CN113407056A - Touch control function film layer and display panel - Google Patents

Touch control function film layer and display panel Download PDF

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Publication number
CN113407056A
CN113407056A CN202110673979.9A CN202110673979A CN113407056A CN 113407056 A CN113407056 A CN 113407056A CN 202110673979 A CN202110673979 A CN 202110673979A CN 113407056 A CN113407056 A CN 113407056A
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China
Prior art keywords
touch
layer
main body
bridge
electrode
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Granted
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CN202110673979.9A
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Chinese (zh)
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CN113407056B (en
Inventor
窦玉乐
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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

Abstract

The application discloses touch-control function rete and display panel, touch-control function rete includes: the touch electrode layer comprises a plurality of touch electrode units; the bridge-crossing connecting layer is stacked with the touch electrode layer and is arranged in an insulating mode through the insulating layer, the bridge-crossing connecting layer comprises a plurality of bridge electrodes, each bridge electrode comprises a main body portion and an extending portion connected with at least one end of the main body portion in an intersecting mode, at least part of touch electrode units in the touch electrode units are electrically connected through the bridge electrodes, and the bridge electrodes are connected with the touch electrode units through holes through the extending portions. The bridge electrode structure can increase the width of a bridge hole of a bridge electrode and increase the width of wires allowed on or under the bridge.

Description

Touch control function film layer and display panel
Technical Field
The application relates to the technical field of display, in particular to a touch function film layer and a display panel.
Background
In recent years, touch technology is more and more widely applied to display devices of various sizes, and as a display panel of a novel human-computer interaction input mode, a touch screen is simpler, more direct and more convenient to input compared with the traditional modes of a display, a keyboard and a mouse.
In order to realize the touch function of the display device, it is generally necessary to introduce touch electrodes into the display device, and in some cases, different touch electrodes need to be electrically connected through a bridge electrode. However, at the bridging position where the touch electrodes are connected, due to the limitation of pixel distribution and bridging parts, the span of the bridge hole is small, and the width of the wiring on the bridge or under the bridge is obviously limited.
Disclosure of Invention
The embodiment of the application provides a touch control function film layer and a display panel.
In a first aspect, an embodiment of the present application provides a touch functional film layer, including: touch-control function rete includes: the touch electrode layer comprises a plurality of touch electrode units; the bridge-crossing connecting layer is stacked with the touch electrode layer and is arranged in an insulating mode through the insulating layer, the bridge-crossing connecting layer comprises a plurality of bridge electrodes, each bridge electrode comprises a main body portion and an extending portion connected with at least one end of the main body portion in an intersecting mode, at least part of touch electrode units in the touch electrode units are electrically connected through the bridge electrodes, and the bridge electrodes are connected with the touch electrode units through holes through the extending portions.
According to any implementation manner of the first aspect of the present application, the extension portion includes a first connection beam, one end of the main body portion, which is connected to the extension portion, includes a first connection location, the first connection beam is connected to the first connection location through an end portion, and a location of the extension portion, which is connected to the touch electrode unit via hole, is located on the first connection beam.
According to any one of the foregoing embodiments of the first aspect of the present application, an end portion of the main body portion connected to the first connection beam is further connected to the touch electrode unit via.
According to any of the preceding embodiments of the first aspect of the present application, the longitudinal direction of the first connection beam is perpendicular to the longitudinal direction of the main body portion.
According to any one of the foregoing embodiments of the first aspect of the present application, the extension portion further includes a second connection beam, one end of the main body portion, to which the extension portion is connected, includes a second connection location, the first connection location and the second connection location are distributed on the periphery of the main body portion, the second connection beam is connected to the second connection location through an end portion, and the first connection beam and the second connection beam are respectively connected to the touch electrode unit through a via hole.
According to any of the preceding embodiments of the first aspect of the present application, the first and second connection beams are symmetrically arranged with respect to the main body portion.
According to any one of the preceding embodiments of the first aspect of the present application, the first connecting beam and the second connecting beam have the same length direction and are perpendicularly and crosswise connected with the main body portion.
According to any one of the preceding embodiments of the first aspect of the present application, the main body portion has a first central line, a length direction of the first central line is perpendicular to a length direction of the main body portion, the two ends of the main body portion are connected with the extending portions, and the two extending portions at the two ends of the main body portion are disposed in an anti-symmetric manner or a symmetric manner with respect to the first central line.
According to any of the foregoing embodiments of the first aspect of the present application, the plurality of touch electrode units are divided into a first touch electrode unit and a second touch electrode unit, the first touch electrode unit and the second touch electrode unit are insulated from each other, the plurality of first touch electrode units are arranged at intervals along a first direction, the plurality of second touch electrode units are arranged at intervals along a second direction, and the first direction and the second direction intersect each other; any two adjacent first touch electrode units are electrically connected through a bridge electrode, any two adjacent second touch electrode units are electrically connected through a first routing wire, at least part of the bridge electrodes is intersected with the first routing wire in the orthographic projection of the touch electrode layer, and the ratio of the size of the first routing wire in the first direction to the size of the bridge electrode in the first direction is larger than 0.3.
According to any of the preceding embodiments of the first aspect of the present application, a ratio of a dimension of the first trace in the first direction to a dimension of the bridge electrode in the first direction is 0.45 to 0.85.
According to any of the preceding embodiments of the first aspect of the present application, the ratio of the length of the extension portion to the length of the main body portion is from 0.075 to 0.24, and the ratio of the width of the extension portion to the width of the main body portion is from 0.8 to 1.2.
According to any one of the preceding embodiments of the first aspect of the present application, the length of the main body portion is 0.15mm to 0.20mm, the length of the extension portion is 0.015mm to 0.03mm, and the width of the main body portion and the extension portion is 0.004mm to 0.005 mm.
According to any of the foregoing embodiments of the first aspect of the present application, the length direction of the main portion of the bridge electrode is parallel to the first direction, and the extending direction of the first trace is parallel to the second direction.
According to any of the preceding embodiments of the first aspect of the present application, the first direction is perpendicular to the second direction.
In a second aspect, an embodiment of the present application provides a display panel, including: a display functional layer; the touch functional film layer is disposed on a light emitting side of the display functional layer, and the touch functional film layer is as described in any of the previous embodiments.
According to the foregoing embodiment of the second aspect of the present application, the display function layer includes a plurality of sub-pixels arranged in an array, and an orthogonal projection of the bridge electrode on the display function layer does not overlap with the sub-pixels.
According to any one of the foregoing embodiments of the second aspect of the present application, the display panel is an organic light emitting display panel, the display function layer includes a pixel circuit layer, an organic light emitting layer, and an encapsulation layer, which are sequentially disposed, and the touch control function film layer is located on one side of the encapsulation layer away from the organic light emitting layer.
According to any one of the foregoing embodiments of the second aspect of the present application, the display panel is a liquid crystal display panel, and the display function layer includes an array substrate, a liquid crystal layer, and a color film substrate, which are sequentially disposed; the touch control function film layer is positioned on one side of the color film substrate away from the liquid crystal layer.
The touch control function rete and display panel that this application embodiment provided, the touch control function rete includes touch electrode layer and strides the bridge articulamentum, touch electrode layer's at least partial touch electrode unit is connected through the bridge electrode electricity of striding the bridge articulamentum, set up the extension rather than crossing the connection in at least one end of the main part of bridge electrode, and make bridge electrode pass through extension and touch electrode unit through-hole connection, make under the certain circumstances of bridge electrode overall span, the bridge opening width of bridge electrode can increase, and then can increase the minimum interval between two touch electrode units of passing through the bridge electrode electricity connection.
It can be understood that, if the distance between two touch electrode units electrically connected by a bridge electrode is increased, the width of the trace allowed to pass between the two touch electrode units can be increased, and the trace impedance can be reduced.
Drawings
Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic structural diagram of a touch functional film layer according to an embodiment of the present disclosure;
FIG. 4 is an enlarged view of portion B of FIG. 3;
FIG. 5 is a cross-sectional view taken along line C-C of FIG. 4;
fig. 6 is a schematic structural diagram of a touch functional film layer according to another embodiment of the present disclosure;
FIG. 7 is an enlarged view of portion D of FIG. 6;
fig. 8 is a schematic partial structure diagram of a touch functional film layer according to an embodiment of the present disclosure;
fig. 9 is a schematic partial structure view of a bridge electrode of a touch functional film according to an embodiment of the present disclosure;
fig. 10 is a schematic partial structure view of a bridge electrode of a touch functional film according to another embodiment of the present disclosure;
FIG. 11 is a cross-sectional view taken along line E-E of FIG. 8;
fig. 12 is a schematic partial structure view of a bridge electrode of a touch functional film according to another embodiment of the present disclosure;
fig. 13 is a schematic partial structure view of a bridge electrode of a touch functional film according to yet another embodiment of the present disclosure;
fig. 14 is a schematic structural diagram of a bridge electrode of a touch functional film according to an embodiment of the present disclosure;
fig. 15 is a schematic structural diagram of a bridge electrode of a touch functional film according to another embodiment of the present disclosure;
fig. 16 is a schematic structural diagram of a bridge electrode of a touch functional film according to yet another embodiment of the present disclosure;
fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present application.
Description of reference numerals:
10-a display panel;
100-a display functional layer;
200-touch control function film layer;
201-bridging connection layer; 210-bridge electrode; 211-a body portion; c-a first median line; 212-an extension; 212 a-first connecting beam; 212 b-a second connecting beam;
202-an insulating layer;
203-a touch electrode layer; 230-touch electrode unit; 231-first touch electrode unit; 232-a second touch electrode unit; 233 — first trace.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
In recent years, touch technology is more and more widely applied to display devices of various sizes, and as a display panel of a novel human-computer interaction input mode, a touch screen is simpler, more direct and more convenient to input compared with the traditional modes of a display, a keyboard and a mouse.
In order to realize the touch function of the display device, it is generally necessary to introduce touch electrodes into the display device, and in some cases, different touch electrodes need to be electrically connected through a bridge electrode. However, at the bridging position connected by the touch electrode, the width of the wires on or under the bridge is limited by the span of the bridge, and the risk that the impedance of the wires is large and the whole channel impedance exceeds the driving capability of the chip exists.
In order to solve the above problems, embodiments of a touch functional film layer, a display panel and a display device are provided, and the following description will be made with reference to fig. 1 to 17.
An embodiment of the present application provides a Display panel, which may be an Organic Light Emitting Diode (OLED) Display panel, a Liquid Crystal Display (LCD) Display panel, and the like, and the present application is not limited thereto.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present disclosure; fig. 2 is a cross-sectional view taken along the line a-a in fig. 1.
The display panel 10 provided in the embodiment of the present application includes a touch functional film layer 200 and a display functional layer 100. The touch functional film 200 is disposed on the light emitting side of the display functional layer 100. The touch function of the display panel 10 is realized by the touch function film layer 200, and the display function of the display panel 10 is realized by the display function layer 100.
Optionally, the display panel 10 is an organic light emitting display panel, the display function layer 100 includes a pixel circuit layer, an organic light emitting layer, and an encapsulation layer, which are sequentially disposed, and the touch function layer may be located on a side of the encapsulation layer away from the organic light emitting layer.
The organic light emitting display panel 10 includes an organic light emitting layer, the organic light emitting layer can emit light of self-luminescence, and each pixel can project light of three primary colors of red, green and blue, so that the display effect of the organic light emitting display panel 10 is more vivid and full, the pixels of the organic light emitting display panel 10 work independently, the power consumption is low, the response speed is high, and the organic light emitting display panel 10 does not need to be provided with a backlight layer, which is beneficial to realizing a curved screen.
Optionally, the display panel 10 is a liquid crystal display panel, the display function layer 100 includes an array substrate, a liquid crystal layer, and a color film substrate, which are sequentially disposed, and the touch function layer may be located on a side of the color film substrate away from the liquid crystal layer.
Wherein, liquid crystal display panel 10 includes the liquid crystal layer, and the liquid crystal layer sets up the play plain noodles in a poor light, and the light and shade of the deflection control pixel point through liquid crystal in the array substrate control liquid crystal layer, and then control liquid crystal display panel 10 and show the pattern, and liquid crystal display panel 10 display effect is more natural, watches indefatigability for a long time, and is with low costs, longe-lived.
The touch functional film layer 200 includes a touch electrode layer 203 and a bridging connection layer 201, and the bridging connection layer 201 is stacked with the touch electrode layer 203 and is insulated by an insulating layer 202. The touch electrode layer 203 includes a plurality of touch electrode units 230. The cross-bridge connection layer 201 includes a plurality of bridge electrodes 210, and at least some of the touch electrode units 230 in the plurality of touch electrode units 230 are electrically connected through the bridge electrodes 210.
Optionally, in order to reduce the influence of the display function layer 100 on the touch function film layer 200 and prevent interference between the display function layer and the touch function film layer, the bridge electrode 210 may be disposed near the metal layer of the display function layer 100, and the touch electrode unit 230 may be disposed on a side of the bridge electrode 210 facing away from the display function layer 100.
The display function layer 100 may include a plurality of sub-pixels arranged in an array, and preferably, the bridge electrode 210 does not overlap with the sub-pixels in the orthographic projection of the display function layer 100. The bridge electrode 210 is mostly made of metal materials, the metal materials have good conductivity, but the light transmittance of the metal materials is poor, and the bridge electrode 210 and the sub-pixels are arranged in a staggered mode and are not overlapped, so that the influence of the bridge electrode 210 on the light emitting effect of the sub-pixels can be avoided.
The materials of the touch electrode unit 230 and the bridge electrode 210 are not particularly limited. As a preferred embodiment, the bridge electrode 210 may be made of a metal material with a relatively low resistance, such as molybdenum, so as to reduce the impedance of the bridge electrode 210; in order to prevent the touch electrode unit 230 from shielding the sub-pixels, the touch electrode unit 230 may be made of a transparent conductive material such as Indium Tin Oxide (ITO).
Fig. 3 is a schematic structural diagram of a touch functional film layer according to an embodiment of the present disclosure; FIG. 4 is an enlarged view of portion B of FIG. 3; fig. 5 is a cross-sectional view taken along the direction C-C in fig. 4. The boundary between the main body portion 211 and the extension portion 212 is shown in fig. 4 by a dotted line, the dotted line does not constitute a definition of the structure of the bridge electrode 210, and each portion of the bridge electrode 210 may be integrally provided.
The touch functional film layer 200 provided by the embodiment of the application includes a touch electrode layer 203 and a bridging connection layer 201, wherein the bridging connection layer 201 and the touch electrode layer 203 are stacked and are insulated by an insulating layer 202. The touch electrode layer 203 includes a plurality of touch electrode units 230. The cross-bridge connection layer 201 includes a plurality of bridge electrodes 210, and at least some of the touch electrode units 230 in the plurality of touch electrode units 230 are electrically connected through the bridge electrodes 210.
As shown in fig. 4 and 5, in some alternative embodiments, the bridge electrode 210 may include a main body portion 211 and an extension portion 212 intersecting and connecting with at least one end of the main body portion 211. At least some of the touch electrode units 230 in the plurality of touch electrode units 230 are electrically connected through the bridge electrode 210, and the bridge electrode 210 is connected with the touch electrode units 230 through vias by the extension portions 212.
According to the touch functional film layer 200 provided by the embodiment of the application, the extension portion 212 intersecting with the main body portion 211 of the bridge electrode 210 is disposed at least at one end of the main body portion 211, and the bridge electrode 210 is connected with the touch electrode units 230 through the extension portion 212, so that the width of the bridge hole of the bridge electrode 210 can be increased under the condition that the whole span of the bridge electrode 210 is fixed, and further the minimum distance between two touch electrode units 230 electrically connected through the bridge electrode 210 can be increased.
It can be understood that, if the distance between the two touch electrode units 230 electrically connected through the bridge electrode 210 is increased, the width of the trace allowed to pass between the two touch electrode units 230 can be increased, and the trace impedance can be reduced.
It should be noted that two electrically connected touch electrode units 230 may be electrically connected through one bridge electrode 210, or may be electrically connected through two or more bridge electrodes 210.
The size of the extension 212 is not particularly limited, and in some alternative embodiments, the ratio of the length of the extension 212 to the length of the main body 211 may be 0.075 to 0.24, and the width of the extension 212 may be the same as the width of the main body 211, so as to meet the requirement of via connection and reduce the influence of the extension 212 on the display effect.
Fig. 6 is a schematic structural diagram of a touch functional film layer according to another embodiment of the present disclosure; fig. 7 is an enlarged schematic view of a portion D in fig. 6.
In some optional embodiments, the touch electrode units 230 can be divided into first touch electrode units 231 and second touch electrode units 232, the first touch electrode units 231 are arranged at intervals along a first direction (X direction in the figure), the second touch electrode units 232 are arranged at intervals along a second direction (Y direction in the figure), and the first direction and the second direction intersect. Any two adjacent first touch electrode units 231 are electrically connected, any two adjacent second touch electrode units 232 are electrically connected, and the first touch electrode units 231 and the second touch electrode units 232 are insulated from each other. The display panel 10 may generate touch information based on a capacitance change between the first touch electrode unit 231 and the second touch electrode unit 232, thereby implementing a touch function.
The first direction and the second direction are arranged in various ways, and can be intersected at any preset angle. Preferably, the angle between the first direction and the second direction may be 90 degrees, i.e. the first direction is perpendicular to the second direction.
Optionally, in order to avoid short circuit between the first touch electrode units 231 and the second touch electrode units 232, any two adjacent first touch electrode units 231 may be electrically connected through the bridge electrode 210, any two adjacent second touch electrode units 232 may be electrically connected through the first wire 233, and the first wire 233 may be disposed on the same layer as the touch electrode layer 203.
Optionally, at least a portion of the first trace 233 passes through between two adjacent first touch electrode units 231, and there is an orthographic projection of the bridge electrode 210 on the touch electrode layer 203 intersecting the first trace 233.
According to the touch functional film layer 200 provided in the embodiment of the application, the extension portion 212 intersecting with the main portion 211 of the bridge electrode 210 is disposed at least one end of the main portion 211 of the bridge electrode 210, and the bridge electrode 210 is connected to the touch electrode unit 230 through the extension portion 212, so that the width of the bridge hole of the bridge electrode 210 can be increased, the distance between two adjacent first touch electrode units 231 can be increased, the width of the first trace 233 can be increased, and the impedance can be reduced.
It is understood that, in some alternative embodiments, the first touch electrode unit 231 may be a touch driving electrode and the second touch electrode unit 232 is a touch sensing electrode, or the first touch electrode unit 231 is a touch sensing electrode and the second touch electrode unit 232 is a touch driving electrode.
The touch driving electrodes and the touch sensing electrodes are electrically connected with the driving chip, the driving chip sends touch driving signals to the touch driving electrodes in a touch stage, when the touch sensing electrodes sense overall touch, the touch sensing signals are sent to the driving chip, and the driving chip judges touch positions according to the touch sensing signals, so that the touch function of the display panel 10 is realized.
In some alternative embodiments, the length direction of the main body portion 211 of the bridge electrode 210 may be parallel to the first direction, that is, parallel to the arrangement direction of the first touch electrode units 231, and the extending direction of the first traces 233 may be parallel to the second direction, that is, parallel to the arrangement direction of the second touch electrode units 232, so that the first touch electrode units 231 and the first touch electrode units 231 can be horizontally and vertically arranged, and the structure is simple and compact.
The size of the first trace 233 is not particularly limited in this application. In some alternative embodiments, to ensure the width of the first trace 233, the ratio of the dimension d1 of the first trace 233 in the first direction to the dimension d2 of the bridge electrode 210 in the first direction may be greater than 0.3. As a preferred embodiment, the ratio of the dimension d1 of the first trace 233 in the first direction to the dimension d2 of the bridge electrode 210 in the first direction may be between 0.45 and 0.85.
Fig. 8 is a schematic partial structure view of a bridge electrode of a touch functional film according to an embodiment of the present disclosure; fig. 9 is a schematic partial structure view of a bridge electrode of a touch functional film according to an embodiment of the present disclosure; fig. 10 is a schematic partial structure view of a bridge electrode of a touch functional film according to another embodiment of the present disclosure.
The specific structure of the extension portion 212 of the bridge electrode 210 is various, in some alternative embodiments, the extension portion 212 may include a first connection beam 212a, one end of the main body portion 211 connected to the extension portion 212 may include a first connection position, the first connection beam 212a is connected to the first connection position through an end portion, so that the first connection beam 212a is connected to one end of the main body portion 211 in an intersecting manner, and a via connection portion of the extension portion 212 and the touch electrode unit 230 is located on the first connection beam 212 a.
There are various ways of disposing the first connection beam 212a, and the length direction of the first connection beam 212a and the length direction of the main body portion 211 may be disposed to intersect at any predetermined angle. Alternatively, as shown in fig. 8, the length direction of the first connection beam 212a may be perpendicular to the length direction of the main body portion 211, that is, the included angle between the first connection beam 212a and the main body portion 211 is 90 °, and the width of the bridge hole may be further increased without increasing the overall span of the bridge electrode 210.
Alternatively, as shown in fig. 9 and 10, the included angle between the first connecting beam 212a and the main body portion 211 may also be an acute angle or an obtuse angle, which is also within the protection scope of the present application.
Fig. 11 is a cross-sectional view taken along the direction E-E in fig. 8.
In order to ensure the reliability of the electrical connection between the bridge electrode 210 and the touch electrode unit 230 and to increase the electrical connection area between the bridge electrode 210 and the touch electrode unit 230, the end of the main body portion 211 connected to the first connection beam 212a may be further connected to the touch electrode unit 230 by a via.
Fig. 12 is a schematic partial structure view of a bridge electrode of a touch functional film according to another embodiment of the present disclosure; fig. 13 is a schematic partial structure view of a bridge electrode of a touch functional film according to yet another embodiment of the present disclosure.
In some optional embodiments, the extension portion 212 may further include a second connection beam 212b, the end of the main body portion 211 connected to the extension portion 212 includes a second connection location, the first connection location and the second connection location are distributed on the peripheral side of the main body portion 211, the second connection beam 212b is connected to the second connection location through an end portion, so that the second connection beam 212b is connected to the end of the main body portion 211 in an intersecting manner, and meanwhile, the first connection beam 212a and the second connection beam 212b are respectively connected to the touch electrode unit 230 through a via hole.
The bridge electrode 210 is connected to the touch electrode unit 230 through the first connection beam 212a and the second connection beam 212b, so that the electrical connection area between the bridge electrode 210 and the touch electrode unit 230 can be ensured. At this time, the bridge electrode 210 may be electrically connected to the touch electrode unit 230 only through the extension portion 212, that is, the electrical connection portion between the bridge electrode 210 and the touch electrode unit 230 is entirely located in the extension portion 212, and the main body portion 211 is not directly connected to the touch electrode unit 230, which is more beneficial to increase the width of the bridge aperture of the bridge electrode 210.
Alternatively, the first and second connection beams 212a and 212b may be symmetrically disposed with respect to the body portion 211. Of course, the first connection beam 212a and the second connection beam 212b may also be disposed asymmetrically with respect to the main body portion 211, for example, the lengths of the first connection beam 212a and the second connection beam 212b may be different, and/or the included angle between the first connection beam 212a and the main body portion 211 may be different from the included angle between the second connection beam 212b and the main body portion 211, and is also within the protection scope of the present application.
Alternatively, the first connection beam 212a and the second connection beam 212b have the same length direction and are perpendicularly connected to the main body 211 in a crossing manner, so that the end of the bridge electrode 210 may have a T-shape.
Fig. 14 is a schematic structural diagram of a bridge electrode of a touch functional film according to an embodiment of the present disclosure;
fig. 15 is a schematic structural diagram of a bridge electrode of a touch functional film according to another embodiment of the present disclosure; fig. 16 is a schematic structural diagram of a bridge electrode of a touch functional film according to yet another embodiment of the present disclosure.
In some optional embodiments, the extension portions 212 are connected to both ends of the main body portion 211, and both ends of the bridge electrode 210 are connected to the touch electrode unit 230 through the extension portions 212, so that the bridge hole of the bridge electrode 210 can be widened toward both ends.
The body part 211 may have a first central line c, and a length direction of the first central line c is perpendicular to a length direction of the body part 211.
Alternatively, as shown in fig. 14, the two extending portions 212 located at both ends of the main body portion 211 may be disposed anti-symmetrically with respect to the first central line c. Alternatively, as shown in fig. 15 or 16, the two extending portions 212 at the two ends of the main body portion 211 may be symmetrically disposed about the first central line c.
In the present application, the shape of the main body portion 211 is not particularly limited. Alternatively, the orthographic projection of the main body portion 211 on the touch electrode layer 203 may be a strip shape having a certain width and extending linearly along a certain direction. Of course, the orthographic projection of the main body portion 211 on the touch electrode layer 203 may be a zigzag type or an arc type, and the like, and is also within the protection scope of the present application.
The shape of the first and second connection beams 212a and 212b is not particularly limited by the present application. Alternatively, the orthographic projections of the first connection beam 212a and the second connection beam 212b on the touch electrode layer 203 may be both strip shapes having a certain width and extending linearly along a certain direction, and the widths of the first connection beam 212a and the second connection beam 212b may be the same as the width of the main body portion 211.
To meet the requirement of via connection and reduce the influence of the first connection beam 212a on the display effect, optionally, the ratio of the length of the first connection beam 212a to the length of the main body portion 211 is 0.075 to 0.12, and the width of the first connection beam 212a is the same as the width of the main body portion 211. Alternatively, the ratio of the length of the second connection beam 212b to the length of the main body portion 211 is 0.075 to 0.12, and the width of the second connection beam 212b coincides with the width of the main body portion 211.
It will be appreciated that the size of the bridge electrode 210 cannot be too large to reduce the visibility of the bridge electrode 210, and the width of the bridge electrode 210 cannot be too small to reduce the impedance of the bridge electrode 210. The size of the bridge electrode 210 is not particularly limited, and in some alternative embodiments, the length of the main body portion 211 may be set between 0.15mm and 0.20mm, the length of the first and second connection beams 212a and 212b may be set between 0.015mm and 0.03mm, and the width of the main body portion 211 and the first and second connection beams 212a and 212b may be set between 0.004mm and 0.005 mm.
Based on the same inventive concept, the embodiment of the application also provides a display device. Fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present application.
As shown in fig. 17, the display device includes the display panel 10 according to any of the embodiments of the present invention, and therefore, the display device provided in the embodiment of the present invention has the technical effects of the technical solutions in any of the embodiments, and the structures and the explanations of the terms that are the same as or corresponding to the embodiments are not repeated herein. The display device provided by the embodiment of the invention can be a mobile phone shown in fig. 17, and can also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive and do not limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims (10)

1. A touch control functional film layer, comprising:
the touch electrode layer comprises a plurality of touch electrode units;
the bridge-crossing connecting layer is stacked on the touch electrode layer and is arranged in an insulating mode through an insulating layer, the bridge-crossing connecting layer comprises a plurality of bridge electrodes, each bridge electrode comprises a main body portion and an extending portion, at least one end of each extending portion is connected with at least one end of each main body portion in an intersecting mode, at least part of touch electrode units in the touch electrode units are electrically connected through the bridge electrodes, and the bridge electrodes are connected through the extending portions and the touch electrode units in a through hole mode.
2. The touch control functional film layer of claim 1, wherein the extension portion comprises a first connection beam, one end of the main body portion connected to the extension portion comprises a first connection position, the first connection beam is connected to the first connection position through an end portion, and a portion of the extension portion connected to the touch electrode unit via hole is located on the first connection beam;
preferably, an end of the main body connected to the first connection beam is further connected to the touch electrode unit via hole;
preferably, a longitudinal direction of the first connection beam is perpendicular to a longitudinal direction of the main body.
3. The touch control functional film layer of claim 2, wherein the extension portion further comprises a second connection beam, one end of the main body portion connected to the extension portion comprises a second connection position, the first connection position and the second connection position are distributed on the periphery of the main body portion, the second connection beam is connected to the second connection position through an end portion, and the first connection beam and the second connection beam are respectively connected to the touch control electrode unit via holes;
preferably, the first and second connection beams are symmetrically disposed about the main body portion;
preferably, the first connecting beam and the second connecting beam have the same length direction and are perpendicularly connected with the main body in an intersecting manner.
4. The touch control functional film according to claim 1, wherein the main body portion has a first central line, a length direction of the first central line is perpendicular to a length direction of the main body portion, the two ends of the main body portion are both connected with the extending portions, and the two extending portions at the two ends of the main body portion are disposed opposite to or symmetrically with respect to the first central line.
5. The touch-control functional film according to any one of claims 1 to 4, wherein the touch-control electrode units are divided into a first touch-control electrode unit and a second touch-control electrode unit, the first touch-control electrode unit and the second touch-control electrode unit are insulated from each other, the first touch-control electrode units are arranged at intervals along a first direction, the second touch-control electrode units are arranged at intervals along a second direction, and the first direction and the second direction intersect each other;
any two adjacent first touch electrode units are electrically connected through the bridge electrode, any two adjacent second touch electrode units are electrically connected through a first wire, at least part of the bridge electrodes is intersected with the first wire in the orthographic projection of the touch electrode layer, and the ratio of the size of the first wire in the first direction to the size of the bridge electrode in the first direction is larger than 0.3.
6. The touch-control functional film layer of claim 5, wherein a ratio of a dimension of the first trace in the first direction to a dimension of the bridge electrode in the first direction is 0.45 to 0.85;
preferably, the ratio of the length of the extension part to the length of the main body part is 0.075 to 0.24, and the width of the extension part is identical to the width of the main body part;
preferably, the length of the main body part is 0.15mm to 0.20mm, the length of the extension part is 0.015mm to 0.03mm, and the width of the main body part and the extension part is 0.004mm to 0.005 mm.
7. The touch-control functional film layer of claim 5, wherein a length direction of the main body portion of the bridge electrode is parallel to the first direction, and an extending direction of the first trace is parallel to the second direction;
preferably, the first direction is perpendicular to the second direction.
8. A display panel, comprising:
a display functional layer;
a touch functional film layer disposed on a light exit side of the display functional layer, the touch functional film layer being the touch functional film layer according to any one of claims 1 to 7.
9. The display panel according to claim 8, wherein the display function layer comprises a plurality of sub-pixels arranged in an array, and an orthographic projection of the bridge electrode on the display function layer is not overlapped with the sub-pixels.
10. The display panel according to claim 8, wherein the display panel is an organic light emitting display panel, the display function layer comprises a pixel circuit layer, an organic light emitting layer and an encapsulation layer, which are sequentially disposed, and the touch function film layer is located on a side of the encapsulation layer away from the organic light emitting layer; or
The display panel is a liquid crystal display panel, and the display function layer comprises an array substrate, a liquid crystal layer and a color film substrate which are sequentially arranged; the touch function film layer is located on one side, away from the liquid crystal layer, of the color film substrate.
CN202110673979.9A 2021-06-17 2021-06-17 Touch functional film layer and display panel Active CN113407056B (en)

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Publication number Priority date Publication date Assignee Title
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CN207780739U (en) * 2017-11-30 2018-08-28 云谷（固安）科技有限公司 A kind of touch panel and touch control display apparatus
CN207780740U (en) * 2017-11-30 2018-08-28 云谷（固安）科技有限公司 A kind of touch panel and touch control display apparatus
CN108897454A (en) * 2018-06-29 2018-11-27 武汉天马微电子有限公司 Touch panel and preparation method thereof, the display panel of integrated touch-control, display device
CN109710106A (en) * 2018-12-12 2019-05-03 武汉华星光电半导体显示技术有限公司 Touch panel and display device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120081333A1 (en) * 2010-10-01 2012-04-05 Optrex Corporation Touch panel
US20150362949A1 (en) * 2014-06-11 2015-12-17 Innolux Corporation Touch display device and touch substrate
CN207780739U (en) * 2017-11-30 2018-08-28 云谷（固安）科技有限公司 A kind of touch panel and touch control display apparatus
CN207780740U (en) * 2017-11-30 2018-08-28 云谷（固安）科技有限公司 A kind of touch panel and touch control display apparatus
CN108897454A (en) * 2018-06-29 2018-11-27 武汉天马微电子有限公司 Touch panel and preparation method thereof, the display panel of integrated touch-control, display device
CN109710106A (en) * 2018-12-12 2019-05-03 武汉华星光电半导体显示技术有限公司 Touch panel and display device

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