CN107562292A - Touch screen and electronic equipment - Google Patents
Touch screen and electronic equipment Download PDFInfo
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- CN107562292A CN107562292A CN201610511990.4A CN201610511990A CN107562292A CN 107562292 A CN107562292 A CN 107562292A CN 201610511990 A CN201610511990 A CN 201610511990A CN 107562292 A CN107562292 A CN 107562292A
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Abstract
The present invention proposes touch screen and electronic equipment.Specifically, the touch screen includes：Cover sheet；Display module, the display module are arranged at below the cover sheet；And pressure sensitive structure, the pressure sensitive structure includes first pressure inductive layer and second pressure inductive layer, first pressure inductive layer and second pressure the inductive layer electrical connection, the pressure sensitive structure, 50% of initial capacitance value no more than the IC detection capacitance upper limits of the pressure sensitive electric capacity.Pass through the design to distance and area between first pressure inductive layer and second pressure inductive layer, the upper limit of the initial capacitance value of the pressure sensitive electric capacity formed it into and IC detection capacitances has certain proportionate relationship, during so as to prevent from carrying out pressure sensitive, because pressure sensitive electric capacity becomes big after pressing, cause the pressure sensitive electric capacity after pressing that signal spilling occurs more than IC upper limit of detection.
Description
Technical field
The present invention relates to electronic applications, more particularly to touch screen and electronic equipment.
Background technology
Touch-screen is because having the advantages that ease for operation, intuitive and flexibility, it has also become PMC equipment and comprehensive
Close primary human's interactive meanses of information terminal such as tablet personal computer and smart mobile phone, super notebook computer etc..Touch-screen according to
Different touch-control principles can be divided into electric resistance touch screen, capacitance touch screen, infrared touch panel and surface acoustic wave (SAW) touch-screen etc. four
Kind main Types.Wherein capacitance touch screen has a function of multi-point touch, the reaction time is fast, service life is long and light transmission rate compared with
Height, user experience is superior, while is significantly improved with progressively maturation, the yields of technique, and capacitance plate price is increasingly
Reduce, turned into the major technique that the interaction of small-medium size information terminal touch-control uses at present.Current capacitance touch screen, can not only
Perceive screen body where plane (X, Y-axis two-dimensional space) touch location, for perpendicular to screen body plane (Z axis) touch parameter,
Also it can be perceived, i.e., the touch pressure of capacitance touch screen can be sensed.
However, still have much room for improvement to improve the sensitivity of pressure sensitive and order of accuarcy, the structure of current touch screen.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
One purpose is to provide a kind of three-dimensional multi-point touch control screen.
In one aspect of the invention, the present invention proposes a kind of touch screen.According to an embodiment of the invention, the touch screen
Including：Cover sheet；Display module, the display module are arranged at below the cover sheet；And pressure sensitive structure, institute
Stating pressure sensitive structure includes first pressure inductive layer and second pressure inductive layer, the first pressure inductive layer and second
Pressure sensitive layer electrically connects, the pressure sensitive structure, and the initial capacitance value of the pressure sensitive electric capacity is no more than IC detection electricity
The 50% of the capacitance upper limit.By the design to distance and area between first pressure inductive layer and second pressure inductive layer,
The upper limit of the initial capacitance value of the pressure sensitive electric capacity formed it into and IC detection capacitances has certain proportionate relationship, so as to
When preventing from carrying out pressure sensitive, because pressure sensitive electric capacity becomes big after pressing, the pressure sensitive electric capacity after pressing is caused to exceed
IC upper limit of detection and occur signal spilling.
According to an embodiment of the invention, having between the first pressure inductive layer and the second pressure inductive layer to press
Contracting space.In actual use, with perpendicular to the different of screen body plane touch-control dynamics difference can occur for first pressure inductive layer
The deformation of degree, so that the electric capacity between first pressure inductive layer and second pressure inductive layer is with distance between two layers
Change and change, and then the touch screen can perceive the change of the touch-control pressure on diverse location, so as to realize feeling of stress
Answer function.
According to an embodiment of the invention, the height of the compressible space is 0.1~0.4mm.Thus, it is possible to ensure first
Between pressure sensitive layer and second pressure inductive layer there is appropriate spacing to serve as deformation space, so as to so that the pressure formed
Power induced electricity capacitance detects suitable for IC, avoids signal from overflowing.
According to an embodiment of the invention, the first pressure inductive layer has multiple first pressure induction electrodes, optionally,
The second pressure inductive layer has multiple second pressure induction electrodes.Thus, it is possible to strengthen the electronic equipment to the quick of pressure
Sense degree.
According to an embodiment of the invention, the display module has optical filter, and the first pressure inductive layer is arranged at institute
State on optical filter, the first pressure induction electrode gross area is 5~80mm2.Thus, it is possible to by controlling first pressure to sense
The electrode gross area on layer, pressure sensitive electric capacity is set to be in appropriate number range, so as to so that the pressure sensitive formed
Capacitance detects suitable for IC, avoids signal from overflowing.
According to an embodiment of the invention, the display module has back light unit, and the first pressure inductive layer is arranged at
On the reflector plate of the back light unit, the second pressure inductive layer be the back light unit chase, the first pressure sense
It is 1~80mm to answer the electrode gross area2.Thus, it is possible to by controlling the electrode gross area on first pressure inductive layer, make feeling of stress
Electric capacity is answered to be in appropriate number range, so as to so that the pressure sensitive capacitance formed avoids signal suitable for IC detections
Overflow.
According to an embodiment of the invention, the display module has optical filter and back light unit, the first pressure sense
Answer layer to be arranged on the optical filter, the second pressure inductive layer be the back light unit chase, the first pressure sense
It is 1~40mm to answer the electrode gross area2.Thus, it is possible to by controlling the electrode gross area on first pressure inductive layer, make feeling of stress
Electric capacity is answered to be in appropriate number range, so as to so that the pressure sensitive capacitance formed avoids signal suitable for IC detections
Overflow.
According to an embodiment of the invention, the display module has back light unit, and the first pressure inductive layer is arranged at
On the reflector plate of the back light unit, the second pressure inductive layer be the back light unit chase, the first pressure sense
It is 0.1~0.4mm to answer the distance of layer and the second pressure inductive layer.Thus, it is possible to ensure first pressure inductive layer and
Between second pressure inductive layer there is appropriate spacing to serve as deformation space, so as to so that the pressure sensitive capacitance formed is fitted
Detected in IC, avoid signal from overflowing.
According to an embodiment of the invention, the display module has optical filter, and the first pressure inductive layer is arranged at institute
State on optical filter, the second pressure inductive layer is the chase of the back light unit, the first pressure inductive layer and described
The distance of second pressure inductive layer is 0.6~1.3cm.Thus, it is possible to ensure first pressure inductive layer and second pressure sensing
Between layer there is appropriate spacing to serve as deformation space, so as to so that the pressure sensitive capacitance formed is kept away suitable for IC detections
Exempt from signal spilling.
According to an embodiment of the invention, the display module has public electrode, and the second pressure inductive layer is described
The distance of public electrode, the first pressure inductive layer and the second pressure inductive layer is 0.6~1.3cm.Thus, it is possible to
Ensure between first pressure inductive layer and second pressure inductive layer there is appropriate spacing to serve as deformation space, so as to so that
The pressure sensitive capacitance of formation detects suitable for IC, avoids signal from overflowing.
According to an embodiment of the invention, the display module has public electrode, and the second pressure inductive layer is described
Public electrode, the first pressure induction electrode gross area are 1~500mm2.Thus, it is possible to by controlling first pressure to sense
The electrode gross area on layer, pressure sensitive electric capacity is set to be in appropriate number range, so as to so that the pressure sensitive formed
Capacitance detects suitable for IC, avoids signal from overflowing.
According to an embodiment of the invention, the first pressure inductive layer includes sensor circuit and drive circuit, the sense
It is 0.04~0.15mm to answer the distance between circuit and the drive circuit.Now first pressure inductive layer can pass through individual layer
The inductance capacitance with pressure correlation is exported from the mode of appearance, second pressure inductive layer can be used as ground plane.Thus, it is possible to ensure
Between the sensor circuit and drive circuit of one pressure sensitive layer there is appropriate spacing to serve as deformation space, so as to so as to press
The electric capacity that first pressure inductive layer exports after pressure detects suitable for IC, and the capacitance for avoiding being formed after pressing is too small and reduces detection
Sensitivity level.
According to an embodiment of the invention, the sensor circuit and the drive circuit couple to form mutual tolerance electric capacity, described
80% of the initial capacitance value of mutual tolerance electric capacity not less than the IC detection capacitance upper limits.Thus, it is possible to ensure first pressure inductive layer
Sensor circuit and drive circuit between the mutual tolerance electric capacity that is formed be within appropriate number range, so as to so that pressing
The mutual tolerance electric capacity of first pressure inductive layer output detects suitable for IC afterwards, and the capacitance for avoiding being formed after pressing is too small and reduces detection
Sensitivity level.
In another aspect of this invention, the present invention proposes a kind of electronic equipment.The electronic equipment includes foregoing
Touch screen and the center for supporting the touch screen, the center form the second pressure inductive layer.Made using center
For second pressure inductive layer, due to need not additionally set second pressure inductive layer, the thickness of the electronic equipment, drop are advantageously reduced
Low production cost.
According to an embodiment of the invention, when first pressure inductive layer is arranged on optical filter, the first pressure induced electricity
The pole gross area is 5~80mm2；When first pressure inductive layer is arranged on reflector plate, the total face of first pressure induction electrode
Product is 1~80mm2.When center is as second pressure inductive layer, pressure sensitive electricity is electrically connected to form with first pressure inductive layer
Hold, according to the particular location of first pressure inductive layer and the distance between first pressure inductive layer and center, the pressure of regulation first
The first pressure induction electrode gross area in power inductive layer, so as to so that the electric capacity exported after pressing detects suitable for IC.
According to an embodiment of the invention, when the first pressure inductive layer is arranged on the optical filter, described first
The distance of pressure sensitive layer and the second pressure inductive layer is 0.6~1.3cm；When the first pressure inductive layer is arranged at
When on the reflector plate of the back light unit, the distance of the first pressure inductive layer and the second pressure inductive layer is 0.1
~0.4mm.When center is as second pressure inductive layer, pressure sensitive electric capacity, root are electrically connected to form with first pressure inductive layer
According to the particular location of first pressure inductive layer, the distance between first pressure inductive layer and center are adjusted, so as to so that pressing
The electric capacity exported afterwards detects suitable for IC.
Brief description of the drawings
Fig. 1 shows the structural representation of touch screen according to an embodiment of the invention；
Fig. 2 shows the part-structure schematic diagram of touch screen in accordance with another embodiment of the present invention；
Fig. 3 shows the part-structure schematic diagram of the touch screen according to another embodiment of the invention；
Fig. 4 shows the part-structure schematic diagram of the touch screen according to another embodiment of the invention；
Fig. 5 shows the part-structure schematic diagram of the touch screen according to another embodiment of the invention；
Fig. 6 shows the part-structure schematic diagram of the touch screen according to another embodiment of the invention；
Fig. 7 A- Fig. 7 F show the electrode structure schematic diagram of first pressure inductive layer according to embodiments of the present invention；
Fig. 8 A- Fig. 8 C show the structural representation of pressure sensitive electrode according to embodiments of the present invention；And
Fig. 9 shows the structural representation of electronic equipment according to an embodiment of the invention.
Description of reference numerals：
100：Cover sheet；
200：Display module；
210：Optical filter；220：Liquid crystal display 230：Back light unit；240：Chase；250：Reflector plate；260：It is public
Electrode
300：Pressure sensitive structure；310：First pressure inductive layer；320：Second pressure inductive layer；10：Pressure sensitive electricity
Pole；20：Shielding line；30：Induction electrode；40：Driving electrodes
400：Compressible space
500：Center
1000：Electronic equipment；1100：Touch screen.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, term " on ", " under ", " vertical ", " level ", " top ", " bottom ", " width ", " thickness "
Orientation or position relationship Deng instruction be based on orientation shown in the drawings or position relationship, be for only for ease of the description present invention and
Being not required the present invention must be with specific azimuth configuration and operation, therefore is not considered as limiting the invention.In this hair
In bright, touch screen, electronic equipment, cover sheet or first pressure inductive layer, the isostructural " upper table of second pressure inductive layer
The term such as face ", " top " refers in particular in actual use, and the equipment such as touch screen or structure pass through towards the side of user, i.e. user
Touch or pressure touch is to touch screen or the side of electronic equipment implementation operation.
In the first aspect of the present invention, the present invention proposes a kind of touch screen.Specifically, with reference to figure 1, the touch screen bag
Include：Cover sheet 100, display module 200 and pressure sensitive structure 300, pressure sensitive structure 300 include first pressure sense
Answer layer 310 and second pressure inductive layer 320.Wherein, display module 200 is arranged on the lower surface of cover sheet 100, pressure sensitive
At least one layer of structure 300 is arranged inside display module 200, or pressure sensitive structure may be contained within outside display module
(not shown), 50% of initial capacitance value no more than the IC detection capacitance upper limits of pressure sensitive electric capacity.When to the touch-control
When screen carries out touch control operation, at least one of first pressure inductive layer 310 and second pressure inductive layer 320 can be due to touch-control pressures
Power and deform, so as to cause the electric capacity at touch point between first pressure inductive layer 310 and second pressure inductive layer 320
Changed with touch-control pressure, so as to realize pressure sensitive.By sensing to first pressure inductive layer and second pressure
Between layer in distance, first pressure inductive layer 310 and second pressure inductive layer 320 electrode area design, form it into
The upper limit of the initial capacitance value of pressure sensitive electric capacity and IC detection capacitances has certain proportionate relationship, so as to prevent being pressed
When power senses, because pressure sensitive electric capacity becomes greatly or diminished after pressing, the pressure sensitive electric capacity after pressing is caused more than IC
Upper limit of detection and signal spilling occurs, or pressure sensitive electric capacity becomes too small and causes detection sensitivity poor after the pressing.
In order to facilitate understanding, the principle that touch screen according to embodiments of the present invention works is carried out briefly first below
It is bright：When touch screen is pressed by touch, at least one of first pressure inductive layer 310 and second pressure inductive layer 320 can be with
The structure such as cover sheet 100 and display module 200 to deform upon together, the electric capacity calculation formula according to Formulas I：
C=ε S/4 π kd Formulas I
Electric capacity C and two pole plates (i.e. first pressure inductive layer 310 and second pressure inductive layer 320) for forming the electric capacity
Between medium the distance between permittivity ε, polar plate area S and pole plate d about (k is related to permittivity of vacuum normal
Number).When between first pressure inductive layer 310 and second pressure inductive layer 320 distance change (the d values i.e. in Formulas I) when, on
The pressure sensitive electric capacity formed between two layers is stated also to change, and the pressure changed with being applied on touch screen of above-mentioned distance
It is relevant.For example, when the touch screen is under pressure pressing, the spacing of first pressure inductive layer 310 and second pressure inductive layer 320
From diminishing, pressure sensitive electric capacity increases with the increase of pressure.Therefore, can establish the capacitance variation information of capacitance sensor with
The correlation database by force information of touch screen.The touch parameter perpendicular to screen body plane (is touched thus, it is possible to realize
Touch pressure) perceived.In specific signal detection process, foregoing pressure sensitive electricity direct or indirect can must be measured
Hold, foregoing pressure sensitive electric capacity is directly such as measured by appearance certainly or the detection method of double-deck mutual tolerance, or pass through individual layer mutual tolerance
Detection method measure foregoing pressure sensitive electric capacity indirectly.For individual layer mutual tolerance detection method, detection electric capacity can also be established
The correlation database by force information of signal and touch screen, so as to realize that touch pressure perceives.
The unit of the touch screen according to the present invention is described in detail below.
According to an embodiment of the invention, with reference to figure 2, between first pressure inductive layer 310 and second pressure inductive layer 320
With compressible space 400.Compressible space 400 can be able to be first pressure sense when carrying out pressing touch-control to touch screen
Layer 310 and/or second pressure inductive layer 320 is answered to provide the space of deformation.Thus, it is possible to realize according to embodiments of the present invention touch
Control the pressure sensitive function of screen.It will be appreciated to those of skill in the art that the position of compressible space 400 is only in above-mentioned legend
For exemplary description, in actual applications, as long as compressible space 400 is located at first pressure inductive layer 310 and second pressure
Can be that the gap in the touch screen within a module or between multiple modules (is sky between inductive layer 320
Gas), the space within a module or between multiple modules, and the elastomeric material filled with changeability can also be arranged on,
For example, can in compressible space 400 filled and process, gel or porous material.In an embodiment of the present invention, it is compressible
Space 400 height (or the thickness for compressible space 400, in the compressible space along on touch screen above-below direction away from
From the H shown in figure) can be between 0.1~0.4 millimeter, the compressible space 400 between the variant position of identical product
Difference in thickness may remain between 0.02-0.2 millimeters, thereby, it is possible to ensure good homogeneity.By compressible space
400 thickness is set within the above range, it is ensured that is had between first pressure inductive layer and second pressure inductive layer suitable
When spacing serve as deformation space, so as to so that formed pressure sensitive capacitance be suitable to IC detection, avoid signal from overflowing.
According to an embodiment of the invention, cover sheet 100 is arranged on the top of touch screen, so as to for according to of the invention real
The miscellaneous part for applying the touch screen of example provides protection.According to an embodiment of the invention, the specific material of cover sheet 100 is not by spy
Do not limit, those skilled in the art can be selected the material for forming cover sheet 100 according to actual conditions.For example, root
According to the specific embodiment of the present invention, cover sheet 100 can be glass, sapphire and transparent organic membrane material (such as poly- methyl-prop
The polymer organic such as e pioic acid methyl ester film) form.Above-mentioned material wide material sources, it is readily available, tool can be provided for the touch screen
There is the protection of sufficient intensity, and light transmission is good, does not interfere with the display function of the touch screen.
It should be noted that in the present invention, the particular type of display module 200 is not particularly limited, liquid can be included
Brilliant display unit, such as can be the display screen of IPS, TN, STN mode, or organic luminescence display unit, such as can be with
For active organic luminescence display unit (AMOLED) or passive organic light-emitting display unit (PMOLED).Above-mentioned display mould
The concrete composition and structure for all parts that group 200 includes are not particularly limited, as long as display function can be realized.
Below according to embodiments of the invention, the position set to first pressure inductive layer 310, second pressure inductive layer 320
Put and the parameter such as the size of electrode, shape is described in detail.
According to an embodiment of the invention, first pressure inductive layer 310 has multiple first pressure induction electrodes, second pressure
Inductive layer 320 can also have multiple second pressure induction electrodes.Thus, it is possible to strengthen sensitive journey of the touch screen to pressure
Degree.
According to an embodiment of the invention, there is optical filter 210, first pressure inductive layer 310 with reference to figure 4, display module 200
It is arranged on optical filter 210.For example, first pressure inductive layer 310 can be attached on the lower surface of optical filter 210.Thus,
Can the easy smooth degree that first pressure inductive layer 310 is improved by more smooth optical filter 210, so as to heighten pressure
The accuracy of power sensing.According to an embodiment of the invention, now multiple first pressure induced electricities in first pressure inductive layer 310
The gross area of pole can be 5~80mm2.According to an embodiment of the invention, liquid crystal display 220 is included in display module 200
When, it is also necessary to including back light unit 230 to realize display function.Wherein, chase 240 can be included in back light unit 230.This
When, chase 240 can be used as second pressure inductive layer 320.Thus, it is possible to easy improved by more smooth optical filter 210
The smooth degree of first pressure inductive layer 310, so as to heighten the accuracy of pressure sensitive, utilize chase 240 as second
Pressure sensitive layer 320, be advantageous to simplify the structure of the touch screen, simplify preparation technology, reduce production cost.Now, the first pressure
The distance of power inductive layer 310 and second pressure inductive layer 320 can be 0.6~1.3cm, on first pressure inductive layer 310
The gross area of first pressure induction electrode can be 1~40mm2.Thus, it is possible to by adjust first pressure inductive layer 310 and
The gross area of the distance between second pressure inductive layer 320 and first pressure induction electrode, ensure the pressure sensitive to be formed electricity
Capacitance detects suitable for IC, avoids signal from overflowing.
When including organic luminescence display unit in the display module 200, according to an embodiment of the invention, can suitably subtract
The distance of small first pressure inductive layer 310 and second pressure inductive layer 320, for example, according to a particular embodiment of the invention, should
Distance can be 0.1~0.8cm.Thus, it is possible to by adjusting first pressure inductive layer 310 and second pressure inductive layer 320
The distance between and first pressure induction electrode the gross area, ensure the pressure sensitive capacitance to be formed suitable for IC detect, keep away
Exempt from signal spilling.
According to an embodiment of the invention, can also have reflector plate 250, first pressure sense with reference to figure 5, back light unit 230
Layer 310 is answered to be arranged on the reflector plate 250 of back light unit 230, for example, first pressure inductive layer 310 can be attached to
In the upper surface (not shown) of reflector plate 250 or lower surface.Second pressure inductive layer 320 can be for chase 240 (in figure not
Show).Thus, it is possible to the easy smooth degree that first pressure inductive layer 310 is improved by more smooth reflector plate 250, from
And the accuracy of pressure sensitive can be heightened, and by the use of chase 240 as second pressure inductive layer 320, be advantageous to simplify this and touch
The structure of screen is controlled, simplifies preparation technology, reduces production cost.When using chase 240 as second pressure inductive layer 320, the
The first pressure induction electrode gross area in one pressure sensitive layer 310 can be 1~40mm2, first pressure inductive layer 310 and
The distance of second pressure inductive layer 320 can be 0.1~0.4mm.Thus, it is possible to by adjust first pressure inductive layer 310 with
And the gross area of the distance between second pressure inductive layer 320 and first pressure induction electrode, ensure the pressure sensitive to be formed
Capacitance detects suitable for IC, avoids signal from overflowing.
According to an embodiment of the invention, there can also be public electrode 260 with reference to figure 6, display module 200.It can use
Public electrode 260 applies 2~6V voltage to public electrode 260, senses first pressure as second pressure inductive layer 320
Layer 310 forms double-deck mutual tolerance type structure with public electrode 260.The position of the (not shown) of first pressure inductive layer 310 not by
Especially limitation, can be arranged between cover sheet 100 and display module 200, be integrated within display module 200, or
It is arranged at the lower section of display module 200.The distance of first pressure inductive layer 310 and second pressure inductive layer 320 can be 0.6~
1.3cm.According to an embodiment of the invention, the gross area of first pressure induction electrode can be 1~500mm2.Thus, it is possible to protect
The pressure sensitive electric capacity formed between card first pressure inductive layer and second pressure inductive layer is in appropriate number range,
So as to so that the pressure sensitive capacitance formed avoids signal from overflowing suitable for IC detections.
According to an embodiment of the invention, can also include with reference to figure 7F, in first pressure inductive layer 310 sensor circuit 30 with
And drive circuit 40, second pressure inductive layer 320 complete pressure sensitive as ground connection reference electrode using the mutual capacitance type of individual layer.
Now, sensor circuit 30 and the coupling of drive circuit 40 form mutual tolerance electric capacity, now, when pressing the touch screen, first
Pressure sensitive layer 310 deforms upon, the increase of the distance between sensor circuit 30 and drive circuit 40, sensor circuit 30 after pressing
And the mutual tolerance electric capacity (C between drive circuit 401) diminish.Simultaneously as first pressure inductive layer 310 and second pressure sense
The distance between layer 320 is answered also to be changed, therefore the electric capacity between induction electrode 30 and second pressure inductive layer 320
(C2), the electric capacity between driving electrodes 40 and second pressure inductive layer 320 changes (C with pressure3).Now, second pressure
Inductive layer 320 can be used as reference, pass through counting statistics C1、C2And C3In the front and rear change of pressing, the COMPREHENSIVE CALCULATING touch screen
Suffered pressure, so as to improve the pressure sensitive order of accuarcy of the touch screen.At this point it is possible to by controlling first pressure
The size of electrode or the distance between sensor circuit 30 and drive circuit 40, make the initial of mutual tolerance electric capacity in inductive layer 310
80% of capacitance not less than the IC detection capacitance upper limits.Thus, it is possible to ensure the sensor circuit 30 of first pressure inductive layer 310
And the mutual tolerance electric capacity formed between drive circuit 40 is within appropriate number range, so as to so that pressing after first pressure
The mutual tolerance electric capacity that power inductive layer 310 exports detects suitable for IC, and the capacitance for avoiding being formed after pressing is too small and reduces the spirit of detection
Quick degree.Specifically, the distance between sensor circuit 30 and drive circuit 40 (D shown in figure) can be 0.04~
0.15mm.Thus, it is possible between ensureing the sensor circuit and drive circuit of first pressure inductive layer there is appropriate spacing to fill
Work as deformation space, so as to so that the electric capacity that first pressure inductive layer exports after pressing is formed suitable for IC detections after avoiding pressing
Capacitance it is too small and reduce detection sensitivity level.
It should be noted that the specific material and concrete structure of composition first pressure inductive layer 310 are not particularly limited,
Those skilled in the art can be designed according to actual conditions.For example, according to an embodiment of the invention, first pressure inductive layer
310 can be by ITO, metal grill (metal mesh), development conducting film, graphene layer (such as Cu, Ag plating for being coated with metal
Layer, or metal organic ink, such as silver paste, copper are starched) formed.The specific set-up mode of first pressure inductive layer 310 is not yet
It is particularly limited, for example, according to an embodiment of the invention, can be by needing to set the position plating of first pressure inductive layer to lead
Electric layer, the first pressure inductive layer with predetermined electrode pattern is then formed by modes such as etchings, can also directly pass through silk
Wire mark scopiform is into first pressure inductive layer.In some embodiments of the invention, first pressure inductive layer can be formed in flexibility
Base material (transparent organic film material of such as PET, PC etc.), can also form groove on flexible parent metal, first pressure is sensed
Layer is arranged in groove.
It will be appreciated to those of skill in the art that in order to improve pressure sensing effect, with reference to figure 7A and Fig. 7 B, first
The surface of pressure sensitive layer 310 can have multiple pressure sensitive electrodes 10, and multiple pressure sensitive electrodes 10 form electrod-array.
Independent detection is carried out to the touch-control pressure of the diverse location of the touch screen using electrod-array, the inspection of electronic equipment pressure can be improved
The sensitivity level of survey.Specifically, multiple pressure sensitive electrodes 10 can independently form pressure between second pressure inductive layer
Power inductance capacitance, to react the capacitance of the touch-control screen surfaces different loci.For example, with reference to figure 7A, first pressure inductive layer
It can be made up of multiple regularly arranged electrodes 10.By adjusting the area of each hollow out electrode, each electrode can be adjusted
Original capacitance value (i.e. touch-control screen surfaces are not by capacitance during touch control operation).Utilize above-mentioned multiple regularly arranged hollow out electricity
Pole covering is needed to carry out pressure sensing region, it is possible to achieve the test point of monitored area is uniformly distributed.Those skilled in the art
, it is understood that concrete shape, arrangement mode and the quantity of above-mentioned multiple pressure sensitive electrodes 10 are not particularly limited, can
To be designed according to specific requirement of the touch screen for pressure sensing susceptibility.For example, with reference to figure 7B, multiple feelings of stress
Answer the area of electrode 10 can not be all equal.Because the touch screen diverse location is by the touch-control pressure perpendicular to touch screen
Caused deformation degree is different, therefore the area of multiple pressure sensitive electrodes 10 is not all equal is advantageous to utilize electrode area
The initial capacitance of diverse location is adjusted, so as to be advantageous to strengthen the pressure sensitive sensitivity level of each position on the touch screen.Example
Such as, according to a particular embodiment of the invention, because deformation of the touch screen middle position when being under pressure touch-control is compared with touch screen side
It is bigger at edge, the pressure positioned at touch-control platen edge can be less than positioned at the pressure sensitive electrode 10B of touch screen middle position area
Power induction electrode 10A area.
In order to further improve the pressure touch inductive effects of the touch screen, according to an embodiment of the invention, first pressure
Inductive layer can also further have shielding line 20.Specifically, pressure sensitive electrode 10 can be surround with reference to figure 7C, shielding line 20
Set.Thus, it is possible to the signal between adjacent pressure sensitive electrode is shielded using the shielding line to prevent from interfering with each other, so as to
Sensitivity and order of accuarcy of the first pressure inductive layer for pressure sensitive can be improved.
According to an embodiment of the invention, it is mutual when being formed between first pressure inductive layer 310 and second pressure inductive layer 320
During appearance type electric capacity, with reference to figure 7D, first pressure inductive layer 310 can have the pressure sensitive of the electrode pattern of multiple strip hollow outs
Electrode 10 (10A-10D in figure), can be using first pressure inductive layer 310 as inductive layer, and second pressure inductive layer 320 is then made
To drive layer.With reference to figure 7E, second pressure inductive layer 320 can have and the pressure sensitive electricity in first pressure inductive layer 310
10 vertically disposed electrode of pole, as driving electrodes 40, to realize the pressure sensitive function of the touch screen.Need what is illustrated
It is that the structure of first pressure inductive layer 310 or second pressure inductive layer 320 shown in Fig. 7 D and Fig. 7 E is merely illustrative
Property, quantity, shape, arrangement mode and the connection of electrode in first pressure inductive layer 310 or second pressure inductive layer 320
Mode is not particularly limited, as long as formation can be coupled between first pressure inductive layer 310 and second pressure inductive layer 320
Mutual tolerance type electric capacity.It is for instance possible to use man-to-man coupled modes, 1 pressure sensitive in first pressure inductive layer 310
Electrode couples as sensor circuit with 1 pressure sensitive electrode in second pressure inductive layer 320 (as drive circuit), so as to
It can realize and pressure subregion sensing is carried out to the touch screen.Or one-to-many coupled modes, i.e. first pressure sense can be used
A pressure sensitive electrode in layer 310 is answered as multiple pressure sensitives electricity in induction electrode and second pressure inductive layer 320
Pole (as drive circuit) couples, or multiple pressure sensitive electrodes in first pressure inductive layer 310 are as sensor circuit and the
A pressure sensitive electrode (as drive circuit) coupling in two pressure sensitive layers 320.
According to an embodiment of the invention, in the touch screen, pressure sensitive electrode 10 (including first pressure induction electrode with
And second pressure induction electrode) can be polygonal electrodes, random electrode block or hollow out electrode.For example, pressure sensitive is electric
Extremely can be the regular polygons such as square, or there is the electrode of irregular shape.Specifically, with reference to figure 8A and figure
8B, pressure sensitive electrode 10 can be rhombus, can also carry out hollow processing to pressure sensitive electrode 10.It should be noted that
Pierced pattern shown in Fig. 8 B is exemplary only, it is impossible to is interpreted as limitation of the present invention.That is hollow out electrode 10 is engraved
The number of dummy section can not be 1, the shape of void region in addition to it can be square, can also be rectangle, circle,
Triangle etc., for example, according to an embodiment of the invention, pressure sensitive electrode 10 can have the hollow out shape shown in Fig. 8 C
Shape.Those skilled in the art can also be according to requirement of the touch-control screen surfaces for pressure touch sensitivity, to pressure sensitive electricity
Pole figure case is designed, and thus, is easy to regulate and control the initial capacitance value of the pressure sensitive electrode, and advantageously form regularly arranged
Array electrode, and then preparation technology can be simplified.
In another aspect of this invention, the present invention proposes a kind of electronic equipment.With reference to figure 9, the electronic equipment 1000 wraps
Previously described touch screen 1100 and the center (not shown) for supporting the touch screen 1100 are included, wherein, with reference to figure 3
And Fig. 5, center 500 form second pressure inductive layer 320.Thus, second pressure inductive layer 320 is set without extra, favorably
In the thickness for reducing the electronic equipment.It should be noted that the touch screen 1100 in the electronic equipment has previously described touch
The whole features and advantage of control screen 1100, will not be repeated here.
According to an embodiment of the invention, when first pressure inductive layer 310 is arranged on optical filter 210, first pressure sensing
The distance of layer 310 and second pressure inductive layer 320 can be 0.6~1.3cm, multiple the in first pressure inductive layer 310
The gross area of one pressure sensitive electrode can be 5~80mm2.Thus, be advantageous to simplify the structure of the electronic equipment, simplify and prepare
Technique, reduce production cost.According to an embodiment of the invention, there can also be reflector plate 250 with reference to figure 5, back light unit 230,
First pressure inductive layer 310 can be arranged on the reflector plate 250 of back light unit 230, for example, can be by first pressure inductive layer
310 are attached on the upper surface (not shown) of reflector plate 250 or lower surface.According to an embodiment of the invention, first pressure
The gross area of first pressure induction electrode in inductive layer 320 can be 1~80mm2, first pressure inductive layer 310 and second
The distance of pressure sensitive layer 320 can be 0.1~0.4mm.Thus, it is possible to by adjusting first pressure inductive layer 310 and
The gross area of the distance between two pressure sensitive layers 320 and first pressure induction electrode, ensure the pressure sensitive electric capacity to be formed
Value is suitable to IC and detected, and avoids signal from overflowing.
It should be noted that such as second pressure inductive layer 320 is made up of center 500, and because structure design needs, center
500 subregion needs borehole, therefore now needs to enter second pressure inductive layer 320 according to the borehole region of center 500
The related adjustment of row, to prevent the pressure sensitive capacitance at borehole abnormal.
According to an embodiment of the invention, the electronic equipment can further include touch sensitive layer.Touch sensitive layer can
With with touch-control screen structure commonly used in the art, for example, can be external hanging type (including but is not limited to OGS, GF, GFF, GF2 etc.),
The touch-control screen structure of the modes such as on-cell, in-cell.
It should be noted that above-described embodiment is exemplary, it is impossible to is interpreted as limitation of the present invention, the skill of this area
Art personnel above-described embodiment can be changed, be changed within the scope of the invention, replaced and modification.
In the description of this specification, the description of reference term " one embodiment ", " another embodiment " etc. means to tie
Specific features, structure, material or the feature for closing embodiment description are contained at least one embodiment of the present invention.At this
In specification, identical embodiment or example are necessarily directed to the schematic representation of above-mentioned term.Moreover, the tool of description
Body characteristicses, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.This
Outside, in the case of not conflicting, those skilled in the art by the different embodiments described in this specification or can show
Example and the feature of different embodiments or example are combined and combined.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (16)
- A kind of 1. touch screen, it is characterised in that including：Cover sheet；Display module, the display module are arranged at below the cover sheet；AndPressure sensitive structure, the pressure sensitive structure include first pressure inductive layer and second pressure inductive layer, and described One pressure sensitive layer and second pressure inductive layer electrically connect and form pressure sensitive electric capacity, the pressure sensitive electric capacity it is initial 50% of capacitance no more than the IC detection capacitance upper limits.
- 2. touch screen according to claim 1, it is characterised in that the first pressure inductive layer and second pressure sensing There is compressible space between layer.
- 3. touch screen according to claim 2, it is characterised in that the height of the compressible space is 0.1~0.4mm.
- 4. touch screen according to claim 1, it is characterised in that the first pressure inductive layer has multiple first pressures Induction electrode,Optionally, the second pressure inductive layer has multiple second pressure induction electrodes.
- 5. touch screen according to claim 4, it is characterised in that the display module has optical filter, first pressure Power inductive layer is arranged on the optical filter, and the first pressure induction electrode gross area is 5~80mm2。
- 6. touch screen according to claim 4, it is characterised in that the display module has a back light unit, and described first Pressure sensitive layer is arranged on the reflector plate of the back light unit, and the second pressure inductive layer is the iron of the back light unit Frame, the first pressure induction electrode gross area are 1~80mm2。
- 7. touch screen according to claim 4, it is characterised in that the display module has optical filter and backlight list Member, the first pressure inductive layer are arranged on the optical filter, and the second pressure inductive layer is the iron of the back light unit Frame, the first pressure induction electrode gross area are 1~40mm2。
- 8. touch screen according to claim 1 or 2, it is characterised in that the display module has a back light unit, and described One pressure sensitive layer is arranged on the reflector plate of the back light unit, and the second pressure inductive layer is the iron of the back light unit The distance of frame, the first pressure inductive layer and the second pressure inductive layer is 0.1~0.4mm.
- 9. touch screen according to claim 1 or 2, it is characterised in that the display module has an optical filter, and described first Pressure sensitive layer is arranged on the optical filter, the second pressure inductive layer be the back light unit chase, described first The distance of pressure sensitive layer and the second pressure inductive layer is 0.6~1.3cm.
- 10. touch screen according to claim 1 or 2, it is characterised in that the display module has public electrode, described Second pressure inductive layer is the public electrode, and the distance of the first pressure inductive layer and the second pressure inductive layer is 0.6~1.3cm.
- 11. touch screen according to claim 4, it is characterised in that the display module has a public electrode, and described second Pressure sensitive layer is the public electrode, and the first pressure induction electrode gross area is 1~500mm2。
- 12. touch screen according to claim 1 or 2, it is characterised in that the first pressure inductive layer includes sensor circuit And drive circuit, the distance between the sensor circuit and the drive circuit are 0.04~0.15mm.
- 13. touch screen according to claim 12, it is characterised in that the sensor circuit and drive circuit coupling Form mutual tolerance electric capacity, 80% of initial capacitance value not less than the IC detection capacitance upper limits of the mutual tolerance electric capacity.
- 14. a kind of electronic equipment, it is characterised in that including the touch screen described in any one of claim 1~13 and for propping up The center of the touch screen is supportted, the center forms the second pressure inductive layer.
- 15. electronic equipment according to claim 14, it is characterised in that first pressure inductive layer is arranged on optical filter When, the first pressure induction electrode gross area is 5~80mm2；When first pressure inductive layer is arranged on reflector plate, the first pressure induction electrode gross area is 1~80mm2。
- 16. electronic equipment according to claim 14, it is characterised in that described in being arranged at when the first pressure inductive layer When on optical filter, the distance of the first pressure inductive layer and the second pressure inductive layer is 0.6~1.3cm；When the first pressure inductive layer is arranged on the reflector plate of the back light unit, the first pressure inductive layer and The distance of the second pressure inductive layer is 0.1~0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610511990.4A CN107562292A (en) | 2016-07-01 | 2016-07-01 | Touch screen and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610511990.4A CN107562292A (en) | 2016-07-01 | 2016-07-01 | Touch screen and electronic equipment |
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| CN107562292A true CN107562292A (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610511990.4A Pending CN107562292A (en) | 2016-07-01 | 2016-07-01 | Touch screen and electronic equipment |
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| CN108304093A (en) * | 2018-01-30 | 2018-07-20 | 合肥京东方显示光源有限公司 | A kind of touch panel and preparation method thereof, touch control display apparatus |
| CN108762587A (en) * | 2018-02-12 | 2018-11-06 | 敦泰科技(深圳)有限公司 | Capacitive pressure detection components |
| CN110032302A (en) * | 2019-03-21 | 2019-07-19 | 深圳曦华科技有限公司 | A kind of touch detecting method |
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| KR20160034240A (en) * | 2015-12-29 | 2016-03-29 | 주식회사 하이딥 | Smartphone |
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| CN102479013A (en) * | 2010-11-26 | 2012-05-30 | 奇美电子股份有限公司 | Method for setting driving signals of electrodes of touch screen and driving method of touch screen |
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Effective date of registration: 20210220 Address after: 231323 Building 1, precision electronics industrial park, Hangbu Town, Shucheng County, Lu'an City, Anhui Province Applicant after: Anhui jingzhuo optical display technology Co.,Ltd. Address before: 330013 Huang Jia Hu West Road, Nanchang Economic Development Zone, Jiangxi Applicant before: Nanchang OFilm Tech. Co.,Ltd. |
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