the row electrode line group 611.
  • a touch signal exceeding a signal threshold T is detected on all of the row electrode lines between the row electrode lines i and j, and the column touch signal detecting circuit 650 is in the column electrode line 612.
  • a touch signal exceeding a signal threshold T is detected on all of the column electrode lines; all rows between the row electrode lines i and j having the touch signal and the column electrode lines e, f
  • the electrode is the touch electrode line corresponding to the touch positioning point; the number of row level lines (j-i+1) between the row electrode lines i and j exceeding the signal threshold is compared with the number thresholds N1, N2 and N3 In comparison, the number of electric level lines (f-e+1) between the column electrode lines e, f exceeding the signal threshold is simultaneously compared with the column number thresholds N1, N2 and N3.
  • the touch screen does not perform an operation on the grip area.
  • the threshold number N3 is held, and at least one of the thresholds is greater than the threshold value N2
  • the row electrode line whose touch signal exceeds the signal threshold is the pressed electrode line, and the column signal line whose touch signal exceeds the signal threshold is pressed.
  • the touch threshold number N2 is greater than the touch threshold value N1
  • the row electrode line whose touch signal exceeds the signal threshold is the touched electrode line
  • the column electrode line whose touch signal exceeds the signal threshold is the touched electrode line.
  • the middle line of all the rows of the touched electrode lines is taken as a row representative line
  • the middle line of all the touched electrode lines is a column representative line
  • the intersection of the row representative line and the column representative line is positioned as a touch point;
  • the positioned touch points implement a touch prompt operation.
  • the row electrode line whose touch signal exceeds the signal threshold is the pressed electrode line, and the touch signal exceeds
  • the column electrode line of the signal threshold is the erected electrode line.
  • the touch screen 700 shown in FIG. 7 has a substrate 710 and two touch circuits 720.
  • the substrate 710 is provided with two sets of row electrode groups 711 having m row electrode lines and column electrode groups 712 having n column electrode lines. Where m and n are natural numbers greater than 2; the electrode lines of the two rows intersect with each other, and the electrode lines of the same group do not intersect each other; the electrode lines of the row electrode group 711 are disposed at the single end in the same direction on the line.
  • each of the electrode lines of the column electrode group 712 is provided with a terminal end at the single end in the same direction on the line, and the electrode wire terminal end extends from the touch area to the outside of the touch area.
  • the touch circuit 720 has a touch excitation source 730, a row touch signal detection circuit 740, and a column touch signal detection circuit 750; the electrode groups of the row electrode group 711 and the column electrode group 712 are respectively connected.
  • the specific implementation manner is to determine an effective touch.
  • the signal processing scheme is to set a signal threshold ⁇ for each touch electrode line of the touch screen, and set a threshold value of the number of adjacent touch electrode lines whose touch signal exceeds the signal threshold.
  • ⁇ and ⁇ the touch electrode line whose touch signal exceeds the signal threshold is the position of the touched electrode line, and according to whether the number of adjacent touch electrode lines exceeding the signal threshold exceeds the touch number threshold N1, the touch number threshold ⁇ 2 or Holding the threshold value ⁇ 3, determining that the touch is in a touch, touch, or holding state; the holding quantity threshold ⁇ 3 is greater than the touch quantity threshold ⁇ 2, and the touch quantity threshold ⁇ 2 is greater than or equal to the touch quantity threshold Nl.
  • the operator's palm supports the row electrode line between the i-th row to the j-th row on the touch screen and the column electrode line between the f-th column and the g-th column, and the touch signal detecting circuit 740 is on the row electrode line.
  • a touch signal exceeding a signal threshold T is detected on the row electrode line between the row electrode lines i and j in the group 711, and the column touch line detection unit 750 is in the column electrode line 712.
  • a touch signal exceeding the signal threshold T is detected on the column electrode line between g; while the operator supports the touch screen on the touch screen, the index finger also touches the electrode line of the jth line on the touch screen and the first The area where the e-column line intersects, the touch signal detecting circuit 740 detects a touch signal exceeding the signal threshold T in the vicinity of the row electrode line j in the row electrode group 711, and the column touch signal detecting circuit 750 is in the column.
  • a touch signal exceeding the signal threshold T is detected in the vicinity of the column electrode line e in the electrode line group 712.
  • the touch screen uses the column electrode line e as the pressed electrode line, and the intersection of the number of row electrode lines j and the pressed electrode line e is positioned as a contact point.
  • the touch screen has a holding area and a touch point, that is, the support area of the palm on the touch screen and the touch point of the index finger are detected; thus the touch screen can touch the positioned index finger.
  • the point is implemented by a touch-sensitive or functional operation without performing any operation on the support area of the palm of the touch screen.

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Abstract

L'invention concerne une méthode de traitement de signal pour un écran à commande tactile et, en particulier, une méthode de traitement de signal pour un écran à commande tactile capacitif et un afficheur à panneau plat à commande tactile. Sans nécessiter de calculs simulés compliqués, le « point de contact » et le « point fantôme » pendant la commande tactile multipoint peuvent être distingués et les points de localisation de commande tactile réels pendant la commande tactile multipoint peuvent être déterminés en comparant les séquences temporelles générées par les signaux de commande tactile sur différents fils d'électrode de commande tactile, ou en comparant les tailles des signaux de commande tactile sur différents fils d'électrode de commande tactile, ou en simulant l'amplitude du signal de commande tactile sur un fil d'électrode de commande tactile unique, de manière à rendre la commande tactile multipoint possible. L'invention concerne également une méthode pour juger d'une intensité de contact. En répartissant les commandes tactiles entre « toucher » et « presser » en fonction de l'intensité du contact et en effectuant différentes opérations de commande tactile, les différents effets de commandes tactiles peuvent être obtenus.
PCT/CN2010/073972 2010-06-13 2010-06-13 Méthode de traitement de signal pour un écran à commande tactile WO2011156953A1 (fr)

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CN2010800017002A CN102439545A (zh) 2010-06-13 2010-06-13 一种触控屏的信号处理方案

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CN104020868A (zh) * 2013-02-28 2014-09-03 联想(北京)有限公司 一种信息处理的方法及电子设备
CN104020868B (zh) * 2013-02-28 2017-09-01 联想(北京)有限公司 一种信息处理的方法及电子设备
CN104484076A (zh) * 2014-12-31 2015-04-01 深圳市华星光电技术有限公司 自电容触摸感测装置及触摸点定位方法、显示设备
CN104484076B (zh) * 2014-12-31 2018-02-13 深圳市华星光电技术有限公司 自电容触摸感测装置及触摸点定位方法、显示设备

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