CN105573567A - Capacitive touch panel - Google Patents
Capacitive touch panel Download PDFInfo
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- CN105573567A CN105573567A CN201410555160.2A CN201410555160A CN105573567A CN 105573567 A CN105573567 A CN 105573567A CN 201410555160 A CN201410555160 A CN 201410555160A CN 105573567 A CN105573567 A CN 105573567A
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Abstract
The invention discloses a capacitive touch panel. The framework comprises two axial electric conduction groups, wherein each electric conduction group consists of a plurality of electric conduction units connected by a conductor; the electric conduction groups of different axial directions are isolated by insulation materials; the adjacent electric conduction units of different axial directions generate an electric field and induction capacitance when a control signal is provided; and a touch position is detected. The capacitive touch panel provided by the invention furthermore comprises a plurality of suspension induction units, wherein each suspension induction unit is distributed between the adjacent electric conduction units. The suspension induction units can generate new induction capacitance without being connected by the conductor or providedwith signals, and the capacitive touch panel has the advantages that induction fields are evenly distributed and a touch induction area is enlarged.
Description
Technical field
The present invention relates to a kind of touch pad, particularly relate to a kind of capacitive type touch pad.Contact panel (TouchPanel) applies in the products such as household electrical appliances, communication, electronic information in a large number.As extensively commercial at present personal digital assistant (PDA), various home appliance, game input interface etc.By the integration of touch pad and display, be available for users to point or pointer clicks the action of input institute for execution according to the function choosing-item in display frame, and be utilized popular system queries instrument etc., to provide the operating system of convenience-for-people effect.
Background technology
Existing contact panel is lay induction region at a substrate surface, its induction region in order to the signal of the finger or induction pen of responding to human body, to reach the object of touch-control.The material that this induction region uses mostly adopts well-illuminated conductive film (such as tin indium oxide ITO), making user when operating, by pressing this well-illuminated conductive film to picture corresponding on this display, reaching the function of touch-control.
At present the normal contact panel adopted can be divided into resistance-type, capacitor induction type, infrared induction, induction, sound wave induction type etc. according to touch-control principle.The capacitance variations that electrostatical binding wherein between the well-illuminated electrode that arranges for utilization of the principle of work of capacitive sensing touch panel and human body produces, detects the coordinate of its position of touch from produced induced current.Because capacitor induction type contact panel is got life-span, operating temperature and initial strength everyway ready and had better advantage at logical luminosity, hardness, accuracy rate, reaction time, touch-control, therefore adopted in a large number at present.
Touch the position on contact panel in order to user will be detected with finger or induction pen, there is various different capacitive induction touch sensing technology at present.Such as disclose a kind of trellis touch-control sensing system in United States Patent (USP) No. 6970160 patent of invention case, it can be applicable to detect the position of touch in a touch-control sensing face.This trellis touch-control sensing system comprises two capacitive sensing layers, separates, to form capacity effect in the middle of these two capacitive sensing layers with a barrier material.Each capacitive sensing layer comprises the conduction group according to same axial arrangement, and the axis of two capacitive sensing layers is perpendicular to one another.Each conduction group is made up of multiple conductive unit connected with wire, and the conduction group on each capacitive sensing layer is electrically connected to corresponding lead, then is connected to a control circuit.The conduction group that this control circuit provides signal to two group axially different by wire, the staggered scope of these two axially different conductive units is made to produce electric field, if user touches this staggered scope, will change the capacitance of induction, and the variable quantity of foundation induced electricity capacitance calculates the position of touch of user.
Taiwan Patent I347545 patent of invention case discloses a kind of capacitive type touch pad, its framework only needs one deck capacitive sensing layer, the conducting element of two axis is placed in same layer, first axial conductive element directly connects with wire, connect with wire again after second guiding conducting element then covers insulation course, compare with United States Patent (USP) No. 6970160 patent of invention case and lacked one deck capacitive sensing floor, therefore allow contact panel more frivolous, also simplify manufacturing course.
Taiwan Patent I430162 patent of invention case discloses a kind of capacitive type touch pad, the feature of capacitive sensing layer is dug a hole in the center of a wherein axial conduction unit, make it have one or more opening, adjust area coverage and the conductive characteristic of conductive unit according to this, when improving multi-point touch signal can interfere with each other negatively touch effect.This patent also discloses and the center of conductive unit is hollowed out, and adds the mode of shielding sensing unit at the place of hollowing out, and also can improve negative tactile effect.This patent discloses in addition and connects shielding sensing unit with wire, form the mode of shielding induction group, which is connected to control circuit by wire, this control circuit provides signal to conduction group or shielding induction group by wire, have and improve Electric Field Distribution and the effect increasing induction sensitivity, but shortcoming is the complexity increasing number of conductors and control circuit.
In United States Patent (USP) No. 6970160 patent of invention case and Taiwan Patent I347545 patent of invention case, can be used to respond to the function that user touches contact panel although all disclose, the conductive unit in those existing patented technologies has the restriction of induction non-uniform electric and induction region.No matter the shape of the conductive unit of front case is square, sexangle or other shapes, induction region is all only at the edge of conductive unit, when user only touches the centre of conductive unit, conductive unit just cannot be responded to, therefore the area of conductive unit must be less than the contact area of user's finger, otherwise has the region that cannot respond to.
Taiwan Patent I430162 patent of invention case discloses the mode of digging a hole at the center of conductive unit, and to hollow out at the center of conductive unit and to add the mode of shielding induction zone, although improve negative tactile effect, can only respond at the edge of conductive unit.This patent discloses in addition provides signal to the method for shielding induction group, Electric Field Distribution and the effect increasing induction sensitivity is improved although have, shortcoming is the complexity increasing number of conductors and control circuit, cause the signal disturbing between wire can be very serious, to be applied in large-sized contact panel, can be difficult to too much realize due to wire.
Therefore the inductive layer of contact panel needs to improve Electric Field Distribution and does not need to increase the technology of wire, not only increases the induction range of conductive unit, avoid Touch Screen have induction less than region, do not need again to increase extra wire.
Summary of the invention
Fundamental purpose of the present invention is to provide one and allows the equally distributed capacitive type touch pad of induction field.When being applied to double-deck induction framework, this framework comprises two capacitive sensing layers, separates, to form capacity effect in the middle of these two capacitive sensing layers with a barrier material.Each capacitive sensing layer comprises the conduction group according to same axial arrangement, and the axis of two capacitive sensing layers is perpendicular to one another.Each conduction group is made up of multiple conductive unit connected with wire.And capacitive type touch pad provided by the invention more comprises multiple suspension sensing unit, each suspension sensing unit is distributed between the second axial conduction unit between the first adjacent axial conduction unit or adjacent.Those suspension sensing units and the first axial conduction unit or the second adjacent axial conduction unit retain suitable spacing, wire is not needed to connect, also do not need to provide signal, new inductance capacitance can be produced, induction field is uniformly distributed and expands touch-control sensing region.
When the present invention is applied to individual layer induction framework, this framework comprises the conduction group of two axis, and each conduction group is made up of multiple conductive unit connected with wire, is then isolated with the coating that insulate between axially different wire.And capacitive type touch pad provided by the invention more comprises multiple suspension sensing unit, each suspension sensing unit is distributed between each the first adjacent axial conduction unit and second axial conduction unit.Those suspension sensing units and the first axial conduction unit and the second adjacent axial conduction unit retain suitable spacing, wire is not needed to connect, also do not need to provide signal, new inductance capacitance can be produced, induction field is uniformly distributed and expands touch-control sensing region.
The principle of induction of priority patent produces electric field at the adjacent area of two axially different conductive units, produce a basic inductance capacitance, when the finger contact of user is to the induction range of this electric field, the capacitance of basic inductance capacitance can be changed, and then calculate the position of touch of user by the variable quantity of capacitance.
And after the present invention adds suspension sensing unit, the conductive unit of two axis can produce electric field with the adjacent area of suspension sensing unit again respectively, and there is an equivalent capacitance value respectively, these two electric capacity are referred to as suspension inductance capacitance, these two suspension inductance capacitances are connected between two axially different conductive units, the inverse of its equivalent capacitance value equals the Reciprocals sums of these two suspension inductance capacitances, this equivalent capacitance profile in the surrounding of suspension sensing unit, because this increasing the scope of induction.
The present invention have modified the shape of conductive unit, and suspension sensing unit is placed in the space between conductive unit, increases the scope of touch-control sensing, makes being more evenly distributed of electric field, and avoid the situation that the central area of conductive unit cannot be responded to.The technology adding suspension sensing unit can be applicable to individual layer induction framework and double-deck induction framework.
Conceive according to this case, capacitive type touch pad provided by the invention forms a touch-control graphic structure on a substrate surface, comprise: multiple first axial conduction group, each first axial conduction group comprises multiple first axial conduction unit, and is axially disposed within the surface of this substrate with first; Multiple second axial conduction group, each second axial conduction group comprises multiple second axial conduction unit, and is axially disposed within the surface of this substrate with second; Multiple first axial lead, connects each first adjacent axial conduction unit in each first axial conduction group respectively; Multiple insulator, to cover in each the second axial conduction group between each second adjacent axial conduction unit respectively; Multiple second axial lead, crosses the surface of corresponding insulator, connects each second adjacent axial conduction unit in each second axial conduction group respectively; And multiple suspension sensing unit, be arranged at respectively between the first axial conduction unit and the second axial conduction unit.
Conceive according to this case, above-mentioned capacitive type touch pad more comprises multiple insulator, to cover in each the first axial conduction group between each first adjacent axial conduction unit respectively, make the first axial lead cross the surface of corresponding insulator, and connect each first adjacent axial conduction unit in each first axial conduction group respectively.
Conceive according to this case, the present invention also can be applicable to another kind of capacitive type touch pad, it comprises: multiple first axial conduction group, and each first axial conduction group comprises multiple the first axial conduction unit connected with the first axial lead, and is axially disposed within the surface of this substrate with first; Multiple second axial conduction group, each second axial conduction group comprises multiple second axial conduction unit, and is axially disposed within the surface of this substrate with second; Multiple second axial lead, is connected to the edge of this substrate surface respectively from each second axial conduction unit; And multiple suspension sensing unit, be arranged at respectively between the first axial conduction unit and the second axial conduction unit.
According to this case conception, above-mentioned capacitive type touch pad more comprises multiple connecting line, connects the second axial lead belonging to identical conduction group, and the second axial conduction unit belonging to same conduction group is connected with each other.
Conceive according to this case, the present invention also can be applicable to double-deck inductance capacitance formula touch pad, it comprises: one first inductive layer, comprises multiple the first axial conduction group complying with the first axial array, and each first axial conduction group is made up of multiple the first axial conduction unit connected with wire; One second inductive layer, comprises multiple the second axial conduction group complying with the second axial array, and each second axial conduction group is made up of multiple the second axial conduction unit connected with wire; One isolation layer, is placed in the middle of the first inductive layer and the second inductive layer, to form capacity effect with a barrier material; And multiple suspension sensing unit, between the first axial conduction group that each suspension sensing unit is arranged at the first inductive layer or between the second axial conduction group of the second inductive layer.
Above-mentioned capacitive type touch pad, wherein the shape of this first axial conduction unit, the second axial conduction unit and suspension sensing unit is square, sexangle, strip or cruciform, or is the combination of aforementioned shapes.
Above-mentioned capacitive type touch pad more comprises multiple signal transmssion line, is formed at this substrate surface, and each signal transmssion line connects each first axial conduction group and each the second axial conduction group separately
Above-mentioned capacitive type touch pad, wherein the distribution arrangement of this first axial conduction group and the second axial conduction group is orthogonal.
Above-mentioned capacitive type touch pad, wherein this each the first axial conduction unit, the second axial conduction unit, the first axial lead and the second axial lead are with made by transparent conductive material, this transparent conductive material can be tin indium oxide (IndiumTinOxide, ITO).
Accompanying drawing explanation
Fig. 1 is the structure of an existing double-layer capacitance type touch pad;
Fig. 2 is the structure of an existing individual layer capacitive type touch pad;
Fig. 3 is the structure of an existing capacitive type touch pad, and it comprises shielding sensing unit;
Fig. 4 is the structure of the individual layer capacitive type touch pad of one embodiment of the invention;
Fig. 5 is the sensing unit of two axis of one embodiment of the invention and the partial enlarged drawing of suspension sensing unit;
Fig. 6 is the structure of the individual layer capacitive type touch pad of another embodiment of the present invention;
Fig. 7 is the structure of the double-layer capacitance type touch pad of one embodiment of the invention.
Description of reference numerals: 10-first inductive layer; 101-first axial induction group; 102-first axial induction unit; 103-first axial lead; 20-second inductive layer; 201-second axial induction group; 202-second axial induction unit; 203-second axial lead; 204-insulation course; 30-suspension sensing unit; 31-shields sensing unit; The basic inductance capacitance of 40-; 41-suspension inductance capacitance.
Embodiment
The present invention more clearly describes with reference to following embodiment.Please note the following description of embodiments of the invention, only terminate in description purposes; This does not mean the description detailed for the present invention or be limited to this exposure form.
The first embodiment of the present invention refers to Fig. 4, and it shows the structure of an individual layer inductance capacitance formula touch pad.This capacitive sensing layer comprises the first axial conduction group of 4 transverse directions, and the second axial conduction group of 5 longitudinal directions, and 80 suspension sensing units.Each first axial conduction group comprises 6 the first axial conduction unit, and the first wherein adjacent axial conduction unit is directly connected by wire.And each second axial conduction group comprises 5 the second axial conduction unit, connect at surface of insulating layer wire after the second wherein adjacent axial conduction unit covers insulating material.Each suspension sensing unit is placed in the gap of the first axial conduction unit and the second axial conduction unit.
Fig. 5 is the conductive unit of two axis of one embodiment of the invention and the partial enlarged drawing of suspension sensing unit.Wherein the shape of the first axial conduction unit is cross, and the shape of the conductive unit of the second axis is yi word pattern, and the region close at the sensing unit of two axis is adjusted to hypotenuse.Suspension sensing unit is then square, is placed in the gap of the first axial conduction unit and the second axial conduction unit.
Fig. 5 also depicts the inductance capacitance that the conductive unit of two axis and suspension sensing unit produce.When providing control signal to the conduction group of these two axis, the adjacent area of two axial conduction unit can produce basic inductance capacitance, and the adjacent area of suspend sensing unit and two axial conduction unit then can form suspension inductance capacitance.
The second embodiment of the present invention refers to Fig. 6, and it shows the structure of an individual layer inductance capacitance formula touch pad.This capacitive sensing layer comprises the first axial conduction group of 4 transverse directions, and the second axial conduction group of 5 longitudinal directions, and 80 suspension sensing units.Each first axial conduction group comprises 5 the first axial conduction unit be connected, and each second axial conduction group comprises 4 the second axial conduction unit, each suspension sensing unit is placed in the gap of the first axial conduction unit and the second axial conduction unit.
Conductive unit connected mode in this embodiment is different with the first embodiment, square frame-shaped first axial conduction unit in the first axial conduction group in this embodiment is directly connect, cruciform second axial conduction unit in second axial conduction group then receives the edge of inductive layer respectively with wire, then cover insulation course do cross-line connect.The benefit of this connection is that the central area of inductive layer does not need to cover insulating material, simplify Making programme, and when being applied in the electronic products such as Touch Screen, this inductive layer has reasonable transmittance, and outside user's screen, connecting wiring, its insulating material can select the general material of alternatively non-transparent.
The third embodiment of the present invention refers to Fig. 7, the structure of its display pair of lamina inductance capacitance formula touch pad.First inductive layer comprises the first axial conduction group of 2 transverse directions, and each first axial conduction group comprises 5 the first axial conduction unit, forms elongate in shape after connecting with wire; Second inductive layer comprises 5 the second axial conduction groups according to the second axial array, and each second axial conduction group comprises 3 the second axial conduction unit connected with wire, and the shape of the second axial conduction unit is cross; Isolation layer is placed in the middle of the first inductive layer and the second inductive layer, to form capacity effect with a barrier material; And the second inductive layer more comprises 60 suspension sensing units, each suspension sensing unit is arranged between the second axial conduction group of the second inductive layer.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is as the criterion when the claim of this case defines.
Claims (20)
1. a capacitive type touch pad, it forms a touch-control graphic structure on a substrate surface, it is characterized in that, comprises:
Multiple first axial conduction group, each first axial conduction group comprises multiple first axial conduction unit, and is axially disposed within the surface of this substrate with first;
Multiple second axial conduction group, each second axial conduction group comprises multiple second axial conduction unit, and is axially disposed within the surface of this substrate with second;
Multiple first axial lead, connects each first adjacent axial conduction unit in each first axial conduction group respectively;
Multiple insulator, to cover in each the second axial conduction group between each second adjacent axial conduction unit respectively;
Multiple second axial lead, crosses corresponding insulator surface, connects each second adjacent axial conduction unit in each second axial conduction group respectively; And
Multiple suspension sensing unit, is arranged between the first axial conduction unit and the second axial conduction unit respectively.
2. capacitive type touch pad as claimed in claim 1, wherein more comprise multiple insulator, to cover in each the first axial conduction group between each first adjacent axial conduction unit respectively, make the first axial lead cross corresponding insulator surface, and connect each first adjacent axial conduction unit in each first axial conduction group respectively.
3. capacitive type touch pad as claimed in claim 1 or 2, wherein the shape of this first axial conduction unit, the second axial conduction unit and suspension sensing unit is square, sexangle, strip or cruciform, or is the combination of aforementioned shapes.
4. capacitive type touch pad as claimed in claim 1 or 2, wherein more comprises multiple signal transmssion line, be formed at this substrate surface, and each signal transmssion line connects each first axial conduction group and each the second axial conduction group separately.
5. capacitive type touch pad as claimed in claim 1 or 2, wherein the distribution arrangement of this first axial conduction group and the second axial conduction group is orthogonal.
6. capacitive type touch pad as claimed in claim 1 or 2, wherein this each the first axial conduction unit, the second axial conduction unit, the first axial lead and the second axial lead are made with transparent conductive material.
7. capacitive type touch pad as claimed in claim 1 or 2, wherein this transparent conductive material is tin indium oxide.
8. a capacitive type touch pad, it forms a touch-control graphic structure on a substrate surface, it is characterized in that, comprises:
Multiple first axial conduction group, each first axial conduction group comprises multiple the first axial conduction unit connected with the first axial lead, and is axially disposed within the surface of this substrate with first;
Multiple second axial conduction group, each second axial conduction group comprises multiple second axial conduction unit, and is axially disposed within the surface of this substrate with second;
Multiple second axial lead, is connected to the edge of this substrate surface respectively from each second axial conduction unit; And
Multiple suspension sensing unit, is arranged between the first axial conduction unit and the second axial conduction unit respectively.
9. capacitive type touch pad as claimed in claim 8, wherein more comprises multiple connecting line, connects the second axial lead belonging to identical conduction group, and the second axial conduction unit belonging to same conduction group is connected with each other.
10. capacitive type touch pad as claimed in claim 8 or 9, wherein the shape of this first axial conduction unit, the second axial conduction unit and suspension sensing unit is square, sexangle, strip or cruciform, or is the combination of aforementioned shapes.
11. capacitive type touch pads as claimed in claim 8 or 9, wherein more comprise multiple signal transmssion line, are formed at this substrate surface, and each signal transmssion line connects each first axial conduction group and each the second axial conduction group separately.
12. capacitive type touch pads as claimed in claim 8 or 9, wherein the distribution arrangement of this first axial conduction group and the second axial conduction group is orthogonal.
13. capacitive type touch pads as claimed in claim 8 or 9, wherein this each the first axial conduction unit, the second axial conduction unit, the first axial lead and the second axial lead are made with transparent conductive material.
14. capacitive type touch pads as claimed in claim 8 or 9, wherein this transparent conductive material is tin indium oxide.
15. 1 kinds of capacitive type touch pads, it forms pair of lamina touch-control graphic structure on a substrate surface, it is characterized in that, comprises:
One first inductive layer, comprises multiple the first axial conduction group complying with the first axial array, and each first axial conduction group is made up of multiple the first axial conduction unit connected with wire;
One second inductive layer, comprises multiple the second axial conduction group complying with the second axial array, and each second axial conduction group is made up of multiple the second axial conduction unit connected with wire;
One isolation layer, is placed in the middle of the first inductive layer and the second inductive layer with a barrier material; And
Multiple suspension sensing unit, between the first axial conduction group that each suspension sensing unit is arranged at the first inductive layer or between the second axial conduction group of the second inductive layer.
16. capacitive type touch pads as claimed in claim 15, wherein the shape of this first axial conduction unit, the second axial conduction unit and suspension sensing unit is square, sexangle, strip or cruciform, or is the combination of aforementioned shapes.
17. capacitive type touch pads as claimed in claim 15, wherein more comprise multiple signal transmssion line, are formed at this substrate surface, and each signal transmssion line connects each first axial conduction group and each the second axial conduction group separately.
18. capacitive type touch pads as claimed in claim 15, wherein the distribution arrangement of this first axial conduction group and the second axial conduction group is orthogonal.
19. capacitive type touch pads as claimed in claim 15, wherein this each the first axial conduction unit, the second axial conduction unit, the first axial lead and the second axial lead are made with transparent conductive material.
20. capacitive type touch pads as claimed in claim 15, wherein this transparent conductive material is tin indium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410555160.2A CN105573567A (en) | 2014-10-17 | 2014-10-17 | Capacitive touch panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410555160.2A CN105573567A (en) | 2014-10-17 | 2014-10-17 | Capacitive touch panel |
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| CN105573567A true CN105573567A (en) | 2016-05-11 |
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| CN201410555160.2A Pending CN105573567A (en) | 2014-10-17 | 2014-10-17 | Capacitive touch panel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202422085U (en) * | 2011-09-21 | 2012-09-05 | 敦泰科技有限公司 | Mutual-capacitance touch screen for dispersing and coupling electrodes |
| CN102662551A (en) * | 2012-04-17 | 2012-09-12 | 苏州合美硕触控技术有限公司 | Capacitive touch screen |
| US20130181942A1 (en) * | 2012-01-12 | 2013-07-18 | Synaptics Incorporated | Single layer capacitive imaging sensors |
| CN103577005A (en) * | 2012-08-01 | 2014-02-12 | 奕力科技股份有限公司 | Capacitive touch panel and module thereof |
-
2014
- 2014-10-17 CN CN201410555160.2A patent/CN105573567A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202422085U (en) * | 2011-09-21 | 2012-09-05 | 敦泰科技有限公司 | Mutual-capacitance touch screen for dispersing and coupling electrodes |
| US20130181942A1 (en) * | 2012-01-12 | 2013-07-18 | Synaptics Incorporated | Single layer capacitive imaging sensors |
| CN102662551A (en) * | 2012-04-17 | 2012-09-12 | 苏州合美硕触控技术有限公司 | Capacitive touch screen |
| CN103577005A (en) * | 2012-08-01 | 2014-02-12 | 奕力科技股份有限公司 | Capacitive touch panel and module thereof |
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