CN107562243A - Touch screen and electronic equipment - Google Patents
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- CN107562243A CN107562243A CN201610511735.XA CN201610511735A CN107562243A CN 107562243 A CN107562243 A CN 107562243A CN 201610511735 A CN201610511735 A CN 201610511735A CN 107562243 A CN107562243 A CN 107562243A
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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 the display module includes display unit and the back light unit being arranged on below the display unit, and the back light unit has glue frame or chase；Center；Pressure sensitive layer, the pressure sensitive layer are arranged between the display unit and the back light unit；And ground plane, the ground plane electrically connect with the pressure sensitive layer and form pressure sensitive electric capacity, the ground plane is the ground shield in the center, the chase or the display module.Thus, it is possible to improve the integrated horizontal of display module, ground plane is set using inherent structure inside display module, is advantageous to reduce the thickness of the touch screen.The touch screen has the advantages that preparation technology is simple, touch screen flatness is good, sensing is sensitive.
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, having the touch screen of pressure sensitive function at present, generally existing preparation technology is complicated, pressure sensitive susceptibility
The problems such as having much room for improvement.
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 the display module includes aobvious
Show unit and the back light unit being arranged on below the display unit, and the back light unit has glue frame or chase；In
Frame；Pressure sensitive layer, the pressure sensitive layer are arranged between the display unit and the back light unit；And ground connection
Layer, the ground plane electrically connect with the pressure sensitive layer and form pressure sensitive electric capacity, and the ground plane is the center, institute
State the ground shield in chase or the display module.Thus, it is possible to improve the integrated horizontal of display module, display is utilized
Module internal inherent structure sets ground plane, is advantageous to reduce the thickness of the touch screen.The touch screen have preparation technology it is simple,
The advantages that touch screen flatness is good, sensing is sensitive.
According to an embodiment of the invention, there is compressible space between the pressure sensitive layer and the ground plane.In reality
Border in use, with the difference perpendicular to screen body plane touch-control dynamics different degrees of deformation can occur for pressure sensitive layer, so as to
So that the electric capacity between pressure sensitive layer and ground plane changes with the change of distance between two layers, compressible space can be
Pressure sensitive layer provides the space to deform, and then the touch screen can perceive the change of the touch-control pressure on diverse location,
So as to realize pressure sensitive function.
According to an embodiment of the invention, the ground plane is the center, and the center has borehole area, soft using algorithm
Part compensates optimization processing to the pressure sensitive electric capacity at the borehole area.Thus, it is possible to avoid the pressure in borehole area
Induced electricity capacitance is influenceed by borehole and causes the pressure sensitive at this to detect data exception.
According to an embodiment of the invention, the touch screen further comprises：Screen layer, the screen layer are located at the feeling of stress
Answer the upper surface of layer.Thus, it is possible to influence of other electrode layers for pressure sensitive layer in touch screen is shielded using the screen layer,
So as to improve sensitivity and order of accuarcy of the pressure sensitive layer for pressure sensitive.
According to an embodiment of the invention, the conductive material phase of the conductive material of the screen layer and the pressure sensitive layer
Together.Thus, it is possible to further simplify preparation technology, production cost is reduced.
According to an embodiment of the invention, the touch screen further comprises：Substrate, the screen layer and the pressure sensitive layer
It is respectively formed in the upper and lower surface of the substrate.Thus, it is possible to provided reliably for screen layer and pressure sensitive layer
Mechanical support, it is easy to integrate on pressure sensitive layer and screen layer, so as to simplify the preparation technology of the touch screen,
Degree of integration is improved, is advantageous to reduce the volume of touch screen according to embodiments of the present invention.
According to an embodiment of the invention, the thickness of the substrate is 10-150 μm.Thus, it is possible to ensure for screen layer with
And on the premise of pressure sensitive layer provides enough mechanical supports, the thickness of substrate is reduced, so as to be advantageous to reduce according to this hair
The volume of the touch screen of bright embodiment.
According to an embodiment of the invention, the screen layer, the substrate and the pressure sensitive layer are by transparent material
Formed.Thus, it is possible to while pressure sensitive touch-control is realized, the display effect of display module is not influenceed.
In another aspect of this invention, the present invention proposes a kind of electronic equipment.According to an embodiment of the invention, the electronics
Equipment includes foregoing touch screen.By the use of previously described touch screen as the screen of electronic equipment, difference can be used
Touch-control dynamics carries out touch-control to screen and electronic equipment is controlled to realize.Due to the electronic equipment include it is previously described
Touch screen, therefore the electronic equipment has whole features and advantage possessed by previously described touch screen, it is no longer superfluous herein
State.For synthesis, the electronic equipment has the advantages that pressure touch susceptibility is high, preparation technology is simple.
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 structural representation of display unit according to an embodiment of the invention；
Fig. 5 A- Fig. 5 F show the electrode structure schematic diagram of pressure sensitive layer according to embodiments of the present invention；
Fig. 6 A- Fig. 6 H show the structural representation of pressure sensitive layer according to an embodiment of the invention；
Fig. 7 A- Fig. 7 D show the structural representation of pressure sensitive layer in accordance with another embodiment of the present invention；
Fig. 8 shows the structural representation of the pressure sensitive layer according to another embodiment of the invention；
Fig. 9 A-9B show pressure sensitive electrode shape schematic diagram according to embodiments of the present invention；
Figure 10 shows the structural representation of pressure sensitive layer according to an embodiment of the invention, substrate and screen layer
Figure；And
Figure 11 shows the structural representation of electronic equipment according to an embodiment of the invention.
Description of reference numerals：
100：Cover sheet；
210：Display unit；230：Upper polaroid；240：Colored filter；250：Liquid crystal layer；260：Matrix base plate；270：
Down polaroid
220：Back light unit；50：Chase
310：Pressure sensitive layer；320：Ground plane；10：Pressure sensitive electrode；20：Shielding line；30：Induction electrode；40：Drive
Moving electrode
400：Compressible space
500：Screen layer；600：Substrate；700：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 the art such as pressure sensitive layer, ground plane isostructural " upper surface ", " top "
Language refers in particular in actual use, and the equipment such as touch screen or structure pass through touch or pressure touch towards the side of user, i.e. user
Implement the side of operation to touch screen or electronic equipment.
In the first aspect of the present invention, the present invention proposes a kind of touch screen.Specifically, with reference to 1~Fig. 3 of figure, the touch-control
Screen includes but is not limited to：Cover sheet 100, display module, center 700, pressure sensitive layer 310 and ground plane 320.Wherein,
Display module is arranged on the lower surface of cover sheet 100, and display module includes display unit 210 and back light unit 220, feeling of stress
Layer 310 is answered to be arranged between display unit 210 and back light unit 220, pressure sensitive layer 310 is coupled with ground plane 320 and shape
Into pressure sensitive electric capacity, ground plane 320 can be for the ground shield in center 700, chase 50 or display module (in figure not
Show).When carrying out touch control operation to the touch screen, at least one of pressure sensitive layer 310 and ground plane 320 can be due to touching
Governor pressure and deform (do not deformed when ground plane 320 is chase 50 or center 700, when ground plane 320 for ground connection
Deformed during screen layer), so as to cause the electric capacity at touch point between pressure sensitive layer 310 and ground plane 320 with touch-control
Pressure changes, so as to realize pressure sensitive.Thus, it is possible to improve the integrated horizontal of display module 200, display is utilized
Module internal inherent structure sets ground plane 320, is advantageous to reduce the thickness of the touch screen.Also, pressure sensitive layer 310 is set
Put between display unit 210 and back light unit 220, be advantageous to using the more smooth substrate in the lower surface of display unit 210,
Improve the smooth degree of pressure sensitive layer 310.And pressure sensitive layer 310 be arranged on display unit 210 and back light unit 220 it
Between can ensure it is closer to the distance between pressure sensitive layer 310 and ground plane 320, in depressed deform upon, therebetween
Electric capacity it is more obvious with pressure change, be advantageous to improve the pressure sensitive sensitivity of the touch screen.Generally speaking, the touch screen
Have the advantages that preparation technology is simple, touch screen flatness is good, sensing is sensitive.It will be appreciated to those of skill in the art that it is
The actual use function of the touch screen is realized or improves, the touch screen can also include conventional portion possessed by other touch screens
Part.The particular type and set-up mode of above-mentioned conventional components can be type and set-up mode commonly used in the art,
This is repeated no more.
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 pressure sensitive layer 310 and ground plane 320 can be with cover sheets 100
Deformed upon together with structures such as display modules, the electric capacity calculation formula according to Formulas I：
C=ε S/4 π kd Formulas I
Jie of medium between electric capacity C and two pole plates (i.e. pressure sensitive layer 310 and ground plane 320) for forming the electric capacity
The distance between electric constant ε, polar plate area S and pole plate d is about (k is the constant related to permittivity of vacuum).Work as feeling of stress
Answer between layer 310 and ground plane 320 distance change (the d values i.e. in Formulas I) when, the pressure sensitive that is formed between above-mentioned two layers
Electric capacity also changes, and the change of above-mentioned distance is relevant with the pressure being applied on touch screen.Therefore, electric capacity biography can be established
The capacitance variation information of sensor and the correlation database by force information of touch screen.Thus, it is possible to realize to perpendicular to screen
The touch parameter (i.e. touch pressure) of body plane is perceived.In specific signal detection process, can be direct or indirect
Foregoing pressure sensitive electric capacity is measured, such as by directly measuring foregoing pressure sensitive from the detection method of appearance or double-deck mutual tolerance
Electric capacity, or foregoing pressure sensitive electric capacity is measured by the detection method of individual layer mutual tolerance indirectly.For individual layer mutual tolerance detection method,
The correlation database by force information of detection capacitance signal and touch screen can also be established, so as to realize touch pressure sense
Know.
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 and Fig. 3, have between pressure sensitive layer 310 and ground plane 320
Compressible space 400.Compressible space 400 can be able to be that pressure sensitive layer 310 carries when carrying out pressing touch-control to touch screen
For the space of deformation.Thus, it is possible to realize the pressure sensitive function of touch screen according to embodiments of the present invention.People in the art
Member, in actual applications, can, it is understood that the exemplary only description in the position of compressible space 400 in above-mentioned legend
As long as compression stroke 400 between pressure sensitive layer 310 and ground plane 320, can be a module in the touch screen
Within or multiple modules between gap (be air), can also be arranged within a module or between multiple modules
Space, and filled with changeability elastomeric material, for example, can in compressible space 400 filled and process, gel or more
Porous materials.In an embodiment of the present invention, the thickness of compressible space 400 can be between 0.05-0.5 millimeters, identical product
The difference in thickness of compressible space 400 between variant position may remain between 0.02-0.2 millimeters, and thereby, it is possible to protect
Demonstrate,prove good homogeneity.
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- carbonic acid
The polymer organic such as ester, polymethyl methacrylate film) form.Above-mentioned material wide material sources, it is readily available, can be touched for this
Control screen provides the protection with 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 unit 210 is not particularly limited, can be IPS,
The display screen of the modes such as TN, STN.For example, with reference to figure 4, according to a particular embodiment of the invention, display unit can also include
The structures such as upper polarisation 230, colored filter 240, liquid crystal layer 250, matrix base plate 260 and down polaroid 270, to realize basis
The display function of the display module of the embodiment of the present invention.The concrete composition for all parts that above-mentioned display unit 210 includes with
And structure is not particularly limited, as long as display function can be realized.
It should be noted that the specific material and concrete structure of decomposition pressure inductive layer 310 are not particularly limited, ability
Field technique personnel can be designed according to actual conditions.For example, according to an embodiment of the invention, pressure sensitive layer 310 can be with
By ITO, metal grill (metal mesh), development conducting film, be coated with metal graphene layer (such as Cu, Ag coating, or
It is metal organic ink, such as silver paste, copper are starched) formed.The specific set-up mode of pressure sensitive layer 310 is also not particularly limited,
For example, according to an embodiment of the invention, can be by needing to set the position of pressure sensitive layer 310 to plate conductive layer, Ran Houtong
The modes such as overetch form the pressure sensitive layer 310 with predetermined electrode pattern, can also directly be formed and pressed by silk-screen printing
Power inductive layer 310.In some embodiments of the invention, pressure sensitive layer 310 can be formed in flexible parent metal (such as PET, PC
Transparent organic film material etc.), groove can also be formed on flexible parent metal, pressure sensitive layer 310 is arranged in groove.Tool
Body, the thickness of pressure sensitive layer 310 can be 0.01-0.3 millimeters.For example, according to a particular embodiment of the invention, work as pressure
When inductive layer 310 is ITO coating, its thickness can be about 10nm；When pressure sensitive layer 310 is flexible PCB (FPC),
Its thickness can be about 300 μm.
According to an embodiment of the invention, ground plane 320 can be the ground connection in center 700, chase 50 or display module
Screen layer.Ground plane 320 is formed using the conductive structure having in the touch screen, cost can be saved, simplifies preparation technology, and
Reduce the thickness of the touch screen.Pressure sensitive layer 310 can form pressure sensitive electricity with the above-mentioned ground plane 320 that can be grounded
Hold.According to some embodiments of the present invention, with reference to figure 5F, the pressure sensitive electrode on pressure sensitive layer 310 can also have more
Individual pressure sensitive electrode, and form mutual capacitance, and pressure sensitive layer respectively as induction electrode 30 and driving electrodes 40, coupling
310 are coupled with ground plane 320, and pressure sensitive electric capacity is formed with ground plane (i.e. ground plane 320).Now, when the touch screen by
During pressed by external force touch-control, pressure sensitive layer 310 is due to deforming upon, the distance between induction electrode 30 and driving electrodes 40 hair
Changing, couple the mutual capacitance (C of formation1) will be changed with pressure；Simultaneously as pressure sensitive layer 310 and ground plane
The distance between 320 are also changed, therefore the electric capacity (C between induction electrode 30 and ground plane 3202), driving electrodes 40
Electric capacity between ground plane 320 changes (C with pressure3).Now, ground plane 320 can be used as reference, pass through calculating
Count C1、C2And C3In the front and rear change of pressing, the pressure suffered by the COMPREHENSIVE CALCULATING touch screen, touched so as to improve this
Control the pressure sensitive order of accuarcy of screen.
It should be noted that when including induction electrode 30 and driving electrodes 40 in pressure sensitive layer 310, institute in Fig. 5 F
The structure of the pressure sensitive layer 310 shown is exemplary only, and those skilled in the art can be according to actual conditions, to feeling of stress
The concrete structure of layer 310 is answered to be designed.
For example, according to one embodiment of present invention, shape can be coupled with multiple drive circuits using a sensor circuit
Mode into mutual capacitance carries out pressure sensitive.With reference to figure 6A, pressure sensitive layer 310 includes welding disking area and element area, member
Part region is arranged on welding disking area, and (B area in Fig. 6 A) is connected with multiple induction electrodes (Rx), multiple drives in welding disking area
Moving electrode (Tx) and multiple earth shield lines (GND), an induction electrode couple to form a mutual tolerance electricity with 6 driving electrodes
Road, first pressure inductive layer include 4 groups of mutual capacitive circuits.Specifically, pressure sensitive layer 310 include 4 induction electrodes (Rx1~
Rx4), each induction electrode couples to form mutual capacitive circuit (Rx4 and Tx1~Tx6 in such as Fig. 5 A) with 6 driving electrodes, i.e., every
One driving electrodes (such as Tx1) couples to form mutual capacitance with a part (Rx4 top) for an induction electrode, each mutual tolerance electricity
Road includes 6 mutual capacitance.The capacitance of the mutual capacitance is relevant with the pressure touch dynamics that the region is subject to, to detect the drive
The touch-control pressure of moving electrode region (a-quadrant shown in Fig. 6 A).Induction electrode and driving electrodes are interdigital electrode.With reference to
Fig. 6 B, the length of each induction electrode (Rx1~Rx4) can be approximate with the length of touch screen, and induction electrode width is less than
Touch screen width, 4 induction electrodes are horizontally arranged to be distributed in pressure sensitive layer 310 (parallel to the width of the touch screen)
On.Thus, it is possible to by setting multiple induction electrodes (Rx) and multiple driving electrodes (Tx), subregion is carried out to the touch screen,
So as to realize the pressure detecting of different zones, to improve the sensitivity level of pressure touch sensing.In this embodiment, using 1
Individual induction electrode couples to form mutual capacitive circuit with 6 driving electrodes, and sets the mode of 4 groups of mutual capacitive circuits, realizes pressure sensitive
Detection.In order to further improve pressure sensitive sensitivity and accuracy, multiple ground connection can also be set on pressure sensitive layer 310
Shielding line (GND).According to an embodiment of the invention, it is every to prevent because induction electrode and driving electrodes are interdigital electrode
Signal interference between the induction electrode of the mutual capacitive circuit of group and each lug boss of driving electrodes, in the pressure sensitive layer
On 310, it can be set interdigital between induction electrode (such as Rx4) and coupled thereto 6 driving electrodes (such as Tx1~Tx6)
The earth shield line of electrode shape.Specifically, with reference to figure 6C, there are 4 induction electrodes on the pressure sensitive layer 310, can be every
Region corresponding to one induction electrode, a pressure shielding line is set, as shown in GND-A~GND-D in figure.Specifically, refer to
Fig. 6 D, the earth shield line (GND) of interdigitated can be utilized, will be spaced between induction electrode (Rx4) and driving electrodes (Tx1)
Open.In addition, in order to prevent the signal between 4 groups of mutual capacitive circuits (Rx1~Rx4) from interfering with each other, with reference to figure 6F and Fig. 6 G, may be used also
To set multiple vertical earth shield lines (GND2~GND4 in Fig. 6 F and Fig. 6 G) on pressure sensitive layer 310.May be used also
To set two earth shield lines (GND1 and GND5 in Fig. 6 F~Fig. 6 H), two earthings on the pressure sensitive layer 310
Wire loop is covered around pressure sensitive layer 310 but non-intersect.The signal of pressure sensitive layer 310 is done thus, it is possible to shield other electrode layers
Disturb, and Electro-static Driven Comb (ESD) structure can be used as, improve the usage safety performance of the touch screen.With reference to figure 6A and Fig. 6 E, on
State multiple induction electrodes (Rx1~Rx4), multiple driving electrodes (Tx1~Tx4, totally 4 groups) and multiple earth shield line (GND1
~GND5；GND-A~GND-D) upper end be arranged on the bottom of welding disking area with mutually disjointing, will pass through welding, coupling
Mutual capacitance is formed, or plays a part of bonding.Between above-mentioned multiple electrodes and shielding line, multiple NC can be reserved and drawn
Pin (Not connected).
According to another embodiment of the invention, pressure sensitive layer 310 can also use a drive circuit and multiple senses
The mode for answering circuit to couple completes pressure sensitive.Specifically, welding disking area and member are included with reference to figure 7A, pressure sensitive layer 310
Part region, element area are arranged on welding disking area, and (F regions in Fig. 7 A) is connected with multiple induction electrodes in welding disking area
(Rx), multiple driving electrodes (Tx) and multiple earth shield lines (GND), a driving electrodes couple shape with 5 induction electrodes
Into a mutual capacitive circuit, pressure sensitive layer 310 includes 4 groups of mutual capacitive circuits.Specifically, pressure sensitive layer 310 includes 4 driving electricity
Pole (Tx1~Tx 4), each driving electrodes coupled with 5 induction electrodes to be formed mutual capacitive circuit (Tx1 and Rx1 in such as Fig. 7 A~
Rx5), i.e., each induction electrode (such as Rx1) couples to form mutual capacitance with a part (Tx1 top) for a driving electrodes,
Each mutually capacitive circuit includes 5 mutual capacitance.The capacitance of the mutual capacitance is relevant with the pressure touch dynamics that the region is subject to, with
Just the touch-control pressure of the driving electrodes region (the E regions shown in Fig. 7 A) is detected.Induction electrode and driving electrodes are fork
Refer to electrode, with reference to figure 7D, multiple lug bosses of driving electrodes (Tx1) and induction electrode (Rx1) are interspersed.With reference to figure 7B,
The length of each driving electrodes (Tx1~Tx4) can be approximate with the length of touch screen, and driving electrodes width is less than touch screen
Width, 4 driving electrodes are horizontally arranged to be distributed on pressure sensitive layer 310 (parallel to the width of the touch screen).Thus,
Subregion can be carried out to the touch screen, by setting multiple induction electrodes (Rx) and multiple driving electrodes (Tx) so as to realize
The pressure detecting of different zones, to improve the sensitivity level of pressure touch sensing.In this embodiment, using 1 driving electricity
Pole couples to form mutual capacitive circuit with 5 induction electrodes, and sets the mode of 4 groups of mutual capacitive circuits, realizes that pressure sensitive detects.In order to
Pressure sensitive sensitivity and accuracy are further improved, multiple earth shield lines can also be set on pressure sensitive layer 310
(FGND).According to an embodiment of the invention, to prevent the signal interference between every group of mutual capacitive circuit, in the pressure sensitive layer 310
On, earth shield line (FGND) can be set between every group of mutual capacitive circuit.On pressure sensitive layer 310 electrostatic can also be set to release
(ESD) structure is put, Electro-static Driven Comb (ESD) structure is made up of two ESD lines, and two ESD wire loops are around pressure sensitive layer 310 but not
It is intersecting.Thus, it is possible to improve the usage safety performance of the touch screen.With reference to figure 7A and Fig. 7 C, above-mentioned multiple induction electrodes
Mutually disjoint ground in (Rx1~Rx20), multiple driving electrodes (Tx1~Tx4) and multiple earth shield lines (FGND) upper end
The bottom of welding disking area is arranged on, will pass through welding, coupling forms mutual capacitance, or plays a part of bonding.Above-mentioned
Between multiple electrodes and shielding line, multiple DUMMY (neutral electrode block) can be reserved to prevent etching from forming above-mentioned electrode
Shi Fasheng etchings deficiency or etching transition.
It will be appreciated to those of skill in the art that in order to improve pressure sensing effect, with reference to figure 5A and Fig. 5 B, pressure
The surface of inductive layer 310 can have multiple pressure sensitive electrodes 10, and multiple pressure sensitive electrodes 10 form electrod-array.Utilize
Electrod-array carries out independent detection to the touch-control pressure of the diverse location of the touch screen, can improve the sensitive journey of pressure detecting
Degree.Specifically, multiple pressure sensitive electrodes 10 can independently form pressure sensitive electric capacity between ground plane, to react
The capacitance of the touch-control screen surfaces different loci.For example, with reference to figure 5A, pressure sensitive layer can be by multiple regularly arranged electrodes
10 are formed.By adjusting the area of each hollow out electrode, original capacitance value (the i.e. touch-control screen surfaces of each electrode can be adjusted
Not by capacitance during touch control operation).Need to carry out using above-mentioned multiple regularly arranged hollow out electrodes coverings pressure sensing
Region, it is possible to achieve the test point of touch screen monitored area is uniformly distributed.It is it will be appreciated to those of skill in the art that above-mentioned more
Concrete shape, arrangement mode and the quantity of individual pressure sensitive electrode 10 are not particularly limited, can according to the touch screen for
The specific requirement of pressure sensing susceptibility is designed.For example, with reference to figure 5B, the areas of multiple pressure sensitive electrodes 10 can be with
It is all inequal.Due to the touch screen diverse location by deformation degree caused by the touch-control pressure perpendicular to touch screen not
Together, thus multiple pressure sensitive electrodes 10 area all it is inequal be advantageous to using electrode area regulation diverse location it is initial
Electric capacity, so as to be advantageous to strengthen the pressure sensitive sensitivity level of each position on the touch screen.For example, according to the specific of the present invention
Embodiment, because deformation of the touch screen middle position when being under pressure touch-control is bigger compared with touch screen edge, positioned at touch screen
The pressure sensitive electrode 10B of middle position area can be less than the area of the pressure sensitive electrode 10A positioned at touch-control platen edge.
In order to further improve the pressure touch inductive effects of the touch screen, according to an embodiment of the invention, pressure sensitive
Layer can also further have shielding line 20.Specifically, can be set with reference to figure 5C, shielding line 20 around pressure sensitive electrode 10
Put.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
To improve sensitivity and order of accuarcy of the pressure sensitive layer for pressure sensitive.
According to an embodiment of the invention, when forming mutual tolerance type electric capacity between pressure sensitive layer 310 and ground plane 320,
With reference to figure 5D, pressure sensitive layer 310 can have (the 10A- in figure of pressure sensitive electrode 10 of the electrode pattern of multiple strip hollow outs
10D), can be using pressure sensitive layer 310 as inductive layer, and ground plane 320 is then as driving layer.With reference to figure 5E, ground plane 320
Can have with the 10 vertically disposed electrode of pressure sensitive electrode in pressure sensitive layer 310, as driving electrodes 40, so as to reality
The now pressure sensitive function of the touch screen.It should be noted that pressure sensitive layer 310 shown in Fig. 5 D and Fig. 5 E or
The structure of ground plane 320 is exemplary only, the quantity of electrode, shape, arrangement in pressure sensitive layer 310 or ground plane 320
Mode and connected mode are not particularly limited, as long as formation can be coupled between pressure sensitive layer 310 and ground plane 320
Mutual tolerance type electric capacity.It is for instance possible to use man-to-man coupled modes, 1 pressure sensitive electrode in pressure sensitive layer 310
Couple (as drive circuit) with 1 electrode in ground plane 320 as sensor circuit, the touch screen is entered so as to realize
Row pressure subregion senses.Or one-to-many coupled modes, i.e., a pressure sensitive in pressure sensitive layer 310 can be used
Electrode couples as induction electrode with the multiple electrodes in ground plane 320 (as drive circuit), or in pressure sensitive layer 310
Multiple pressure sensitive electrodes couple as sensor circuit with an electrode in ground plane 320 (as drive circuit).
For example, according to a particular embodiment of the invention, pressure sensitive layer 310 is used as induction electrode, and ground plane 320 is as drive
Moving electrode.Specifically, there can be the pressure sensitive electricity that multiple rectangular electrodes lines are formed with reference to figure 8, on pressure sensitive layer 310
Pole, multiple pressure sensitive electrodes form electrod-array, are distributed on pressure sensitive layer 310.Above-mentioned multiple pressure sensitive electrodes
Motor lines lead to welding disking area with mutually disjointing and welded.
According to other embodiments of the present invention, with reference to figure 10, when being not provided with shielding line 20 on pressure sensitive layer 310, or
When shielding line 20 is not enough to shield remaining electrode structure to the signal interference of pressure sensitive electrode 10, the touch screen can also enter one
Step includes screen layer 500 and substrate 600.Specifically, according to an embodiment of the invention, screen layer 500 and pressure sensitive layer
310 can be respectively arranged at the upper surface and lower surface of substrate 600, and strong electromagnetic shielding is provided for pressure sensitive layer 310,
So as to improve the pressure sensitive sensitivity of the touch screen and order of accuarcy.In the preparation process of the touch screen, only need
Substrate 600 containing screen layer 500 and pressure sensitive layer 310 is attached to the lower surface of cover sheet 100, according still further to tradition
Touch screen preparation technology, the cover sheet 100 that this is integrated with to pressure sensitive layer 310 assembled with other modules, you can
Obtain touch screen according to embodiments of the present invention.
Specifically, according to an embodiment of the invention, substrate 600 can be by the optics such as PET, glass, PMMA, COP, COC, PC
Transparent material is formed, and screen layer 500 can be to set whole face ITO in the one side for needing to set screen layer 500 in substrate 600,
A plurality of ITO lines can be set in the relevant position of substrate 600, the spacing for the two ITO lines that are connected can be no more than 1mm；Or
Screen layer 500 according to embodiments of the present invention can be formed using metal grill, development conducting film and the coat of metal.Base
The thickness of plate 600 can be 10-150 μm.Thus, it is possible to ensureing to provide enough for screen layer 500 and pressure sensitive layer 310
Mechanical support on the premise of, reduce substrate 600 thickness, so as to be advantageous to reduce touch screen according to embodiments of the present invention
Volume.
According to an embodiment of the invention, in order to simplify preparation technology, same conductive material can be utilized in substrate 600
Upper and lower both side surface prepares screen layer 500 and pressure sensitive layer 310.For example, two-sided plating ITO thin-film material can be selected
(i.e. Double ito films), carry out electrode pattern in the one side of thin-film material and make processing as pressure sensitive layer 310, another side
Extra process is not required to, with whole face ITO as screen layer 500.Thus, it is possible to further simplify according to embodiments of the present invention
The preparation technology of touch screen.
According to an embodiment of the invention, in the touch screen, pressure sensitive electrode 10 can be polygonal electrodes or engrave
Empty electrode.For example, with reference to figure 9A and Fig. 9 B, pressure sensitive electrode 10 can be rhombus, or the polygon such as square,
Random electrode block (not shown), hollow processing can also be carried out to pressure sensitive electrode 10.It should be noted that Fig. 9 B
Shown in pierced pattern it is exemplary only, it is impossible to be interpreted as limitation of the present invention.That is the vacancy section of hollow out electrode 10
The number in domain can not be 1, and the shape of void region can also be rectangle, circle, triangle in addition to it can be square
Shape etc..Those skilled in the art can also be according to requirement of the touch-control screen surfaces for pressure touch sensitivity, to feeling of stress
Answer the pressure sensitive electrode pattern on the surface of layer 310 to be designed, thus, be easy to regulate and control the initial capacitance of the pressure sensitive electrode
Value, prevent from that capacitance signal spilling occurs during pressing, so as to improve the accuracy of pressure detecting.
It should be noted that such as ground plane 320 is made up of center 700, and because structure design needs, the part of center 700
Region needs borehole, forms borehole area, therefore now needs to carry out the pressure sensitive electric capacity at borehole area using algorithm software
Compensation optimizing processing.Thus, it is possible to avoiding the pressure sensitive capacitance in borehole area is influenceed by borehole and causes the feeling of stress at this
Data exception should be detected.
When carrying out pressure touch operation to the touch screen, because pressure sensitive layer 310 is by pressure vertically downward, therefore
The distance between pressure sensitive layer 310 and ground plane 320 reduce, and electric capacity becomes big.Now, those skilled in the art can be according to connecing
The distance between stratum 320 and pressure sensitive layer 310, the size of the hollow out electrode on pressure sensitive layer 310 is adjusted, prevented
After only touch control operation causes electric capacity to become big, signal occurs and overflows beyond the detection range of detection circuit.Thus, it is possible to pass through letter
The mode of single Top electrode pattern of regulation pressure sensitive layer 310, anti-stop signal overflow.For example, according to an embodiment of the invention, can
With by being designed to the electrode pattern on pressure sensitive layer 310 so that original between pressure sensitive layer 310 and ground plane
The 10%-50% for the maximum capacitor value that capacitance can detect for detection circuit.Also, it is arranged on pressure sensitive layer 310
Hollow out electrode it is more, on the premise of the gross area of pressure sensitive layer 310 is certain, the area of single hollow out electrode is smaller, then single
The original capacitance value formed between individual hollow out electrode and ground plane influenceed by ground plane flatness it is smaller, to the smooth of ground plane
Degree requires lower.Those skilled in the art can be easily according to the parameter request of the touch screen, on pressure sensitive layer 310
Number of electrodes is designed.
According to an embodiment of the invention, the touch screen can further include touch sensitive layer.Touch sensitive layer can be with
With touch-control screen structure commonly used in the art, such as can be external hanging type (including but is not limited to OGS, GF, GFF, GF2 etc.), on-
The touch-control screen structure of the modes such as cell, in-cell.
It should be noted that the embodiment of above-mentioned touch screen is exemplary, it is impossible to limitation of the present invention is interpreted as, this
The technical staff in field above-described embodiment can be changed, be changed within the scope of the invention, replaced and modification.
For example, pressure sensitive layer 310 can also be arranged between display module 200 and cover sheet 100, thus, have
Beneficial to the smooth degree for improving pressure sensitive layer 310, simplify preparation technology, reduce production cost.
For example, pressure sensitive layer 310 can also be arranged on inside display unit.Thus, it is possible to improve the collection of display unit
Into degree, be advantageous to simplify the preparation technology of the touch screen, it is cost-effective.
For example, pressure sensitive layer 310 can also be arranged on inside back light unit, using the conductive structure inside back light unit
As pressure sensitive layer 310, be advantageous to save cost, simplify preparation technology.Or pressure sensitive layer 310 can be also attached to
The lower surface of back light unit, and then be advantageous to improve the degree of integration of back light unit, simplify preparation technology, and when generation is bonded not
It is good when needing to scrap, only it need to replace the back light unit for being integrated with pressure sensitive layer 310.
In another aspect of this invention, the present invention proposes a kind of electronic equipment.According to an embodiment of the invention, reference chart
11, the electronics, which sets 1000, includes previously described touch screen 1100.Electronic equipment 1000 is used as by the use of previously described touch screen
Screen, different touch-control dynamics can be sensed by screen, so as to realize pressure sensitive, and based on to above-mentioned touch-control pressure
The sensing of power is realized and electronic equipment is controlled.Because the electronic equipment includes previously described touch screen, therefore the electricity
Sub- equipment has whole features and advantage possessed by previously described touch screen, will not be repeated here.For synthesis, the electricity
Sub- equipment has the advantages that pressure touch susceptibility is high, preparation technology is simple.
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 (9)
- 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, the display module include display unit and The back light unit being arranged on below the display unit, and the back light unit has glue frame or chase；Center；Pressure sensitive layer, the pressure sensitive layer are arranged between the display unit and the back light unit；AndGround plane, the ground plane electrically connect with the pressure sensitive layer and form pressure sensitive electric capacity, and the ground plane is institute State the ground shield in center, the chase or the display module.
- 2. touch screen according to claim 1, it is characterised in that have between the pressure sensitive layer and the ground plane Compressible space.
- 3. touch screen according to claim 1 or 2, it is characterised in that the ground plane is the center, the center tool There is borehole area, optimization processing is compensated to the pressure sensitive electric capacity at the borehole area using algorithm software.
- 4. touch screen according to claim 1 or 2, it is characterised in that further comprise：Screen layer, the screen layer are located at the upper surface of the pressure sensitive layer.
- 5. touch screen according to claim 4, it is characterised in that the conductive material of the screen layer and the pressure sensitive The conductive material of layer is identical.
- 6. touch screen according to claim 4, it is characterised in that further comprise：Substrate, the screen layer and the pressure sensitive layer are respectively formed in the upper and lower surface of the substrate.
- 7. touch screen according to claim 6, it is characterised in that the thickness of the substrate is 10-150 μm.
- 8. touch screen according to claim 6, it is characterised in that the screen layer, the substrate and the feeling of stress Answering layer is formed by transparent material.
- 9. a kind of electronic equipment, it is characterised in that including the touch screen any one of claim 1-8.
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| CN201610511735.XA CN107562243A (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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| CN201610511735.XA CN107562243A (en) | 2016-07-01 | 2016-07-01 | Touch screen and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762573A (en) * | 2018-06-04 | 2018-11-06 | 维沃移动通信有限公司 | A kind of touch screen, touch-control pressure detection method and terminal |
| CN112596627A (en) * | 2020-12-11 | 2021-04-02 | 武汉华星光电半导体显示技术有限公司 | Handheld button-free touch display device and touch method thereof |
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| CN204926052U (en) * | 2015-09-06 | 2015-12-30 | 南昌欧菲光科技有限公司 | Touch display apparatus |
| CN205015863U (en) * | 2015-09-30 | 2016-02-03 | 南昌欧菲光科技有限公司 | Touch display device |
| CN206039469U (en) * | 2016-07-01 | 2017-03-22 | 南昌欧菲生物识别技术有限公司 | Touch screen and electronic equipment |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204926052U (en) * | 2015-09-06 | 2015-12-30 | 南昌欧菲光科技有限公司 | Touch display apparatus |
| CN205015863U (en) * | 2015-09-30 | 2016-02-03 | 南昌欧菲光科技有限公司 | Touch display device |
| CN206039469U (en) * | 2016-07-01 | 2017-03-22 | 南昌欧菲生物识别技术有限公司 | Touch screen and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762573A (en) * | 2018-06-04 | 2018-11-06 | 维沃移动通信有限公司 | A kind of touch screen, touch-control pressure detection method and terminal |
| CN112596627A (en) * | 2020-12-11 | 2021-04-02 | 武汉华星光电半导体显示技术有限公司 | Handheld button-free touch display device and touch method thereof |
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Effective date of registration: 20210222 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 no.1189 Jingdong Avenue, high tech Zone, Nanchang City, Jiangxi Province Applicant before: Jiangxi OMS Microelectronics Co.,Ltd. Applicant before: Nanchang OFilm Tech. Co.,Ltd. Applicant before: Ophiguang Group Co.,Ltd. Applicant before: SUZHOU OFILM TECH Co.,Ltd. |
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