WO2020238489A1 - 触控显示面板和电子设备 - Google Patents

触控显示面板和电子设备 Download PDF

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Publication number
WO2020238489A1
WO2020238489A1 PCT/CN2020/085921 CN2020085921W WO2020238489A1 WO 2020238489 A1 WO2020238489 A1 WO 2020238489A1 CN 2020085921 W CN2020085921 W CN 2020085921W WO 2020238489 A1 WO2020238489 A1 WO 2020238489A1
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WO
WIPO (PCT)
Prior art keywords
touch
multiplexer
base substrate
display panel
control signal
Prior art date
Application number
PCT/CN2020/085921
Other languages
English (en)
French (fr)
Inventor
颜俊
何帆
刘琦
董向丹
张波
都蒙蒙
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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.)
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/056,185 priority Critical patent/US11347343B2/en
Publication of WO2020238489A1 publication Critical patent/WO2020238489A1/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
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • 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
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate

Definitions

  • the present disclosure relates to the field of display technology, and more particularly to a touch display panel and electronic equipment.
  • AMOLED active matrix light-emitting diode
  • FMLOC flexible multi-layer integrated integrated touch technology
  • An embodiment of the present disclosure provides a touch display panel, including: a display area including a plurality of first touch electrodes and a plurality of second touch electrodes; and a peripheral area located in the display area
  • the periphery wherein the periphery area includes: a first touch trace, the first touch trace is electrically connected to at least one first touch electrode of the plurality of first touch electrodes, and the second touch Control wiring, the second touch wiring is electrically connected to at least one second touch electrode of the plurality of second touch electrodes, an external circuit interface, the external circuit interface is configured to provide the touch The electrical connection between the display panel and the external circuit, and the first multiplexer, the output terminal of the first multiplexer is electrically connected to at least one of the first touch trace and the second touch trace And the input end of the first multiplexer is electrically connected to the external circuit interface.
  • both the first touch trace and the second touch trace are electrically connected to the output end of the same first multiplexer.
  • the peripheral area further includes a bending area, and the first multiplexer is located on a side of the bending area away from the external circuit interface.
  • the touch display panel further includes a second multiplexer, the output end of the first multiplexer is electrically connected to the first touch trace, and the second multiplexer The output end of the multiplexer is electrically connected to the second touch trace and the input end of the second multiplexer is electrically connected to the external circuit interface, wherein the input end of the first multiplexer and The input ends of the second multiplexer are respectively electrically connected to different channels of the external circuit interface.
  • the peripheral area further includes a bending area, and the first multiplexer and the second multiplexer are located between the bending area and the external circuit interface.
  • the input of the first multiplexer includes multiple input channels and the output of the first multiplexer includes multiple output channels, and the first multiplexer
  • the device also includes multiple branches extending from the same input channel to multiple different output channels, and each branch is provided with a control switch.
  • the touch display panel further includes a control circuit configured to provide a control signal to the control switch.
  • one of the first touch electrode and the second touch electrode is a driving electrode, and the other is a sensing electrode, and the driving electrode and the sensing electrode are alternately distributed.
  • the input end of the first multiplexer includes multiple input channels and the output end of the first multiplexer includes multiple output channels
  • the first multiplexer The user includes a plurality of multiplexing components arranged in parallel, and each multiplexing component includes: a main wiring, the main wiring is electrically connected to a corresponding one of the multiple input channels; the first branch goes Line and the second branch line, the first branch line and the second branch line are electrically connected to two corresponding output channels of the plurality of output channels respectively; the first control signal line, the The first control signal line is configured to provide a first control signal for controlling the connection or disconnection of the first branch line and the main line; and a second control signal line, the second control signal line is configured to Provide a second control signal for controlling the connection or disconnection of the second branch line with the main line.
  • the touch display panel further includes a base substrate, wherein each multiplexing component includes: an active layer located on the base substrate; A first insulating layer on one side of the base substrate; a first conductive layer located on the side of the first insulating layer facing away from the base substrate; a first conductive layer located on the side of the first conductive layer facing away from the base substrate And a second conductive layer on the side of the second insulating layer that faces away from the base substrate, and
  • the first control signal line and the second control signal line are arranged in the first conductive layer, and the main wiring, the first branch wiring and the second branch wiring are arranged in the In the second conductive layer, the main wiring, the first branch wiring, and the second branch wiring are connected to the active layer through conductive through portions that penetrate the first insulating layer and the second insulating layer .
  • the orthographic projection of the main trace on the base substrate is located between the orthographic projection of the first branch trace on the base substrate and the orthographic projection of the second branch trace on the base substrate.
  • the road runs between the orthographic projections on the base substrate.
  • the orthographic projection of the first control signal line on the base substrate is located between the orthographic projection of the first branch line on the base substrate and the main The wiring is between the orthographic projection on the base substrate, and the orthographic projection of the second control signal line on the base substrate is located between the orthographic projection of the second branch wiring on the base substrate and the main track The lines are between the orthographic projections on the base substrate.
  • the orthographic projection of each of the main trace, the first control signal line, and the first branch trace on the base substrate and the orthographic projection of the active layer on the base substrate All have overlapping parts, and the orthographic projection of each of the main trace, the second control signal line, and the second branch trace on the base substrate and the orthographic projection of the active layer on the base substrate Both have overlapping parts.
  • the second conductive layer is further provided with: a first signal transmission line, and the first signal transmission line passes through a conductive through part penetrating the second insulating layer and the first signal transmission line in each multiplexing component.
  • a control signal line is electrically connected; and a second signal transmission line, the second signal transmission line is electrically connected to the second control signal line in each multiplexing component through a conductive through portion penetrating the second insulating layer.
  • the touch display panel further includes: a third conductive layer located on a side of the second insulating layer opposite to the base substrate and located on the second conductive layer The side facing the base substrate; and a fourth insulating layer, the fourth insulating layer is located on the side of the third conductive layer away from the base substrate and located on the side of the third insulating layer facing the substrate One side of the substrate, wherein an input terminal is provided in the third conductive layer, and the input terminal is electrically connected to the main wiring via a via structure that penetrates the fourth insulating layer.
  • An embodiment of the present disclosure also provides an electronic device, including the touch display panel according to any one of the above embodiments.
  • FIG. 1A schematically shows an exemplary connection relationship between touch electrodes in a display area of a touch display panel and traces of a peripheral area;
  • FIG. 1B shows a schematic diagram of a wiring method of a peripheral area of a touch display panel
  • FIG. 2 shows a schematic diagram of a touch display panel according to some embodiments of the present disclosure
  • FIG. 3 shows a schematic diagram of a touch display panel according to other embodiments of the present disclosure
  • FIG. 4A schematically shows a local wiring diagram of a touch display panel without a multiplexer at a position adjacent to an external interface
  • 4B schematically shows a local wiring diagram of a touch display panel provided with a multiplexer at a position adjacent to an external interface
  • FIG. 5 schematically shows an exemplary circuit diagram of a multiplexer in a touch display panel according to an embodiment of the present disclosure
  • Fig. 6 schematically shows a partial structure diagram of a multiplexer in a touch display panel according to an embodiment of the present disclosure
  • FIG. 7A shows an exemplary cross-sectional view taken along the line AA in FIG. 6;
  • FIG. 7B shows an exemplary cross-sectional view taken along the line FF in FIG. 6;
  • FIG. 8 shows an exemplary cross-sectional view taken along the line BB in FIG. 6;
  • FIG. 9 shows an exemplary cross-sectional view taken along the line CC in FIG. 6.
  • FIG. 10 schematically shows a schematic diagram of an electronic device including a touch display panel according to an embodiment of the present disclosure.
  • FIG. 1A schematically shows an exemplary connection relationship between touch electrodes in a display area of a touch display panel and traces in a peripheral area.
  • the touch display panel includes a display area 10 and a peripheral area 20.
  • the display area 10 is used to display images, and may include structures such as pixel units.
  • the display area 10 may include a plurality of first touch electrodes 11 and a plurality of second touch electrodes 12.
  • the peripheral area 20 is located at the periphery of the display area 10, for example, is arranged around the display area 10.
  • the peripheral area 20 can be used for routing wires.
  • the peripheral area 20 may include a first touch wire 21 and a second touch wire 22.
  • the first touch wire 21 is electrically connected to at least one first touch electrode 11 of the plurality of first touch electrodes 11, and the second touch wire 22 is electrically connected to the plurality of second touch electrodes.
  • At least one second touch electrode 12 of the control electrodes 12 is electrically connected.
  • the peripheral area 20 may include a plurality of first touch wires 21 and a plurality of second touch wires 22.
  • the plurality of first touch wires 21 and the plurality of second touch wires 22 are used to electrically connect the respective first touch electrodes 11 and the second touch electrodes 12 to other electronic components, respectively.
  • the plurality of first touch electrodes 11 are arranged in a column (vertical direction), and the plurality of second touch electrodes 12 are arranged in a row (horizontal direction).
  • the first touch electrodes 11 in each column of the first touch electrodes 11 are connected by bridges (as shown by the black short lines in FIG. 1A).
  • the two ends of each column of the first touch electrode 11 (the upper end and the lower end in the figure) are connected to the first touch wiring 21, and each row of the second touch electrode 12 has only one end (the right end in the figure).
  • a second touch wire 22 is connected.
  • the first touch electrode 11 can be driven bilaterally, while the second touch electrode 12 is driven unilaterally.
  • this connection method Can be called 2T1R.
  • the first touch electrode 11 driven on both sides has higher requirements for wiring design.
  • the embodiment of the present disclosure is not limited to this.
  • only one end of the first touch electrode 11 of each column may be connected with the first touch wire 21.
  • the touch display panel may further include an external circuit interface 30 configured to provide electrical connection between the touch display panel and an external circuit (for example, a flexible circuit board (FPC) 40).
  • an external circuit for example, a flexible circuit board (FPC) 40.
  • FIG. 1B shows an example of a touch display panel adopting FMLOC technology.
  • the plurality of first touch wires 21 and the plurality of second touch wires 22 are respectively represented by a strip structure as a whole, and each wire is no longer displayed as shown in FIG. 1A .
  • the first touch wire 21 and the second touch wire 22 are electrically connected to the flexible circuit board 40 through the first external circuit interface 31 and the second external circuit interface 32 located on both sides of the display panel, respectively.
  • the flexible circuit board 40 usually needs to be designed as a 6-layer circuit board to meet the functional requirements.
  • an embodiment of the present disclosure provides a touch display panel, in which the peripheral area 20 includes a first multiplexer 51.
  • the output terminal 62 of the first multiplexer 51 is electrically connected to at least one of the first touch wire 21 and the second touch wire 22 (for example, only the first touch wire 21 is electrically connected) Or only electrically connected to the second touch wire 22 or electrically connected to both the first touch wire 21 and the second touch wire 22) and the input terminal 61 of the first multiplexer 51 is connected to the outside
  • the circuit interface 30 is electrically connected.
  • the number of wires input from the input terminal 61 of the first multiplexer 51 is smaller than the number of wires output from the output terminal 62 of the first multiplexer 51.
  • the use of the first multiplexer 51 can reduce the number of wires close to the external circuit interface 30 and save wiring space. It can also reduce the number of channels of the external circuit interface 30 (for example, the number of connection pins of FPC), thereby increasing the physical distance between channels (for example, increase the pitch between connection pins or pads). Help improve product yield and reduce costs.
  • the reduction in the number of signal traces can also reduce the number of channels of the integrated circuit electrically connected to the signal traces, thereby reducing the size and manufacturing cost of the integrated circuit.
  • the first touch electrode 11 may be a driving electrode.
  • a circuit on or outside the display panel may send a signal (Tx) to the driving electrode
  • the second touch electrode 12 may be a sensing electrode.
  • a circuit on or outside the display panel can receive a signal (Rx) from the sensing electrode.
  • the driving electrodes and sensing electrodes may be alternately distributed.
  • the embodiments of the present disclosure are not limited thereto.
  • the first touch electrode 11 may be a sensing electrode
  • the second touch electrode 12 may be a driving electrode.
  • the structure of the first multiplexer 51 will be described below.
  • FIG. 5 shows a schematic circuit diagram of the first multiplexer 51.
  • the input 61 of the first multiplexer 51 only shows two channels, namely the first input channel 611 and the second input channel 612.
  • the output 62 of the first multiplexer 51 may include multiple output channels. In the example of FIG. 5, four output channels of the output end 62 of the first multiplexer 51 are shown, namely the first output channel 621, the second output channel 622, the third output channel 623, and the fourth output. Channel 624.
  • the output terminal 62 of the first multiplexer 51 may also include more channels.
  • the first multiplexer 51 may further include multiple branches extending from the same input channel to multiple different output channels, and a control switch is provided in each branch.
  • the first multiplexer 51 shown in FIG. 5 is a one-to-two multiplexer, that is, one input channel corresponds to two output channels. Specifically, the first input channel 611 corresponds to the first output channel 621 and the second output channel 622, and the second input channel 612 corresponds to the third output channel 623 and the fourth output channel 624.
  • the first multiplexer 51 also includes a first branch 631 extending from the first input channel 611 to the first output channel 621, and a second branch extending from the first input channel 611 to the second output channel 622 632, a third branch 633 extending from the second input channel 612 to the third output channel 623, and a fourth branch 634 extending from the second input channel 612 to the fourth output channel 624.
  • the first branch 631, the second branch 632, the third branch 633, and the fourth branch 634 are respectively provided with a first control switch 641, a second control switch 642, a third control switch 643, and a fourth control switch 644.
  • Each control switch can be controlled by the corresponding control signal line.
  • the control switch is a thin film transistor
  • the corresponding control signal line can be connected to the gate of the thin film transistor to provide the required control signal for the control switch.
  • the touch display panel may further include a control circuit 65 configured to provide a control signal to the control switch.
  • the control circuit 65 can be, for example, an independent signal generating circuit on the touch display panel, or an integrated circuit for performing other functions on the touch display panel (for example, an integrated circuit for controlling touch or display) to save Resources, reduce costs.
  • the control signal may also be generated by an external circuit of the touch display panel.
  • first input channel 611 is connected to the first output channel 621 and the second output channel 622 through the first branch 631 and the second branch 632 respectively.
  • the connection or disconnection between the first input channel 611 and the first output channel 621 can be controlled by controlling the first control switch 641 in the first branch 631.
  • the second control switch 642 in the second branch 632 By controlling the second control switch 642 in the second branch 632, the connection or disconnection between the first input channel 611 and the second output channel 622 can be controlled.
  • time division multiplexing can be used to realize the conversion between the first input channel 611 and the first output channel 621 and the second output channel 622, that is, in the first period, the first control switch 641 Turn on and turn off the second control switch 642 so that the first input channel 611 is connected to the first output channel 621 and disconnected from the second output channel 622.
  • the first control switch 641 is turned off and the second The control switch 642 is opened to make the first input channel 611 communicate with the second output channel 622 and disconnect from the first output channel 621.
  • one-division-two multiplexing (or two-way multiplexing) is taken as an example to introduce the principle of multiplexing.
  • the multiplexer in the example can also be, for example, one to three (one input channel corresponds to three output channels), one to four (one input channel corresponds to four output channels), one to eight (one input channel corresponds to eight Output channels), one to sixteen (one input channel corresponds to sixteen output channels) and other types of multiplexers to further reduce the number of wires on the output side of the multiplexer The number of traces on the input side of the multiplexer.
  • the first multiplexer 51 may include a plurality of multiplexing components 70 (or referred to as multiplexing units) arranged in parallel.
  • each multiplexing component 70 (the part represented by the dashed box in FIG. 5) includes a single input channel in the first multiplexer 51 and multiple outputs corresponding to the single input channel. Channels and multiple branches respectively connecting the single input channel and the corresponding multiple output channels.
  • each multiplexing component 70 may include: a main wiring 71, a first branch wiring 72, a second branch wiring 73, a first control signal line 74, and a second branch wiring.
  • Two control signal line 75 The main wiring 71 is electrically connected to a corresponding one of the input channels (such as the first input channel 611).
  • the first branch wiring 72 and the second branch wiring 73 are electrically connected to two corresponding output channels (such as the first output channel 621 and the second output channel 622) of the multiple output channels, respectively.
  • the first control signal line 74 is configured to provide a first control signal for controlling the connection or disconnection of the first branch wiring 72 and the main wiring 71.
  • the second control signal line 75 is configured to provide a second control signal for controlling the connection or disconnection of the second branch wiring 73 and the main wiring 71.
  • the control switch may be implemented by a thin film transistor (TFT).
  • TFT thin film transistor
  • the touch display panel is provided with a base substrate 81.
  • the multiplexing component 70 includes: an active layer 82 located on a base substrate 81, a first insulating layer 83 located on the side of the active layer 82 opposite to the base substrate 81, and located on the first The first conductive layer 84 on the side of the insulating layer 83 facing away from the base substrate 81, the second insulating layer 85 on the side of the first conductive layer 84 facing away from the base substrate 81, and the The second conductive layer 86 of the second insulating layer 85 opposite to the base substrate 81.
  • the first control signal line 74 and the second control signal line 75 are arranged in the first conductive layer 84, and the main wiring 71, the first branch wiring 72 and the second branch wiring 73 are arranged in the first conductive layer 84.
  • Two conductive layer 86 The main wiring 71, the first branch wiring 72 and the second branch wiring 73 are connected to the active layer 82 through conductive through portions 88 that penetrate the first insulating layer 83 and the second insulating layer 85.
  • a third insulating layer 87 (such as a protective layer, an encapsulation layer, etc.) may also be provided on the side of the second conductive layer 86 opposite to the base substrate 81.
  • an insulating layer (such as a buffer layer, etc.) may also be provided between the active layer 82 and the base substrate 81.
  • the multiplexing component 70 there are two thin film transistor structures in the multiplexing component 70, which correspond to the first control switch 641 and the second control switch 642, respectively. It is marked by a dashed box.
  • the first control signal line 74 constitutes the gate
  • the main wiring 71 and the first branch wiring 72 constitute the source and drain respectively
  • the first insulating layer 83 can Think of it as a gate insulating layer.
  • the second control signal line 75 constitutes the gate
  • the main wiring 71 and the second branch wiring 73 constitute the source and the drain respectively
  • the layer 83 can be regarded as a gate insulating layer.
  • the active layer 82 has a region spanning both the first control switch 641 and the second control switch 642.
  • the first control signal line 74 and the second control signal line 75 may be respectively used to provide a first control signal and a second control signal to realize the switching between the first output channel 621 and the second output channel 622.
  • each multiplexing component 70 as shown in FIG. 8, the orthographic projection of the main wiring 71 on the base substrate 81 is located on the first branch wiring 72 on the base substrate.
  • the orthographic projection on 81 and the second branch wiring 73 are between the orthographic projection on the base substrate 81. This helps to save wiring space.
  • each multiplexing component 70 the orthographic projection of the first control signal line 74 on the base substrate 81 is located on the front of the first branch wiring 72 on the base substrate 81. Between the projection and the orthographic projection of the main wiring 71 on the base substrate 81, the orthographic projection of the second control signal line 75 on the base substrate 81 is located on the second branch wiring 73 on the substrate Between the orthographic projection on the substrate 81 and the orthographic projection of the main trace 71 on the base substrate 81. This can make the wiring in each multiplexing component 70 more compact.
  • the orthographic projection of each of the main trace 71, the first control signal line 74, and the first branch trace 72 on the base substrate 81 and the active layer 82 on the substrate The orthographic projections on the substrate 81 all have overlapping parts, and the orthographic projections of each of the main wiring 71, the second control signal line 75, and the second branch wiring 73 on the base substrate 81 are identical to those of the main wiring 71, the second control signal line 75, and the second branch wiring 73.
  • the orthographic projections of the source layer 82 on the base substrate 81 all have overlapping portions. This method facilitates the formation of a TFT structure in the multiplexing component 70 conveniently.
  • a first signal transmission line 91 and a second signal transmission line 92 may also be arranged in the second conductive layer 86.
  • the first signal transmission line 91 is electrically connected to the first control signal line 74 in each multiplexing component 70 through a conductive through portion 89 (for example, formed by a via hole) penetrating the second insulating layer 85.
  • the second signal transmission line 92 is electrically connected to the second control signal line 75 in each multiplexing component 70 through the conductive through portion 89 penetrating the second insulating layer 85.
  • the electrical connection structure of the second signal transmission line 92 and the second control signal line 75 is shown in FIG. 7A.
  • a third insulating layer 87 such as a protective layer, an encapsulation layer, etc.
  • the electrical connection structure of the first signal transmission line 91 and the first control signal line 74 is very similar. As shown in FIG. 7B, the first signal transmission line 91 is connected to each complex through a conductive through portion 89 penetrating the second insulating layer 85. It is electrically connected with the first control signal line 74 in the assembly 70.
  • the arrangement of the first signal transmission line 91 and the second signal transmission line 92 can provide a trunk for the transmission of the first control signal and the second control signal, which facilitates simultaneous scanning of multiple multiplexing components 70 and improves work efficiency.
  • the multiplexing component 70 may further include a third conductive layer 93.
  • a fourth insulating layer 95 may be provided between the third conductive layer 93 and a part of the second conductive layer 86.
  • the first insulating layer 83 and the second insulating layer 85 may be provided between the third conductive layer 93 and the base substrate 81, or the first insulating layer 83 and the second insulating layer 85 may not be provided.
  • An input terminal 94 for the main wiring 71 can be formed in the third conductive layer 93. The input terminal 94 is used to input signals to each input channel of the multiplexer (one input channel for each multiplexing component).
  • the input terminals 94 of adjacent multiplexing components 70 may be respectively arranged in different conductive layers.
  • the input wiring of the left multiplexing component 70 The terminal 94 is arranged in the third conductive layer 93, and the input terminal 94 ′ of the multiplexing component 70 ′ on the right is arranged in the first conductive layer 84.
  • the input terminals 94, 94' often need to be connected to pins or pads in the external circuit interface. This method can increase the distance between adjacent input terminals in the same conductive layer, thereby facilitating the proximity of the pins or pads. Wiring design.
  • the structure in the first conductive layer 84 is filled with left diagonal lines
  • the structure in the second conductive layer 86 is filled with right diagonal lines
  • the structure in the third conductive layer 93 is filled with diagonal crossing lines.
  • the conductive through portions (or called conductive plugs) between the conductive layers are represented by black squares.
  • the display area 10 of the touch display panel may also be provided with thin film transistors for controlling sub-pixels to perform image display, which may also include an active layer, various conductive layers for forming gates, source and drain electrodes.
  • the insulating layer between the layer and the conductive layer Therefore, the above-mentioned various layer structures in the first multiplexer 51 can be formed in the same process steps as the various film layer structures of the thin film transistors in the display area, without additional process steps.
  • the first touch trace 21 and the second touch trace 22 may be located A grounding layer (VSS) is set between the layer and other conductive layers for signal shielding.
  • VSS grounding layer
  • the first touch trace 21 and the second touch trace 22 may both be electrically connected to the output end 62 of the same first multiplexer 51. Due to the role of the first multiplexer 51, the number of wires on the input side of the first multiplexer 51 can be significantly reduced.
  • the peripheral area 20 of the touch display panel may include a bending area 23, and the bending area 23 may be bent to facilitate connection with an external circuit board such as an FPC.
  • the first multiplexer 51 may be located on a side of the bending area 23 away from the external circuit interface 30.
  • a binding area 24 may be provided in the peripheral area 20 of the touch display panel, and the above-mentioned external circuit interface 30 is provided on the binding area 24.
  • the bending area 23 is located on the side of the binding area 24 close to the display area 10. Through the bending of the bending area 23, the binding area 24 can obtain a certain range of free movement, thereby facilitating connection (for example, plugging) operations with external circuit boards such as FPC.
  • the first multiplexer 51 is located on the side of the bending area 23 away from the external circuit interface 30.
  • the number of traces in the bending area 23 and the binding area 24 (for example, the number of the first touch trace 21 and the number of the second touch trace 22) is significantly reduced (for example, the number of traces in the first one divided by two Multiplexer 51, the number of wires will be reduced by half).
  • FIG. 1B shows that the first touch trace 21 and the second touch trace 22 are respectively located on the two sides (or the bending area) of the touch display panel. 23 or the two sides of the binding area 24) access to the bending area 23 and the binding area 24, and
  • Figure 2 shows the first touch wiring 21 and the second touch wiring 22 on the touch display panel When one side (or one side of the bending area 23 or the binding area 24) is connected to the bending area 23 and the binding area 24.
  • the wiring of the binding area 24 is complicated and the first touch trace 21 and the second touch trace 22 are connected from both sides, and the external FPC board needs to be designed as Six-layer circuit board.
  • the external FPC board can be designed as a four-layer circuit board, which reduces the design difficulty for the external circuit board.
  • multiple multiplexers may also be used for different touch traces.
  • the touch display panel includes a first multiplexer 51 and a second multiplexer 52.
  • the output end of the first multiplexer 51 is electrically connected to the first touch trace 21 and the input end of the first multiplexer 51 is electrically connected to the external circuit interface 30; the second multiplexer
  • the output terminal of 52 is electrically connected to the second touch wire 22 and the input terminal of the second multiplexer 52 is also electrically connected to the external circuit interface 30.
  • the input end of the first multiplexer 51 and the input end of the second multiplexer 52 are electrically connected to different channels of the external circuit interface 30 respectively.
  • This method can also reduce the number of wires in the binding area 24, reduce the wiring difficulty, and optimize the space of the binding area 24.
  • the reduction in the number of wires in the bonding area 24 can also reduce the number of external pins (or pads) of the external circuit interface 30, thereby increasing the spacing between the pins (or pads) and improving the product Yield rate.
  • the first multiplexer 51 and the second multiplexer 52 may be located between the bending area 23 and the external circuit interface 30.
  • 4A shows a partial schematic diagram of the binding area 24 of the touch display panel when the multiplexer is not used (generally corresponding to the area indicated by the dashed frame E in FIG. 1B); and FIG. 4B shows the use of multiplexer A partial schematic diagram of the binding area 24 of the touch display panel when the multiplexer is used (generally corresponding to the area indicated by the dashed frame D in FIG. 3).
  • 4A and 4B show partial schematic diagrams of the portion between the bending area 23 and the external circuit interface 30 that includes the first touch trace 21 in the binding area 24.
  • the external circuit interface 30 shown in the figure includes an FPC interface 33 and a telecommunication test (ET) interface 34.
  • the ground line layer (VSS) 25 and the power supply line layer (VDD) 26 are also shown in FIGS. 4A and 4B. It can be seen from the comparison between FIG. 4A and FIG. 4B that after the first multiplexer 51 is adopted, the number of first touch wires 21 in the binding area 24 is significantly reduced, and the space occupied in the binding area 24 It is also significantly smaller, and accordingly, the space occupied by the ground line layer 25, the FPC interface 33 and the telecommunications test (ET) interface 34 is also reduced. The left space can be used for other signal traces. Since the space required by the FPC interface 33 and the ET interface 34 becomes smaller, if it is necessary to increase the pin spacing of the FPC interface 33 and the ET interface 34 to reduce the process difficulty, it is also easy to implement.
  • the positions of the first multiplexer 51 and the second multiplexer 52 are not limited to being arranged between the bending area 23 and the external circuit interface 30, for example, It can also be arranged on the side of the bending area 23 facing away from the external circuit interface 30.
  • the touch display panel may be an organic light emitting diode display panel.
  • the embodiments of the present disclosure are not limited thereto.
  • the touch display panel can be applied to any touch display device, such as smart phones, wearable smart watches, smart glasses, tablets, televisions, monitors, notebook computers, digital photo frames, navigators, car monitors, e-books Etc. Any product or component with display function.
  • the embodiment of the present disclosure also provides an electronic device 200.
  • the electronic device 200 includes the touch display panel 100 according to any one of the foregoing embodiments.
  • the electronic device can be, for example, any touch display device, such as smart phones, wearable smart watches, smart glasses, tablet computers, televisions, monitors, notebook computers, digital photo frames, navigators, car monitors, e-books, etc. .

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Abstract

本公开的实施例提供了一种触控显示面板。该触控显示面板可以包括：显示区，所述显示区包括多个第一触控电极和多个第二触控电极；以及周边区，位于所述显示区的周边，其中，所述周边区包括：第一触控走线，所述第一触控走线与所述多个第一触控电极中的至少一个第一触控电极电连接，第二触控走线，所述第二触控走线与所述多个第二触控电极中的至少一个第二触控电极电连接，外部电路接口，所述外部电路接口配置成提供所述触控显示面板与外部电路的电连接，和第一多路复用器，所述第一多路复用器的输出端与第一触控走线和第二触控走线中的至少一者电连接且所述第一多路复用器的输入端与外部电路接口电连接。

Description

触控显示面板和电子设备
相关申请的交叉引用
本申请要求于2019年5月31日递交中国专利局的、申请号为201910474982.0的 中国专利申请的权益，该申请的全部内容以引用方式并入本文。
技术领域
本公开涉及显示技术领域，尤其涉及一种触控显示面板和电子设备。
背景技术
随着主动矩阵式发光二极管(AMOLED)技术的迅速发展，手机的发展进入了全面屏以及窄边框时代。为了给用户带来更优的使用体验，全面屏、窄边框、高分辨率、卷曲穿戴、折叠等必将成为未来AMOLED的重要发展方向。为了实现显示面板的轻薄化以适应以后的折叠及卷曲产品，出现了柔性多层一体化集成触控技术(FMLOC技术)，采用这种技术，显示面板的外围走线经弯折区域通过背板(BP)膜层，最终向柔性电路板(FPC)和电讯测试(ET)接口连接。FMLOC技术使得显示面板周边上的布线更加复杂。
公开内容
本公开的实施例提供了一种触控显示面板，包括：显示区，所述显示区包括多个第一触控电极和多个第二触控电极；以及周边区，位于所述显示区的周边，其中，所述周边区包括：第一触控走线，所述第一触控走线与所述多个第一触控电极中的至少一个第一触控电极电连接，第二触控走线，所述第二触控走线与所述多个第二触控电极中的至少一个第二触控电极电连接，外部电路接口，所述外部电路接口配置成提供所述触控显示面板与外部电路的电连接，和第一多路复用器，所述第一多路复用器的输出端与第一触控走线和第二触控走线中的至少一者电连接且所述第一多路复用器的输入端与外部电路接口电连接。
在一些实施例中，所述第一触控走线和第二触控走线均电连接于同一第一多路复用器的输出端。
在一些实施例中，所述周边区还包括弯折区域，所述第一多路复用器位于所述弯折区域远离所述外部电路接口的一侧。
在一些实施例中，所述触控显示面板还包括第二多路复用器，所述第一多路复用器的输出端与第一触控走线电连接，所述第二多路复用器的输出端与第二触控走线电连接且所述第二多路复用器的输入端与外部电路接口电连接，其中，所述第一多路复用器的输入端和第二多路复用器的输入端分别电连接于外部电路接口的不同的通道。
在一些实施例中，所述周边区还包括弯折区域，所述第一多路复用器和第二多路复用器位于所述弯折区域与所述外部电路接口之间。
在一些实施例中，所述第一多路复用器的输入端包括多个输入通道且所述第一多路复用器的输出端包括多个输出通道，所述第一多路复用器还包括从同一个所述输入通道分别延伸至多个不同的所述输出通道的多个支路，且在每个支路中设有控制开关。
在一些实施例中，所述触控显示面板还包括控制电路，该控制电路配置成为所述控制开关提供控制信号。
在一些实施例中，所述第一触控电极和第二触控电极中的一者为驱动电极，另一者为感应电极，所述驱动电极和感应电极交替分布。
在一些实施例中，所述第一多路复用器的输入端包括多个输入通道且所述第一多路复用器的输出端包括多个输出通道，且所述第一多路复用器包括并行布置的多个复用组件，每个复用组件包括：主走线，所述主走线与所述多个输入通道中的对应的一个输入通道电连接；第一支路走线和第二支路走线，所述第一支路走线和第二支路走线与所述多个输出通道中的两个对应的输出通道分别电连接；第一控制信号线，所述第一控制信号线配置用于提供控制所述第一支路走线与主走线连通或断开的第一控制信号；以及第二控制信号线，所述第二控制信号线配置用于提供控制所述第二支路走线与主走线连通或断开的第二控制信号。
在一些实施例中，所述触控显示面板，还包括衬底基板，其中，每个复用组件包括：位于衬底基板上的有源层；位于所述有源层的背对所述衬底基板的一侧的第一绝缘层；位于所述第一绝缘层的背对所述衬底基板的一侧的第一导电层；位于所述第一导电层的背对所述衬底基板的一侧的第二绝缘层；以及位于所述第二绝缘层的背对所述衬底基板的一侧的第二导电层，且
其中，所述第一控制信号线和所述第二控制信号线布设于所述第一导电层中，所 述主走线、第一支路走线和第二支路走线布设于所述第二导电层中，所述主走线、第一支路走线和第二支路走线通过贯穿所述第一绝缘层和第二绝缘层的导电的贯通部与所述有源层连接。
在一些实施例中，在每个复用组件中，所述主走线在衬底基板上的正投影位于所述第一支路走线在衬底基板上的正投影和所述第二支路走线在衬底基板上的正投影之间。
在一些实施例中，在每个复用组件中，所述第一控制信号线在衬底基板上的正投影位于所述第一支路走线在衬底基板上的正投影和所述主走线在衬底基板上的正投影之间，所述第二控制信号线在衬底基板上的正投影位于所述第二支路走线在衬底基板上的正投影和所述主走线在衬底基板上的正投影之间。
在一些实施例中，所述主走线、第一控制信号线和第一支路走线中每一者在衬底基板上的正投影与所述有源层在衬底基板上的正投影均具有重叠部分，且所述主走线、第二控制信号线和第二支路走线中每一者在衬底基板上的正投影与所述有源层在衬底基板上的正投影均具有重叠部分。
在一些实施例中，在所述第二导电层中还布设有：第一信号传输线，所述第一信号传输线通过贯穿所述第二绝缘层的导电的贯通部与各个复用组件中的第一控制信号线电连接；以及第二信号传输线，所述第二信号传输线通过贯穿所述第二绝缘层的导电的贯通部与各个复用组件中的第二控制信号线电连接。
在一些实施例中，所述触控显示面板还包括：第三导电层，所述第三导电层位于第二绝缘层的背对所述衬底基板的一侧且位于所述第二导电层的朝向所述衬底基板的一侧；以及第四绝缘层，所述第四绝缘层位于所述第三导电层的远离衬底基板的一侧且位于所述第三绝缘层的朝向衬底基板的一侧，其中，所述第三导电层中设置有输入接线端，所述输入接线端经由透过第四绝缘层的过孔结构与主走线电连接。
本公开的实施例还提供了一种电子设备，包括如上述实施例中任一项所述的触控显示面板。
附图说明
为了更清楚地说明本公开文本的实施例的技术方案，下面将对实施例的附图进行简要说明，应当知道，以下描述的附图仅仅涉及本公开文本的一些实施例，而非对本 公开文本的限制，其中：
图1A示意性地示出一种触控显示面板的显示区中的触控电极与周边区的走线的示例性连接关系；
图1B示出一种触控显示面板的周边区的布线方式的示意图；
图2示出根据本公开的一些实施例的触控显示面板的示意图；
图3示出根据本公开的另一些实施例的触控显示面板的示意图；
图4A示意性地示出未设置多路复用器的触控显示面板在邻近外部接口位置处的局部走线图；
图4B示意性地示出设置有多路复用器的触控显示面板在邻近外部接口位置处的局部走线图；
图5示意性地示出根据本公开的实施例的触控显示面板中的多路复用器的示例性电路图；
图6示意性地示出根据本公开的实施例的触控显示面板中的多路复用器的局部结构图；
图7A示出沿着图6中的线AA得到的示例性剖视图；
图7B示出沿着图6中的线FF得到的示例性剖视图；
图8示出沿着图6中的线BB得到的示例性剖视图；
图9示出沿着图6中的线CC得到的示例性剖视图；以及
图10示意性的示出包括根据本公开的实施例的触控显示面板的电子设备的示意图。
具体实施方式
为更清楚地阐述本公开的目的、技术方案及优点，以下将结合附图对本公开的实施例进行详细的说明。应当理解，下文对于实施例的描述旨在对本公开的总体构思进行解释和说明，而不应当理解为是对本公开的限制。在说明书和附图中，相同或相似的附图标记指代相同或相似的部件或构件。为了清晰起见，附图不一定按比例绘制，并且附图中可能省略了一些公知部件和结构。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一股技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词 语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。措词“一”或“一个”不排除多个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”“顶”或“底”等等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。当诸如层、膜、区域或衬底基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
图1A示意性地示出一种触控显示面板的显示区中的触控电极与周边区的走线的示例性连接关系。在图1A中，触控显示面板包括显示区10和周边区20。显示区10用于显示图像，可以包括像素单元等结构。为了实现触控功能，显示区10可以包括多个第一触控电极11和多个第二触控电极12。
周边区20位于显示区10的周边，例如围绕显示区10布置。该周边区20可以用于布设走线。例如，该周边区20可以包括第一触控走线21和第二触控走线22。所述第一触控走线21与所述多个第一触控电极11中的至少一个第一触控电极11电连接，所述第二触控走线22与所述多个第二触控电极12中的至少一个第二触控电极12电连接。在一些实施例中，周边区20可包括多条第一触控走线21和多条第二触控走线22。该多条第一触控走线21和多条第二触控走线22用于分别将各个第一触控电极11和第二触控电极12与其他电子部件电连接。
需要说明的是，在图1A中，多个第一触控电极11按列排列(竖直方向)，多个第二触控电极12按行排列(水平方向)。每列第一触控电极11中的各个第一触控电极11之间通过桥接(如图1A中的黑色短线所示)来连接。每列第一触控电极11的两端(图中为上端和下端)都接有第一触控走线21，而每行第二触控电极12的两端中只有一端(图中为右端)接有第二触控走线22。该情况下第一触控电极11可以被双边驱动，而第二触控电极12为单边驱动，当第一触控电极为驱动电极，第二触控电极为感应电极时，该种连接方式可称为2T1R。双边驱动的第一触控电极11对于布线设计具有更高的要求。然而，本公开的实施例不限于此，例如，每列第一触控电极11的两端中也可以只有一端接有第一触控走线21。
参见图1B，触控显示面板还可以包括外部电路接口30，所述外部电路接口30配 置成提供所述触控显示面板与外部电路(例如柔性电路板(FPC)40)的电连接。
图1B示出了一种采用FMLOC技术的触控显示面板的示例。在图1B中，为了显示方便起见，多条第一触控走线21和多条第二触控走线22分别整体上由带状结构来表示，不再如图1A那样显示每条走线。在该示例中，第一触控走线21和第二触控走线22分别通过位于显示面板两边的第一外部电路接口31和第二外部电路接口32与柔性电路板40电连接。此种情况下，柔性电路板40通常需要被设计成6层电路板才能满足功能要求。而且，随着技术的发展，对于周边区20变窄的需求越来越大，而同时希望显示区10中的触控电极数量增加来改善触控功能(比如用于尺寸更大、触控信号通道更多的显示面板)，这样，对于周边区20(或者说是显示面板的边框)的空间利用率的要求将越来越高。
为此，本公开的实施例提供了一种触控显示面板，在该触控显示面板中，周边区20包括第一多路复用器51。所述第一多路复用器51的输出端62与第一触控走线21和第二触控走线22中的至少一者电连接(例如仅与第一触控走线21电连接或仅与第二触控走线22电连接或与第一触控走线21和第二触控走线22均电连接)且所述第一多路复用器51的输入端61与外部电路接口30电连接。第一多路复用器51的输入端61输入的走线数量要小于从第一多路复用器51的输出端62输出的走线数量。例如，当第一多路复用器51是一分二的多路复用器时，第一多路复用器51的输入端61输入的走线数量是从第一多路复用器51的输出端62输出的走线数量的一半。因此，采用第一多路复用器51，可以减少靠近外部电路接口30的走线数量，节约布线空间。其还可以减少外部电路接口30的通道数量(例如FPC的连接引脚的数量)，从而可以增大通道之间的物理间距(例如增大连接引脚或焊盘之间的节距)，有助于提升产品良率、降低成本。另外，信号走线数量的减少，还可以使得与信号走线电连接的集成电路的通道数减少，从而减少集成电路的尺寸和制作成本。
在一些实施例中，该第一触控电极11可以为驱动电极，例如显示面板上的或显示面板外部的电路可以向驱动电极发送信号(Tx)，该第二触控电极12可以为感应电极，例如显示面板上的或显示面板外部的电路可以从感应电极接收信号(Rx)。所述驱动电极和感应电极可以交替分布。但本公开的实施例不限于此，例如，第一触控电极11可以为感应电极，该第二触控电极12可以为驱动电极。
下面对于第一多路复用器51的结构进行介绍。
图5给出了第一多路复用器51的示意性电路原理图。为了清楚起见，在图5中，第一多路复用器51的输入端61仅仅示出了两个通道，即第一输入通道611和第二输入通道612。本领域技术人员应当理解，在实际中，第一多路复用器51的输入端61可以包括更多的通道。第一多路复用器51的输出端62可以包括多个输出通道。在图5的示例中，示出了第一多路复用器51的输出端62的四个输出通道，即第一输出通道621、第二输出通道622、第三输出通道623和第四输出通道624。同样，在本公开的实施例中，第一多路复用器51的输出端62也可以包括更多的通道。
在一些实施例中，第一多路复用器51还可以包括从同一个所述输入通道分别延伸至多个不同的输出通道的多个支路，且在每个支路中设有控制开关。图5所示出的第一多路复用器51是一分二多路复用器，即一个输入通道对应于两个输出通道。具体地，第一输入通道611对应于第一输出通道621和第二输出通道622，第二输入通道612对应于第三输出通道623和第四输出通道624。该第一多路复用器51还包括有从第一输入通道611延伸至第一输出通道621的第一支路631、从第一输入通道611延伸至第二输出通道622的第二支路632、从第二输入通道612延伸至第三输出通道623的第三支路633以及从第二输入通道612延伸至第四输出通道624的第四支路634。在第一支路631、第二支路632、第三支路633以及第四支路634中分别设置有第一控制开关641、第二控制开关642、第三控制开关643以及第四控制开关644。每个控制开关可以由对应的控制信号线进行控制。例如，当控制开关为薄膜晶体管时，则对应的控制信号线可以连接至该薄膜晶体管的栅极，以为控制开关提供所需的控制信号。
在一些实施例中，该触控显示面板还可以包括控制电路65，该控制电路65配置成为所述控制开关提供控制信号。该控制电路65例如可以是触控显示面板上的独立的信号生成电路，也可以是触控显示面板上用于执行其他功能的集成电路(例如用于控制触控或显示的集成电路)以节约资源，降低成本。另外，在一些实施例中，控制信号也可以由触控显示面板的外接电路来生成。
以第一输入通道611为例，其分别通过第一支路631和第二支路632与第一输出通道621和第二输出通道622相连。通过控制第一支路631中的第一控制开关641可以控制第一输入通道611和第一输出通道621之间的连通或断开。而通过控制第二支路632中的第二控制开关642可以控制第一输入通道611和第二输出通道622之间的连通或断开。为此，在一些实施例中，可以采用时分复用的方式来实现第一输入通道 611与第一输出通道621和第二输出通道622的转换，即在第一时段，将第一控制开关641打开、第二控制开关642关断以使第一输入通道611与第一输出通道621连通并与第二输出通道622断开，而在第二时段，将第一控制开关641关断、第二控制开关642打开以使第一输入通道611与第二输出通道622连通并与第一输出通道621断开。这样，通过在第一时段中在第一输入通道611输入第一信号(例如Tx或Rx信号)而在第二时段中在第一输入通道611输入第二信号，可以从第一输出通道621和第二输出通道622分别获得该第一信号和第二信号。这就实现了多路复用的功能。
在上述实施例中以一分二多路复用(或称两路复用)为例对多路复用的原理进行介绍，然而，本公开的实施例不限于此，例如，本公开的实施例中的多路复用器还可以例如是一分三(一个输入通道对应三个输出通道)、一分四(一个输入通道对应四个输出通道)、一分八(一个输入通道对应八个输出通道)、一分十六(一个输入通道对应十六个输出通道)等等类型的多路复用器，以在多路复用器的输出侧的走线数量不变的情况下进一步减少多路复用器输入侧的走线数量。
在一些实施例中，从电路布线结构图的角度，第一多路复用器51可包括并行布置的多个复用组件70(或称为复用单元)。在图5所示的电路图中，每个复用组件70(图5中虚线框所表示的部分)包括第一多路复用器51中单个输入通道、与该单个输入通道对应的多个输出通道以及分别连接该单个输入通道和对应的多个输出通道之间的多个支路。
如图6所示，在电路布线结构中，每个复用组件70可以包括：主走线71、第一支路走线72、第二支路走线73、第一控制信号线74以及第二控制信号线75。该主走线71与所述多个输入通道中的对应的一个输入通道(如第一输入通道611)电连接。该第一支路走线72和第二支路走线73与所述多个输出通道中的两个对应的输出通道(如第一输出通道621和第二输出通道622)分别电连接。第一控制信号线74配置用于提供控制所述第一支路走线72与主走线71连通或断开的第一控制信号。第二控制信号线75配置用于提供控制所述第二支路走线73与主走线71连通或断开的第二控制信号。在一些实施例中，控制开关可以由薄膜晶体管(TFT)实现。为了显示方便起见，图6中仅显示了导电层和半导体层(有源层)，而省略了绝缘层。
图7A、图7B和图8分别给出了沿着图6中的线AA、线FF和线BB截得的剖视图。从图8中可以更清楚地看出复用组件70的层结构。触控显示面板设有衬底基板 81。该复用组件70包括：位于衬底基板81上的有源层82、位于所述有源层82的背对所述衬底基板81的一侧的第一绝缘层83、位于所述第一绝缘层83的背对所述衬底基板81的一侧的第一导电层84、位于所述第一导电层84的背对所述衬底基板81的一侧的第二绝缘层85以及位于所述第二绝缘层85的背对所述衬底基板81的一侧的第二导电层86。该第一控制信号线74和第二控制信号线75布设于所述第一导电层84中，主走线71、第一支路走线72和第二支路走线73布设于所述第二导电层86中。主走线71、第一支路走线72和第二支路走线73通过贯穿所述第一绝缘层83和第二绝缘层85的导电的贯通部88与所述有源层82连接。作为示例，在第二导电层86的背对衬底基板81的一侧上还可以设置第三绝缘层87(如保护层、封装层等)。在一些实施例中，在有源层82和衬底基板81之间还可以设置有绝缘层(例如缓冲层等)。
在图8中可以看出，对于一分二的多路复用器，在复用组件70中包含有两个薄膜晶体管结构，分别对应于第一控制开关641和第二控制开关642，分别用虚线框标出。在第一控制开关641所对应的结构中，第一控制信号线74构成了栅极，主走线71和第一支路走线72分别构成了源极和漏极，第一绝缘层83可以看成是栅极绝缘层。类似地，在第二控制开关642所对应的结构中，第二控制信号线75构成了栅极，主走线71和第二支路走线73分别构成了源极和漏极，第一绝缘层83可以看成是栅极绝缘层。在该示例中，有源层82具有跨第一控制开关641和第二控制开关642两者的区域。第一控制信号线74和第二控制信号线75可以分别用于提供第一控制信号和第二控制信号来实现第一输出通道621和第二输出通道622之间的切换。
在一些实施例中，在每个复用组件70中，如图8所示，所述主走线71在衬底基板81上的正投影位于所述第一支路走线72在衬底基板81上的正投影和所述第二支路走线73在衬底基板81上的正投影之间。这有利于节约布线空间。
在一些实施例中，在每个复用组件70中，所述第一控制信号线74在衬底基板81上的正投影位于所述第一支路走线72在衬底基板81上的正投影和所述主走线71在衬底基板81上的正投影之间，所述第二控制信号线75在衬底基板81上的正投影位于所述第二支路走线73在衬底基板81上的正投影和所述主走线71在衬底基板81上的正投影之间。这可以使得每个复用组件70中的布线更为紧凑。
在一些实施例中，所述主走线71、第一控制信号线74和第一支路走线72中每一者在衬底基板81上的正投影与所述有源层82在衬底基板81上的正投影均具有重叠部 分，且所述主走线71、第二控制信号线75和第二支路走线73中每一者在衬底基板81上的正投影与所述有源层82在衬底基板81上的正投影均具有重叠部分。这种方式有利于在复用组件70中方便地形成TFT结构。
在一些实施例中，如图6和图7A所示，在所述第二导电层86中还可以布设有第一信号传输线91和第二信号传输线92。所述第一信号传输线91通过贯穿所述第二绝缘层85的导电的贯通部89(例如通过过孔形成)与各个复用组件70中的第一控制信号线74电连接。第二信号传输线92通过贯穿所述第二绝缘层85的导电的贯通部89与各个复用组件70中的第二控制信号线75电连接。图7A中示出了第二信号传输线92和第二控制信号线75的电连接结构。作为示例，在第二信号传输线92上还可以设置第三绝缘层87(如保护层、封装层等)。
第一信号传输线91和第一控制信号线74的电连接结构与之非常类似，如图7B所示，第一信号传输线91通过贯穿所述第二绝缘层85的导电的贯通部89与各个复用组件70中的第一控制信号线74电连接。第一信号传输线91和第二信号传输线92的布置可以为第一控制信号和第二控制信号的传输提供干路，有利于对于多个复用组件70同时进行扫描，提高工作效率。
从图6和图9中可以看出，复用组件70还可以包括第三导电层93。第三导电层93与第二导电层86的局部之间可以设置第四绝缘层95。在第三导电层93和衬底基板81之间可以设置有上述第一绝缘层83和第二绝缘层85，也可以不设置第一绝缘层83和第二绝缘层85。在该第三导电层93中可以形成用于主走线71的输入接线端94。该输入接线端94用于将信号输入到多路复用器的各个输入通道中(每个复用组件一个输入通道)。在一些实施例中，相邻的复用组件70中的该输入接线端94可以分别设置在不同的导电层中，例如，在图6所示的示例中，左边的复用组件70的输入接线端94设置在第三导电层93中，而右边的复用组件70’的输入接线端94’则设置在第一导电层84中。输入接线端94、94’往往需要连接至外部电路接口中的引脚或焊盘，这种方式可以增大在同一导电层中相邻的输入接线端的间距，从而方便引脚或焊盘附近的布线设计。
在图6至图9中第一导电层84中的结构用左斜线填充，第二导电层86中的结构用右斜线填充，第三导电层93中的结构用斜交叉线填充，不同导电层之间的导电的贯通部(或称为导电插塞)由黑色方块表示。
在一些实施例中，触控显示面板的显示区10中也可设置有用于控制子像素进行图像显示的薄膜晶体管，其也会包括有源层、用于形成栅极、源漏极的各个导电层及导电层之间的绝缘层。因此，第一多路复用器51中上述各个层结构可以与显示区中的薄膜晶体管的各个膜层结构在同样的工艺步骤中形成，而不需要额外增加工艺步骤。
在一些实施例中，为了避免第一触控走线21和第二触控走线22与其他的走线发生信号串扰，可以在第一触控走线21和第二触控走线22所在的层与其他导电层之间设置接地层(VSS)以进行信号屏蔽。
第一多路复用器51在触控显示面板上的具体应用方式可以有多种。在一些实施例中，如图2所示，所述第一触控走线21和第二触控走线22可以均电连接于同一第一多路复用器51的输出端62。由于第一多路复用器51的作用，位于第一多路复用器51的输入侧的走线数量可以明显减少。触控显示面板的周边区20可以包括弯折区域23，该弯折区域23可以弯折，以便于与FPC等外接电路板连接。在一些实施例中，所述第一多路复用器51可以位于所述弯折区域23远离所述外部电路接口30的一侧。
如图2所示，为了与FPC等外接电路板连接，在触控显示面板的周边区20中可设置有绑定区24，在绑定区24上设置有上述外部电路接口30。而弯折区域23位于绑定区24的靠近显示区10的一侧。通过弯折区域23的弯曲，绑定区24可以获得一定的自由活动范围，从而便于完成与FPC等外接电路板的连接(例如插接)操作。在图2的示例中，第一多路复用器51位于所述弯折区域23远离所述外部电路接口30的一侧。因此，在弯折区域23和绑定区24中的走线数量(例如第一触控走线21和第二触控走线22的数量)都明显减少(例如对于一分二的第一多路复用器51，走线数量将减少一半)。这就降低了在弯折区域23和绑定区24上布设走线的难度。于是，所有的第一触控走线21和第二触控走线22均可以经由同一个多路复用器(第一多路复用器51)布设到弯折区域23和绑定区24，这样，可以实现将第一触控走线21和第二触控走线22在触控显示面板的一边(或者说是弯折区域23或绑定区24的一边)接入弯折区域23和绑定区24。
这可以通过对比图1B和图2清楚地看出，图1B示出的是第一触控走线21和第二触控走线22分别在触控显示面板的两边(或者说是弯折区域23或绑定区24的两边)接入弯折区域23和绑定区24的情形，而图2示出的是第一触控走线21和第二触控走线22在触控显示面板的一边(或者说是弯折区域23或绑定区24的一边)接入弯折区 域23和绑定区24的情形。对于图1B的情形，由于没有采用多路复用器，绑定区24的布线复杂且第一触控走线21和第二触控走线22从两边接入，需要外接的FPC板设计成六层电路板。而在图2示出的采用第一多路复用器51的示例中，弯折区域23和绑定区24中的走线数量得到明显减少，且可以将第一触控走线21和第二触控走线22从同一边接入。于是，外接的FPC板可以设计成四层电路板，降低了对于外接的电路板的设计难度。
在一些实施例中，也可以对于不同的触控走线分别采用多个多路复用器。例如，如图3所示，触控显示面板包括第一多路复用器51和第二多路复用器52。第一多路复用器51的输出端与第一触控走线21电连接且所述第一多路复用器51的输入端与外部电路接口30电连接；第二多路复用器52的输出端与第二触控走线22电连接且所述第二多路复用器52的输入端也与外部电路接口30电连接。所述第一多路复用器51的输入端和第二多路复用器52的输入端分别电连接于外部电路接口30的不同的通道。这种方式也可以使绑定区24布设的走线数量减少，降低布线难度，优化绑定区24的空间。同时，绑定区24布设的走线数量的减少，还可以使外部电路接口30的外接引脚(或焊盘)数量减少，从而增加引脚(或焊盘)之间的间距，提高产品的良率。
在一些实施例中，所述第一多路复用器51和第二多路复用器52可以位于所述弯折区域23与所述外部电路接口30之间。图4A示出了未采用多路复用器时触控显示面板的绑定区24的局部示意图(大体对应于图1B中用虚线框E表示的区域)；而图4B示出了采用多路复用器时触控显示面板的绑定区24的局部示意图(大体对应于图3中用虚线框D表示的区域)。在图4A和图4B中示出的是绑定区24中包含第一触控走线21从弯折区域23至外部电路接口30之间的部分的局部的示意图。图中示出的外部电路接口30包括FPC接口33和电讯测试(ET)接口34。图4A和图4B中还示出了接地线层(VSS)25和电源线层(VDD)26。从图4A和图4B的对比可以看出，采用第一多路复用器51之后，绑定区24中第一触控走线21的数量明显减少，在绑定区24中所占据的空间也明显变小，相应地，接地线层25以及FPC接口33和电讯测试(ET)接口34所占据的空间也得以减小。留出的空间可以用于其他信号走线。由于FPC接口33和电讯测试(ET)接口34所需要的空间变小，因此如果需要将FPC接口33和电讯测试(ET)接口34的引脚的间距增大来降低工艺难度，也易于实现。
在本公开的实施例中，所述第一多路复用器51和第二多路复用器52的位置并不 限于设置在弯折区域23与所述外部电路接口30之间，例如其也可以设置在弯折区域23背对外部电路接口30的一侧上。
在一些实施例中，触控显示面板可以为有机发光二极管显示面板。但本公开的实施例不限于此。所述触控显示面板可以应用于任何触控显示装置，例如智能手机、可穿戴式智能手表、智能眼镜、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪、车载显示器、电子书等任何具有显示功能的产品或部件。
本公开的实施例还提供了一种电子设备200，如图10所示，该电子设备200包括根据上述任一实施例所述的触控显示面板100。该电子设备例如可以为任何一种触控显示装置，如智能手机、可穿戴式智能手表、智能眼镜、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪、车载显示器、电子书等。
虽然结合附图对本公开进行了说明，但是附图中公开的实施例旨在对本公开的实施例进行示例性说明，而不能理解为对本公开的一种限制。附图中的尺寸比例仅仅是示意性的，并不能理解为对本公开的限制。
上述实施例仅例示性的说明了本公开的原理及构造，而非用于限制本公开，本领域的技术人员应明白，在不偏离本公开的总体构思的情况下，对本公开所作的任何改变和改进都在本公开的范围内。本公开的保护范围，应如本申请的权利要求书所界定的范围为准。

Claims (16)

  1. 一种触控显示面板，包括：
    显示区，所述显示区包括多个第一触控电极和多个第二触控电极；以及
    周边区，位于所述显示区的周边，
    其中，所述周边区包括：
    第一触控走线，所述第一触控走线与所述多个第一触控电极中的至少一个第一触控电极电连接，
    第二触控走线，所述第二触控走线与所述多个第二触控电极中的至少一个第二触控电极电连接，
    外部电路接口，所述外部电路接口配置成提供所述触控显示面板与外部电路的电连接，和
    第一多路复用器，所述第一多路复用器的输出端与第一触控走线和第二触控走线中的至少一者电连接且所述第一多路复用器的输入端与外部电路接口电连接。
  2. 根据权利要求1所述的触控显示面板，其中，所述第一触控走线和第二触控走线均电连接于同一第一多路复用器的输出端。
  3. 根据权利要求2所述的触控显示面板，其中，所述周边区还包括弯折区域，所述第一多路复用器位于所述弯折区域远离所述外部电路接口的一侧。
  4. 根据权利要求1所述的触控显示面板，还包括第二多路复用器，所述第一多路复用器的输出端与第一触控走线电连接，所述第二多路复用器的输出端与第二触控走线电连接且所述第二多路复用器的输入端与外部电路接口电连接，其中，所述第一多路复用器的输入端和第二多路复用器的输入端分别电连接于外部电路接口的不同的通道。
  5. 根据权利要求4所述的触控显示面板，其中，所述周边区还包括弯折区域，所述第一多路复用器和第二多路复用器位于所述弯折区域与所述外部电路接口之间。
  6. 根据权利要求1至5中任一项所述的触控显示面板，其中，所述第一多路复用器的输入端包括多个输入通道且所述第一多路复用器的输出端包括多个输出通道，所述第一多路复用器还包括从同一个所述输入通道分别延伸至多个不同的所述输出通 道的多个支路，且在每个支路中设有控制开关。
  7. 根据权利要求6所述的触控显示面板，还包括控制电路，该控制电路配置成为所述控制开关提供控制信号。
  8. 根据权利要求1至5中任一项所述的触控显示面板，其中，所述第一触控电极和第二触控电极中的一者为驱动电极，另一者为感应电极，所述驱动电极和感应电极交替分布。
  9. 根据权利要求1至5中任一项所述的触控显示面板，其中，所述第一多路复用器的输入端包括多个输入通道且所述第一多路复用器的输出端包括多个输出通道，且所述第一多路复用器包括并行布置的多个复用组件，每个复用组件包括：
    主走线，所述主走线与所述多个输入通道中的对应的一个输入通道电连接；
    第一支路走线和第二支路走线，所述第一支路走线和第二支路走线与所述多个输出通道中的两个对应的输出通道分别电连接；
    第一控制信号线，所述第一控制信号线配置用于提供控制所述第一支路走线与主走线连通或断开的第一控制信号；以及
    第二控制信号线，所述第二控制信号线配置用于提供控制所述第二支路走线与主走线连通或断开的第二控制信号。
  10. 根据权利要求9所述的触控显示面板，还包括衬底基板，其中，每个复用组件包括：
    位于衬底基板上的有源层；
    位于所述有源层的背对所述衬底基板的一侧的第一绝缘层；
    位于所述第一绝缘层的背对所述衬底基板的一侧的第一导电层；
    位于所述第一导电层的背对所述衬底基板的一侧的第二绝缘层；以及
    位于所述第二绝缘层的背对所述衬底基板的一侧的第二导电层，且
    其中，所述第一控制信号线和所述第二控制信号线布设于所述第一导电层中，所述主走线、第一支路走线和第二支路走线布设于所述第二导电层中，所述主走线、第一支路走线和第二支路走线通过贯穿所述第一绝缘层和第二绝缘层的导电的贯通部与所述有源层连接。
  11. 根据权利要求10所述的触控显示面板，其中，在每个复用组件中，所述主走线在衬底基板上的正投影位于所述第一支路走线在衬底基板上的正投影和所述第二 支路走线在衬底基板上的正投影之间。
  12. 根据权利要求11所述的触控显示面板，其中，在每个复用组件中，所述第一控制信号线在衬底基板上的正投影位于所述第一支路走线在衬底基板上的正投影和所述主走线在衬底基板上的正投影之间，所述第二控制信号线在衬底基板上的正投影位于所述第二支路走线在衬底基板上的正投影和所述主走线在衬底基板上的正投影之间。
  13. 根据权利要求12所述的触控显示面板，其中，所述主走线、第一控制信号线和第一支路走线中每一者在衬底基板上的正投影与所述有源层在衬底基板上的正投影均具有重叠部分，且所述主走线、第二控制信号线和第二支路走线中每一者在衬底基板上的正投影与所述有源层在衬底基板上的正投影均具有重叠部分。
  14. 根据权利要求10所述的触控显示面板，其中，在所述第二导电层中还布设有：
    第一信号传输线，所述第一信号传输线通过贯穿所述第二绝缘层的导电的贯通部与各个复用组件中的第一控制信号线电连接；以及
    第二信号传输线，所述第二信号传输线通过贯穿所述第二绝缘层的导电的贯通部与各个复用组件中的第二控制信号线电连接。
  15. 根据权利要求10所述的触控显示面板，还包括：
    第三导电层，所述第三导电层位于第二绝缘层的背对所述衬底基板的一侧且位于所述第二导电层的朝向所述衬底基板的一侧；以及
    第四绝缘层，所述第四绝缘层位于所述第三导电层的远离衬底基板的一侧且位于所述第三绝缘层的朝向衬底基板的一侧，
    其中，所述第三导电层中设置有输入接线端，所述输入接线端经由透过第四绝缘层的过孔结构与主走线电连接。
  16. 一种电子设备，包括如权利要求1至15中任一项所述的触控显示面板。
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CN109494229A (zh) * 2017-09-12 2019-03-19 夏普株式会社 有源矩阵基板和多路分配电路
CN108281089A (zh) * 2018-03-29 2018-07-13 上海天马微电子有限公司 柔性显示面板和柔性显示装置
CN110187797A (zh) * 2019-05-31 2019-08-30 京东方科技集团股份有限公司 触控显示面板

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