CN109947305A - Touch panel and preparation method thereof, touch display unit - Google Patents
Touch panel and preparation method thereof, touch display unit Download PDFInfo
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- CN109947305A CN109947305A CN201910238940.7A CN201910238940A CN109947305A CN 109947305 A CN109947305 A CN 109947305A CN 201910238940 A CN201910238940 A CN 201910238940A CN 109947305 A CN109947305 A CN 109947305A
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Abstract
The invention discloses touch panels and preparation method thereof, touch display unit.Specifically, the invention proposes a kind of touch panels, comprising: substrate, the substrate are divided into touch sensing area, and the cabling area positioned at touch sensing area periphery；The side of the substrate is arranged in touch control electrode, the touch control electrode；Antistatic metal layer, side of the substrate far from the touch control electrode is arranged in the antistatic metal layer, and the orthographic projection of the antistatic metal layer on the substrate is located in the cabling area；The side of the antistatic metal layer far from the substrate is arranged in insulating protective layer, the insulating protective layer, and the insulating protective layer has opening, and the orthographic projection of the opening on the substrate is located in the cabling area；Flexible circuit board, the flexible circuit board are electrically connected in the opening and the antistatic metal layer.Thus, it is possible to improve the antistatic effect of touch panel, and be conducive to the frame that narrows.
Description
Technical field
The present invention relates to display fields, and in particular, to touch panel and preparation method thereof, touch display unit.
Background technique
In recent years, touch screen is developed rapidly as one of the staple product for realizing human-computer interaction.Touch screen by
The resistance-type of early stage develops to the condenser type being commonly used, and capacitive touch screen is accurate, substantially improves touch effect
Fruit.Touch screen is typically mounted on portable electronic device and uses, such as mobile phone etc., and screen body Chang Huiyu clothes etc. rubs
It wipes, to make to shield on the surface of body with electrostatic charge.Capacitive touch screen is that touch function is realized by electrical effect, therefore
It is more sensitive for the electrical effect reaction for shielding body surface face, once having electrostatic charge on screen body surface face, and it cannot lead and remove in time, then can
Touch-control deviation is generated, prevents touch point from accurately being captured, influences the normal work of touch screen.
Thus, current touch panel and preparation method thereof, touch display unit still have much room for improvement.
Summary of the invention
The present invention be based on inventor couple on the fact that and problem discovery and understanding make:
Currently, the frame of touch screen also constantly reduces with the development trend of electronic equipment narrow frame, touch screen frame subtracts
After small, antistatic effect weakens, and is unable to quick release electrostatic charge, and the instantaneous pressure that static discharge (ESD) generates can puncture
Contact conductor and touch control electrode etc., cause short circuit, touch-control failure occur, and the touching of touch screen is even completely destroyed when serious
Control function.Therefore, if a kind of new touch panel can be proposed, can narrow frame and influences its antistatic property, will
Largely solve the above problems.
In view of this, in one aspect of the invention, the invention proposes a kind of touch panels.Implementation according to the present invention
Example, the touch panel includes: substrate, has touch sensing area on the substrate, and be located at touch sensing area periphery
Cabling area；The side of the substrate is arranged in touch control electrode, the touch control electrode；Antistatic metal layer, the antistatic gold
Belong to layer and side of the substrate far from the touch control electrode, and the positive throwing of the antistatic metal layer on the substrate are set
Shadow is located in the cabling area；Insulating protective layer, the insulating protective layer are arranged in the antistatic metal layer far from the base
The side of plate, the insulating protective layer have opening, and the orthographic projection of the opening on the substrate is located in the cabling area；
Flexible circuit board, the flexible circuit board are electrically connected in the opening and the antistatic metal layer.The touch panel as a result,
It is connected by adding antistatic metal layer in cabling area of the substrate far from touch control electrode side, and by it with flexible circuit board
(i.e. with the ground conductive of flexible circuit board), can avoid electrode damage, and not will increase the width in cabling area with quick release electrostatic
It spends (i.e. border width), the antistatic effect of touch panel not only can be improved, but also be conducive to the frame that narrows, promoted and use the touch
The visual effect of the product of panel.
According to an embodiment of the invention, the flexible circuit board includes first connecting portion and the second connecting portion, described
One interconnecting piece and touch control electrode electrical connection, the second connecting portion and antistatic metal layer electrical connection.This is soft as a result,
Property circuit board can be electrically connected respectively with antistatic metal layer and touch control electrode, further improve the use of the touch panel
Performance.
According to an embodiment of the invention, the orthographic projection and the second connecting portion of the first connecting portion on the substrate
Orthographic projection on the substrate is not overlapped.It is electric with antistatic metal layer and touch-control respectively convenient for the flexible circuit board as a result,
Pole electrical connection, and will not influence each other and interfere, further improve the service performance of the touch panel.
According to an embodiment of the invention, the edge of the orthographic projection of the first connecting portion on the substrate and described second
The distance at the edge of the orthographic projection of interconnecting piece on the substrate is not less than 20 μm.As a result, convenient for the flexible circuit board respectively and
The binding of touch control electrode and antistatic metal layer is bonded, and further improves the service performance of the touch panel.
According to an embodiment of the invention, the most narrow spacing between the edge of the antistatic metal layer and the edge of the substrate
From for 0.08-0.15mm.Thus, it is possible to which the defects of avoiding substrate outer peripheral crackle causes the generation of antistatic metal layer to split
Line, and the width of the antistatic metal layer can be made as big as possible, the further high service performance of the touch panel.
According to an embodiment of the invention, having binding region in the cabling area, the touch panel further comprises: more
A contact conductor, the contact conductor are located in the cabling area, and the contact conductor is connected and extends with the touch control electrode
To in the binding region；Ground line, the ground line are located in the cabling area, and the ground line and the touch control electrode are same
Layer is arranged and extends in the binding region, wherein the ground line is located at the periphery of the contact conductor.As a result, into one
Step improves the service performance of the touch panel.
According to an embodiment of the invention, the width of the ground line is not more than 25 μm.The width of the ground line can be with as a result,
It is smaller, and will not influence the antistatic property of the touch panel, be conducive to the frame that narrows.
In another aspect of this invention, the invention proposes a kind of methods for preparing mentioned-above touch panel.According to
The embodiment of the present invention, this method comprises: providing substrate；Pass through the first patterning processes in the side of the substrate, forms touch-control
Electrode；In side evaporation metal of the substrate far from the touch control electrode, and pass through the second patterning processes, forms antistatic gold
Belong to layer；Insulating protective layer is formed far from the side of the substrate in the antistatic metal layer, and is protected in the insulation of formation
Opening is formed on sheath；Flexible circuit board is electrically connected in the opening and the antistatic metal layer.Party's legal system as a result,
Standby touch panel antistatic property is good, and is easy the frame that narrows.
According to an embodiment of the invention, the insulating protective layer is formed by transparent material, the insulating protective layer covers
Cover all surfaces of the antistatic metal layer and the substrate far from the touch control electrode.Thus, it is possible to simplify production work
Skill, and the service performance of prepared touch panel is not influenced.
In still another aspect of the invention, the invention proposes a kind of touch display units.According to an embodiment of the invention, institute
Stating touch display unit includes: mentioned-above touch panel；Display module, the display module and touch panel patch
It closes, the display module includes at least one of liquid crystal display, Organic Light Emitting Diode.The touch display unit has as a result,
There is good touch effect, service performance is preferable, and is easy the border effect that narrows.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the structural schematic diagram of touch panel according to an embodiment of the invention；
Fig. 2 shows the cut-away section structural schematic diagram of touch panel according to an embodiment of the invention；
Fig. 3 shows the cut-away section structural schematic diagram of touch panel in accordance with another embodiment of the present invention；
Fig. 4 shows the structural schematic diagram of insulating protective layer according to an embodiment of the invention；
Fig. 5 shows the structural schematic diagram of flexible circuit board according to an embodiment of the invention；
Fig. 6 shows the part-structure figure of touch panel according to an embodiment of the invention；
Fig. 7 shows the method flow diagram according to an embodiment of the invention for preparing touch panel；And
Fig. 8 shows the structural schematic diagram of touch display unit according to an embodiment of the invention.
Description of symbols:
100: substrate；110: touch sensing area；120: cabling area；121: binding region；200: touch control electrode；210: electrode
Lead；220: ground line；230: connection terminal；300: antistatic metal layer；400: insulating protective layer；410: opening；500: soft
Property circuit board；510: first connecting portion；520: second connecting portion；1000: touch panel；1100: display module；1200: touching
Display device.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In one aspect of the invention, the invention proposes a kind of touch panels.According to an embodiment of the invention, with reference to figure
1 and Fig. 2 (wherein, Fig. 2 be Fig. 1 in the region M along the direction AA ' sectional view), touch panel 1000 include substrate 100,
Touch control electrode 200, antistatic metal layer 300, insulating protective layer 400 and flexible circuit board 500, wherein have on substrate 100
Touch sensing area 110, and positioned at the cabling area 120 on 110 periphery of touch sensing area, substrate 100 is arranged in touch control electrode 200
Side, side of the substrate 100 far from touch control electrode 200 is arranged in antistatic metal layer 300, and antistatic metal layer 300 is in base
Orthographic projection on plate 100 is located in cabling area 120, and insulating protective layer 400 is arranged in antistatic metal layer 300 far from substrate 100
Side, insulating protective layer 400 has opening (not shown), and the orthographic projection of the opening on the substrate 100 is located at cabling area
In 120, flexible circuit board 500 is electrically connected in the opening and antistatic metal layer 300.The touch panel 1000 passes through as a result,
Add antistatic metal layer 300 in cabling area 120 of the substrate 100 far from 200 side of touch control electrode, and by itself and flexible circuit
Plate 500 is connected (i.e. with the ground conductive of flexible circuit board 500), can avoid electrode damage, and will not increase with quick release electrostatic
The width (i.e. border width) for adding cabling area 120, not only can be improved the antistatic effect of touch panel 1000, but also be conducive to narrow
Frame promotes the visual effect of the product using the touch panel 1000.
In order to make it easy to understand, can be realized the original of above-mentioned beneficial effect to touch panel according to an embodiment of the present invention below
Reason is illustrated:
As previously mentioned, antistatic effect weakens after the frame of current touch panel reduces, it is easy to appear touch-control mistake
The problems such as clever.Specifically, current touch panel usually arranges contact conductor and ground line in its rim area (i.e. cabling area)
(i.e. GND signal wire), ground line is usually placed in the outermost of rim area, for shielding static discharge (ESD) to touch control electrode
It is damaged Deng caused by.The width of ground line determines the quality of touch screen anti-electrostatic discharging (ESD) performance, and ground line is wider, releases
The speed of electrostatic discharge is faster, will not make accumulation of static electricity breakdown electrode lead etc., and the antistatic property of touch screen can be improved, and
It can guard electrode.But the prevalence of product narrow frame is shown now with mobile phone etc., rim area is more and more narrow, and wiring space is not
Foot, thus contact conductor becomes narrow, the distance between contact conductor is smaller and smaller, and the width of ground line is also smaller and smaller, and
And the distance between ground line and contact conductor are increasingly closer.Therefore, on the one hand, the width of ground line reduces, release electrostatic
Speed slows down, and antistatic effect weakens；On the other hand, ground line and the distance between contact conductor are smaller, promoted electrostatic across
More ground line flows to contact conductor, and imports touch control electrode, and under high pressure, touch control electrode, which is highly susceptible to electric injury, leads to channel
Open circuit causes touch-control failure.It is quiet when object of the touch screen contact with electrostatic, or when the manpower touch display screen with electrostatic
Electricity can enter screen body from the side edge gap of screen, relatively narrow under higher electrostatic potential when 6kV (such as electrostatic potential be greater than)
Ground line be not enough to quick release electrostatic charge, cause punch through contact conductor even touch control electrode, there is touch-control failure,
The touch function of touch screen is even completely destroyed when serious.
And touch panel 1000 according to an embodiment of the present invention, pass through the walking far from 200 side of touch control electrode in substrate 100
Antistatic metal layer 300 is added in line area 120, and it is connected with flexible circuit board 500 (i.e. with the ground of flexible circuit board 500
Line conducting), electrode damage can be avoided with quick release electrostatic, without increasing the width of ground line, it might even be possible to reduce ground line
Width, reduce the width (i.e. border width) in cabling area 120, thus touch panel according to an embodiment of the present invention 1000 both had
There is good antistatic effect, and be conducive to the frame that narrows, visual effect is good.
According to an embodiment of the invention, the concrete type of substrate 100 is not particularly limited, as long as it is with good light transmission
Property.Specifically, substrate 100 can be flexible transparent film, such as can for polyethylene terephthalate (PET),
COP optical material etc..
According to an embodiment of the invention, the material for forming antistatic metal layer 300 is not particularly limited, such as may include
The conductive materials such as gold, silver.According to an embodiment of the invention, antistatic metal layer 300 is arranged in substrate 100 far from touch control electrode
200 side, and be located in cabling area 120, i.e. the width of antistatic metal layer 300 (refers to antistatic metal shown in Figure 2
Slice width degree d) (refers to cabling sector width a) shown in Figure 2, thus, on the one hand, avoid preventing no more than the width in cabling area 120
The projection of electrostatic metal floor 300 on the substrate 100 is located in touch sensing area 110, influences the display performance in touch sensing area 110
Deng causing bad；On the other hand, there can also be a certain distance between antistatic metal layer 300 and the outer edge of substrate 100,
Such as antistatic metal layer 300 edge and substrate 100 edge between minimum range can be 0.08-0.15mm, i.e., it is anti-
The distance between outer edge and the outer edge (referring to "outside" direction shown in Figure 2) of substrate 100 of electrostatic metal layer 300 (are joined
Examining distance c) shown in Fig. 2 can be 0.08-0.15mm, such as can be 0.1mm, can be 0.12mm etc..As a result, may be used
The defects of crackle outer peripheral to avoid substrate, causes antistatic metal layer to crack, and can make the antistatic metal layer
300 width d is as big as possible, the further high service performance of the touch panel.It should be noted that if antistatic metal
There is crackle at the edge of layer 300, then antistatic metal layer 300 is not one continuous whole, can be breaking in cracks, thus can not
At opening 410, the ground wire of entire antistatic metal layer 300 and flexible circuit board 500 is conducted, in turn results in antistatic gold
The static guiding removing solid capacity for belonging to layer 300, which weakens, even to fail, and therefore, has between antistatic metal layer 300 and the outer edge of substrate 100
A certain distance, such as the distance of 0.08-0.15mm can cause to prevent quiet to avoid the defects of 100 outer peripheral crackle of substrate
Metal layer 300 cracks, and further increases the service performance of antistatic metal layer 300.
According to an embodiment of the invention, with reference to Fig. 1-Fig. 3, (Fig. 3 is that cross section structure of the n-quadrant along the direction BB ' in Fig. 1 shows
It is intended to), touch panel 1000 further comprises: multiple electrodes lead 210 and ground line 220, contact conductor 210 is located at cabling
In area 120, and it is connected with touch control electrode 200；Ground line 220 is located in cabling area 120, and is arranged with 200 same layer of touch control electrode.
It should be noted that contact conductor 210 and ground line 220 all extend to binding region (Bonding in cabling area 120
Pad), and with the connection terminal positioned at binding region be connected (not shown), so as to by contact conductor 210 and ground line 220
It is bound by the connection terminal and flexible circuit board, wherein ground line 220 is located at the periphery of contact conductor 210 (with reference in Fig. 3
Shown ground line 220A and 220B).
According to an embodiment of the invention, the width of ground line 220 (can be with reference to ground connection line width b) shown in Fig. 2
It no more than 25 μm, such as can be 22 μm, can be 20 μm, can be 15 μm etc..As previously mentioned, current touch panel in order to
Narrow frame, and the width in rim area (i.e. cabling area) is smaller, but guarantees the antistatic property of the touch panel again, therefore is grounded
The width of line is usually 30-80 μm, if ground line width less than 30 μm, touch panel occur breakdown etc. risk compared with
Greatly, antistatic property is poor.And touch panel 1000 according to an embodiment of the present invention, by (the reference of the lower surface of substrate 100
"upper" shown in the drawings, "lower" direction) antistatic metal layer 300 is added, it is quiet that resisting for touch panel 1000 can be significantly improved
Electrical property, thus, the width of the ground line 220 can be smaller, such as can both will not influence the touch as a result, less than 25 μm
The antistatic property of panel 1000, and it is advantageously implemented more narrow frame.
According to an embodiment of the invention, one of antistatic metal layer 300 far from substrate 100 is arranged in insulating protective layer 400
Side, insulating protective layer 400 at least all cover the antistatic metal layer 300.According to an embodiment of the invention, forming insulation protection
The specific material of layer 400 is not particularly limited, as long as antistatic metal layer 300 can be protected (such as to prevent electrostatic metal layer 300 from drawing
Wound etc.), and there is insulation performance.Specifically, insulating protective layer 400 can be by transparent material or opaque material
It is formed, when insulating protective layer 400 is formed by opaque material, which exists
In cabling area 120, more specifically, with reference to Fig. 1 and illustrated in fig. 2, the orthographic projection of insulating protective layer 400 on the substrate 100
It can be completely coincident with the orthographic projection of antistatic metal layer 300 on the substrate 100；When insulating protective layer 400 is by transparent material shape
Cheng Shi, insulating protective layer 400 can cover all surfaces and substrate of the antistatic metal layer 300 far from 100 side of substrate
100 all surfaces far from 200 side of touch control electrode, simplify production technology as a result, and do not influence the prepared touch surface
The service performance of plate.Specifically, with reference to Fig. 4, the shape and size of insulating protective layer 400 can be identical with substrate 100, insulation
There is opening 410, the orthographic projection of opening 410 on the substrate 100 is located in cabling area 120 (shown in Fig. 4 on protective layer 400
Dotted line frame be substrate 100 when side of the antistatic metal layer 300 far from substrate 100 is arranged in the insulating protective layer 400
On touch sensing area 110 and cabling area 120 line of demarcation), flexible circuit board 500 is at the opening 410 and antistatic metal
Layer 300 is electrically connected.
According to an embodiment of the invention, flexible circuit board 500 may include first connecting portion 510 with reference to Fig. 1 and Fig. 5
And second connecting portion 520, wherein first connecting portion 510 can be electrically connected with touch control electrode 200, specifically, as previously mentioned,
With reference to Fig. 6, multiple electrodes lead 210 and touch control electrode 200 are electrically connected (not shown) and extend in binding region 121,
Multiple electrodes lead 210 can be connected with the connection terminal 230 being located in binding region (Bonding Pad) 121, the connecting pin
Son can be connected with the metal terminal in first connecting portion 510, and then realize the electricity of first connecting portion 510 and touch control electrode 200
Connection.Second connecting portion 520 can be electrically connected with the antistatic metal layer 300 at opening 410, i.e., antistatic metal layer 300 can
With at the opening 410 and the ground conductive of second connecting portion 520, and then the static guiding generated on touch panel can be removed,
Prevent electrostatic damage.
According to an embodiment of the invention, can have metal terminal in first connecting portion 510, the metal terminal can with it is preceding
The connection terminal being connected described in face with touch control electrode 200 is connected.According to an embodiment of the invention, in second connecting portion 520
It could be formed with metal terminal, metal terminal can not also be formed, is i.e. second connecting portion 520 can be entire face copper, as a result,
Ground wire convenient for antistatic metal layer 300 and the second connecting portion 520 is connected entirely, so as to quick release electrostatic, and saves
Production process.Specifically, mentioned-above face copper and opening 410 at antistatic metal layer 300 between can have conducting resinl,
Second connecting portion 520 and antistatic metal layer 300 are electrically connected by the conducting resinl in which not only can be convenient, and can also be protected exposed
Face copper avoids face copper oxidation etc., further improves the service performance of the touch panel.
It should be noted that be the planar structure schematic diagram of flexible circuit board 500 shown in Fig. 1 and Fig. 5,
In three-dimensional space, the first connecting portion 510 of flexible circuit board 500 is arranged with 200 same layer of touch control electrode, second connecting portion
520 are arranged in side of the antistatic metal layer 300 far from substrate 100, i.e., first connecting portion 510 and second connecting portion 520 are even
After being connected on substrate 100, not in the same plane, but the certain distance that is staggered in a direction perpendicular to a substrate.By
This, which can simultaneously and antistatic metal layer 300 and the electrical connection of touch control electrode 200, and will not mutual shadow
It rings and interferes, further improve the service performance of the touch panel.
According to an embodiment of the invention, with reference to Fig. 1 and Fig. 5, the orthographic projection of first connecting portion 510 on the substrate 100
The edge of the orthographic projection of edge and second connecting portion 520 on the substrate 100 is not overlapped.In other words, noted earlier with reference to Fig. 6
The orthographic projection on the substrate 100 of opening 410 and binding region 121 be not overlapped, distinguish as a result, convenient for the flexible circuit board 500
It is electrically connected with antistatic metal layer 300 and touch control electrode 200, and will not influence each other and interfere, further improve this
The service performance of touch panel.
According to an embodiment of the invention, the edge and second connecting portion of the orthographic projection of first connecting portion 510 on the substrate 100
The distance between 520 edge of orthographic projection on the substrate 100 (the distance f) with reference to shown in Fig. 5 can be not less than 20 μm,
Such as can be 30 μm, it can be 50 μm etc..As a result, convenient for flexible circuit board 500 respectively with touch control electrode 200 and antistatic
Metal layer 300 is electrically connected.According to an embodiment of the invention, with reference to Fig. 6, the edge of the orthographic projection of opening 410 on the substrate 100 and
The distance between edge of binding region 121 can also be greater than 20 μm, be convenient for first connecting portion 510 and second connecting portion as a result,
520 are correspondingly connected with touch control electrode 200 and antistatic metal layer 300 respectively.
According to an embodiment of the invention, with reference to Fig. 6, (Fig. 6 is part-structure signal of the n-quadrant in cabling area 120 in Fig. 1
Figure), be open 410 orthographic projections (i.e. in cabling area 120) on the substrate 100, can be arranged close to binding region 121, as a result, just
In flexible circuit board 500 simultaneously and antistatic metal layer 300 and touch control electrode 200 electrical connection.According to an embodiment of the invention,
The orthographic projection and binding region 121 of opening 410 on the substrate 100 is not overlapped.It is not only convenient for flexible circuit board 500 as a result, simultaneously
It is electrically connected with antistatic metal layer 300 and touch control electrode 200, and between first connecting portion 510 and second connecting portion 520 not
It can influence each other and interfere, further improve the service performance of the touch panel 1000.
In another aspect of this invention, the invention proposes a kind of methods for preparing mentioned-above touch panel.According to
The embodiment of the present invention, touch panel prepared by this method can have all special possessed by mentioned-above touch panel
Sign and advantage, details are not described herein.Generally speaking, the touch panel antistatic property of this method preparation is good, and is easy narrow
Change frame.According to an embodiment of the invention, with reference to Fig. 7, this method comprises:
S100: substrate is provided
In this step, substrate is provided.According to an embodiment of the invention, the concrete type of substrate is not particularly limited, only
Want it with good translucency.Specifically, substrate can be flexible transparent film, such as can be poly terephthalic acid
Glycol ester (PET), COP optical material etc..According to an embodiment of the invention, the substrate can be divided into touch sensing area and
Positioned at the cabling area on the touch sensing area periphery.
S200: touch control electrode is formed
In this step, the first patterning processes are passed through in the side of the substrate in front, form touch control electrode.According to this
The embodiment of invention, can first specifically oxygen can be deposited in the side vapor deposition flood metal oxide of the substrate in front
Change indium tin (ITO), form conductive metal layer, then carry out the first patterning processes, i.e., exposure mask is set on the surface of conductive metal layer,
And etching technics is carried out, then which is removed into exposure mask to form touch control electrode again.It specifically, can be with
Pass through the setting of the techniques such as coating photoresist, exposure, development and removal exposure mask.
It is also possible to two layers according to an embodiment of the invention, the touch control electrode that this method is formed can be one layer, when
When the touch control electrode of formation is two layers, double layer of metal oxide can be deposited respectively on substrate, and perform etching processing respectively
Deng to form two layers of electrode layer, and being also formed with insulating layer between two layers of electrode layer.For example, can be in the side of substrate
Formed matrix electrodes (i.e. touch control electrode), the matrix electrodes may include be oppositely arranged and the first electrode layer of mutual insulating and
The second electrode lay, for example, first electrode layer can be driving electrodes (Tx), the second electrode lay can be induction electrode (Rx), the
One electrode layer includes multiple first sub-electrode arranged in parallel along first direction, and the second electrode lay includes multiple putting down in a second direction
The second sub electrode of row arrangement, wherein first direction and second direction are vertical.Also, by etching technics, base can be located at
Conductive metal layer in plate cabling area etches contact conductor, ground line (GND) and connection terminal.Specifically, touch control electrode,
Contact conductor, the positional relationship of ground line and dimensional parameters etc. can with it is previously described identical, details are not described herein.
According to a particular embodiment of the invention, the width for etching the ground line of formation can be 20 μm, the outside of ground line
The outer peripheral distance of edge and substrate can be 0.1mm, and the line width of the contact conductor in cabling area can be 5 μm, adjacent two
The distance between contact conductor can be 10 μm.
S300: antistatic metal layer is formed
In this step, in side of the substrate far from the touch control electrode formed in preceding step, evaporation metal, and by the
Two patterning processes form antistatic metal layer.According to an embodiment of the invention, in substrate far from the touch-control formed in preceding step
Before the side evaporation metal of electrode, layer protecting film is attached far from the side of substrate in touch control electrode in advance, is prevented subsequent
Mechanical damage and environmental pollution are caused to touch control electrode etc. in technique.According to an embodiment of the invention, can be first remote in substrate
Flood metal is deposited in side from the touch control electrode formed in preceding step, such as the conductive metals such as gold, silver can be deposited, then
Second patterning processes are carried out to the flood metal of vapor deposition, that is, exposure mask, etching and the technique for removing exposure mask are configured, so as to shape
At antistatic metal layer.Specifically, it can be arranged and remove exposure mask by techniques such as coating photoresist, exposure, developments.Specifically
Ground etches projection of the antistatic metal layer of formation on substrate and is located in cabling area, i.e. the width of antistatic metal layer is little
Width in cabling area.More specifically, as previously mentioned, the outer peripheral distance of outer edge and substrate of antistatic metal layer can be
0.08-0.15mm。
S400: insulating protective layer is formed
In this step, the antistatic metal layer formed in step in front forms insulation protection far from the side of substrate
Layer, and opening is formed on the insulating protective layer of formation.According to an embodiment of the invention, can be in antistatic metal layer far from base
The side of plate prints to form insulating protective layer, and opening can be formed on the insulating protective layer being formed in cabling area.Specifically,
The parameters such as the position of opening, the position of insulating protective layer, material can with previously described identical details are not described herein.For example,
Insulating protective layer can be to be formed by transparent material, and insulating protective layer can cover antistatic metal layer and substrate far from touching
Control all surfaces of electrode.Thus, it is possible to simplify production technology, and the service performance of prepared touch panel is not influenced.
S500: flexible circuit board and antistatic metal layer are electrically connected
In this step, the opening of the insulating protective layer formed in step in front, by flexible circuit board and antistatic
Metal layer electrical connection.According to an embodiment of the invention, the structure of flexible circuit board can with it is previously described identical, herein no longer
It repeats.Specifically, by the second connecting portion of flexible circuit board and can be prevented quiet in the opening of insulating protective layer using conducting resinl
Metal layer electrical connection, and then the antistatic metal layer can quickly be led except the electrostatic generated on touch panel, prevent electrostatic from damaging
Wound.
In summary, this method can easily prepare touch panel, and the touch panel antistatic property of preparation is good, and
It is easy the frame that narrows.
In still another aspect of the invention, the invention proposes a kind of touch display units.According to an embodiment of the invention, ginseng
Fig. 8 is examined, touch display unit 1200 includes: mentioned-above touch panel 1000 and display module 1100, display module
1100 and touch panel 1000 be bonded, specifically, as illustrated in FIG. 8, touch panel 1100 can be fitted in display module
1100 top.Specifically, display module 1100 may include at least one of liquid crystal display, Organic Light Emitting Diode.By
This, which has good touch effect, and service performance is preferable, and is easy the border effect that narrows.
In the description of this specification, the orientation or positional relationship of the instructions such as term " on ", "lower", "inner", "outside" is base
In orientation or positional relationship shown in the drawings, it is merely for convenience of the description present invention rather than requires the present invention must be with specific
Orientation construction and operation, therefore be not considered as limiting the invention.
In the description of this specification, the description of reference term " one embodiment ", " another embodiment " etc. means to tie
The embodiment particular features, structures, materials, or characteristics described are closed to be included at least one embodiment of the present invention.At this
In specification, the schematic representation of the above terms does not necessarily have to refer to the same embodiment or example.Moreover, the tool of description
Body characteristics, structure, material or feature may be combined in any suitable manner in any one or more of the embodiments or examples.This
Outside, without conflicting with each other, those skilled in the art by different embodiments described in this specification or can show
The feature of example and different embodiments or examples is combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of touch panel characterized by comprising
Substrate has touch sensing area, and the cabling area positioned at touch sensing area periphery on the substrate；
The side of the substrate is arranged in touch control electrode, the touch control electrode；
Side of the substrate far from the touch control electrode is arranged in antistatic metal layer, the antistatic metal layer, and described
The orthographic projection of antistatic metal layer on the substrate is located in the cabling area；
Insulating protective layer, the side of the antistatic metal layer far from the substrate is arranged in the insulating protective layer, described exhausted
Edge protective layer has opening, and the orthographic projection of the opening on the substrate is located in the cabling area；
Flexible circuit board, the flexible circuit board are electrically connected in the opening and the antistatic metal layer.
2. touch panel according to claim 1, which is characterized in that the flexible circuit board include first connecting portion and
Second connecting portion, the first connecting portion and touch control electrode electrical connection, the second connecting portion and the antistatic metal
Layer electrical connection.
3. touch panel according to claim 2, which is characterized in that the positive throwing of the first connecting portion on the substrate
The orthographic projection of shadow and the second connecting portion on the substrate is not overlapped.
4. touch panel according to claim 3, which is characterized in that the positive throwing of the first connecting portion on the substrate
The distance at the edge of the orthographic projection of the edge of shadow and the second connecting portion on the substrate is not less than 20 μm.
5. touch panel according to claim 1, which is characterized in that the edge and the substrate of the antistatic metal layer
Edge between minimum range be 0.08-0.15mm.
6. touch panel according to claim 1, which is characterized in that have binding region, the touching in the cabling area
Touching panel further comprises:
Multiple electrodes lead, the contact conductor are located in the cabling area, and the contact conductor is connected with the touch control electrode
And it extends in the binding region；
Ground line, the ground line are located in the cabling area, and the ground line and the touch control electrode same layer are arranged and extend
To in the binding region, wherein the ground line is located at the periphery of the contact conductor.
7. touch panel according to claim 6, which is characterized in that the width of the ground line is not more than 25 μm.
8. a kind of method for preparing the described in any item touch panels of claim 1-7 characterized by comprising
Substrate is provided；
Pass through the first patterning processes in the side of the substrate, forms touch control electrode；
In side evaporation metal of the substrate far from the touch control electrode, and pass through the second patterning processes, forms antistatic gold
Belong to layer；
Insulating protective layer is formed far from the side of the substrate in the antistatic metal layer, and in the insulation protection of formation
Opening is formed on layer；
Flexible circuit board is electrically connected in the opening and the antistatic metal layer.
9. according to the method described in claim 8, it is characterized in that, the insulating protective layer is formed by transparent material, institute
It states insulating protective layer and covers all surfaces of the antistatic metal layer and the substrate far from the touch control electrode.
10. a kind of touch display unit characterized by comprising
The described in any item touch panels of claim 1-7；
Display module, the display module and touch panel fitting, the display module includes liquid crystal display, You Jifa
At least one of optical diode.
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| CN201910238940.7A CN109947305B (en) | 2019-03-27 | 2019-03-27 | Touch panel, preparation method thereof and touch display device |
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| CN201910238940.7A CN109947305B (en) | 2019-03-27 | 2019-03-27 | Touch panel, preparation method thereof and touch display device |
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| CN111580699A (en) * | 2020-05-13 | 2020-08-25 | 京东方科技集团股份有限公司 | Display module and display device |
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| CN113504848A (en) * | 2021-07-26 | 2021-10-15 | 京东方科技集团股份有限公司 | Flexible circuit board, touch display module, driving method of touch display module and display device |
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| CN113504848A (en) * | 2021-07-26 | 2021-10-15 | 京东方科技集团股份有限公司 | Flexible circuit board, touch display module, driving method of touch display module and display device |
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