US20210109635A1 - Touch panels and driving control methods thereof, touch display devices - Google Patents

Touch panels and driving control methods thereof, touch display devices Download PDF

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Publication number
US20210109635A1
US20210109635A1 US16/462,456 US201816462456A US2021109635A1 US 20210109635 A1 US20210109635 A1 US 20210109635A1 US 201816462456 A US201816462456 A US 201816462456A US 2021109635 A1 US2021109635 A1 US 2021109635A1
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Prior art keywords
electrode
touch
film layer
electrodes
touch panel
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US16/462,456
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English (en)
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Lei An
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Yungu Guan Technology Co Ltd
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Yungu Guan Technology Co Ltd
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Assigned to YUNGU (GU'AN) TECHNOLOGY CO., LTD. reassignment YUNGU (GU'AN) TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AN, Lei
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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
    • G06K9/0004—
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing

Definitions

  • the disclosure relates to touch technologies, and in particular, to touch panels and driving control methods thereof, and touch display devices.
  • touch display devices have been increasingly sought after by people, which not only save space, being convenient to carry, but also allow users to directly operate using their fingers or stylus, comfortably and very conveniently.
  • touch display devices have been applied in various technical fields, such as personal digital processing (PDA), touch intelligent mobile terminals (such as mobile phones), portable notebook computers in the market, and the like.
  • PDA personal digital processing
  • touch intelligent mobile terminals such as mobile phones
  • portable notebook computers in the market, and the like.
  • a touch film layer and a fingerprint identification film layer are currently separately wired, resulting in a large number of wirings and dense wiring in the fingerprint identification area, which easily blocks the light emitted from a touch panel.
  • Exemplary embodiments of the disclosure provide touch panels and driving control methods thereof, touch display devices to solve above technical problems existed in the prior art.
  • a touch panel comprises a first electrode, a second electrode, and a third electrode.
  • the first electrode, the second electrode, and the third electrode are insulated from each other.
  • the first electrode and the second electrode are crosswise arranged to form a touch film layer, and the second electrode and the third electrode are crosswise arranged to form a fingerprint identification film layer.
  • the first electrode is a touch driving electrode
  • the third electrode is a fingerprint driving electrode
  • the second electrode is a common inductive electrode of the touch film layer and the fingerprint identification film layer
  • the first electrode is a touch inductive electrode
  • the third electrode is a fingerprint inductive electrode
  • the second electrode is a common driving electrode of the touch film layer and the fingerprint identification film layer.
  • the fingerprint identification film layer is correspondingly arranged on a preset target area of the touch panel, and the preset target area is a specific partial area or an entire area of the touch panel.
  • a line width of the second electrode corresponding to the preset target area is smaller than a first threshold, and/or a central spacing of adjacent second electrodes corresponding to the preset target area is less than a second threshold.
  • a line width of the second electrode corresponding to the preset target area ranges from 3 ⁇ m to 5 ⁇ m
  • the central spacing of adjacent second electrodes corresponding to the preset target area ranges from 8 ⁇ m to 12 ⁇ m.
  • the second electrode is arranged between a film layer in which the first electrode is located and a film layer in which the third electrode is located.
  • the touch panel further comprises: a display film layer, being provided with a plurality of illuminating sub-pixels arranged in an array.
  • An orthographic projection of an electrode pattern of the fingerprint identification layer on the touch film layer does not overlap an orthographic projection of the illuminating sub-pixels of the display film layer on the touch film layer.
  • the second electrode corresponding to the preset target area has a hollow pattern.
  • a method of driving and controlling a touch panel comprising a first electrode, a second electrode, and a third electrode, and the first electrode, the second electrode, and the third electrode are insulated from each other, and the first electrode and the second electrode are crosswise arranged to form a touch film layer, and the second electrode and the third electrode are crosswise arranged to form a fingerprint identification film layer.
  • the method comprises:
  • a touch display device comprising a touch panel.
  • the touch panel includes a first electrode, a second electrode, and a third electrode; and the first electrode, the second electrode, and the third electrode are insulated from each other, and the first electrode and the second electrode are crosswise arranged to form a touch film layer, and the second electrode and the third electrode are crosswise arranged to form a fingerprint identification film layer.
  • a first electrode and a second electrode may form a touch film layer by a common second electrode, and the second electrode and a third electrode may also form a fingerprint identification film layer, thereby the wiring number and the wiring intensity on the touch panel may be reduced, and the blocking to the illuminating sub-pixels of the display film layer may be reduced.
  • the touch function and the fingerprint identification function can be respectively achieved by the second electrode on the touch panel, thereby improving the utilization ratio of the common electrode and simplifying the structural design.
  • FIG. 1 is a schematic view of a touch panel provided by the disclosure.
  • FIGS. 2( a ) and 2( b ) are respectively two schematic views of touch panels with common second electrodes involved in the disclosure.
  • FIGS. 3( a ) and 3( b ) are schematic views of touch panels with fingerprint identification film layers provided by the disclosure.
  • FIG. 4 is a schematic cross-sectional view of a touch panel provided by the disclosure.
  • FIG. 5( a ) and FIG. 5( b ) are schematic views showing connection relationships of pins in a switching process between a touch function and a fingerprint identification function of a touch panel provided by the disclosure;
  • FIG. 6( a ) and FIG. 6( b ) are schematic views showing connection relationships of pins in a switching process between a touch function and a fingerprint identification function of a touch panel provided by the disclosure.
  • FIG. 1 is a schematic view of a touch panel provided by the disclosure, the touch panel includes a plurality of first electrodes 11 extending in a first direction (such as a lateral x direction in FIG. 1 ), a plurality of second electrodes 12 extending in a second direction (such as a longitudinal y direction in FIG. 1 ), and a plurality of third electrodes 13 extending in a third direction (such as a longitudinal y direction in FIG. 1 ).
  • a first direction such as a lateral x direction in FIG. 1
  • second electrodes 12 extending in a second direction
  • a plurality of third electrodes 13 extending in a third direction (such as a longitudinal y direction in FIG. 1 ).
  • All of the first electrode 11 , the second electrode 12 , and the third electrode 13 are insulated from each other, and the first electrode 11 and the second electrode 12 are arranged crosswise to form a touch film layer, and the second electrode 12 and the third electrode 13 are arranged crosswise to form a fingerprint identification film layer.
  • the crossed angle between the first electrode 11 and the second electrode 12 is not limited, and the crossed angle between the second electrode 12 and the third electrode 13 is not limited. Then, the extending directions of the first electrode 11 and the third electrode 13 may be the same, or has a certain crossed angle.
  • a first electrode and the second electrode may form a touch film layer and the second electrode and a third electrode may also form a fingerprint identification film layer, thereby a wiring number and a wiring intensity on a touch panel may be reduced, and a blocking of illuminating sub-pixels of a display film layer may be reduced.
  • a touch function and a fingerprint identification function can respectively achieved by the second electrode on the touch panel, thereby improving an utilization ratio of the common electrode and simplifying a structural design.
  • the second electrode is a common electrode, and in particular, at least the following structural design may exist:
  • a first electrode RX is a touch inductive electrode
  • a third electrode rx is a fingerprint inductive electrode
  • a second electrode Tx is a common driving electrode of a touch film layer and a fingerprint identification film layer. Therefore, the structure 1 takes the second electrode as a common touch electrode to realize a touch function and a fingerprint identification function, thereby improving an utilization ratio of the common electrode, and simplifying a structural design.
  • a first electrode TX is a touch driving electrode
  • a third electrode tx is a fingerprint driving electrode
  • a second electrode Rx is a common inductive electrode of a touch film layer and a fingerprint identification film layer. Therefore, the structure 2 takes the second electrode as a common inductive electrode to realize a touch function and a fingerprint identification function, thereby improving a utilization ratio of the common electrode, and simplifying a structural design.
  • a fingerprint identification film layer is correspondingly arranged on a preset target area of a touch panel which is a specific partial area or an entire area of the touch panel.
  • the fingerprint identification film layer may be distributed in a partial area of the touch panel, that is, a specific partial area, so that the fingerprint identification and touch may be achieved based on a common electrode, which is designed partly, simplifying the structure, or is distributed in the entire panel of the touch panel, thereby achieving the full-screen fingerprint identification.
  • a fingerprint identification film layer (a film layer formed by a second electrode and a third electrode being crosswise insulated from each other) is arranged correspondingly in a specific partial area of a touch panel S (the dotted line frame area in the drawing).
  • a line width of a second electrode corresponding to the preset target area i.e., the specific partial area
  • a central spacing of adjacent second electrodes corresponding to the preset target area i.e., the specific partial area
  • the first threshold is a maximum line width that may be used for realizing fingerprint identification. If the line width is exceeded, the fingerprint may not be effectively identified.
  • the second threshold is a maximum central distance that may be used for realizing fingerprint identification. If the central distance is exceeded, the fingerprint may not be effectively identified.
  • the second electrode of the preset target area as long as one of the above two conditions is satisfied, or the above two conditions are both satisfied, the fingerprint may be effectively identified.
  • the line width of the second electrode corresponding to the preset target area ranges from 3 ⁇ m to 5 ⁇ m
  • the central distance of the adjacent second electrode corresponding to the preset target area ranges from 8 ⁇ m to 12 ⁇ m.
  • Line widths and central distances of second electrodes corresponding to an area outside the preset target area may be designed according to specifications of touch electrodes, as long as the touch function can be realized.
  • a fingerprint identification film layer is arranged correspondingly in an entire panel of a touch panel S (the dotted frame area in the figure), so that line widths of all second electrodes are less than a first threshold. And/or, a central spacing of adjacent second electrodes corresponding to the preset target area is less than a second threshold.
  • a second electrode may be arranged on a surface of a first electrode (i.e., a surface of the first electrode far away from the third electrode), or arranged on a surface of the third electrode (i.e., a surface of the third electrode far away from the first electrode), or between the film layer where the first electrode is located and the film layer where the third electrode is located, which is not limited in the disclosure.
  • the second electrode is a common electrode, preferably, it is arranged between the film layer where the first electrode is located and the film layer where the third electrode is located.
  • a touch panel further includes: a display film layer 14 provided with a plurality of illuminating sub-pixels 141 arranged in an array; a fingerprint identification layer, and an orthographic projection of an electrode pattern M (the third electrode 13 and the second electrode 12 a corresponding to the preset target area) on the touch film layer in the fingerprint identification layer does not overlap an orthographic projection of the illuminating sub-pixels 141 on the touch film layer in the display film layer 14 . Therefore, the illuminating sub-pixels in the display film layer are reasonably avoided, avoiding the fingerprint identification layer blocking the illuminating sub-pixels in the display film layer, thereby ensuring the illuminating efficiency of the touch panel.
  • an orthographic projection of the electrode pattern on the touch film layer in the fingerprint identification film layer and the orthographic projection of the illuminating sub-pixels on the touch film layer in the display film layer partly overlap with each other.
  • the second electrode corresponding to the preset target area has a hollow pattern.
  • the orthographic projection of the second electrode is generally designed to be located at a gap of the illuminating sub-pixels.
  • a pitch of the illuminating sub-pixels is respectively small, and gaps are respectively narrow.
  • a second electrode may be designed at two gaps respectively, and the second electrode is divided into two thin lines.
  • the second electrode In a corresponding position where the illuminating sub-pixels is sandwiched by the two gaps, the second electrode is hollowed, so that the illuminating sub-pixels may be reasonably avoided, and sufficient capacitance may be ensured to realize fingerprint identification.
  • the hollow structure is not limited to the above example, and a second electrode may be arranged at a plurality of gaps. At positions corresponding to illuminating sub-pixels between adjacent gaps, second electrodes are hollow.
  • a shape of the first electrode and patterns of second electrodes outside the preset target area are not limited, and may be a diamond or a strip electrode pattern.
  • the disclosure further provides a touch display device, comprising any one of the above touch panels.
  • the touch display device may be any products or components with display functions, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a smart wearable device, a VR, an AR, and the like.
  • Other indispensable components of the display device are understood by those skilled in the art, and are not described herein, nor should they be construed as a limitation to the disclosure.
  • a method for driving and controlling the above touch panel is also provided.
  • the second electrode may be not only used as a common driving electrode, but also used as a common inductive electrode, accordingly, the following driving control methods may exist.
  • the second electrode is a common inductive electrode:
  • the plurality of first electrodes extending in the first direction are sequentially loaded with first driving signals, and the plurality of second electrodes extending in the second direction are simultaneously loaded with first inductive signals;
  • the plurality of third electrodes extending in the third direction are sequentially loaded with second driving signals, and the plurality of second electrodes extending in the second direction are simultaneously loaded with second inductive signals.
  • each of the first electrodes extending in the first direction is sequentially scanned and driven, and the first driving signal used for touch is loaded during scanning.
  • each of the second electrodes extending in the second direction is loaded with the first inductive signal used for touch.
  • the plurality of first electrodes are respectively connected to different pins.
  • first electrodes are TX 1 to TX 3 respectively connected to touch driving pin 1 to touch driving pin 3 .
  • the number of the first electrodes is more than three, and the disclosure is only an example.
  • second electrodes Rx 2 to Rx 15 correspond to the preset area.
  • a preset number of adjacent second electrodes are connected to a same pin.
  • a width of the second electrodes Rx 2 to Rx 15 is equivalent to a width of the second electrode outside the preset area (for example, Rx 1 ).
  • the second electrodes Rx 2 to Rx 7 are connected to a same touch inductive pin 2
  • the second electrodes Rx 8 to Rx 15 are connected to a same touch inductive pin 3 .
  • Second electrodes corresponding to areas outside the preset area are respectively connected to different pins, i.e., the second electrode Rx 1 is connected to a touch inductive pin 1 and the second electrode Rx 16 is connected to a touch inductive pin 4 .
  • each of the third electrodes extending in the third direction is sequentially scanned and driven, and second driving signals used for fingerprint identification are loaded during scanning, and at the same time, second electrodes located in the preset target area extending in the second direction are simultaneously loaded with second inductive signals for fingerprint identification.
  • first driving signals loaded to first electrodes may be left unprocessed and the scanning state may be maintained.
  • the signals loaded to second electrodes are switched, that is, pins, connected to second electrodes in the preset target area and used for touch, are switched to pins used for fingerprint identification.
  • second electrodes Rx 2 to Rx 7 being connected to the touch inductive pin 2 (shown in FIG.
  • the second electrodes Rx 2 -Rx 7 being respectively connected to a fingerprint identification pin 1 to a fingerprint identification pin 6
  • second electrodes Rx 8 to Rx 15 being connected to the touch inductive pin 3 (shown in FIG. 5( a ) ) are switched to: the second electrodes Rx 8 -Rx 15 being respectively connected to a fingerprint identification pin 7 to a fingerprint identification pin 14 .
  • the plurality of third electrodes are respectively connected to different pins, that is, third electrodes are respectively tx 1 to txn, which are respectively connected to a fingerprint driving pin 1 to a fingerprint driving pin n.
  • the second electrode is a common driving electrode:
  • the plurality of second electrodes extending in the second direction are sequentially loaded with first driving signals, and the plurality of first electrodes extending in the first direction are simultaneously loaded with first inductive signals.
  • a plurality of second electrodes extending in the second direction are sequentially loaded with second driving signals, and a plurality of third electrodes extending in the third direction are simultaneously loaded with second inductive signals.
  • each of the second electrodes extending in the second direction is sequentially scanned and driven, and first driving signals used for touch are loaded during scanning, and at the same time, the first electrodes extending in the first direction are loaded with first inductive signals used for touch simultaneously.
  • the second electrodes Tx 2 to Tx 15 correspond to the preset area, and adjacent second electrodes of the preset number are connected to the same pin.
  • a width of the second electrodes Tx 2 to Tx 7 is equivalent to a width occupied by a second electrode outside the preset area (for example, Tx 1 ).
  • the second electrodes Tx 2 to Tx 7 are connected to the same touch driving pin 2
  • the second electrodes Tx 8 to Tx 15 are connected to the same touch driving pin 3
  • Second electrodes outside the corresponding preset area are respectively connected to different pins, that is, the second electrode Tx 1 is connected to a touch driving pin 1
  • the second electrode Tx 16 is connected to a touch driving pin 4 .
  • a plurality of first electrodes RX 1 to RX 3 extending in the first direction are respectively led to a touch inductive pin 1 to a touch inductive pin 3 .
  • each of the second electrodes extending in the second direction and located in the preset target area are sequentially scanned and driven, and second driving signals used for fingerprint identification are loaded during scanning, and at the same time, third electrodes extending in the third direction are loaded with second inductive signals used for fingerprint identification simultaneously.
  • first inductive signals loaded to second electrodes may be left unprocessed and remain in an input state.
  • signals loaded to second electrodes are switched, that is, pins for touch control connected to second electrodes corresponding to the preset target area are switched to pins for fingerprint identification.
  • second electrodes Tx 2 to Tx 7 being connected to touch driving pins 2 (shown in FIG.
  • second electrodes Tx 2 to Tx 7 being respectively connected to a fingerprint driving pin 1 to a fingerprint driving pin 6
  • second electrodes Tx 8 to Tx 15 being connected touch inductive pins 3 (shown in FIG. 6( a ) ) are switched to: second electrodes Tx 7 to Tx 15 being respectively connected to fingerprint driving pin 7 to fingerprint driving pin 14 .
  • a plurality of third electrodes are respectively connected to different pins, that is, third electrodes are respectively rx 1 to rxn, which are respectively led to a fingerprint inductive pin 1 to a fingerprint inductive pin n.
  • switching of a fingerprint identification circuit and a touch control circuit mentioned above may be implemented by a driving IC, or may be implemented by a TFT switch, and is not limited thereto.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)
  • Computer Hardware Design (AREA)
  • Image Input (AREA)
US16/462,456 2017-12-29 2018-07-25 Touch panels and driving control methods thereof, touch display devices Pending US20210109635A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201711481123.1A CN108089756A (zh) 2017-12-29 2017-12-29 一种触控面板及其驱动控制方法、触控显示装置
CN201711481123.1 2017-12-29
PCT/CN2018/096964 WO2019128209A1 (zh) 2017-12-29 2018-07-25 一种触控面板及其驱动控制方法、触控显示装置

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TWI670634B (zh) 2019-09-01
US20200327297A1 (en) 2020-10-15

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