WO2022073281A1 - 触控面板 - Google Patents

触控面板 Download PDF

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Publication number
WO2022073281A1
WO2022073281A1 PCT/CN2020/129449 CN2020129449W WO2022073281A1 WO 2022073281 A1 WO2022073281 A1 WO 2022073281A1 CN 2020129449 W CN2020129449 W CN 2020129449W WO 2022073281 A1 WO2022073281 A1 WO 2022073281A1
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WO
WIPO (PCT)
Prior art keywords
touch panel
signal
lines
line
electrode
Prior art date
Application number
PCT/CN2020/129449
Other languages
English (en)
French (fr)
Inventor
查宝
Original Assignee
深圳市华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US17/252,490 priority Critical patent/US11635842B2/en
Publication of WO2022073281A1 publication Critical patent/WO2022073281A1/zh

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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
    • G06F3/0416—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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—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
    • G06F3/044—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
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • 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

Definitions

  • the present invention relates to the technical field of touch display, and in particular, to a touch panel.
  • Existing touch panels usually use a light control sensor and a touch sensor to function independently, or use different ICs to control the two sensors respectively, which is difficult to integrate into the same panel without adding a film layer.
  • the existing touch panel has the technical problem that it is difficult to integrate the photosensitive circuit and the touch circuit in the same panel.
  • Embodiments of the present invention provide a liquid crystal display panel, which can alleviate the technical problem of the existing touch panel that the photosensitive circuit and the touch circuit are difficult to integrate in the same panel without adding additional film layers.
  • An embodiment of the present invention provides a touch panel, which includes a plurality of light sensing areas arranged in an array, and the touch panel includes:
  • a light-sensing circuit is arranged in the light-sensing area, and the light-sensing circuit includes a light-sensing transistor, and the light-sensing transistor includes a substrate, a gate, a gate insulating layer, an active layer, and a source and drain layer.
  • Phototransistors are used to convert optical signals into electrical signals;
  • a touch control circuit comprising signal emitting electrodes arranged along the first direction and signal receiving electrodes arranged along the second direction;
  • the light-sensing circuit includes a reading line arranged along the second direction, the signal transmitting line is arranged in the same layer as the scanning line and the gate, and the signal receiving line and the reading line are arranged in the same layer.
  • the wiring and the source and drain layers are arranged in the same layer.
  • the photosensitive circuit further includes a switch transistor, the gate of the photosensitive transistor is connected to the low potential electrode of the power supply, and the first electrode of the photosensitive transistor is connected to the high potential of the power supply
  • the second electrode of the photosensitive transistor is connected to the first electrode of the first switch transistor, the gate of the switch transistor is connected to the scan line, and the second electrode of the switch transistor is connected to the scan line.
  • the photosensitive circuit further includes a storage capacitor, the storage capacitor includes a first end and a second end, and the first end is connected to the second electrode of the photosensitive transistor. It is connected with the first electrode of the switching transistor, and the second end is connected with the low potential electrode of the power supply.
  • the photosensitive circuit further includes a first position detection circuit, and the first position detection circuit is connected to the readout line.
  • the photosensitive circuit further includes a second position detection circuit, and the second position detection circuit is connected to the signal receiving wire.
  • the storage capacitance between the signal transmitting line and the signal receiving line will change, which is essentially that the charge of the storage capacitor changes. , the change of the capacitance is transmitted through the signal, and the signal can detect the position of the touch through the second position detection circuit.
  • a projection of the readout line and the signal emission line on the substrate has a first overlapping area, and the scan line and the signal reception line The projection on the substrate has a second overlapping area.
  • the number of the scan lines and the number of the signal emission lines is the same.
  • the scan lines and the signal emission lines are arranged at intervals.
  • the numbers of the scan lines and the signal emission lines are different.
  • a set of scan lines and a set of signal emission lines are arranged at intervals.
  • the scan line set includes more than two scan lines
  • the signal emission line set includes more than two signal emission lines
  • the number of traces in the scan line set is different from the number of traces in the signal emission trace set.
  • the number of traces in the scan line set is the same as the number of traces in the signal emission trace set.
  • the signal emission line emits a first signal during a first period
  • the scan line emits a second signal during a third period
  • the first period and the third period are between the first and third periods.
  • both the signal emission line and the scan line are connected with periodic voltages.
  • the second time period needs to be greater than or equal to the time for data collection of one line of signal receiving lines in the signal transmitting lines.
  • the time length of the second time period is greater than the time length of the first time period.
  • the time length of the fourth time period is greater than the time length of the third time period.
  • Embodiments of the present invention provide a display device including the touch panel of claims 1 to 19.
  • the touch panel provided by the embodiment of the present invention includes a plurality of light sensing areas arranged in an array, the touch panel includes a plurality of scanning lines, a plurality of data lines, a light sensing circuit, and a touch circuit, and the scanning lines are along the first direction, the data lines are arranged along the second direction, the touch control circuit includes a signal emitting electrode arranged along the first direction and a signal receiving electrode arranged along the second direction, wherein the photosensitive circuit includes a signal receiving electrode arranged along the second direction
  • the read lines arranged in the second direction, the signal emission lines are arranged in the same layer as the scan lines and the gate, and the signal reception lines are arranged with the read lines and the source and drain layers.
  • the touch circuit and the light-sensing circuit are integrated in the same touch panel.
  • FIG. 1 is a schematic cross-sectional view of a touch panel according to an embodiment of the present invention
  • FIG. 2 is a schematic cross-sectional view of a display device provided by an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a simplified circuit integrated with a light control and a touch sensor provided by an embodiment of the present invention
  • FIG. 4 is a potential timing diagram of a signal transmission line provided by an embodiment of the present invention.
  • FIG. 5 is a potential timing diagram of a scan line according to an embodiment of the present invention.
  • FIG. 6 is a potential timing diagram of time division of signal emission lines and scan lines according to an embodiment of the present invention.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as “first”, “second” may expressly or implicitly include one or more of said features. In the description of the present invention, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • a touch panel provided by an embodiment of the present invention includes a plurality of light sensing areas 1 arranged in an array, and the touch panel includes a plurality of scan lines 10 arranged along a first direction, and a plurality of scan lines 10 arranged along a second direction.
  • the signal receiving electrode wherein the photosensitive circuit includes a reading trace 50 arranged along the second direction, the signal emission trace 30 is arranged in the same layer as the scan line 10 and the gate 202, and the The signal receiving wires 40 are arranged in the same layer as the read wires 50 and the source and drain layers 205 .
  • the touch panel includes a plurality of light sensing areas arranged in an array, and the touch panel includes a plurality of scan lines 10 arranged along the first direction, a plurality of data lines arranged along the second direction, and a plurality of light sensing areas.
  • Circuit, touch circuit, the light-sensing circuit is arranged in the light-sensing area, and the light-sensing transistor 20 includes a substrate 201 , a gate 202 , a gate insulating layer 203 , an active layer 204 , and a source and drain layer 205 , the phototransistor 20 is used to convert the optical signal into an electrical signal, and the touch control circuit includes a signal emitting electrode arranged along the first direction and a signal receiving electrode arranged along the second direction, wherein the light
  • the sensing circuit includes a read trace 50 arranged along the second direction, the signal transmission trace 30 is set on the same layer as the scan line 10 and the gate 202, and the signal reception trace 40 and the read
  • the wiring 50 and the source and drain layers 205 are arranged in the same layer; by arranging the signal transmitting wiring 30 in the same layer as the scanning line 10 and the gate 202, the signal receiving wiring 40 and the The data lines and the readout lines 50 are arranged in the same layer, so that
  • the phototransistor 20 further includes a passivation layer 206 , a flat layer 207 , a first optical adhesive layer 208 , a cover plate 209 , and a black matrix layer 210 disposed above the source and drain layers 205 .
  • the photosensitive circuit further includes a switch transistor 60, the gate 202 of the phototransistor 20 is connected to the low potential electrode of the power supply, and the first electrode of the photosensitive transistor 20 is connected to the high potential electrode of the power supply connected, the second electrode of the photosensitive transistor 20 is connected to the first electrode of the first switching transistor 60, the gate 202 of the switching transistor 60 is connected to the scan line 10, and the first electrode of the switching transistor 60 is connected to the scanning line 10.
  • the two electrodes are connected to the read traces 50 .
  • the photosensitive circuit further includes a storage capacitor 70 , the storage capacitor 70 includes a first end and a second end, the first end is connected to the second electrode of the photosensitive transistor 20 and all the The first electrode of the switching transistor 60 is connected, and the second end is connected to the low-potential electrode of the power supply.
  • the light sensing circuit further includes a first position detection circuit 801 , and the first position detection circuit 801 is connected to the readout line 50 .
  • the projections of the reading traces 50 and the signal transmitting traces 30 on the substrate 201 have a first overlapping area, and the scanning traces 10 and the signal receiving traces are in The projection on the substrate 201 has a second overlapping area.
  • the scan lines 10 and the signal emission lines 30 have the same number.
  • the scan lines 10 and the signal emission traces 30 are arranged at intervals.
  • the number of the scan lines 10 and the signal transmission lines 30 is different.
  • a set of scan lines 10 and a set of signal transmission lines 30 are arranged at intervals.
  • the set of scan lines 10 may include two adjacently arranged scan lines 10
  • the set of signal emission lines 30 may include two adjacently arranged signal transmission lines 30 .
  • the set of scan lines 10 may include three adjacently arranged scan lines 10
  • the set of signal emission lines 30 may include three adjacently arranged signal transmission lines 30 .
  • the set of scan lines 10 may further include three adjacently arranged scan lines 10
  • the set of signal emission lines 30 may further include three adjacently arranged signal transmission lines 30 .
  • a set of scan lines 10 and a set of signal emission lines 30 are arranged at intervals, wherein the number of lines in the set of scan lines 10 and the number of lines in the set of signal emission lines 30 are different .
  • the signal emission line 30 emits a first signal in a first period
  • the scan line 10 emits a second signal in a third period
  • the first period and the first period There is a second time period between the three time periods, and a fourth time period is spaced between the third time period and the next first time period.
  • the second period needs to be greater than or equal to the time for data collection of a row of signal receiving wires 40 in the signal transmitting wires 30 .
  • the fourth period must be greater than or equal to the time for data collection of the photosensitive circuit.
  • the time length of the second time period is greater than the time length of the first time period.
  • the time length of the fourth time period is greater than the time length of the third time period.
  • the display device provided by the embodiment of the present invention includes a touch panel and a display panel 2 , and the touch panel and the display panel 2 are bonded together by a second optical adhesive layer 211 .
  • the display panel 2 may be a liquid crystal display panel 2, an OLED (Organic Any of Light-Emitting Diode, Organic Light Emitting Diode), QLED (Quantum Dot Light Emitting Diodes, Quantum Dot Light Emitting Diode), Mini-LED, Micro-LED.
  • OLED Organic Any of Light-Emitting Diode, Organic Light Emitting Diode
  • QLED Quantum Dot Light Emitting Diodes, Quantum Dot Light Emitting Diode
  • Mini-LED Micro-LED.
  • the photosensitive circuit further includes a switch transistor 60 , the gate 202 of the photosensitive transistor 20 is connected to the low-potential electrode of the power supply, and the first electrode of the photosensitive transistor 20 is connected to the high potential electrode of the power supply, the second electrode of the photosensitive transistor 20 is connected to the first electrode of the first switch transistor 60, the gate 202 of the switch transistor 60 is connected to the scan line 10, and the The second electrode of the switch transistor 60 is connected to the read trace 50 .
  • the photosensitive circuit further includes a storage capacitor 70 , the storage capacitor 70 includes a first end and a second end, and the first end is connected to the photosensitive transistor 20 .
  • the second electrode is connected to the first electrode of the switching transistor 60, and the second end is connected to the low-potential electrode of the power supply.
  • the photosensitive circuit further includes a first position detection circuit 801 , and the first position detection circuit 801 is connected to the read trace 50 .
  • the projection of the readout trace 50 and the signal emission trace 30 on the substrate 201 has a first overlapping area
  • the scan line 10 and the The projection of the signal receiving traces on the substrate 201 has a second overlapping area.
  • the number of the scan lines 10 and the number of the signal emission lines 30 is the same.
  • the scan lines 10 and the signal emission lines 30 are arranged at intervals.
  • the numbers of the scan lines 10 and the signal emission lines 30 are different.
  • a set of scan lines 10 and a set of signal emission lines 30 are arranged at intervals.
  • the set of scan lines 10 may include two adjacently arranged scan lines 10
  • the set of signal emission lines 30 may include two adjacently arranged signal transmission lines 30 .
  • the set of scan lines 10 may include three adjacently arranged scan lines 10
  • the set of signal emission lines 30 may include three adjacently arranged signal transmission lines 30 .
  • the set of scan lines 10 may further include three adjacently arranged scan lines 10
  • the set of signal emission lines 30 may further include three adjacently arranged signal transmission lines 30 .
  • a set of scan lines 10 and a set of signal emission lines 30 are arranged at intervals, wherein the number of lines in the set of scan lines 10 and the set of signal emission lines 30 are The number of traces varies.
  • the signal emission line 30 emits a first signal in a first period
  • the scan line 10 emits a second signal in a third period
  • the first signal is emitted.
  • a second time period is spaced between the time period and the third time period
  • a fourth time period is spaced between the third time period and the next first time period.
  • the second period needs to be greater than or equal to the time for data collection of a row of signal receiving wires 40 in the signal transmitting wires 30 .
  • the fourth period must be greater than or equal to the time for data collection of the photosensitive circuit.
  • the time length of the second time period is greater than the time length of the first time period.
  • the time length of the fourth period is greater than the time length of the third period.
  • the photosensitive circuit mainly consists of two thin film transistors and a storage capacitor 70 , the two thin film transistors include a photosensitive transistor 20 and a switching transistor 60 .
  • both the semiconductor material and the photosensitive semiconductor material are hydrogenated amorphous silicon.
  • the working principle of the light-sensing circuit when stimulated by light, the amorphous silicon in the photo-sensing transistor 20 will generate carriers, and the carriers are collected by the storage capacitor 70 and controlled by the light-on transistor, and the signal passes through the The first position detection circuit 801 .
  • the touch circuit includes a plurality of electrodes in a first direction and a plurality of electrodes in a second direction.
  • the electrode arrangement in the first direction forms the signal emission trace 30 .
  • the electrode arrangement in the second direction forms a signal receiving trace 40 .
  • the working principle of the touch sensor when stimulated by a finger touch, the projected capacitance between the signal transmitting trace 30 and the signal receiving trace 40 will change, which is essentially the change in the charge of the projected capacitor. changes, the signal passes through the second position detection circuit 802 to detect the position of the touch.
  • FIG. 3 it is a simplified circuit diagram of the integration of the light-sensing circuit and the touch circuit, in which readout line is a readout line, which is set in the same second direction as the signal receiving line 40.
  • the touch panel receives a touch or light control signal, the generated charge changes can be transmitted through the readout line, and the The position detection circuit is amplified and processed, so that the coordinate position of the signal (light control/touch) stimulation point can be accurately located.
  • the signal emitting trace 30 of the touch circuit and the gate electrode 202 of the photosensitive circuit, the low-level electrode 902 of the power supply, and the scan line 10 are arranged in the same layer, which is the gate layer; the signal of the touch circuit
  • the receiving wiring 40 and the power high-level electrode 901 of the photosensitive circuit, the readout wiring, and the data line are arranged in the same layer, and are the source and drain layers 205 .
  • the functions of the signal receiving trace 40 and the readout trace are sensing signals, and their electrical signal states are not fixed.
  • the power supply low level electrode 902 and the power supply high level electrode 901 are the electrodes of the phototransistor 20, which are fixed voltages.
  • the electrodes of the signal emission traces 30 and the scan lines 10 are periodic voltages.
  • a first cross-overlap coupling area S1 exists between the readout wiring of the photosensitive circuit and the signal emission wiring 30 of the touch control circuit.
  • a second cross-overlap coupling region S2 exists between the signal receiving trace 40 and the scan line 10 .
  • the signal transmitting traces 30 and the scanning traces 10 have the same number, and are arranged and distributed crosswise with the signal receiving traces 40 and the readout traces.
  • the row time division method can be used.
  • the time-sharing method in which the scan lines 10 are cross-scanned can cross the touch circuit and the light-sensing circuit in a row-time-sharing method, which effectively solves the problem of crosstalk between the touch circuit and the light-sensing circuit.
  • the reason for the crosstalk between the touch circuit and the photosensitive circuit is that the readout trace of the photosensitive circuit and the signal emission trace 30 of the touch circuit have a first cross-overlap coupling region S1, and the signal reception trace 40 and the scan line 10 exist
  • the second cross-overlap coupling region S2 the first cross-overlap coupling region S1 and the second cross-overlap coupling region S2 make the touch circuit and the photosensitive circuit generate signal crosstalk with each other.
  • the timing diagram of scanning the signal transmission line 30 and the scanning line 10 in a line time division method, using the time division frequency f 1/(t1+t2 '+t3+t4') the scan time of the signal emission line 30 is the first period, the scan time of the scan line 10 is the third period,
  • the period T of one cycle is t1+t2'+t3+t4'.
  • the interval time in the middle is (t2'+t4').
  • the second period needs to be greater than or equal to the time for data collection of a row of signal receiving wires 40 in the signal transmitting wires 30 .
  • the fourth period must be greater than or equal to the time for data collection of the photosensitive circuit.
  • t1 is the first time period
  • t2' is the second time period
  • t3 is the third time period
  • t4' is the fourth time period.
  • the touch panel provided by the embodiment of the present invention includes a plurality of light sensing areas arranged in an array, and the touch panel includes a plurality of scan lines arranged along a first direction, a plurality of data lines arranged along a second direction, and a light sensing circuit , a touch circuit, the light-sensing circuit is arranged in the light-sensing area, and the light-sensing transistor includes a substrate, a gate, a gate insulating layer, an active layer, and a source and drain layer.
  • the touch control circuit includes a signal emitting electrode arranged along the first direction and a signal receiving electrode arranged along the second direction, wherein the light sensing circuit includes a signal receiving electrode arranged along the second direction
  • the read wiring, the signal emission wiring is arranged on the same layer as the scan line and the gate, and the signal receiving wiring is arranged on the same layer as the reading wiring and the source and drain layers;

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触控面板，该触控面板包括光感电路和触控电路，光感电路包括沿第二方向设置的读取走线（50），触控电路包括沿着第一方向设置的信号发射走线（30）和沿着第二方向设置的信号接收走线（40），其中，信号发射走线（30）与扫描线（10）、栅极（202）同层设置，信号接收走线（40）与读取走线（50）、源漏极层（205）同层设置；不增加额外膜层，使光感电路和触控电路集成在一个触控面板内。

Description

触控面板 技术领域
本发明涉及触控显示技术领域，尤其涉及一种触控面板。
 背景技术
现有触控面板通常采用光控传感器和触控传感器单独作用，或者分别采用不同的IC分别控制两个传感器，较难在不增加膜层的情况下集成在同一个面板内。
 技术问题
因此，现有触控面板存在光感电路和触控电路难以集成在同一面板中的技术问题。
 技术解决方案
本发明实施例提供一种液晶显示面板，可以在不增加额外膜层的前提下，缓解现有触控面板存在光感电路和触控电路难以集成在同一面板中的技术问题。
本发明实施例提供一种触控面板，包括阵列设置的多个光线感应区，所述触控面板包括：
沿第一方向设置的多条扫描线；
沿第二方向设置的多条数据线；
光感电路，设置在所述光线感应区内，所述光感电路包括光感晶体管，所述光感晶体管包括衬底、栅极、栅绝缘层、有源层、源漏极层，所述光感晶体管用于将光信号转换为电信号；
触控电路，包括沿着第一方向设置的信号发射电极和沿着第二方向设置的信号接收电极；
其中，所述光感电路包括沿第二方向设置的读取走线，所述信号发射走线与所述扫描线、所述栅极同层设置，所述信号接收走线与所述读取走线、所述源漏极层同层设置。
在本发明实施例提供的触控面板中，所述光感电路还包括开关晶体管，所述光感晶体管的栅极与电源低电位电极连接，所述光感晶体管的第一电极与电源高电位电极连接，所述光感晶体管的第二电极与所述第一开关晶体管的第一电极连接，所述开关晶体管的栅极与所述扫描线连接，所述开关晶体管的第二电极与所述读取走线连接。
在本发明实施例提供的触控面板中，所述光感电路还包括存储电容，所述存储电容包括第一端和第二端，所述第一端与所述光感晶体管的第二电极和所述开关晶体管的第一电极相连接，所述第二端与所述电源低电位电极连接。
在本发明实施例提供的触控面板中，所述光感电路还包括第一位置检测电路，所述第一位置检测电路与所述读取走线连接。
在本发明实施例提供的触控面板中，所述光感电路还包括第二位置检测电路，所述第二位置检测电路与所述信号接收走线连接。
在本发明实施例提供的触控面板中，受到手指触控刺激时，所述信号发射走线与所述信号接收走线之间的存储电容会发生改变，本质为存储电容的电荷发生了改变，电容的变化通过信号传递，信号经过所述第二位置检测电路，可以检测出触摸的位置。
在本发明实施例提供的触控面板中，所述读取走线和所述信号发射走线在所述衬底上的投影存在第一重叠区域，所述扫描线和所述信号接收走线在所述衬底上的投影存在第二重叠区域。
在本发明实施例提供的触控面板中，所述扫描线和所述信号发射走线的数量相同。
在本发明实施例提供的触控面板中，所述扫描线和所述信号发射走线间隔排布。
在本发明实施例提供的触控面板中，所述扫描线和所述信号发射走线的数量不同。
在本发明实施例提供的触控面板中，一扫描线集合和一信号发射走线集合间隔排布。
在本发明实施例提供的触控面板中，扫描线集合包括两条以上扫描线，所述信号发射走线集合包括两条以上信号发射走线。
在本发明实施例提供的触控面板中，所述扫描线集合的走线数量和所述信号发射走线集合的走线数量不同。
在本发明实施例提供的触控面板中，所述扫描线集合的走线数量和所述信号发射走线集合的走线数量相同。
在本发明实施例提供的触控面板中，所述信号发射走线第一时段发出第一信号，所述扫描线第三时段发出第二信号，所述第一时段和所述第三时段之间间隔第二时段，所述第三时段与下一个所述第一时段之间间隔第四时段。
在本发明实施例提供的触控面板中，信号发射走线和扫描线均与周期性的电压相连接。
在本发明实施例提供的触控面板中，第二时段需大于等于信号发射走线中一行信号接收走线数据采集的时间。
在本发明实施例提供的触控面板中，所述第二时段的时间长度大于所述第一时段的时间长度。
在本发明实施例提供的触控面板中，所述第四时段的时间长度大于所述第三时段的时间长度。
本发明实施例提供一种显示器件，包括权利要求1至19的所述触控面板。
 有益效果
本发明实施例提供的触控面板包括阵列设置的多个光线感应区，所述触控面板包括多条扫描线、多条数据线、光感电路、触控电路，所述扫描线沿第一方向设置，所述数据线沿第二方向设置，所述触控电路包括沿着第一方向设置的信号发射电极和沿着第二方向设置的信号接收电极，其中，所述光感电路包括沿第二方向设置的读取走线，所述信号发射走线与所述扫描线、所述栅极同层设置，所述信号接收走线与所述读取走线、所述源漏极层同层设置；通过将所述信号发射走线与所述扫描线、所述栅极同层设置，将所述信号接收走线与所述数据线、所述读取走线同层设置，在不增加额外膜层的前提下，使所述触控电路和光感电路集成在同一触控面板内。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为本发明实施例提供的触控面板的截面示意图；
图2为本发明实施例提供的显示器件的截面示意图；
图3为本发明实施例提供的光控和触控传感器集成的简化电路的示意图；
图4为本发明实施例提供的信号发射走线的电位时序图；
图5为本发明实施例提供的扫描线的电位时序图；
图6为本发明实施例提供的信号发射走线和扫描线行分时的电位时序图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
如图1、图3所示，本发明实施例提供的触控面板包括阵列设置的多个光线感应区1，所述触控面板包括沿第一方向设置的多条扫描线10、沿第二方向设置的多条数据线、光感电路、触控电路，所述光感电路设置在所述光线感应区内，所述光感晶体管20包括衬底201、栅极202、栅绝缘层203、有源层204、源漏极层205，所述光感晶体管20用于将光信号转换为电信号，所述触控电路包括沿着第一方向设置的信号发射电极和沿着第二方向设置的信号接收电极，其中，所述光感电路包括沿第二方向设置的读取走线50，所述信号发射走线30与所述扫描线10、所述栅极202同层设置，所述信号接收走线40与所述读取走线50、所述源漏极层205同层设置。
在本实施例中，触控面板包括阵列设置的多个光线感应区，所述触控面板包括沿第一方向设置的多条扫描线10、沿第二方向设置的多条数据线、光感电路、触控电路，所述光感电路设置在所述光线感应区内，所述光感晶体管20包括衬底201、栅极202、栅绝缘层203、有源层204、源漏极层205，所述光感晶体管20用于将光信号转换为电信号，所述触控电路包括沿着第一方向设置的信号发射电极和沿着第二方向设置的信号接收电极，其中，所述光感电路包括沿第二方向设置的读取走线50，所述信号发射走线30与所述扫描线10、所述栅极202同层设置，所述信号接收走线40与所述读取走线50、所述源漏极层205同层设置；通过将所述信号发射走线30与所述扫描线10、所述栅极202同层设置，将所述信号接收走线40与所述数据线、所述读取走线50同层设置，在不增加额外膜层的前提下，使所述触控电路和光感电路集成在同一触控面板内。
其中，所述光感晶体管20还包括设置在源漏极层205上方的钝化层206、平坦层207、第一光学胶层208、盖板209、黑色矩阵层210。
在一种实施例中，所述光感电路还包括开关晶体管60，所述光感晶体管20的栅极202与电源低电位电极连接，所述光感晶体管20的第一电极与电源高电位电极连接，所述光感晶体管20的第二电极与所述第一开关晶体管60的第一电极连接，所述开关晶体管60的栅极202与所述扫描线10连接，所述开关晶体管60的第二电极与所述读取走线50连接。
在一种实施例中，所述光感电路还包括存储电容70，所述存储电容70包括第一端和第二端，所述第一端与所述光感晶体管20的第二电极和所述开关晶体管60的第一电极相连接，所述第二端与所述电源低电位电极连接。
在一种实施例中，所述光感电路还包括第一位置检测电路801，所述第一位置检测电路801与所述读取走线50连接。
在一种实施例中，所述读取走线50和所述信号发射走线30在所述衬底201上的投影存在第一重叠区域，所述扫描线10和所述信号接收走线在所述衬底201上的投影存在第二重叠区域。
在一种实施例中，所述扫描线10和所述信号发射走线30的数量相同。
在一种实施例中，所述扫描线10和所述信号发射走线30间隔排布。
在一种实施例中，所述扫描线10和所述信号发射走线30的数量不同。
在一种实施例中，一扫描线10集合和一信号发射走线30集合间隔排布。
其中，所述扫描线10集合可以包括两个相邻排布的扫描线10，所述信号发射走线30集合可以包括两个相邻排布的信号发射走线30。
其中，所述扫描线10集合可以包括三个相邻排布的扫描线10，所述信号发射走线30集合可以包括三个相邻排布的信号发射走线30。
其中，所述扫描线10集合还可以包括三个相邻排布的扫描线10，所述信号发射走线30集合还可以包括三个相邻排布的信号发射走线30。
在一种实施例中，一扫描线10集合和一信号发射走线30集合间隔排布，其中，所述扫描线10集合的走线数量和所述信号发射走线30集合的走线数量不同。
在一种实施例中，如图3所示，所述信号发射走线30第一时段发出第一信号，所述扫描线10第三时段发出第二信号，所述第一时段和所述第三时段之间间隔第二时段，所述第三时段与下一个所述第一时段之间间隔第四时段。
其中，第二时段需大于等于信号发射走线30中一行信号接收走线40数据采集的时间。
其中，第四时段需大于等于光感电路数据采集的时间。
在一种实施例中，所述第二时段的时间长度大于所述第一时段的时间长度。
在一种实施例中，所述第四时段的时间长度大于所述第三时段的时间长度。
如图2所示，本发明实施例提供的显示器件包括触控面板和显示面板2，所述触控面板和显示面板2之间通过第二光学胶层211贴合在一起。
其中，显示面板2可以为液晶显示面板2、OLED（Organic Light-Emitting Diode，有机发光二极管），QLED（Quantum Dot Light Emitting Diodes，量子点发光二极管），Mini-LED，Micro-LED中的任一种。
在一种实施例中，在显示器件中，所述光感电路还包括开关晶体管60，所述光感晶体管20的栅极202与电源低电位电极连接，所述光感晶体管20的第一电极与电源高电位电极连接，所述光感晶体管20的第二电极与所述第一开关晶体管60的第一电极连接，所述开关晶体管60的栅极202与所述扫描线10连接，所述开关晶体管60的第二电极与所述读取走线50连接。
在一种实施例中，在显示器件中，所述光感电路还包括存储电容70，所述存储电容70包括第一端和第二端，所述第一端与所述光感晶体管20的第二电极和所述开关晶体管60的第一电极相连接，所述第二端与所述电源低电位电极连接。
在一种实施例中，在显示器件中，所述光感电路还包括第一位置检测电路801，所述第一位置检测电路801与所述读取走线50连接。
在一种实施例中，在显示器件中，所述读取走线50和所述信号发射走线30在所述衬底201上的投影存在第一重叠区域，所述扫描线10和所述信号接收走线在所述衬底201上的投影存在第二重叠区域。
在一种实施例中，在显示器件中，所述扫描线10和所述信号发射走线30的数量相同。
在一种实施例中，在显示器件中，所述扫描线10和所述信号发射走线30间隔排布。
在一种实施例中，在显示器件中，所述扫描线10和所述信号发射走线30的数量不同。
在一种实施例中，在显示器件中，一扫描线10集合和一信号发射走线30集合间隔排布。
其中，所述扫描线10集合可以包括两个相邻排布的扫描线10，所述信号发射走线30集合可以包括两个相邻排布的信号发射走线30。
其中，所述扫描线10集合可以包括三个相邻排布的扫描线10，所述信号发射走线30集合可以包括三个相邻排布的信号发射走线30。
其中，所述扫描线10集合还可以包括三个相邻排布的扫描线10，所述信号发射走线30集合还可以包括三个相邻排布的信号发射走线30。
在一种实施例中，在显示器件中，一扫描线10集合和一信号发射走线30集合间隔排布，其中，所述扫描线10集合的走线数量和所述信号发射走线30集合的走线数量不同。
在一种实施例中，在显示器件中，如图3所示，所述信号发射走线30第一时段发出第一信号，所述扫描线10第三时段发出第二信号，所述第一时段和所述第三时段之间间隔第二时段，所述第三时段与下一个所述第一时段之间间隔第四时段。
其中，第二时段需大于等于信号发射走线30中一行信号接收走线40数据采集的时间。
其中，第四时段需大于等于光感电路数据采集的时间。
在一种实施例中，在显示器件中，所述第二时段的时间长度大于所述第一时段的时间长度。
在一种实施例中，在显示器件中，所述第四时段的时间长度大于所述第三时段的时间长度。
在一种实施例中，光感电路主要由两个薄膜晶体管和一个存储电容70，所述两个薄膜晶体管包括一个光感晶体管20，一个为开关晶体管60。
其中，半导体材料和光敏半导体材料都是采用的氢化非晶硅。
其中，光感电路的工作原理：受到光照刺激时，光感晶体管20中的非晶硅会产生载流子，所述载流子被存储电容70收集，通过开光晶体管进行控制，信号经过所述第一位置检测电路801。
在一种实施例中，触控电路包含多个第一方向的电极和多个第二方向的电极。
其中，所述第一方向的电极排列形成信号发射走线30。
其中，所述第二方向的电极排列形成信号接收走线40。
其中，触控传感器的工作原理：受到手指触控刺激时，信号发射走线30与信号接收走线40之间的投射电容会发生改变，本质为投射电容的电荷发生了改变，通过检查电容的变化，信号经过第二位置检测电路802，可以检测出触摸的位置。
如图3所示，为光感电路和触控电路集成的简化电路图，其中readout line为读出走线，与信号接收走线40同为第二方向设置，当所述触控面板接收到触控或者光控信号时，产生的电荷变化皆可以通过所述读出走线传输，通过位置检测电路放大处理，从而可以准确的定位出信号（光控/触控）刺激点的坐标位置。
在一种实施例中，触控电路的信号发射走线30和光感电路的栅极202电极、电源低电平电极902、以及扫描线10同层设置，为栅极层；触控电路的信号接收走线40和光感电路的电源高电平电极901和读出走线、以及数据线同层设置，为源漏极层205。
其中，信号接收走线40和读出走线的功能为感应信号，其电信号状态是不固定的。
其中，电源低电平电极902和电源高电平电极901为光感晶体管20的电极，为固定的电压。
其中，信号发射走线30电极和扫描线10为周期性的电压。
在一种实施例中，如图3所示，光感电路的读出走线与触控电路的信号发射走线30存在第一交叉重叠耦合区域S1。
其中，如图4所示，第一交叉重叠耦合区域S1的电压在0和Vt之间变化，Vt为第一电压，范围为5V至40V，其频率为ft=1/(t1+t2)。
在一种实施例中，如图3所示，信号接收走线40与扫描线10存在第二交叉重叠耦合区域S2。
其中，如图5所示，第二交叉重叠耦合区域S2的电压在在0和Vgate之间变化，Vgate为第二电压，范围为-20V至20V之间变化，其频率为f1=1/(t3+t4)。
在一种实施例中，信号发射走线30和扫描线10数量相同，且与信号接收走线40和读出走线交叉排列分布，可以采用行分时的方法，通过对信号发射走线30和扫描线10进行交叉扫描的分时方法，可以将触控电路和光感电路按行分时的方法交叉工作，有效的解决触控电路和光感电路之间的串扰问题。
其中，触控电路和光感电路发生串扰的原因为光感电路的读出走线与触控电路的信号发射走线30存在第一交叉重叠耦合区域S1、以及信号接收走线40与扫描线10存在第二交叉重叠耦合区域S2，所述第一交叉重叠耦合区域S1和所述第二交叉重叠耦合区域S2使得触控电路和光感电路互相会发生信号串扰。
在一种实施例中，如图6所示，将信号发射走线30和扫描线10以行分时的方法进行扫描时的时序图，采用分时后的频率f=1/（t1+t2’+t3+t4’）信号发射走线30的扫描时间为第一时段，扫描线10的扫描时间为第三时段，
其中，一个周期的时段T为t1+t2’+t3+t4’。
其中，中间的间隔时间为（t2’+t4’）。
其中，第二时段需大于等于信号发射走线30中一行信号接收走线40数据采集的时间。
其中，第四时段需大于等于光感电路数据采集的时间。
其中，t1为第一时段，t2’为第二时段，t3为第三时段，t4’为第四时段。
本发明实施例提供的触控面板包括阵列设置的多个光线感应区，所述触控面板包括沿第一方向设置的多条扫描线、沿第二方向设置的多条数据线、光感电路、触控电路，所述光感电路设置在所述光线感应区内，所述光感晶体管包括衬底、栅极、栅绝缘层、有源层、源漏极层，所述光感晶体管用于将光信号转换为电信号，所述触控电路包括沿着第一方向设置的信号发射电极和沿着第二方向设置的信号接收电极，其中，所述光感电路包括沿第二方向设置的读取走线，所述信号发射走线与所述扫描线、所述栅极同层设置，所述信号接收走线与所述读取走线、所述源漏极层同层设置；通过将所述信号发射走线与所述扫描线、所述栅极同层设置，将所述信号接收走线与所述数据线、所述读取走线同层设置，在不增加额外膜层的前提下，使所述触控电路和光感电路集成在同一触控面板内。
以上对本发明实施例所提供的一种进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例的技术方案的范围。

Claims (20)

  1. 一种触控面板，其特征在于，包括阵列设置的多个光线感应区，所述触控面板包括：
    沿第一方向设置的多条扫描线；
    沿第二方向设置的多条数据线；
    光感电路，设置在所述光线感应区内，所述光感电路包括光感晶体管，所述光感晶体管包括衬底、栅极、栅绝缘层、有源层、源漏极层，所述光感晶体管用于将光信号转换为电信号；
    触控电路，包括沿着第一方向设置的信号发射电极和沿着第二方向设置的信号接收电极；
    其中，所述光感电路包括沿第二方向设置的读取走线，所述信号发射走线与所述扫描线、所述栅极同层设置，所述信号接收走线与所述读取走线、所述源漏极层同层设置。
  2. 如权利要求1所述的触控面板，其特征在于，所述光感电路还包括开关晶体管，所述光感晶体管的栅极与电源低电位电极连接，所述光感晶体管的第一电极与电源高电位电极连接，所述光感晶体管的第二电极与所述第一开关晶体管的第一电极连接，所述开关晶体管的栅极与所述扫描线连接，所述开关晶体管的第二电极与所述读取走线连接。
  3. 如权利要求2所述的触控面板，其特征在于，所述光感电路还包括存储电容，所述存储电容包括第一端和第二端，所述第一端与所述光感晶体管的第二电极和所述开关晶体管的第一电极相连接，所述第二端与所述电源低电位电极连接。
  4. 如权利要求3所述的触控面板，其特征在于，所述光感电路还包括第一位置检测电路，所述第一位置检测电路与所述读取走线连接。
  5. 如权利要求3所述的触控面板，其特征在于，所述光感电路还包括第二位置检测电路，所述第二位置检测电路与所述信号接收走线连接。
  6. 如权利要求5所述的触控面板，其特征在于，受到手指触控刺激时，所述信号发射走线与所述信号接收走线之间的存储电容会发生改变，本质为存储电容的电荷发生了改变，电容的变化通过信号传递，信号经过所述第二位置检测电路，可以检测出触摸的位置。
  7. 如权利要求1所述的触控面板，其特征在于，所述读取走线和所述信号发射走线在所述衬底上的投影存在第一重叠区域，所述扫描线和所述信号接收走线在所述衬底上的投影存在第二重叠区域。
  8. 如权利要求7所述的触控面板，其特征在于，所述扫描线和所述信号发射走线的数量相同。
  9. 如权利要求7所述的触控面板，其特征在于，所述扫描线和所述信号发射走线间隔排布。
  10. 如权利要求7所述的触控面板，其特征在于，所述扫描线和所述信号发射走线的数量不同。
  11. 如权利要求7所述的触控面板，其特征在于，一扫描线集合和一信号发射走线集合间隔排布。
  12. 如权利要求11所述的触控面板，其特征在于，扫描线集合包括两条以上扫描线，所述信号发射走线集合包括两条以上信号发射走线。
  13. 如权利要求12所述的触控面板，其特征在于，所述扫描线集合的走线数量和所述信号发射走线集合的走线数量不同。
  14. 如权利要求12所述的触控面板，其特征在于，所述扫描线集合的走线数量和所述信号发射走线集合的走线数量相同。
  15. 如权利要求9所述的触控面板，其特征在于，所述信号发射走线第一时段发出第一信号，所述扫描线第三时段发出第二信号，所述第一时段和所述第三时段之间间隔第二时段，所述第三时段与下一个所述第一时段之间间隔第四时段。
  16. 如权利要求15所述的触控面板，其特征在于，信号发射走线和扫描线均与周期性的电压相连接。
  17. 如权利要求15所述的触控面板，其特征在于，第二时段需大于等于信号发射走线中一行信号接收走线数据采集的时间。
  18. 如权利要求15所述的触控面板，其特征在于，所述第二时段的时间长度大于所述第一时段的时间长度。
  19. 如权利要求15所述的触控面板，其特征在于，所述第四时段的时间长度大于所述第三时段的时间长度。
  20. 一种显示器件，其特征在于，包括权利要求1至19的所述触控面板。
PCT/CN2020/129449 2020-10-09 2020-11-17 触控面板 WO2022073281A1 (zh)

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