CN102890573B - A kind of ITO touch inductor - Google Patents
A kind of ITO touch inductor Download PDFInfo
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- CN102890573B CN102890573B CN201110203363.1A CN201110203363A CN102890573B CN 102890573 B CN102890573 B CN 102890573B CN 201110203363 A CN201110203363 A CN 201110203363A CN 102890573 B CN102890573 B CN 102890573B
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- ito
- touch
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- 230000001939 inductive effect Effects 0.000 claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 238000011068 load Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 10
- 230000000875 corresponding Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000001788 irregular Effects 0.000 claims description 2
- 238000009429 electrical wiring Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000007781 pre-processing Methods 0.000 description 4
- -1 Indium Tin Oxide indium tin metal oxide Chemical class 0.000 description 3
- BDAGIHXWWSANSR-UHFFFAOYSA-N Formic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000005336 safety glass Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
Abstract
The present invention relates to a kind of ITO touch inductor, described ITO touch inductor includes insulated substrate, ITO inductive layer, dielectric isolation layer and touch conducting shell, wherein, described ITO inductive layer is arranged on insulated substrate, and is isolated with touching conducting shell by dielectric isolation layer；When there being the signal of telecommunication to be loaded onto touch conducting shell, described touch conducting shell and ITO inductive layer can produce contact point at signal of telecommunication loading, and the ITO inductive layer at described contact point receives and transmit this signal of telecommunication.Pass through technical scheme, achieve the monolayer touch inductor without wire jumper ITO structure, and at least two contact can be identified and position by this touch inductor, and technical scheme simplifies the processing technology of touch inductor, reduces the cost of manufacture of touch inductor simultaneously.
Description
Technical field
The present invention relates to touch sensible field, be specifically related to a kind of ITO touch inductor.
Background technology
Owing to being currently used for the ITO(Indium Tin Oxide indium tin metal oxide of multiconductor sensing detection technique) touch
Touch induction apparatus, how to realize with capacitive bilayer or monolayer wire jumper ITO structure.Fig. 1 is to sense detection technique for multiconductor
Capacitance type ITO structural representation, for reaching the ITO structure shown in Fig. 1, wherein condenser type bilayer ITO structure is by coordinate axes X
It is divided into two-layer, centre to be separated (as shown in Figure 2) by sealing coat with the ITO of Y-direction；And condenser type monolayer ITO jumper wire construction be by
The ITO of coordinate axes X and Y-direction is laid in one layer, middle by wire jumper connection (as shown in Figure 3).
Wherein the cost of manufacture of condenser type bilayer ITO structure alignment precision higher, between layers is poor, therefore causes
Contact accuracy of identification reduces, and light transmittance is extremely low the power consumption indirectly causing backlight is increased；And condenser type monolayer wire jumper ITO
Structure needs the thinnest wire jumper to be attached, and therefore causes that the difficult wiring of ITO induction apparatus, manufacture difficulty are big, yield rate is low
Etc. drawback.
Summary of the invention
The technical problem to be solved is to provide a kind of ITO touch inductor, not only simplify touch inductor
Processing technology, reduce the cost of manufacture of touch inductor, it is achieved that monolayer, and can be to extremely without the ITO structure of wire jumper
Few two contacts are identified and position.
The present invention is to solve above-mentioned technical problem, disclose a kind of ITO touch inductor, described ITO touch inductor
Including insulated substrate, ITO inductive layer, dielectric isolation layer and touch conducting shell, wherein, described ITO inductive layer is arranged on insulation base
On plate, and isolated with touching conducting shell by dielectric isolation layer；When there being the signal of telecommunication to be loaded onto touch conducting shell, described
Touching conducting shell and ITO inductive layer can produce contact point at signal of telecommunication loading, the ITO inductive layer at described contact point receives also
Transmit this signal of telecommunication.
Further, described ITO inductive layer is made up of ITO material multiple ITO elementary cells and multiple ITO subelement group
Becoming, the plurality of ITO elementary cell is connected by ITO subelement each other.
Further, described ITO elementary cell be shaped as polygon.
Further, described polygon is regular polygon.
Further, described polygon is irregular polygon.
Further, described polygon is triangle, tetragon, hexagon, octagon, circular or oval.
Further, the shape of multiple ITO elementary cells of described composition ITO inductive layer is identical.
Further, the shape of multiple ITO elementary cells of described composition ITO inductive layer is at least two kinds.
The invention described above technical scheme is used to provide the benefit that: by using monolayer without the touch sense of wire jumper ITO structure
Answer device, it is possible at least two contact is identified and is positioned, and technical scheme simplifies touch inductor simultaneously
Processing technology, and reduce the error to touch sensible point location, improve the precision of touch sensible, enhance touch sensible
The light transmittance of device, indirectly reduces the power consumption of backlight, thus also reduces the power consumption of touch inductor, and reduce on the whole
The cost of manufacture of touch inductor.
Accompanying drawing explanation
Fig. 1 is the capacitance type ITO structural representation for multiconductor sensing detection technique；
Fig. 2 is the generalized section of condenser type bilayer ITO structure；
Fig. 3 is the generalized section of condenser type monolayer wire jumper ITO structure；
Fig. 4 is the cross-sectional view of ITO touch inductor in the embodiment of the present invention；
Fig. 5 A is the generalized section of ITO inductive layer in the embodiment of the present invention；
Fig. 5 B is the equivalent RC circuit structure chart of Fig. 5 A in the embodiment of the present invention；
Fig. 6 A is the ITO inductive layer structural representation being made up of multiple triangle ITO elementary cells in the embodiment of the present invention；
Fig. 6 B is the equivalent RC circuit structure chart of Fig. 6 A in the embodiment of the present invention；
Fig. 7 A is the ITO inductive layer structural representation being made up of multiple tetragon ITO elementary cells in the embodiment of the present invention；
Fig. 7 B is the equivalent RC circuit structure chart of Fig. 7 A in the embodiment of the present invention；
Fig. 8 A is the ITO inductive layer structural representation being made up of multiple hexagon ITO elementary cells in the embodiment of the present invention；
Fig. 8 B is the equivalent RC circuit structure chart of Fig. 8 A in the embodiment of the present invention；
Fig. 9 is the equivalent RC circuit figure of ITO inductive layer in the embodiment of the present invention；
Lag characteristic when Figure 10 is to touch with or without finger on ITO touch inductor in the embodiment of the present invention；
Figure 11 is the fundamental diagram of ITO touch inductor in the embodiment of the present invention.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
Non-for limiting the scope of the present invention.
One embodiment of the invention discloses a kind of ITO touch inductor, and Fig. 4 is ITO touch sensible in the embodiment of the present invention
The cross-sectional view of device, as shown in Figure 4: described ITO touch inductor includes insulated substrate 401, ITO inductive layer 402, absolutely
Edge sealing coat 403 and touch conducting shell 404, wherein, described ITO inductive layer 402 is arranged on insulated substrate 401, and by absolutely
Edge sealing coat 403 is isolated with touching conducting shell 404.In this embodiment, described insulated substrate 401 generally uses transparent
Hard material, such as glass or organic film etc.；Described touch conducting shell 404 uses safety glass or PET (poly-to benzene two mostly
Formic acid glycol ester) etc., wherein the advantage of PET is to accomplish thinner by touching conducting shell, and price is the most cheap.
In embodiments of the present invention, described ITO inductive layer is made up of ITO material multiple ITO elementary cells and multiple ITO
Subelement forms, wherein ITO(Indium Tin Oxide indium tin metal oxide) it is a kind of N-type oxide semiconductor oxygen
Change indium stannum, due to the resistance characteristic of ITO itself and ITO capacitance characteristic over the ground (in this embodiment, the resistance spy of described ITO
Property refer to the resistivity that ITO material itself is had, described ITO capacitance characteristic over the ground refer to by ITO and ground whole as one
Body forms equivalent capacity, and wherein ITO is a pole plate of equivalent capacity, and ground is another pole plate of equivalent capacity), the most multiple
ITO elementary cell and ITO subelement mutually arranged and define equivalence RC circuit structure, thus avoid metal connecting line and beat
The complicated technology in hole.In this embodiment, described ITO inductive layer is by multiple ITO elementary cells and multiple ITO subelement group
Becoming, the most each ITO elementary cell is equivalent to an equivalent capacity over the ground；And multiple ITO elementary cell each other further through
ITO subelement connects, and described each ITO subelement as line is equivalent to an equivalent resistance.
The basic equivalent relation of ITO inductive layer equivalent RC circuit structure, Fig. 5 A are described below in conjunction with accompanying drawing 5A and accompanying drawing 5B
For the generalized section of monolayer ITO inductive layer in the embodiment of the present invention, as shown in Figure 5A: form with tetragon ITO elementary cell
Monolayer ITO inductive layer structure as a example by, described monolayer ITO inductive layer 501 is fixed on insulated substrate 502, real in the present invention
Execute in example, described monolayer ITO inductive layer 501 by 4 tetragon ITO elementary cells A1, A2, A3, A4 and 4 ITO subelement a1,
A2, a3, a4 form, and are connected by ITO subelement between described 4 tetragon ITO elementary cells, according to ITO material itself
Resistance characteristic and ITO capacitance characteristic over the ground, Fig. 5 B is the equivalent RC circuit structure chart of Fig. 5 A in the embodiment of the present invention, such as Fig. 5 B
Shown in: described 4 tetragon ITO elementary cells A1, A2, A3, A4 are equivalent to equivalent capacity C1, C2, C3, C4 over the ground；Again because
The resistance characteristic of ITO material itself, ITO subelement a1, a2, a3, a4 of described connection tetragon ITO elementary cell are equivalent to
Effect resistance R1, R2, R3, R4；In this embodiment, the parameter of described equivalent capacity C and equivalent resistance R and ITO in accompanying drawing 5A
The ITO elementary cell of inductive layer 501 and the material structure of the size of ITO subelement and insulated substrate 502 have certain relation,
The relation of described correspondence is as follows:
Equivalent resistance: the size of the parameter of described equivalent resistance R and ITO elementary cell (the wide W of ITO elementary cell, long L,
Thickness d) and the size (the wide w of ITO subelement, long l) of ITO subelement relevant, its relational expression is: R=f (W) * f (L) * f (d) *
f(w)*f(l);
Equivalent capacity: the size of the parameter of described equivalent capacity C and ITO elementary cell (the wide W of ITO elementary cell, long L,
Thickness d) and the thickness H of insulated substrate, permittivity of vacuum, the dielectric constant of dielectric substrate materialRelevant, its relational expression
For: C= *f(W)*f(L)*f(d)*f(H);
In concrete application process, can by changing the parameter such as the shape of monolayer ITO inductive layer structure, size, thickness,
Or by changing the parameters such as the shape of insulated substrate structure, size, thickness, regulate electricity in the equivalent RC circuit structure of correspondence
Resistance and the parameter value of electric capacity.
In the embodiment of the present invention, it is also possible to according to needs time actually used, ITO elementary cell is designed to multiple shape
Shape, Fig. 6 A is the ITO inductive layer structural representation being made up of multiple triangle ITO elementary cells in the embodiment of the present invention, such as figure
Shown in 6A: described ITO inductive layer is made up of multiple triangle ITO elementary cells, the ITO elementary cell pair of the most each triangle
Ground is equivalent to equivalent capacity C；And be connected by ITO subelement between multiple triangle ITO elementary cell, described as line
ITO subelement can be the various ways such as straight line, oblique line, broken line；Fig. 6 A is made up of multiple triangle ITO elementary cells
ITO inductive layer can be equivalent to the RC network structure being made up of multiple hexagonal RC elementary cells, as shown in Figure 6B, for this
The equivalent RC circuit structure chart of Fig. 6 A in bright embodiment.In this embodiment, described variously-shaped ITO elementary cell and
The principle of the equivalent RC circuit of the ITO inductive layer of ITO subelement composition is similar, repeats the most one by one；If Fig. 7 A is this
The ITO inductive layer structural representation being made up of multiple tetragon ITO elementary cells in bright embodiment, in like manner understands, and Fig. 7 B is this
The equivalent RC circuit structure chart of Fig. 7 A in inventive embodiments；As Fig. 8 A be in the embodiment of the present invention basic by multiple hexagon ITO
The ITO inductive layer structural representation of unit composition, in like manner understands, and Fig. 8 B is the equivalent RC circuit knot of Fig. 8 A in the embodiment of the present invention
Composition.
Operation principle below in conjunction with accompanying drawing 9～the ITO touch inductor of 11 couples of present invention is described in detail: when there being electricity
When signal loading is to the touch conducting shell of ITO touch inductor, described touch conducting shell and ITO inductive layer load at the signal of telecommunication
Place can produce contact point, and the described signal of telecommunication is received by the ITO inductive layer at contact point and transmission.
In embodiments of the present invention, according to resistance characteristic and the ITO capacitance characteristic over the ground of ITO material, and felt by ITO
Answering the principle of equal effects of layer and RC circuit structure, the work that utilization " lag characteristic of RC circuit " describes ITO touch inductor is former
Reason, wherein, the lag characteristic of described ITO inductive layer equivalent RC circuit as shown in Figure 9: in the RC circuit of Fig. 9, at input
VIN adds pulse signal, and owing to electric capacity carrying out discharge and recharge, exit VOUT can produce retardation Tc to input VIN, such as figure
Shown in 10, wherein retardation Tc is the function of R and C: Tc=f (R, C).
Figure 11 is the fundamental diagram of ITO touch inductor in the embodiment of the present invention, as shown in figure 11, with tetragon ITO
As a example by the ITO touch inductor of the ITO inductive layer of elementary cell composition: due to monolayer ITO inductive layer structure, it is right to be equivalent to
The RC circuit structure answered；Its operation principle is, by the exit of surrounding on ITO inductive layer in a certain order and mode
Add pumping signal, utilize the lag characteristic of its equivalent RC circuit, corresponding row can be produced and postpone and row delay.Such as Figure 10 institute
Showing: in a specific embodiment, it is assumed that the high level voltage of pulse is VH, the threshold value of detection voltage is VTH, then VTH=a*
VH, wherein a is constant (0 < a≤1)；Time point when the voltage of input pulse VIN is more than VTH is set to T0, corresponding exit
The voltage of VOUT is set to T1 more than time point during VTH, therefore Tc=T1-T0 time delay.Deposit owing to human body is equivalent to one again
Contain the device of electronics, be similarly equivalent to an electric capacity, when the finger of user touches the touch biography of ITO touch inductor
During conducting shell, causing touching conducting shell and produce contact point with ITO inductive layer in touch place, touch conducting shell will by contact point simultaneously
The electric capacity of human body is added on ITO inductive layer, causes " normally " capacitance field of ITO inductive layer to change, owing to finger touches
Time the contact point that produces change on ITO inductive layer the capacitance of ITO elementary cell at contact point, when therefore touching with or without finger
Row, column retardation different, as shown in Figure 10: the time delay Tcf=T1f-T0f corresponding when there being finger to touch；And having
Retardation Tcf that finger is corresponding when touching also is the function of R and C: Tcf=f (R, C), enters with retardation Tc when touching without finger
Row compares, and obtains amount of delay △ T, △ T=Tcf-Tc.In embodiments of the present invention, described exit is for pumping signal
Postpone and row postpone signal at the row having finger to touch and to produce when touching without finger, through preprocessing system 802(by △ TDC with
Depositor forms), calculate the time difference that when finger touches and touches without finger, row postpones and row postpone, be converted into numeral
Signal.I.e. through △ TDC(Delta-Time-to Digital Converter time data transducer) carry out turning of digital signal
Change, the digital signal after conversion is stored in a register, then after-treatment system in after-treatment system 803(the present embodiment
For processor), by specific algorithm, complete the positioning function to contact.
The present embodiment combines the sound when operation principle of above-mentioned ITO touch inductor describes single-point, and multiple point touching at 2
Answer process: in embodiments of the present invention, when single finger touches on ITO touch inductor, due to the inductance capacitance of finger
Change on ITO inductive layer the capacitance of ITO elementary cell at contact point, therefore to going delay output letter by contact point
Number and row delay output signal change therewith, ranks postpone signal through preprocessing system, the storage of after-treatment system and meter
Calculate, obtain the coordinate position of X and Y of this contact point, it is achieved thereby that to single-contact location；Touch when there being two fingers simultaneously
Time on ITO touch inductor, the ITO changed on ITO inductive layer at two contact points due to the inductance capacitance of finger is basic
The capacitance of unit, therefore to should the row delay output signal of two contact points and row delay output signal change therewith, OK
The signal that row postpone, through preprocessing system, the storage of after-treatment system and calculating, respectively obtains X and Y of the two contact point
Coordinate position, it is achieved thereby that the location to two contacts touched simultaneously；Touch when having multiple finger to touch ITO simultaneously
Time on induction apparatus, change the electric capacity of the ITO elementary cell of multiple contact points on ITO inductive layer due to the inductance capacitance of finger
Being worth, row delay output signal and the row delay output signal of the most corresponding the plurality of contact point change therewith, the letter that ranks postpone
Number through preprocessing system, the storage of after-treatment system and calculating, respectively obtain the coordinate position of X and Y of these touch points, from
And achieve the location to the multiple contacts touched simultaneously.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (1)
1. an ITO touch inductor, it is characterised in that described ITO touch inductor includes insulated substrate, ITO inductive layer, absolutely
Edge sealing coat and touch conducting shell, wherein, described ITO inductive layer is arranged on insulated substrate, and by dielectric isolation layer with tactile
Touch conducting shell to isolate；When there being the signal of telecommunication to be loaded onto touch conducting shell, described touch conducting shell and ITO inductive layer are at electricity
Can produce contact point at signal loading, the ITO inductive layer at described contact point receives and transmits this signal of telecommunication；
Multiple ITO elementary cells and multiple ITO subelement that described ITO inductive layer is made up of ITO material form, the plurality of
ITO elementary cell is connected by ITO subelement each other, wherein, and the plurality of ITO elementary cell and the plurality of ITO
Subelement is arranged within the same layer, and the described ITO elementary cell that any two is adjacent passes through a corresponding described ITO subelement
And being connected with each other, and multiple ITO bases that each described ITO elementary cell is adjacent by the ITO subelement of multiple correspondences
This unit is connected with each other, and each described ITO subelement is as the electrical wiring between two adjacent described ITO elementary cells, many
Individual ITO elementary cell and ITO subelement mutually arranged and define equivalence RC circuit structure；
Described ITO elementary cell be shaped as polygon；Described polygon be regular polygon, irregular polygon, triangle, four
Limit shape, hexagon, octagon, circular or oval；
The shape of multiple ITO elementary cells of described composition ITO inductive layer is identical or shape is at least two kinds；
ITO inductive layer adds pumping signal with mode in a certain order, utilizes the lag characteristic of its equivalent RC circuit,
Can produce corresponding row to postpone and row delay, the row that pumping signal produces when there being finger touch and touch without finger postpones and arranges
Postponing signal, carry out the conversion of digital signal through Δ TDC, the digital signal after changing stores in a register, then at process
Reason device, by specific algorithm, completes the positioning function to contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203363.1A CN102890573B (en) | 2011-07-20 | A kind of ITO touch inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203363.1A CN102890573B (en) | 2011-07-20 | A kind of ITO touch inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102890573A CN102890573A (en) | 2013-01-23 |
| CN102890573B true CN102890573B (en) | 2016-12-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201078769Y (en) * | 2007-04-27 | 2008-06-25 | 宸鸿光电科技股份有限公司 | Touch control drawing structure of capacitance type touch control plate |
| CN101546241A (en) * | 2008-03-28 | 2009-09-30 | 义隆电子股份有限公司 | Touch control panel device |
| CN102033672A (en) * | 2010-10-13 | 2011-04-27 | 深圳欧菲光科技股份有限公司 | Capacitive touch screen with single-layer electrode |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201078769Y (en) * | 2007-04-27 | 2008-06-25 | 宸鸿光电科技股份有限公司 | Touch control drawing structure of capacitance type touch control plate |
| CN101546241A (en) * | 2008-03-28 | 2009-09-30 | 义隆电子股份有限公司 | Touch control panel device |
| CN102033672A (en) * | 2010-10-13 | 2011-04-27 | 深圳欧菲光科技股份有限公司 | Capacitive touch screen with single-layer electrode |
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Granted publication date: 20161214 Termination date: 20170720 |