CN113157136B - Touch substrate and display device - Google Patents

Touch substrate and display device Download PDF

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Publication number
CN113157136B
CN113157136B CN202110400290.9A CN202110400290A CN113157136B CN 113157136 B CN113157136 B CN 113157136B CN 202110400290 A CN202110400290 A CN 202110400290A CN 113157136 B CN113157136 B CN 113157136B
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Prior art keywords
touch
line
electrode
substrate
signal reading
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CN113157136A (en
Inventor
查宝
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—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

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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)
  • Position Input By Displaying (AREA)

Abstract

The embodiment of the invention discloses a touch substrate and a display device. The touch substrate comprises a substrate and a touch layer arranged on the substrate; the touch layer comprises a plurality of touch units and a plurality of optical units, wherein each touch unit comprises a touch transmitting electrode, and each optical unit comprises a signal reading line; in the extending direction of the signal reading line, an orthographic projection of the signal reading line on the touch-control emitting electrode and the touch-control emitting electrode have at least one intersection point. According to the embodiment of the invention, by reducing the intersection point or the overlap between the touch transmitting electrode and the signal reading line, the parasitic capacitance between the touch transmitting electrode and the signal reading line can be effectively reduced, so that the crosstalk problem between the light-operated sensor and the touch sensor is effectively improved, the signal-to-noise ratio is improved, the light-operated sensor and the touch sensor work independently or simultaneously, and the functions of short-range touch control and long-range light control are realized.

Description

Touch substrate and display device
Technical Field
The invention relates to the field of display, in particular to a touch substrate and a display device.
Background
In recent years, the light control sensor and the touch sensor are synchronously integrated, so that the touch substrate is thinned. However, for the touch substrate that is currently integrated with the light control sensor and the touch sensor synchronously, when the light control sensor and the touch sensor work simultaneously, parasitic capacitance is easily generated between the transmitting wire of the touch sensor and the signal reading line of the light control sensor, which causes signal crosstalk, and affects the working performance of the touch substrate.
Therefore, a touch substrate and a display device are needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the invention provides a touch substrate and a display device, which can solve the problem that in recent years, a light control sensor and a touch sensor are synchronously integrated, so that the touch substrate is thin. However, for the touch substrate that is currently integrated with the light control sensor and the touch sensor synchronously, when the light control sensor and the touch sensor work simultaneously, parasitic capacitance is easily generated between the transmitting wire of the touch sensor and the signal reading line of the light control sensor, which leads to signal crosstalk and affects the working performance of the touch substrate.
The embodiment of the invention provides a touch substrate, which comprises a substrate and a touch layer arranged on the substrate;
the touch layer comprises a plurality of touch units and a plurality of optical units, the touch units comprise touch transmitting electrodes, and the optical units comprise signal reading lines;
in the extending direction of the signal reading line, an orthogonal projection of the signal reading line on the touch transmitting electrode and the touch transmitting electrode have at least one intersection point.
In one embodiment, the orthographic projection of the touch transmitting electrode on the substrate is a grid line, and the orthographic projection of the signal reading line on the substrate is a fold line; the number of intersection points of the orthographic projection of the signal reading line on any corresponding touch emitting electrode and the corresponding touch emitting electrode is less than or equal to the number of edges of the grid lines of the touch emitting electrode in a first direction, and the first direction is parallel to the extending direction of the signal reading line.
In one embodiment, the touch-sensing transmission electrode includes a plurality of disconnection units, and the disconnection units correspond to the grid lines of the touch-sensing transmission electrode; the orthographic projection of the signal reading line on the touch control transmitting electrode passes through at least one breaking unit.
In an embodiment, any one of the disconnection units is one side of the grid line of the touch transmission electrode, the two disconnection units are connected, and a circuit of any one of the touch transmission electrodes is turned on.
In one embodiment, the signal reading line includes a plurality of first portions and a plurality of second portions, the first portions are straight lines, the second portions are broken lines, and the first portions connect two adjacent second portions; wherein an orthographic projection of the first portion on the touch transmission electrode is located within the grid lines.
In one embodiment, the orthographic projection of the second portion on the touch transmission electrode is located outside the grid lines; the first portion comprises a first line segment, a second line segment and a third line segment which connects the first line segment and the second line segment, wherein the orthographic projection of the third line segment on the touch-control emitting electrode is positioned in the grid line, and the orthographic projection of the first line segment and the orthographic projection of the second line segment on the touch-control emitting electrode are positioned outside the grid line.
In one embodiment, the touch substrate includes a first metal layer on the substrate and a second metal layer on the first metal layer; the first metal layer comprises the touch transmitting electrode, a gate line and a first common electrode line, and the second metal layer comprises a touch sensing electrode, the signal reading line and a second common electrode line; the touch emitting electrode and the touch sensing electrode are arranged in a crossed mode, and the first public electrode wire and the second public electrode wire are arranged in a crossed mode.
In one embodiment, the touch substrate includes a plurality of first regions and a plurality of second regions; the crossing position of the touch sensing electrode and the touch transmitting electrode is positioned in the first area, the touch unit is positioned in the first area, the middle position surrounded by the touch sensing electrode and the touch transmitting electrode corresponds to the second area, and the optical unit is positioned in the second area.
In one embodiment, the optical unit comprises a switch transistor, a photosensitive transistor and a storage capacitor; a first gate of the switching transistor is electrically connected to the gate line, a first source of the switching transistor is electrically connected to the signal reading line, a first drain of the switching transistor is electrically connected to a second source of the photosensitive transistor, a second drain of the photosensitive transistor is electrically connected to the second common electrode line, a second gate of the photosensitive transistor is electrically connected to the first common electrode line, and the first drain and the first common electrode line form the storage capacitor.
The embodiment of the invention also provides a display device which comprises any one of the touch substrates.
According to the embodiment of the invention, by reducing the intersection point or the overlap between the touch transmitting electrode and the signal reading line, the parasitic capacitance between the touch transmitting electrode and the signal reading line can be effectively reduced, so that the crosstalk problem between the light-operated sensor and the touch sensor is effectively improved, the signal-to-noise ratio is improved, the light-operated sensor and the touch sensor work independently or simultaneously, and the functions of short-range touch control and long-range light control are realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first structure of a touch substrate according to an embodiment of the invention;
fig. 2 is a schematic circuit structure diagram of a touch substrate according to an embodiment of the invention;
fig. 3 is a schematic top view illustrating a second structure of a touch substrate according to an embodiment of the invention;
fig. 4 is a schematic partial top view illustrating a third structure of a touch substrate according to an embodiment of the invention;
fig. 5 is a schematic partial top view illustrating a fourth structure of a touch substrate according to an embodiment of the invention;
fig. 6 is a schematic top view of a portion of a fifth structure of a touch substrate according to an embodiment of the invention;
fig. 7 is a schematic top view of a part of a sixth structure of a touch substrate according to an embodiment of the invention;
fig. 8 is a schematic partial top view illustrating a seventh structure of a touch substrate according to an embodiment of the invention;
fig. 9 is a schematic partial top view illustrating an eighth structure of a touch substrate according to an embodiment of the invention;
fig. 10 is a schematic structural diagram of a ninth structure of a touch substrate according to an embodiment of the invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In recent years, the light control sensor and the touch sensor are synchronously integrated, so that the touch substrate is thinned. However, for the touch substrate that is currently integrated with the light control sensor and the touch sensor synchronously, when the light control sensor and the touch sensor work simultaneously, parasitic capacitance is easily generated between the transmitting wire of the touch sensor and the signal reading line of the light control sensor, which leads to signal crosstalk and affects the working performance of the touch substrate.
Referring to fig. 1 to 10, an embodiment of the invention provides a touch substrate 100, including a substrate 200 and a touch layer disposed on the substrate 200;
the touch layer includes a plurality of touch units including touch transmitting electrodes 310 and a plurality of optical units including signal reading lines 530;
in the extending direction of the signal reading line 530, an orthogonal projection of the signal reading line 530 on the touch-sensing transmitting electrode 310 has at least one intersection with the touch-sensing transmitting electrode 310.
According to the embodiment of the invention, by reducing the intersection point or the overlap between the touch transmitting electrode and the signal reading line, the parasitic capacitance between the touch transmitting electrode and the signal reading line can be effectively reduced, so that the crosstalk problem between the light-operated sensor and the touch sensor is effectively improved, the signal to noise ratio is improved, the light-operated sensor and the touch sensor work independently or simultaneously, and the functions of short-range touch control and long-range light control are realized.
The technical solution of the present invention will now be described with reference to specific embodiments.
The touch substrate 100 includes a substrate 200 and a touch layer disposed on the substrate 200; the touch layer includes a plurality of touch units including touch transmitting electrodes 310 and a plurality of optical units 600 including signal reading lines 530; in the extending direction of the signal reading line 530, an orthogonal projection of the signal reading line 530 on the touch-sensing transmitting electrode 310 has at least one intersection with the touch-sensing transmitting electrode 310. This structure can reduce the first parasitic capacitance 520 between the signal readout lines 530 of the touch transmitting electrode 310, as shown in fig. 1 and 2.
In fig. 1 to 10, all the padding is only for distinguishing different film layers or different wires, and does not indicate a specific structure in the wires, for example, in the marked area B of fig. 3, only three complete grids of one touch sensing electrode 510 are included, which is described herein.
In this embodiment, the intersection region of the signal reading line 530 and the touch transmitting electrode 310 corresponds to a third region G, wherein fig. 4 to 9 are enlarged schematic views of the third region G, for convenience of composition and no congestion, it can be understood that, for example, fig. 4 shows a region occupied by 13 grids, and fig. 5 to 9 are similar.
In this embodiment, the orthographic projection of the touch transmitting electrode 310 on the substrate 200 is a grid line, and the orthographic projection of the signal reading line 530 on the substrate 200 is a broken line; the number of intersections between the orthographic projection of the signal reading line 530 on any corresponding touch transmitting electrode 310 and the corresponding touch transmitting electrode 310 is less than or equal to the number of edges of the grid lines of the touch transmitting electrode 310 in a first direction, and the first direction is parallel to the extending direction of the signal reading line 530, please refer to fig. 3 specifically.
In this embodiment, the touch-sensing transmission electrode 310 includes a plurality of breaking units a, and the breaking units a correspond to the grid lines of the touch-sensing transmission electrode 310; the orthogonal projection of the signal reading line 530 on the touch transmitting electrode 310 passes through at least one of the disconnection units a, please refer to fig. 5 specifically. The breaking unit a may be a first segment of an edge of the grid line, and the first segment corresponds to the signal reading line 530, so that there is no parasitic capacitance between the signal reading line 530 and the touch emitting electrode 310 at the breaking unit a (i.e., the first segment), and the inherent capacitance between the signal reading line 530 and the touch emitting electrode 310 is improved, and the overall parasitic capacitance between the signal reading line 530 and the touch emitting electrode 310 is reduced, thereby effectively improving the crosstalk problem between the optical unit 600 and the touch unit, so as to improve the signal-to-noise ratio, and enable the optical unit 600 and the touch unit to work independently or simultaneously, thereby implementing functions of short-range touch control and long-range light control.
In this embodiment, any one of the disconnection units a is an edge of the grid line of the touch transmission electrode 310, two of the disconnection units a are connected, and a circuit of any one of the touch transmission electrodes 310 is turned on, as shown in fig. 6. One of the breaking units a occupies one side of the grid lines of the touch-sensing transmitting electrode 310, one side is a first blank side, that is, the whole side is broken, and both sides are in a broken state, so that the projected capacitance between the signal reading line 530 and the touch-sensing transmitting electrode 310 can be reduced, and the parasitic capacitance between the signal reading line 530 and the touch-sensing transmitting electrode 310 as a whole can be reduced, thereby effectively improving the crosstalk problem between the optical unit 600 and the touch-sensing unit, so as to improve the signal-to-noise ratio, so that the optical unit 600 and the touch-sensing unit can work independently or simultaneously, and the functions of short-range touch sensing and long-range light control can be realized. The circuit conduction of any touch transmitting electrode 310 ensures that the touch transmitting electrode 310 is not disconnected and keeps the electric signal smooth. In fig. 6, the transmission capacitances of the three structures (a), (b), and (c) are gradually reduced, and the number of intersections between the orthographic projection of any one of the signal reading lines 530 on any one of the corresponding touch-sensing transmission electrodes 310 and the corresponding touch-sensing transmission electrode 310 is also reduced from 3 to 1.
In this embodiment, the number of the intersection points of the orthographic projection of any one of the signal reading lines 530 on any corresponding one of the touch-sensing transmission electrodes 310 and the corresponding touch-sensing transmission electrode 310 is 1 to 4. The disconnecting unit a may also be located at any one or more corresponding positions in D, E, F, specifically referring to fig. 5 and 6, the grid lines of the touch transmitting electrode 310 may be in a diamond shape, so as to utilize space more efficiently, and control the projection contact point of the signal reading line 530 on the touch transmitting electrode 310, thereby reducing the parasitic capacitance between the two, thereby effectively improving the crosstalk problem between the optical unit 600 and the touch unit, so as to improve the signal-to-noise ratio, so that the optical unit 600 and the touch unit operate independently or simultaneously, and implement short-range touch control and long-range light control.
In this embodiment, the signal reading line 530 includes a plurality of first portions 910 and a plurality of second portions 920, the first portions 910 are straight lines, the second portions 920 are broken lines, and the first portions 910 connect two adjacent second portions 920; the orthographic projection of the first portion 910 on the touch transmitting electrode 310 is located within the grid lines, please refer to fig. 7. The first portion 910 and the second portion 920 are periodically arranged, and the projection of the first portion 910 corresponding to the grid lines is a straight line, so that the projected capacitance can be reduced as much as possible, and meanwhile, the straight line can also reduce the intersection point between the signal reading line 530 and the touch transmitting electrode 310, and reduce the inherent capacitance, thereby effectively improving the crosstalk problem between the optical unit 600 and the touch unit, so as to improve the signal-to-noise ratio, so that the optical unit 600 and the touch unit can work independently or simultaneously, and the functions of short-range touch and long-range light control can be realized.
In this embodiment, the orthographic projection of the second portion 920 on the touch transmission electrode 310 is located outside the grid lines; the first portion 910 includes a first line segment 911, a second line segment 912, and a third line segment 913 connecting the first line segment 911 and the second line segment 912, wherein orthographic projections of the third line segment 913 on the touch-sensing transmitting electrode 310 are located within the grid lines, and orthographic projections of the first line segment 911 and the second line segment 912 on the touch-sensing transmitting electrode 310 are located outside the grid lines, as shown in fig. 8. That is, the signal reading lines 530 corresponding to the grid lines are all straight lines, so that the projected capacitance is minimized, the intersection point between the signal reading line 530 and the touch transmitting electrode 310 can reach 1 point, and the touch transmitting electrode 310 and the corresponding signal reading line 530 intersect at one point, specifically referring to fig. 9, in cooperation with the straight line projection, the inherent capacitance is also minimized, so as to maximize the improvement of the crosstalk problem between the optical unit 600 and the touch unit, so as to improve the signal-to-noise ratio, so that the optical unit 600 and the touch unit can work independently or simultaneously, thereby achieving the functions of short-range touch control and long-range light control.
In this embodiment, the touch substrate 100 includes a first metal layer on the substrate 200 and a second metal layer on the first metal layer; the first metal layer includes a plurality of touch transmitting electrodes 310, a plurality of gate lines 320, and a plurality of first common electrode lines 330, and the second metal layer includes a plurality of touch sensing electrodes 510, a plurality of signal reading lines 530, and a plurality of second common electrode lines 570; the touch transmitting electrode 310 and the touch sensing electrode 510 are arranged in a crossing manner, and the first common electrode line 330 and the second common electrode line 570 are arranged in a crossing manner. The first common electrode line 330 may be an SVGG line, and the second common electrode line 570 may be an SVDD line.
In the present embodiment, the touch substrate 100 further includes a first insulating layer 400 between the first metal layer and the second metal layer, specifically referring to fig. 10.
In this embodiment, the touch substrate 100 includes a plurality of first regions 810 and a plurality of second regions 820; the crossing position of the touch sensing electrode 510 and the touch transmitting electrode 310 is located in the first area 810, the touch unit is located in the first area 810, the middle position surrounded by the touch sensing electrode 510 and the touch transmitting electrode 310 corresponds to the second area 820, and the optical unit 600 is located in the second area 820, please refer to fig. 3 specifically. The touch sensing electrodes 510 and the touch transmitting electrodes 310 are arranged periodically, and in each period, the optical unit 600 is located in the second area 820, i.e., the central portion, while the touch sensing units are located in the first area 810, i.e., the vertex portions around the square, and the unmarked area is a virtual area. The structure arrangement can make full use of space, and the space can be used for realizing the light control function while realizing the touch control function.
In this embodiment, the optical unit 600 includes a switch transistor 610, a light sensing transistor 620, and a storage capacitor C; the first gate 321 of the switch transistor 610 is electrically connected to the gate line 320, the first source 541 of the switch transistor 610 is electrically connected to the signal reading line 530, the first drain 551 of the switch transistor 610 is electrically connected to the second source 542 of the photo transistor 620, the second drain 552 of the photo transistor 620 is electrically connected to the second common electrode line 570, the second gate 322 of the photo transistor 620 is electrically connected to the first common electrode line 330, and the first drain 551 and the first common electrode line 330 form the storage capacitor C, which is specifically shown in fig. 2. The optical unit 600 may include 2T1C or 3T1C or 4T1C or 5T1C, which may not be limited.
In this embodiment, the switch transistor 610 further includes a first active unit 561, the photosensitive transistor 620 further includes a second active unit 562, the first active unit 561 is located between the first gate 321 and the first source 541 and the first drain 551, the second active unit 562 is located between the second gate 322 and the second source 542 and the second drain 552, and the material of the first active unit 561 and/or the second active unit 562 includes hydrogenated amorphous silicon, which is specifically shown in fig. 1 and 10. For example, in 2T1C, the active units in 2T, that is, the materials of the light sensing transistor 620 and/or the switching transistor 610, all include hydrogenated amorphous silicon, which can improve the light sensing and reaction efficiency of the optical unit 600 and improve the working performance of the touch substrate 100.
In this embodiment, the SVDD line and the SVGG line may be electrically connected through a via hole. The voltage stabilization and the reduction of the wire resistance are facilitated.
In this embodiment, the voltage of the touch transmitting electrode 310 fluctuates between 0V and 30V with a certain frequency spectrum, wherein the touch sensing electrode 510 is in a fluctuation state. The SVDD line and the SVGG line are both fixed voltages, and the voltage range of the SVDD line and the SVGG line can be-10V. The voltage range of the gate line 320 is-15V to 15V.
In this embodiment, the orthographic projection of the touch-sensing transmitting electrode 310 on the display panel is a grid line, and the orthographic projection of the signal reading line 530 on the display panel is a broken line, please refer to fig. 3 specifically. In the grid lines of the touch transmission electrode 310, there are a honeycomb shape, a diamond shape, a rectangle shape, etc., which are not limited herein.
In this embodiment, the touch substrate 100 further includes a protection layer 700 on the touch layer and a plurality of light-shielding units 740 on the protection layer 700, where the light-shielding units 740 are disposed corresponding to the switch transistors 610, as shown in fig. 10.
In this embodiment, the protection layer 700 includes a first layer 710 and a second layer 720 located on the first layer 710, specifically referring to fig. 10, the first layer 710 is made of an inorganic material, such as silicon nitride or silicon oxide, and the second layer 720 is made of an organic material.
In this embodiment, the protection layer 700 includes a plurality of first via holes 730, and the first via holes 730 penetrate the protection layer 700 and expose the second source 542 or the second drain 552. The touch substrate 100 further includes an electrode line 750 on the protection layer 700, where the electrode line 750 is used to connect a fan-out trace, as shown in fig. 10.
According to the embodiment of the invention, by reducing the intersection point or the overlap between the touch transmitting electrode and the signal reading line, the parasitic capacitance between the touch transmitting electrode and the signal reading line can be effectively reduced, so that the crosstalk problem between the light-operated sensor and the touch sensor is effectively improved, the signal-to-noise ratio is improved, the light-operated sensor and the touch sensor work independently or simultaneously, and the functions of short-range touch control and long-range light control are realized.
Referring to fig. 11, an embodiment of the invention further provides a display device 10 including any one of the touch substrates 100 described above.
The technical solution of the present invention will now be described with reference to specific embodiments.
In this embodiment, please refer to any one of the embodiments of the touch substrate 100 and fig. 1 to 10 for describing the structure of the touch substrate 100, which is not described herein again.
In this embodiment, the display device 10 further includes a display panel 20 located on a side of the touch substrate 100 close to the substrate 200, and an adhesive layer 30 located between the touch substrate 100 and the display panel 20, as shown in fig. 10. The material of the adhesive layer 30 may be an optical adhesive layer, that is, the touch substrate 100 and the display panel 20 may be adhered to each other, and the optical adhesive layer is transparent, so that the light transmittance of the entire display device 10 may be improved.
In this embodiment, the type of the display panel 20 may be any one of liquid crystal, OLED, QLED, mini-LED, and Micro-LED.
In this embodiment, when the display panel 20 is a liquid crystal display panel 20, the structure includes a backlight module, an array substrate, a liquid crystal layer, and a color film layer. The liquid crystal display panel 20 may be a COA or Non-COA structure, and the display mode thereof may be VA, IPS, TN, FFS, or the like.
In this embodiment, when the display panel 20 is of another type, the structure includes an array substrate and a light emitting functional layer. The light-emitting functional layer comprises any one of organic light-emitting materials, quantum dot light-emitting materials, mini-LEDs and Micro-LEDs.
In this embodiment, the display device 10 includes an encapsulation layer 40 on the display touch substrate 100, an OCA glue layer on the encapsulation layer 40, and a cover plate layer 50 on the OCA glue layer, as shown in fig. 10.
In this embodiment, the cover board layer 50 may be a flexible cover board layer 50. The flexible cover plate layer 50 can cope with usage scenarios such as bending, curling and the like, and the service life of the display device 10 is prolonged.
According to the embodiment of the invention, by reducing the intersection point or the overlap between the touch transmitting electrode and the signal reading line, the parasitic capacitance between the touch transmitting electrode and the signal reading line can be effectively reduced, so that the crosstalk problem between the light-operated sensor and the touch sensor is effectively improved, the signal-to-noise ratio is improved, the light-operated sensor and the touch sensor work independently or simultaneously, and the functions of short-range touch control and long-range light control are realized.
The embodiment of the invention discloses a touch substrate and a display device. The touch substrate comprises a substrate and a touch layer arranged on the substrate; the touch layer comprises a plurality of touch units and a plurality of optical units, wherein the touch units comprise touch transmitting electrodes, and the optical units comprise signal reading lines; in the extending direction of the signal reading line, an orthographic projection of the signal reading line on the touch-control emitting electrode and the touch-control emitting electrode have at least one intersection point. According to the embodiment of the invention, by reducing the intersection point or the overlap between the touch transmitting electrode and the signal reading line, the parasitic capacitance between the touch transmitting electrode and the signal reading line can be effectively reduced, so that the crosstalk problem between the light-operated sensor and the touch sensor is effectively improved, the signal-to-noise ratio is improved, the light-operated sensor and the touch sensor work independently or simultaneously, and the functions of short-range touch control and long-range light control are realized.
The touch substrate and the display device provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by applying specific examples, and the description of the embodiments is only used to help understanding the method and the core concept of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (9)

1. A touch substrate is characterized by comprising a substrate and a touch layer arranged on the substrate;
the touch layer comprises a plurality of touch units and a plurality of optical units, the touch units comprise touch transmitting electrodes, and the optical units comprise signal reading lines;
in an extending direction of the signal reading lines, an orthographic projection of one signal reading line on the touch transmitting electrode and the touch transmitting electrode have at least one intersection point, the orthographic projection of the touch transmitting electrode on the substrate is a grid line, and the orthographic projection of the signal reading line on the substrate is a fold line, wherein the number of the intersection points of the orthographic projection of the signal reading line on any corresponding touch transmitting electrode and the corresponding touch transmitting electrode is less than or equal to the number of edges of the grid line of the touch transmitting electrode in a first direction, and the first direction is parallel to the extending direction of the signal reading line.
2. The touch substrate of claim 1, wherein the touch transmitting electrode comprises a plurality of breaking units, and the breaking units correspond to the grid lines of the touch transmitting electrode;
the orthographic projection of the signal reading line on the touch transmitting electrode penetrates through at least one breaking unit.
3. The touch substrate of claim 2, wherein any one of the disconnection units is an edge of the grid line of the touch transmission electrode, two of the disconnection units are connected, and a circuit of any one of the touch transmission electrodes is turned on.
4. The touch substrate of claim 1, wherein the signal readout line comprises a plurality of first portions and a plurality of second portions, the first portions are straight lines, the second portions are broken lines, and the first portions connect two adjacent second portions;
wherein an orthographic projection of the first portion on the touch transmission electrode is located within the grid lines.
5. The touch substrate of claim 4, wherein an orthographic projection of the second portion on the touch transmitting electrode is outside the grid lines;
the first portion comprises a first line segment, a second line segment and a third line segment which connects the first line segment and the second line segment, wherein the orthographic projection of the third line segment on the touch-control emitting electrode is positioned in the grid line, and the orthographic projection of the first line segment and the orthographic projection of the second line segment on the touch-control emitting electrode are positioned outside the grid line.
6. The touch substrate of any one of claims 1 to 5, wherein the touch substrate comprises a first metal layer on the substrate and a second metal layer on the first metal layer;
the first metal layer comprises the touch transmitting electrode, a gate line and a first common electrode line, and the second metal layer comprises a touch sensing electrode, the signal reading line and a second common electrode line;
the touch emitting electrode and the touch sensing electrode are arranged in a crossed mode, and the first public electrode wire and the second public electrode wire are arranged in a crossed mode.
7. The touch substrate of claim 6, wherein the touch substrate comprises a plurality of first areas and a plurality of second areas;
the crossing position of the touch sensing electrode and the touch transmitting electrode is positioned in the first area, the touch unit is positioned in the first area, the middle position surrounded by the touch sensing electrode and the touch transmitting electrode corresponds to the second area, and the optical unit is positioned in the second area.
8. The touch substrate of claim 6, wherein the optical unit comprises a switching transistor, a light sensing transistor and a storage capacitor;
a first gate of the switching transistor is electrically connected to the gate line, a first source of the switching transistor is electrically connected to the signal reading line, a first drain of the switching transistor is electrically connected to a second source of the photosensitive transistor, a second drain of the photosensitive transistor is electrically connected to the second common electrode line, a second gate of the photosensitive transistor is electrically connected to the first common electrode line, and the first drain and the first common electrode line form the storage capacitor.
9. A display device comprising the touch substrate according to any one of claims 1 to 8.
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