WO2018161530A1 - 悬浮触控面板、其触控方法及显示装置 - Google Patents

悬浮触控面板、其触控方法及显示装置 Download PDF

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Publication number
WO2018161530A1
WO2018161530A1 PCT/CN2017/102790 CN2017102790W WO2018161530A1 WO 2018161530 A1 WO2018161530 A1 WO 2018161530A1 CN 2017102790 W CN2017102790 W CN 2017102790W WO 2018161530 A1 WO2018161530 A1 WO 2018161530A1
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WIPO (PCT)
Prior art keywords
touch
ultrasonic
sensing unit
touch panel
node
Prior art date
Application number
PCT/CN2017/102790
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English (en)
French (fr)
Inventor
刘英明
董学
王海生
丁小梁
吴俊纬
郑智仁
郭玉珍
韩艳玲
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/757,562 priority Critical patent/US10671218B2/en
Publication of WO2018161530A1 publication Critical patent/WO2018161530A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • 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
    • G06F3/0416—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
    • G06F3/0412—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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • 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
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G06F3/0436—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate
    • 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
    • G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
    • 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
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • 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
    • G06F2203/04108—Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction

Definitions

  • the present disclosure relates to the field of touch technologies, and more particularly to a floating touch panel, a touch method thereof, and a display device.
  • Suspension touch is a new touch method that can realize touch operation without touching the touch screen. When there is a certain distance between the finger and the screen, click and slide operations can be realized on the touch screen.
  • the existing suspension touch is generally realized by an infrared sensor and a capacitive high-sensitivity touch.
  • the infrared sensor emits infrared light when the infrared sensor emits a certain distance between the user's finger and the screen, and the infrared light reflected by the finger is received by the infrared sensor, and the position and specific action of the finger are determined accordingly.
  • the hovering touch when the distance between the finger and the screen is relatively short, since the infrared light propagates at a faster speed, if the infrared sensor cannot respond quickly, the touch action cannot be quickly recognized, and therefore, the response to the infrared sensor is performed. The requirements are higher.
  • Capacitive high-sensitivity touch is achieved by increasing the sensitivity of the capacitive touch, so that the sensing capacitor can recognize the touch action when the finger is not touched by the screen, thereby achieving the hovering touch.
  • the hovering touch method is implemented, the distance between the finger and the screen is required to be close, and therefore, the hovering touch capability is limited.
  • a suspension touch panel provided by the embodiment of the present disclosure includes: a substrate, a modulation light source disposed on the substrate, a plurality of touch circuits arranged in a matrix, and a plurality of first lines corresponding to the touch circuits of each row a touch scan line, a plurality of touch read lines corresponding to the touch circuits of the respective columns;
  • the modulation The light source is configured to emit modulated light to the touch side;
  • the touch circuit includes: a touch module, a reading module, and an output module;
  • the touch module includes an ultrasonic sensing unit and a light sensing unit, wherein the ultrasonic sensing unit is configured to emit ultrasonic waves to the touch side, and convert the ultrasonic waves reflected from the touch side into electrical signals.
  • the light sensing unit is configured to convert modulated light reflected from the touch side into an electrical signal and provide the first node;
  • the reading module is configured to output a touch signal to the output module according to a potential of the first node
  • the output module is configured to provide the received touch signal to the corresponding touch read line under the control of the corresponding first touch scan line.
  • the ultrasonic sensing unit includes: an ultrasonic transmitting portion, an ultrasonic receiving portion, a rectifying diode, and a light shielding layer covering the rectifying diode;
  • An anode of the rectifier diode is connected to the ultrasonic receiving portion, and a cathode of the rectifier diode is connected to the first node.
  • the ultrasonic receiving portion includes a first electrode, a first piezoelectric material layer, and a second electrode which are sequentially disposed on the substrate and are stacked;
  • One of the first electrode and the second electrode is connected to an anode of the rectifier diode, and the other of the first electrode and the second electrode is used to apply a first fixed voltage.
  • all of the touch circuits share one of the ultrasonic transmitting portions
  • the ultrasonic transmitting portion includes a first planar electrode, a second piezoelectric material layer, and a second planar electrode that sequentially cover the substrate; and the first planar electrode and the second planar electrode One of the electrodes is used to apply a second fixed voltage and the other electrode is used to apply an alternating voltage.
  • the light sensing unit includes a photodiode on the substrate facing the touch side; the anode of the photodiode is used to apply a third solid The voltage is constant, and the cathode of the photodiode is connected to the first node.
  • the ultrasonic receiving portion is located on a side of the substrate facing the touch side, and an anode of the photodiode and an ultrasonic receiving portion of the associated touch circuit The two electrodes are connected.
  • the light sensing unit further includes a collecting lens located on the touch side of the photodiode.
  • the substrate further includes a second touch scan line corresponding to each touch circuit of the row; the touch circuit further includes a reset module, wherein the reset The module is configured to reset the potential of the first node under the control of the corresponding second touch scan line.
  • the second touch scan line corresponding to each touch circuit of the row is corresponding to the touch circuit of the previous row.
  • the second touch scan line corresponding to each touch circuit of the row is the corresponding row of the touch circuit of the next row.
  • the first touch scan line is described.
  • the reset module includes a first switching transistor
  • the gate of the first switching transistor is connected to the corresponding second touch scan line, the first pole is for receiving a reset signal, and the second pole is connected to the first node.
  • the reading module includes a driving transistor
  • the gate of the driving transistor is connected to the first node, the first pole is for receiving a reference signal, and the second pole is connected to the output module.
  • the output module includes a second switching transistor
  • a gate of the second switching transistor is connected to a corresponding first touch scan line, and the first pole
  • the reading module is connected, and the second pole is connected to the corresponding touch reading line.
  • the substrate is further provided with pixel units arranged in a matrix; at least part of the pixel units include at least four sub-pixel regions; wherein one of the sub-pixel regions is disposed
  • the touch circuit, the remaining sub-pixel regions are provided with a sub-pixel structure for display.
  • the substrate is defined as a display area and a frame area surrounding the display area;
  • the pixel units arranged in a matrix are located in the display area, and the modulation light source is located in the frame area.
  • the embodiment of the present disclosure further provides a display device, including any of the touch panels provided by the embodiments of the present disclosure.
  • the embodiment of the present disclosure further provides a touch method of the above touch panel, which is used for each frame touch scan:
  • each first touch scan line is scanned line by line, and when it is determined that the touch distance is greater than the preset distance, the ultrasonic wave is turned off, and when the touch distance is determined to be less than or equal to the preset distance
  • the modulated light source is turned off.
  • FIG. 1 is a schematic structural diagram of a suspension touch panel according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a touch circuit according to an embodiment of the present disclosure
  • FIG. 3 is a second schematic structural diagram of a touch circuit according to an embodiment of the present disclosure.
  • FIG. 4 is a third schematic structural diagram of a touch circuit according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of an ultrasonic transmitting portion in a touch circuit according to an embodiment of the present disclosure
  • FIG. 6 is a second schematic structural diagram of a floating touch panel according to an embodiment of the present disclosure.
  • a floating touch panel provided by the embodiment of the present disclosure, as shown in FIG. 1 , includes: a substrate 1 , a modulation light source 2 disposed on the substrate 1 , a plurality of touch circuits 3 arranged in a matrix, and a touch circuit of each row 3 corresponding to the plurality of first touch scan lines scan1 and the plurality of touch read lines readline corresponding to each column of touch circuits 3; the modulated light source 2 is configured to emit modulated light to the touch side;
  • the touch control circuit 3 includes: a touch module 31, a reading module 32, and an output module 33;
  • the touch module 31 includes an ultrasonic sensing unit 311 and a light sensing unit 312.
  • the ultrasonic sensing unit 311 is configured to transmit ultrasonic waves to the touch side, and convert the ultrasonic waves reflected from the touch side into electrical signals to provide the first Node A;
  • the light sensing unit 312 is configured to convert the modulated light reflected from the touch side into an electrical signal and provide it to the first node A;
  • the reading module 32 is configured to output a touch signal to the output module 33 according to the potential of the first node A;
  • the output module 33 is configured to provide the received touch signal to the corresponding touch read line readline under the control of the corresponding first touch scan line scan1.
  • the response speed of the ultrasonic wave sensing unit 311 is not high because the sound wave transmission speed is relatively slow relative to the light speed.
  • the recognition of the touch action can be performed based on the signal fed back by the ultrasonic sensing unit 311.
  • the ultrasonic sensing unit 311 receives the signal delayed, resulting in information delay, and the light propagation speed is faster, so Knowing the touch action according to the signal fed back by the light sensing unit 312 do not.
  • the touch motion can be quickly and accurately recognized whether the proximity touch or the long distance is performed during the hover touch.
  • the working principle of the touch circuit 3 is: when a touch occurs, the touch module 31 in the touch circuit 3 provides the first node A according to the touch.
  • the reading module 32 outputs a touch signal to the output module 33 according to the potential of the first node A; and when scanning a certain first touch scan line scan1, the first touch scan line scan1 controls the output module.
  • the received touch signal is provided to the corresponding touch read line readline, so that the touch action is recognized by the signal outputted on the touch read line readline.
  • one touch circuit 3 may be corresponding to one modulated light source 2, and of course, the plurality of touch circuits 3 may be corresponding to one modulated light source 1 , which is not limited herein.
  • the substrate 1 can also be The second touch scan line scan2 corresponding to each row or column of touch circuits 3 is provided; the touch circuit 3 further includes a reset module 34, wherein the reset module 34 is used for controlling the corresponding second touch scan line scan2
  • the potential of the first node A is reset. In this way, the potential of the first node A can be reset before the first scan touch line scan1 is scanned, thereby improving the accuracy of the touch.
  • the rows and columns are only two directions that intersect each other, for example, a row of touch circuits 3 may be arranged in the row direction, or may be in the column direction. Arranged, there is no limit here.
  • the extending direction of the row of the touch circuit 3 is generally set to the row direction, and the extending direction of the row of the touch circuits 3 is set to the column direction, for example, when the first touch scan line scan1 and the second touch scan When the line scan2 corresponds to one row of the touch circuit 3, the extending directions of the first touch scan line scan1 and the second touch scan line scan2 are both set to the row direction, and the first touch scan line scan1 and the second touch scan line are When the scan2 corresponds to one column of the touch circuit 3, the first touch scan line scan1 and the second touch The extending direction of the scanning line scan2 is set to the column direction.
  • the touch read line readline uses the same setting method and will not be described in detail here.
  • the second touch scan line scan2 corresponding to each row of touch circuits 3 may correspond to the touch line 3 of the previous row.
  • the first touch scan line scan1. This saves on the amount of wiring.
  • the direction of the first touch scan line scan1 and the second touch scan line scan2 is taken as an example.
  • Each of the two rows of touch circuits 3 can be respectively provided with a first touch scan line scan1, and A first touch scan line scan1 is disposed between the adjacent two rows of touch circuits 3.
  • the corresponding first touch scan line scan1 may be the n+1th touch scan line
  • the corresponding second touch scan line scan2 may be the nth touch scan line.
  • the second touch scan line scan2 corresponding to each row of touch circuits 3 may be the next row of touch circuits 3 Corresponding first touch scan line scan1.
  • the direction of the first touch scan line scan1 and the second touch scan line scan2 is taken as an example.
  • Each of the two rows of touch circuits 3 can be respectively provided with a first touch scan line scan1, and A first touch scan line scan1 is disposed between the adjacent two rows of touch circuits 3.
  • the corresponding first touch scan line scan1 may be the nth touch scan line
  • the corresponding second touch scan line scan2 may be the n+1th touch scan line.
  • the second touch scan line scan2 corresponding to each row of touch circuits 3 may also be the first touch scan line corresponding to the other row of touch circuits 3 Scan1 is not limited here.
  • the ultrasonic sensing unit 311 includes: an ultrasonic transmitting portion (not shown in FIG. 4) on the substrate 1, and an ultrasonic receiving portion 02.
  • the rectifier diode 03 and the light shielding layer 06 covering the rectifier diode 03; and the anode of the rectifier diode 03 is connected to the ultrasonic wave receiving portion 02, and the cathode of the rectifier diode 03 is connected to the first node A.
  • the ultrasonic wave emitted from the ultrasonic transmitting portion is reflected back by the touched finger, it is received by the ultrasonic receiving portion 02, and the ultrasonic receiving portion 02 converts the received ultrasonic signal into an electrical signal, and the ultrasonic wave continuously fed back is stronger than the first one.
  • the electrical signal can pass through the rectifier diode 03, thereby accumulating on the first node A.
  • the ultrasonic receiving portion 02 includes a first electrode 021, a first piezoelectric material layer 022, and a first layer which are sequentially disposed on the substrate 1 and are stacked.
  • One of the first electrode 021 and the second electrode 023 is connected to the anode of the rectifier diode 03, and the other of the first electrode 021 and the second electrode 023 is used to apply a first fixed voltage.
  • the first electrode 021 is connected to the anode of the rectifier diode 03, and the second electrode 023 is used to apply the first fixed voltage as an example.
  • the ultrasonic receiving portion 02 is generally located on a side of the substrate 1 facing the touch side, so that the distance between the reflected ultrasonic wave and the ultrasonic receiving portion 02 can be reduced.
  • the ultrasonic receiving 02 can also be located on the side of the substrate 1 facing away from the touch side, which is not limited herein.
  • all the touch circuits share one ultrasonic transmitting portion 01, that is, the ultrasonic waves received by all the ultrasonic receiving portions 02 are from an ultrasonic transmitting portion 01. ;among them,
  • the ultrasonic emitting portion 01 includes a first planar electrode 011, a second piezoelectric material layer 012, and a second planar electrode 013 which are sequentially covered with the substrate 1; and among the first planar electrode 011 and the second planar electrode 013 One electrode is used to apply a second fixed voltage and the other electrode is used to apply an alternating voltage.
  • the second fixed voltage may be the same fixed voltage as the first fixed voltage, or may be a different fixed voltage, which is not limited herein.
  • the ultrasonic transmitting portion 01 may be located on a side of the substrate 1 facing the touch side, or may be located on a side of the substrate 1 facing away from the touch side.
  • the ultrasonic wave emitting portion 01 is disposed on the side of the substrate 1 facing away from the touch side, the electrodes in the ultrasonic wave emitting portion 01 and the other electrodes on the substrate 1 can be prevented from interfering with each other.
  • the first voltage material layer 022 and the second piezoelectric material layer 012 may be the same piezoelectric material or different piezoelectric materials, and may not be used herein. limited.
  • the specific structure of the ultrasonic sensing unit 311 in the touch module 31 is exemplified.
  • the specific structure of the ultrasonic sensing unit 311 is not limited to the above-mentioned structure provided by the embodiment of the present disclosure, and may be known to those skilled in the art. Other structures are not limited here.
  • the light sensing unit 312 includes a photodiode 04 on the substrate 1 facing the touch side; the anode of the photodiode 04 is used for application.
  • the third fixed voltage, the cathode of the photodiode 04 is connected to the first node A.
  • the third fixed voltage may be the same fixed voltage as the first fixed voltage, or may be a different fixed voltage, which is not limited herein.
  • the anode of the photodiode 04 is connected to the second electrode 023 of the ultrasonic receiving portion 02 in the associated touch circuit 3. .
  • the light sensing unit 312 may further include: the photodiode 04 facing the touch Condenser lens 05 on the side.
  • the above is only a specific structure of the light sensing unit 312 in the touch module 31.
  • the specific structure of the light sensing unit 312 is not limited to the above-mentioned structure provided by the embodiments of the present disclosure, and may be known to those skilled in the art. Other structures are not limited here.
  • the reset module 34 specifically includes a first switching transistor T1;
  • the gate of the first switching transistor T1 is connected to the corresponding second touch scan line scan1, the first pole is for receiving the reset signal, and the second pole is connected to the first node A.
  • the reset signal line reset corresponding to each row or column of touch circuits 3 may be further included, and the reset signal line reset is used for the pair.
  • the first switching transistor T1 in the touch circuit 3 should transmit a reset signal.
  • the above is only a specific structure of the reset module 34 in the touch control circuit 3.
  • the specific structure of the reset module 34 is not limited to the above-mentioned structure provided by the embodiments of the present disclosure, and may be other structures known to those skilled in the art. There is no limit here.
  • the reading module 32 specifically includes a driving transistor T0;
  • the gate of the driving transistor T0 is connected to the first node A, the first pole is for receiving the reference signal, and the second pole is connected to the output module 33.
  • the higher the potential accumulated on the first node A the larger the current that the driving transistor outputs to the output module 33, and the potential of the first node A is the ultrasonic sensing unit 311 or the light sensing unit 312 according to the touch gesture. determine.
  • the reference signal line Vdd corresponding to each row or column of touch circuits 3 is used, and the reference signal line Vdd is used for corresponding
  • the driving transistor T0 in the touch circuit 3 transmits a reference signal.
  • the above is only a specific structure of the reading module 32 in the touch control circuit 3.
  • the specific structure of the reading module 32 is not limited to the above-mentioned structure provided by the embodiments of the present disclosure, and may be other known to those skilled in the art. Structure, not limited here.
  • the output module 33 specifically includes a second switching transistor T2;
  • the gate of the second switching transistor T2 is connected to the corresponding first touch scan line scan2, the first pole is connected to the reading module 32, and the second pole is connected to the corresponding touch read line readline.
  • the above is only a specific structure of the output module 33 in the touch control circuit 3.
  • the specific structure of the output module 33 is not limited to the above-mentioned structure provided by the embodiments of the present disclosure, and may be other structures known to those skilled in the art. There is no limit here.
  • the substrate 1 is further provided with pixel units 10 arranged in a matrix; at least part of the pixel units 10 includes at least four sub-pixel regions; The sub-pixel area is provided with a touch circuit 3, and the remaining sub-pixel areas are arranged for the sub-pixel structure for display, and the remaining three sub-pixel areas are used to set the red sub-pixels respectively.
  • Structure R, blue sub-pixel structure B, and green sub-pixel structure G are used to set the red sub-pixels respectively.
  • the sub-pixel region in the pixel unit 10 may also be configured with a white sub-pixel structure or a yellow sub-pixel structure, which is not limited herein.
  • each pixel unit includes at least four sub-pixel regions; one of the sub-pixel regions is provided with one touch circuit, and the remaining sub-pixel regions are disposed. Set the sub-pixel structure for display, which can improve the touch precision.
  • the substrate 1 is defined as a display area 1a and a frame area 1b surrounding the display area;
  • the pixel unit 10 arranged in a matrix is located in the display area 1a, and the modulation light source 2 is located in the frame area 1b.
  • a plurality of modulated light sources 2 may be included, and the plurality of modulated light sources 2 are uniformly distributed in the frame region 1b, and four of FIG. 6 are taken as an example.
  • the four modulated light sources 2 are respectively distributed on the four corners of the frame region 1b.
  • the modulation light source 2 may be an LED modulation light source, which is not limited herein.
  • the light sensor unit when the distance of the floating touch is relatively short, the light sensor unit cannot respond quickly because the light propagation speed is fast, but the ultrasonic wave transmission speed is relatively slow relative to the light speed, and the ultrasonic sensing is performed.
  • the response of the unit is not high, so the touch action can be identified based on the signal fed back by the ultrasonic sensing unit.
  • the transmission speed of the sound wave is slow.
  • the ultrasonic sensing unit receives the signal delayed, resulting in information delay, and the light propagation speed is faster, so the light can be lighted.
  • the signal fed back by the sensing unit recognizes the touch action. In this way, through the combination of the ultrasonic sensing unit and the light sensing unit, the touch motion can be quickly and accurately recognized whether the proximity touch or the long distance is performed during the hover touch.
  • the embodiment of the present disclosure further provides a touch method of the above touch panel, for each frame touch scan:
  • the modulation light source is turned on, and the ultrasonic sensing unit in the touch circuit is controlled to emit ultrasonic waves;
  • each touch scan line is scanned line by line, and when it is determined that the touch distance is greater than the preset distance, the ultrasonic wave is turned off, and when the touch distance is determined to be less than or equal to the preset distance, the modulation is turned off. light source.
  • the modulation light source is turned on, and the ultrasonic sensing unit in the touch circuit is controlled to emit ultrasonic waves.
  • each touch scan line is scanned line by line to determine whether a touch action occurs.
  • the touch distance is determined to be greater than the preset distance
  • the ultrasonic wave is turned off.
  • the touch sensing action is determined according to the light sensing unit. If the touch distance is determined to be less than or equal to the preset distance, the modulated light source is turned off, and the touch motion is determined according to the ultrasonic sensing unit.
  • the first transistor T1 when the second touch scan line scan2 in FIG. 4 is scanned, the first transistor T1 is turned on, and the turned-on first transistor T1 supplies the reset signal on the reset signal line reset to the first node A, the first node A. The potential is reset.
  • the second transistor T2 When the first touch scan line scan1 is scanned in FIG. 4, the second transistor T2 is turned on, and the turned-on second transistor T2 supplies the touch signal outputted by the driving transistor T0 to the touch read line readline.
  • the photodiode 04 has no electrical signal output, and the ultrasonic receiving portion 02 converts the received ultrasonic wave reflected by the finger into an electrical signal. And an electrical signal is supplied to the first node A through the rectifier diode 03, and the potential of the first node A is determined by the distance of the reflected ultrasonic waves.
  • the ultrasonic transmitting portion 01 since the ultrasonic transmitting portion 01 is turned off, the ultrasonic receiving portion 02 has no electrical signal output, and the photodiode 04 converts the received modulated light reflected by the finger into an electrical signal. And providing an electrical signal to the first node A, the potential of the first node A being determined by the distance of the reflected modulated light.
  • both the modulated light source 2 and the ultrasonic transmitting portion 01 are turned on, but the ultrasonic receiving portion 02 and the photodiode 04 have no electrical signal output, and the first node A is in a floating state, the first node The potential of A is still the potential at reset.
  • the touch action can be determined by analyzing the signal on the touch read line readline.
  • an embodiment of the present disclosure further provides a display device, including any of the above-mentioned touch panels provided by the embodiments of the present disclosure.
  • the principle of the display device is similar to that of the foregoing touch panel. Therefore, the implementation of the display device can be referred to the implementation of the touch panel, and the repeated description is omitted.
  • the display device provided by the embodiment of the present disclosure is particularly suitable for a naked-eye 3D display device, and performs a touch operation on a 3D image by a floating touch.
  • the suspension touch panel, the touch control method and the display device thereof include: a substrate, a modulation light source, a touch circuit, a first touch scan line and a touch read line; and the touch circuit includes: touch The module, the reading module and the output module; wherein the touch module comprises an ultrasonic sensing unit and a light sensing unit; the ultrasonic sensing unit is configured to emit ultrasonic waves to the touch side, and convert the ultrasonic waves reflected from the touch side into electricity The signal is provided to the first node; the light sensing unit is configured to convert the modulated light reflected from the touch side into an electrical signal to the first node; and the reading module is configured to output the touch to the output module according to the potential of the first node The output module is configured to provide the received touch signal to the corresponding touch read line under the control of the corresponding first touch scan line.
  • the response to the ultrasonic sensing unit is not high, so the recognition of the touch action can be performed according to the signal fed back by the ultrasonic sensing unit.
  • the sound wave is transmitted at a slower speed.
  • the ultrasonic sensor unit delays the signal and delays the information, and the light travels faster.
  • the signal fed back by the light sensing unit recognizes the touch action. In this way, through the combination of the ultrasonic sensing unit and the light sensing unit, the touch motion can be quickly and accurately recognized whether the proximity touch or the long distance is performed during the hover touch.

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Abstract

一种悬浮触控面板、其触控方法及显示装置，包括基板（1）、调制光源（2）、读取模块（32）、输出模块（22）、超声波传感单元（311）和光传感单元（312）；超声波传感单元（311）用于向触控侧发射超声波，并将从触控侧反射回来的超声波转换为电信号提供给第一节点；光传感单元（312）用于将从触控侧反射回来的调制光转换为电信号提供给第一节点；读取模块（32）用于根据第一节点的电位向输出模块（33）输出触控信号；输出模块（33）用于在对应的第一触控扫描线的控制下将接收的触控信号提供给对应的触控读取线。当发生较近距离的触控时，根据超声波传感单元（311）反馈的信号进行触控动作的识别。当发生较远距离的触控时，根据光传感单元（312）反馈的信号进行触控动作的识别。

Description

悬浮触控面板、其触控方法及显示装置
本申请要求在2017年3月9日提交中国专利局、申请号为201710137969.7、发明名称为“一种悬浮触控面板、其触控方法及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及触控技术领域，尤指一种悬浮触控面板、其触控方法及显示装置。
背景技术
悬浮触控是一种在不接触触摸屏即可实现触控操作的新型触控方式，即在手指与屏幕之间具有一定距离时，就能在触摸屏上实现点击、滑动等操作。
现有的悬浮触控一般通过红外传感器和电容式高灵敏触控实现。其中，红外传感器是在显示时红外传感器发射红外线，在用户的手指与屏幕之间具有一定距离时，被手指反射的红外线被红外传感器接收，并据此判断手指的位置和具体动作。这种悬浮触控的实现方式中，当手指与屏幕距离较近时，由于红外光的传播速度较快，红外传感器如果不能快速响应，导致无法快速识别触控动作，因此，对红外传感器的响应要求较高。
电容式高灵敏触控则是通过增加电容触控的灵敏度，使感应电容能够在手指没有与屏幕触控时就能识别触摸动作，从而实现悬浮触控。但是，这种悬浮触控方式在实现时，会要求手指与屏幕之间的距离较近，因此，其悬浮触控能力有限。
发明内容
本公开实施例提供的一种悬浮触控面板，包括：基板，设置于所述基板上的调制光源、呈矩阵排列的多个触控电路、与各行所述触控电路对应的多条第一触控扫描线、与各列所述触控电路对应的多条触控读取线；所述调制 光源用于向触控侧发射调制光；所述触控电路包括：触控模块、读取模块和输出模块；其中，
所述触控模块包括超声波传感单元和光传感单元；其中，所述超声波传感单元用于向所述触控侧发射超声波，并将从所述触控侧反射回来的超声波转换为电信号提供给第一节点；所述光传感单元用于将从所述触控侧反射回来的调制光转换为电信号提供给所述第一节点；
所述读取模块用于根据所述第一节点的电位向所述输出模块输出触控信号；
所述输出模块用于在对应的所述第一触控扫描线的控制下，将接收的所述触控信号提供给对应的所述触控读取线。
在本公开实施例提供的触控面板中，所述超声波传感单元包括：位于所述基板上的超声波发射部，超声波接收部，整流二极管，以及覆盖所述整流二极管的遮光层；其中，
所述整流二极管的阳极与所述超声波接收部相连，所述整流二极管的阴极与所述第一节点相连。
在本公开实施例提供的触控面板中，所述超声波接收部包括依次位于所述基板上且层叠设置的第一电极、第一压电材料层和第二电极；
所述第一电极与所述第二电极中的其中一个电极与所述整流二极管的阳极相连，所述第一电极与所述第二电极中的另一个电极用于施加第一固定电压。
在本公开实施例提供的触控面板中，所有的所述触控电路共用一个所述超声波发射部；其中，
所述超声波发射部包括位于依次覆盖所述基板的第一面状电极、第二压电材料层和第二面状电极；且所述第一面状电极与所述第二面状电极中的其中一个电极用于施加第二固定电压，另一个电极用于施加交流电压。
在本公开实施例提供的触控面板中，所述光传感单元包括位于所述基板上且面向所述触控侧的光敏二极管；所述光敏二极管的阳极用于施加第三固 定电压，所述光敏二极管的阴极与所述第一节点相连。
在本公开实施例提供的触控面板中，所述超声波接收部位于所述基板面向所述触控侧的一侧，所述光敏二极管的阳极与所属的触控电路中的超声波接收部的第二电极相连。
在本公开实施例提供的触控面板中，所述光传感单元还包括位于所述光敏二极管面向所述触控侧的聚光透镜。
在本公开实施例提供的触控面板中，所述基板上还设置有与各行所述触控电路对应的第二触控扫描线；所述触控电路中还包括复位模块，其中所述复位模块用于在对应的所述第二触控扫描线的控制下，对所述第一节点的电位进行复位。
在本公开实施例提供的触控面板中，除了第一行所述触控电路以外，与各行所述触控电路对应的所述第二触控扫描线为上一行所述触控电路对应的所述第一触控扫描线。
在本公开实施例提供的触控面板中，除了最后一行所述触控电路以外，与各行所述触控电路对应的所述第二触控扫描线为下一行所述触控电路对应的所述第一触控扫描线。
在本公开实施例提供的触控面板中，所述复位模块包括第一开关晶体管；其中，
所述第一开关晶体管的栅极与对应的所述第二触控扫描线相连，第一极用于接收复位信号，第二极与所述第一节点相连。
在本公开实施例提供的触控面板中，所述读取模块包括驱动晶体管；其中，
所述驱动晶体管的栅极与所述第一节点相连，第一极用于接收参考信号，第二极与所述输出模块相连。
在本公开实施例提供的触控面板中，所述输出模块包括第二开关晶体管；其中，
所述第二开关晶体管的栅极与对应的第一触控扫描线相连，第一极与所 述读取模块相连，第二极与对应的触控读取线相连。
在本公开实施例提供的触控面板中，所述基板上还设置有呈矩阵排列的像素单元；至少部分所述像素单元包括至少四个子像素区域；其中一个所述子像素区域设置一个所述触控电路，剩余的所述子像素区域设置用于显示的子像素结构。
在本公开实施例提供的触控面板中，所述基板被限定为显示区域和包围所述显示区域的边框区域；其中，
所述呈矩阵排列的像素单元位于所述显示区域，所述调制光源位于所述边框区域。
本公开实施例还提供了一种显示装置，包括本公开实施例提供的任一种触控面板。
本公开实施例还提供了一种上述触控面板的触控方法，针对每一帧触控扫描：
在每一帧触控扫描之前，开启调制光源，并控制所述触控电路中的超声波传感单元发射超声波；
在进行每一帧触控扫描时，逐行扫描每一条第一触控扫描线，且当确定触控距离大于预设距离时，关闭所述超声波，当确定触控距离小于或等于预设距离时，关闭所述调制光源。
附图说明
图1为本公开实施例提供的悬浮触控面板的结构示意图之一；
图2为本公开实施例提供的触控电路的结构示意图之一；
图3为本公开实施例提供的触控电路的结构示意图之二；
图4为本公开实施例提供的触控电路的结构示意图之三；
图5为本公开实施例提供的触控电路中超声波发射部的结构示意图；
图6为本公开实施例提供的悬浮触控面板的结构示意图之二。
具体实施方式
为了使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开作进一步地详细描述，显然，所描述的实施例仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本公开保护的范围。
附图中各部件的形状和大小不反映真实比例，目的只是示意说明本公开内容。
本公开实施例提供的一种悬浮触控面板，如图1所示，包括：基板1，设置于基板1上的调制光源2、呈矩阵排列的多个触控电路3、与各行触控电路3对应的多条第一触控扫描线scan1、与各列触控电路3对应的多条触控读取线readline；调制光源2用于向触控侧发射调制光；
如图2所示，触控电路3包括：触控模块31、读取模块32和输出模块33；其中，
触控模块31包括超声波传感单元311和光传感单元312；其中，超声波传感单元311用于向触控侧发射超声波，并将从触控侧反射回来的超声波转换为电信号提供给第一节点A；光传感单元312用于将从触控侧反射回来的调制光转换为电信号提供给第一节点A；
读取模块32用于根据第一节点A的电位向输出模块33输出触控信号；
输出模块33用于在对应的第一触控扫描线scan1的控制下，将接收的触控信号提供给对应的触控读取线readline。
具体地，在本公开实施例提供的上述触控面板中，当发生较近距离的悬浮触控时，由于声波的传输速度相对光速比较慢，对超声波传感单元311的响应要求不高，因此可以根据超声波传感单元311反馈的信号进行触控动作的识别。而当发生较远距离的悬浮触控时，由于声波的传输速度较慢，当手势变化较快时，超声波传感单元311接收信号会延迟导致信息延误，而光的传播速度较快，因此可以根据光传感单元312反馈的信号进行触控动作的识 别。这样通过超声波传感单元311和光传感单元312的结合，可以在进行悬浮触控时，不管是近距离还是远距离均能够快速准确的识别触控动作。
具体地，本公开实施例提供的触控面板中，触控电路3的工作原理为：当有触控发生时，触控电路3中的触控模块31会根据触控向第一节点A提供电信号；读取模块32则根据第一节点A的电位向输出模块33输出触控信号；而当扫描到某一条第一触控扫描线scan1时，第一触控扫描线scan1会控制输出模块33将接收的触控信号提供给对应的触控读取线readline，从而通过触控读取线readline上输出的信号进行触控动作的识别。
可选地，在本公开实施例提供的触控面板中，可以是一个触控电路3对应一个调制光源2，当然也可以是多个触控电路3对应一个调制光源1，在此不作限定。
可选地，在本公开实施例提供的触控面板中，以一个触控电路3为例，每扫描一次第一触控扫描线scan1，就需要对触控读取线readline上的信号收集一次，而触控读取线readline上的信号由第一节点A上的信号决定，因此，为了保证第一节点A上的信号不受上一次扫描干扰，如图3所示，基板1上还可以设置有与各行或各列触控电路3对应的第二触控扫描线scan2；触控电路3中还包括复位模块34，其中复位模块34用于在对应的第二触控扫描线scan2的控制下对第一节点A的电位进行复位。这样可以在第一扫描触控线scan1被扫描之前，先将第一节点A的电位进行复位，从而提高触控的准确度。
需要说明的是，在本公开实施例提供的触控面板中，行与列仅是表示相互交叉的两个方向，例如一行触控电路3可以时沿行方向排列的，也可以是沿列方向排列的，在此不作限定。
可选地，一般与一行触控电路3的延伸方向就设置为行方向，与一列触控电路3的延伸方向就设置为列方向，例如当第一触控扫描线scan1与第二触控扫描线scan2均对应一行触控电路3时，第一触控扫描线scan1与第二触控扫描线scan2的延伸方向均设置为行方向，当第一触控扫描线scan1与第二触控扫描线scan2均对应一列触控电路3时，第一触控扫描线scan1与第二触控 扫描线scan2的延伸方向均设置为列方向。同理，触控读取线readline采用相同的设置方法，在此不作详述。
可选地，在本公开实施例提供的触控面板中，除了第一行触控电路3以外，与各行触控电路3对应的第二触控扫描线scan2可以为上一行触控电路3对应的第一触控扫描线scan1。这样可以节省布线数量。具体地，以第一触控扫描线scan1和第二触控扫描线scan2的延伸方向为行方向为例，每一行触控电路3的两侧可以分别设置一条第一触控扫描线scan1，且相邻两行触控电路3之间设置一条第一触控扫描线scan1。针对第n行触控电路3，对应的第一触控扫描线scan1可以为第n+1条触控扫描线，对应的第二触控扫描线scan2可以为第n条触控扫描线。
或者，可选地，在本公开实施例提供的触控面板中，除了最后一行触控电路3以外，与各行触控电路3对应的第二触控扫描线scan2可以为下一行触控电路3对应的第一触控扫描线scan1。这样可以节省布线数量。具体地，以第一触控扫描线scan1和第二触控扫描线scan2的延伸方向为行方向为例，每一行触控电路3的两侧可以分别设置一条第一触控扫描线scan1，且相邻两行触控电路3之间设置一条第一触控扫描线scan1。针对第n行触控电路3，对应的第一触控扫描线scan1可以为第n条触控扫描线，对应的第二触控扫描线scan2可以为第n+1条触控扫描线。
或者，可选地，在本公开实施例提供的触控面板中，与各行触控电路3对应的第二触控扫描线scan2也可以为其他行触控电路3对应的第一触控扫描线scan1，在此不作限定。
下面结合具体实施例，对本公开进行详细说明。需要说明的是，本实施例中是为了更好的解释本公开，但不限制本公开。
可选地，在本公开实施例提供的触控面板中，如图4所示，超声波传感单元311包括：位于基板1上的超声波发射部(图4中未示出)、超声波接收部02，整流二极管03，以及覆盖整流二极管03的遮光层06；且整流二极管03的阳极与超声波接收部02相连，整流二极管03的阴极与第一节点A相连。 这样，当超声波发射部发出的超声波被触控的手指反射回来后，被超声波接收部02接收，并且超声波接收部02将接收的超声波信号转换为电信号，持续反馈回来的超声波只有强于第一个超声波时，电信号才能通过整流二极管03，从而积累在第一节点A上。
可选地，在本公开实施例提供的触控面板中，如图4所示，超声波接收部02包括依次位于基板1上且层叠设置的第一电极021、第一压电材料层022和第二电极023；
第一电极021与第二电极023中的其中一个电极与整流二极管03的阳极相连，第一电极021与第二电极023中的另一个电极用于施加第一固定电压。具体地，图4中是以第一电极021与整流二极管03的阳极相连，第二电极023用于施加第一固定电压为例进行说明。
可选地，在本公开实施例提供的触控面板中，超声波接收部02一般位于基板1面向触控侧的一侧，这样可以缩小反射回来的超声波与超声波接收部02之间距离。当然，超声波接收02也可以位于基板1背离触控侧的一侧，在此不作限定。
可选地，在本公开实施例提供的触控面板中，如图5所示，所有的触控电路共用一个超声波发射部01，即所有超声波接收部02接收的超声波均来自一个超声波发射部01；其中，
超声波发射部01包括位于依次覆盖基板1的第一面状电极011、第二压电材料层012和第二面状电极013；且第一面状电极011与第二面状电极013中的其中一个电极用于施加第二固定电压，另一个电极用于施加交流电压。该第二固定电压可以和第一固定电压为同一固定电压，也可以为不同固定电压，在此不做限定。
可选地，在本公开实施例提供的触控面板中，超声波发射部01可以位于基板1面向触控侧的一侧，也可以位于基板1背离触控侧的一侧。当将超声波发射部01设置在基板1背离触控侧的一侧时，可以避免超声波发射部01中的电极与基板1上的其它电极相互干扰。
可选地，在本公开实施例提供的触控面板中，第一电压材料层022和第二压电材料层012可以采用相同的压电材料，也可以采用不同的压电材料，在此不作限定。
以上仅是举例说明触控模块31中超声波传感单元311的具体结构，可选地，超声波传感单元311的具体结构不限于本公开实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
可选地，在本公开实施例提供的触控面板中，如图4所示，光传感单元312包括位于基板1上且面向触控侧的光敏二极管04；光敏二极管04的阳极用于施加第三固定电压，光敏二极管04的阴极与第一节点A相连。这样，当调制光源2发出的调制光被触控的手指反射至光敏二极管04时，光敏二极管04将光转化为电信号存储在第一节点A上。该第三固定电压可以和第一固定电压为同一固定电压，也可以为不同固定电压，在此不做限定。
可选地，在本公开实施例提供的触控面板中，为了简化电路，如图4所示，光敏二极管04的阳极与所属的触控电路3中的超声波接收部02的第二电极023相连。
可选地，在本公开实施例提供的触控面板中，为了更好的收集手指反射回来的调制光，如图4所示，光传感单元312还可以包括：位于光敏二极管04面向触控侧的聚光透镜05。
以上仅是举例说明触控模块31中光传感单元312的具体结构，可选地，光传感单元312的具体结构不限于本公开实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
可选地，在本公开实施例提供的触控面板中，如图4所示，复位模块34具体包括第一开关晶体管T1；其中，
第一开关晶体管T1的栅极与对应的第二触控扫描线scan1相连，第一极用于接收复位信号，第二极与第一节点A相连。
可选地，在本公开实施例提供的触控面板中，如图4所示，还可以包括：与各行或各列触控电路3对应的复位信号线reset，复位信号线reset用于向对 应的触控电路3中的第一开关晶体管T1传输复位信号。
以上仅是举例说明触控电路3中复位模块34的具体结构，可选地，复位模块34的具体结构不限于本公开实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
可选地，在本公开实施例提供的触控面板中，如图4所示，读取模块32具体包括驱动晶体管T0；其中，
驱动晶体管T0的栅极与第一节点A相连，第一极用于接收参考信号，第二极与输出模块33相连。这样，当第一节点A上积累的电位越高，驱动晶体管输出给输出模块33的电流越大，而第一节点A的电位正是超声波传感单元311或光传感单元312根据触控手势确定。
可选地，在本公开实施例提供的触控面板中，如图4所示，还包括：与各行或各列触控电路3对应的参考信号线Vdd，参考信号线Vdd用于向对应的触控电路3中的驱动晶体管T0传输参考信号。
以上仅是举例说明触控电路3中读取模块32的具体结构，可选地，读取模块32的具体结构不限于本公开实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
可选地，在本公开实施例提供的触控面板中，如图4所示，输出模块33具体包括第二开关晶体管T2；其中，
第二开关晶体管T2的栅极与对应的第一触控扫描线scan2相连，第一极与读取模块32相连，第二极与对应的触控读取线readline相连。
以上仅是举例说明触控电路3中输出模块33的具体结构，可选地，输出模块33的具体结构不限于本公开实施例提供的上述结构，还可以是本领域技术人员可知的其他结构，在此不做限定。
可选地，在本公开实施例提供的触控面板中，如图6所示，基板1上还设置有呈矩阵排列的像素单元10；至少部分像素单元10包括至少四个子像素区域；其中一个子像素区域设置一个触控电路3，剩余的子像素区域设置用于显示的子像素结构，如图6中剩余三个子像素区域分别用于设置红色子像素 结构R、蓝色子像素结构B和绿色子像素结构G。
当然，可选地，像素单元10中的子像素区域还可以设置白色子像素结构或黄色子像素结构，在此不作限定。
可选地，在本公开实施例提供的触控面板中，如图6所示，每一像素单元均包括至少四个子像素区域；其中一个子像素区域设置一个触控电路，剩余的子像素区域设置用于显示的子像素结构，这样可以提高触控精度。
可选地，在本公开实施例提供的触控面板中，如图6所示，基板1被限定为显示区域1a和包围显示区域的边框区域1b；其中，
呈矩阵排列的像素单元10位于显示区域1a，调制光源2位于边框区域1b。
可选地，在本公开实施例提供的触控面板中，如图6所示，可以包括多个调制光源2，多个调制光源2均匀分布在边框区域1b，图6中以4个为例，4个调制光源2分别分布于边框区域1b的4个角上。
可选地，在本公开实施例提供的触控面板中，调制光源2可以为LED调制光源，在此不作限定。
本公开实施例提供的触控面板，当悬浮触控的距离较近时，由于光的传播速度较快，光传感器单元不能快速响应，但是由于声波的传输速度相对光速比较慢，对超声波传感单元的响应要求不高，因此可以根据超声波传感单元反馈的信号进行触控动作的识别。而当悬浮触控的距离较远时，由于声波的传输速度较慢，当手势变化较快时，超声波传感单元接收信号会延迟导致信息延误，而光的传播速度较快，因此可以根据光传感单元反馈的信号进行触控动作的识别。这样通过超声波传感单元和光传感单元的结合，可以在进行悬浮触控时，不管是近距离还是远距离均能够快速准确的识别触控动作。
基于同一发明构思，本公开实施例还提供了一种上述触控面板的触控方法，针对每一帧触控扫描：
在每一帧触控扫描之前，开启调制光源，并控制触控电路中的超声波传感单元发射超声波；
在进行每一帧触控扫描时，逐行扫描每一条触控扫描线，且当确定触控距离大于预设距离时，关闭超声波，当确定触控距离小于或等于预设距离时，关闭调制光源。
下面结合图4所示的触控电路，对本公开实施例提供的触控面板的触控方法进行说明。
在每一帧触控扫描之前，开启调制光源，并控制触控电路中的超声波传感单元发射超声波。在进行每一帧触控扫描时，逐行扫描每一条触控扫描线，确定是否有触控动作发生，当确定由触控动作发生时，如果确定触控距离大于预设距离，则关闭超声波，根据光传感单元判断触控动作，如果确定触控距离小于或等于预设距离，则关闭调制光源，根据超声波传感单元判断触控动作。
例如，当扫描图4中第二触控扫描线scan2时，第一晶体管T1导通，导通的第一晶体管T1将复位信号线reset上的复位信号提供给第一节点A，第一节点A的电位被复位。当扫描图4中第一触控扫描线scan1时，第二晶体管T2导通，导通的第二晶体管T2将驱动晶体管T0输出的触控信号提供给触控读取线readline。
1、如果此时判断触控距离小于或等于预设距离，由于调制光源2是关闭的，光敏二极管04无电信号输出，而超声波接收部02将接收的由手指反射回来的超声波转换为电信号，并将电信号通过整流二极管03提供到第一节点A上，第一节点A的电位由反射的超声波的距离决定。
2、如果此时判断触控距离大于预设距离，由于超声波发射部01是关闭的，超声波接收部02无电信号输出，而光敏二极管04将接收的由手指反射回来的调制光转换为电信号，并将电信号提供给第一节点A，第一节点A的电位由反射的调制光的距离决定。
3、如果此时判断无触控发生，调制光源2和超声波发射部01都是开启的，但是超声波接收部02和光敏二极管04均无电信号输出，第一节点A处于悬浮状态，第一节点A的电位仍为复位时的电位。
由于驱动晶体管T0输出的触控信号由第一节点A的电位决定，因此通过分析触控读取线readline上的信号可以确定触控动作。
基于同一发明构思，本公开实施例还提供了一种显示装置，包括本公开实施例提供的上述任一种触控面板。由于该显示装置解决问题的原理与前述一种触控面板相似，因此该显示装置的实施可以参见前述触控面板的实施，重复之处不再赘述。
本公开实施例提供的显示装置，尤为适用于裸眼3D显示装置，通过悬浮触控对3D图像进行触控操作。
本公开实施例提供的悬浮触控面板、其触控方法及显示装置，包括：基板、调制光源、触控电路、第一触控扫描线和触控读取线；触控电路包括：触控模块、读取模块和输出模块；其中，触控模块包括超声波传感单元和光传感单元；超声波传感单元用于向触控侧发射超声波，并将从触控侧反射回来的超声波转换为电信号提供给第一节点；光传感单元用于将从触控侧反射回来的调制光转换为电信号提供给第一节点；读取模块用于根据第一节点的电位向输出模块输出触控信号；输出模块用于在对应的第一触控扫描线的控制下将接收的触控信号提供给对应的触控读取线。这样，当发生较近距离的悬浮触控时，由于声波的传输速度相对光速比较慢，对超声波传感单元的响应要求不高，因此可以根据超声波传感单元反馈的信号进行触控动作的识别。而当发生较远距离的悬浮触控时，由于声波的传输速度较慢，当手势变化较快时，超声波传感单元接收信号会延迟导致信息延误，而光的传播速度较快，因此可以根据光传感单元反馈的信号进行触控动作的识别。这样通过超声波传感单元和光传感单元的结合，可以在进行悬浮触控时，不管是近距离还是远距离均能够快速准确的识别触控动作。
显然，本领域的技术人员可以对本公开实施例进行各种改动和变型而不脱离本公开实施例的精神和范围。这样，倘若本公开实施例的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (17)

  1. 一种悬浮触控面板，其特征在于，包括：基板，设置于所述基板上的调制光源、呈矩阵排列的多个触控电路、与各行所述触控电路对应的多条第一触控扫描线、与各列所述触控电路对应的多条触控读取线；所述调制光源用于向触控侧发射调制光；所述触控电路包括：触控模块、读取模块和输出模块；其中，
    所述触控模块包括超声波传感单元和光传感单元；其中，所述超声波传感单元用于向所述触控侧发射超声波，并将从所述触控侧反射回来的超声波转换为电信号提供给第一节点；所述光传感单元用于将从所述触控侧反射回来的调制光转换为电信号提供给所述第一节点；
    所述读取模块用于根据所述第一节点的电位向所述输出模块输出触控信号；
    所述输出模块用于在对应的所述第一触控扫描线的控制下，将接收的所述触控信号提供给对应的所述触控读取线。
  2. 如权利要求1所述的触控面板，其特征在于，所述超声波传感单元包括：位于所述基板上的超声波发射部，超声波接收部，整流二极管，以及覆盖所述整流二极管的遮光层；其中，
    所述整流二极管的阳极与所述超声波接收部相连，所述整流二极管的阴极与所述第一节点相连。
  3. 如权利要求2所述的触控面板，其特征在于，所述超声波接收部包括依次位于所述基板上且层叠设置的第一电极、第一压电材料层和第二电极；
    所述第一电极与所述第二电极中的其中一个电极与所述整流二极管的阳极相连，所述第一电极与所述第二电极中的另一个电极用于施加第一固定电压。
  4. 如权利要求2所述的触控面板，其特征在于，所有的所述触控电路共用一个所述超声波发射部；其中，
    所述超声波发射部包括位于依次覆盖所述基板的第一面状电极、第二压电材料层和第二面状电极；且所述第一面状电极与所述第二面状电极中的其中一个电极用于施加第二固定电压，另一个电极用于施加交流电压。
  5. 如权利要求3所述的触控面板，其特征在于，所述光传感单元包括位于所述基板上且面向所述触控侧的光敏二极管；所述光敏二极管的阳极用于施加第三固定电压，所述光敏二极管的阴极与所述第一节点相连。
  6. 如权利要求5所述的触控面板，其特征在于，所述超声波接收部位于所述基板面向所述触控侧的一侧，所述光敏二极管的阳极与所属的触控电路中的超声波接收部的第二电极相连。
  7. 如权利要求5所述的触控面板，其特征在于，所述光传感单元还包括位于所述光敏二极管面向所述触控侧的聚光透镜。
  8. 如权利要求1-7任一项所述的触控面板，其特征在于，所述基板上还设置有与各行所述触控电路对应的第二触控扫描线；所述触控电路中还包括复位模块，其中所述复位模块用于在对应的所述第二触控扫描线的控制下，对所述第一节点的电位进行复位。
  9. 如权利要求8所述的触控面板，其特征在于，除了第一行所述触控电路以外，与各行所述触控电路对应的所述第二触控扫描线为上一行所述触控电路对应的所述第一触控扫描线。
  10. 如权利要求8所述的触控面板，其特征在于，除了最后一行所述触控电路以外，与各行所述触控电路对应的所述第二触控扫描线为下一行所述触控电路对应的所述第一触控扫描线。
  11. 如权利要求8所述的触控面板，其特征在于，所述复位模块包括第一开关晶体管；其中，
    所述第一开关晶体管的栅极与对应的所述第二触控扫描线相连，第一极用于接收复位信号，第二极与所述第一节点相连。
  12. 如权利要求1-7任一项所述的触控面板，其特征在于，所述读取模块包括驱动晶体管；其中，
    所述驱动晶体管的栅极与所述第一节点相连，第一极用于接收参考信号，第二极与所述输出模块相连。
  13. 如权利要求1-7任一项所述的触控面板，其特征在于，所述输出模块包括第二开关晶体管；其中，
    所述第二开关晶体管的栅极与对应的第一触控扫描线相连，第一极与所述读取模块相连，第二极与对应的触控读取线相连。
  14. 如权利要求1-3、5-7任一项所述的触控面板，其特征在于，所述基板上还设置有呈矩阵排列的像素单元；至少部分所述像素单元包括至少四个子像素区域；其中一个所述子像素区域设置一个所述触控电路，剩余的所述子像素区域设置用于显示的子像素结构。
  15. 如权利要求14所述的触控面板，其特征在于，所述基板被限定为显示区域和包围所述显示区域的边框区域；其中，
    所述呈矩阵排列的像素单元位于所述显示区域，所述调制光源位于所述边框区域。
  16. 一种显示装置，其特征在于，包括如权利要求1-15任一项所述的触控面板。
  17. 一种如权利要求1-15任一项所述的触控面板的触控方法，其特征在于，针对每一帧触控扫描：
    在所述每一帧触控扫描之前，开启调制光源，并控制所述触控电路中的超声波传感单元发射超声波；
    在进行每一帧触控扫描时，逐行扫描每一条第一触控扫描线，且当确定触控距离大于预设距离时，关闭所述超声波，当确定触控距离小于或等于预设距离时，关闭所述调制光源。
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