CN102955634A - Touch panel and driving method thereof - Google Patents
Touch panel and driving method thereof Download PDFInfo
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- CN102955634A CN102955634A CN201210386228XA CN201210386228A CN102955634A CN 102955634 A CN102955634 A CN 102955634A CN 201210386228X A CN201210386228X A CN 201210386228XA CN 201210386228 A CN201210386228 A CN 201210386228A CN 102955634 A CN102955634 A CN 102955634A
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Abstract
The invention provides a touch panel. The touch panel comprises a plurality of sensing serial ports which are parallel to each other and placed into the same coating. The driving method is suitable for being used for driving the touch panel. The driving method comprises the following steps: inputting driving signals by each sensing serial port; reading the sensing signals output by the sensing serial port adjacent to the current sensing serial port; and then determining position of a touch point according to the sensing signals.
Description
Technical field
The invention relates to a kind of electronic installation, and particularly relevant for a kind of contact panel.
Background technology
In order to allow electronic product more meet the demand of hommization, many electronic products, such as ATM (Automatic Teller Machine) (Auto-Teller Machine, ATM), mobile phone (mobile phone), flat computer (tablet PC) etc., have contact panel so that the user can be operated more easily in many.Generally speaking, contact panel roughly can be divided into the contact panels such as resistance-type, condenser type, infrared-type and ultrasonic formula, wherein take electric resistance touch-control panel and capacitance type touch-control panel as modal product.
Take capacitance type touch-control panel as example, it is to see through the serial of X sensing and the serial of Y sensing that are perpendicular to one another to come sensing and judge the position that the user touches.In known technology, the serial of X sensing is to belong to different retes from the serial of Y sensing, and needs to make respectively the serial of X sensing and the serial of Y sensing with two road processing procedures respectively.In addition, be provided with insulating pattern in the serial of X sensing and Y sensing serial staggered place more.The setting of insulating pattern has more increased the process complexity of capacitance type touch-control panel, and makes the making yield of contact panel be difficult for promoting.
Summary of the invention
In view of this, the invention provides a kind of contact panel, its processing procedure is simple, the making yield is high.
The invention provides a kind of driving method, it is suitable for driving the contact panel that above-mentioned processing procedure is simple, yield is high.
The invention provides a kind of contact panel, the control module that comprises substrate, is disposed at a plurality of sensing serials on the substrate and is electrically connected with the sensing serial.The sensing serial is parallel to each other and belong to same rete.Control module drives signal and reads the sensing signal that the adjacent sensing serial of therewith sensing serial is exported each sensing serial input respectively.Control module is judged the position of touch points according to these sensing signals.
The invention provides a kind of driving method.Described driving method is suitable for driving contact panel.Described contact panel has parallel to each other and belongs to a plurality of sensing serials of same rete.Described driving method comprises the following steps.Respectively each sensing serial input is driven signal and reads the sensing signal that the adjacent sensing serial of therewith sensing serial is exported.Judge the position of touch points according to these sensing signals.
In one embodiment of this invention, above-mentioned sensing serial is extended along the first direction arrangement and along second direction, and judge that according to sensing signal the step of touch points position comprises: find out at least one sensing signals different from other sensing signal in all sensing signals, to judge the position of touch points on first direction; Calculate the position of touch points on second direction according to the sensing signal different from other sensing signal.
In one embodiment of this invention, the sensing signal that above-mentioned basis is different from other sensing signal calculates the step of touch points in the position on the second direction and also comprises: according to the position of voltage saturation Time Calculation touch points on second direction of the sensing signal different with other sensing signal.
In one embodiment of this invention, above-mentioned sensing serial is divided into a plurality of sensing serial groups of arranging along first direction.Each sensing serial group comprises the first sensing serial adjacent one another are and the second sensing serial.The step that respectively each sensing serial input is driven signal and read the sensing signal that the adjacent sensing serial of therewith sensing serial exports is: respectively the first sensing serial input of each sensing serial group driven signal and read the sensing signal of the second sensing serial output of sensing serial group; Respectively the second sensing serial input of each sensing serial group driven signal and read the sensing signal of the first sensing serial output of sensing serial group.
In one embodiment of this invention, above-mentioned control module comprises multiplexer.Multiplexer drives signal and reads the sensing signal that the adjacent sensing serial of therewith sensing serial is exported each sensing serial input respectively.
In one embodiment of this invention, above-mentioned multiplexer drives signal and reads the sensing signal of the second sensing serial output of sensing serial group the first sensing serial input of each sensing serial group respectively.Multiplexer drives signal and reads the sensing signal of the first sensing serial output of this sensing serial group the second sensing serial input of each sensing serial group respectively.
In one embodiment of this invention, above-mentioned control module comprises counter.Counter calculates a plurality of capacitance variations values according to sensing signal, to judge the position of touch points.
In one embodiment of this invention, above-mentioned control module comprises the analog-to-digital device.The analog-to-digital device is converted to a plurality of digital values with a plurality of capacitance variations values.
In one embodiment of this invention, above-mentioned control module comprises central processing unit.Central processing unit calculates the position of touch points according to these digital values.
Based on above-mentioned, in contact panel of the present invention, all sensing serials all belong to same rete, and therefore the processing procedure of contact panel of the present invention is simple, the making yield is high.In addition, contact panel of the present invention also can realize detecting the function of touch point position by special type of drive (or control module).In other words, contact panel of the present invention not only has outside the function of detecting touch point position of known contact panel, has advantages of that also processing procedure is simple, it is high to make yield.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Fig. 1 is the schematic diagram of the contact panel of one embodiment of the invention;
Fig. 2 A illustrates the situation of the touch points on the contact panel that the user touches one embodiment of the invention;
Fig. 2 B is the equivalent circuit diagram of Fig. 2 A;
Fig. 3 A illustrates the situation of another touch points on the contact panel that the user touches one embodiment of the invention;
Fig. 3 B is the equivalent circuit diagram of Fig. 3 A.
[primary clustering symbol description]
100: contact panel
110: substrate
120: sensing serial group
120A: the first sensing serial group
120B: the second sensing serial group
122: the sensing serial
122a: the first sensing serial
122b: the second sensing serial
124: sensor pad
126: bridging line
130: control module
132: multiplexer
134: counter
136: analog-digital converter
138: central processing unit
140: the picture end
C
PA, C
PB, C
Finger, C
Body: electric capacity
D1: first direction
D2: second direction
O: output terminal
RX: sensing signal
TX: drive signal
Embodiment
Fig. 1 is the schematic diagram of the contact panel of one embodiment of the invention.Please refer to Fig. 1, the control module 130 that the contact panel 100 of the present embodiment comprises substrate 110, is disposed at a plurality of sensing serials 122 on the substrate 110 and is electrically connected with sensing serial 122.Each sensing serial 122 comprises a plurality of sensor pads 124 and a plurality of bridging line 126 of mutual serial connection.Each bridging line 126 connects two adjacent sensor pads 124.In the present embodiment, the external form of sensor pad 124 for example is rhombus, and the external form of bridging line 126 for example is rectangle.Yet the present invention is not limited to this, and in other embodiments, the demand of the visual reality of external form of sensing serial (comprising sensor pad and bridging line) is done suitable variation.
Please continue with reference to Fig. 1, the control module 130 of the present embodiment comprises multiplexer 132.Multiplexer 132 is in order to respectively to each sensing serial 122 input drive signal TX and read the sensing signal RX that therewith sensing serial 122 adjacent sensing serials 122 are exported.The control module 130 of the present embodiment also comprises counter 134.The sensing signal RX that counter 134 is exported in order to receive each sensing serial 122, and calculate in each frame (frame) time the capacitance variations value of each point on the contact panel 100 according to these sensing signals RX, to judge the position of touch points.The control module of the present embodiment also comprises analog-digital converter 136.Analog-to-digital device 136 is in order to be converted to a plurality of digital values with these capacitance variations values.The control module 130 of the present embodiment also comprises central processing unit 138.Central processing unit 138 can receive these digital values and calculate the position of touch points according to these digital values.In addition, central processing unit 138 also can be with Position input to the picture end 140 of touch points, and then makes the picture end make corresponding action.
It should be noted that in the present embodiment, all sensing serials 122 are parallel to each other and belong to same rete.See through control module 130, the sensing serial 122 that belongs to same rete still can be brought into play the function of detecting touch points position.The detailed description of below cooperation diagram.
Please continue with reference to Fig. 1, the control module 130 of the present embodiment can be respectively to each sensing serial 122 input drive signal TX and read the sensing signal RX that the in addition ㄧ sensing serial 122 adjacent with being transfused to the sensing serial 122 that drives signal TX exported.In detail, in the present embodiment, all sensing serials 122 can be divided into a plurality of sensing serial groups 120 of arranging along first direction D1.Each sensing serial group 120 comprises the first sensing serial 122a adjacent one another are and the second sensing serial 122b.In the present embodiment, control module 130 can be first to the first sensing serial 122a input drive signal TX of the first sensing serial group 120A and read the sensing signal RX that the second sensing serial 122b of the first sensing serial group 120A exports, and then to the second sensing serial 122b input drive signal TX of the first sensing serial group 120A and read the sensing signal RX that the first sensing serial 122a of the first sensing serial group 120A exports.Then, control module 130 can utilize similar mode to the first sensing serial 122a input drive signal TX of the second sensing serial group 120B and read the sensing signal RX of the second sensing serial 122b output of the second sensing serial group 120B, and then to the second sensing serial 122b input drive signal TX of the second sensing serial group 120B and read the sensing signal RX that the first sensing serial 122a of the second sensing serial group 120B exports.Control module 130 can be above-mentioned mode action that each sensing serial group 120 in the contact panel 100 is sequentially carried out input drive signal TX and read sensing signal RX, and then finish the detecting action of every bit on the contact panel 100.
Then, control module 130 can calculate the position of touch points on second direction D2 according to the above-mentioned sensing signal RX different from other sensing signal.Below collocation Fig. 2 A, Fig. 2 B, Fig. 3 A, Fig. 3 B explanation control module 130 are how to calculate the position of touch points on second direction D2 according to the sensing signal RX different from other sensing signal.
Fig. 2 A illustrates the situation of the touch points on the contact panel that the user touches one embodiment of the invention.Fig. 2 B is the equivalent circuit diagram of Fig. 2 A.Please refer to Fig. 2 A and Fig. 2 B, when user's finger touches during apart from output terminal O touch points A far away, the capacitance that the two sensing serials 122 that overlap with touch points A and user's finger consist of is C
PAUser's finger is C with the capacitance that contact panel 100 consists of
FingerUser's finger is C with the capacitance that ground wire consists of
BodyThe capacitance C that user's finger and contact panel 100 consist of
FingerPoint the capacitance C that consists of with ground wire with the user
BodyFor the equivalent capacitance value after the series connection is [(C
BodyC
Finger)/(C
Finger+ C
Body)].This equivalent capacitance [(C
BodyC
Finger)/(C
Finger+ C
Body)] and capacitance C
PATotal equivalent capacitance value C after the parallel connection
TotalABe { [(C
BodyC
Finger)/(C
Finger+ C
Body)]+C
PA.
Fig. 3 A illustrates the situation of another touch points on the contact panel that the user touches one embodiment of the invention.Fig. 3 B is the equivalent circuit diagram of Fig. 3 A.Please refer to Fig. 3 A and Fig. 3 B, when user's finger touches during apart from the nearer touch points B of output terminal O, the capacitance that the two sensing serials 122 that overlap with touch points B and user's finger consist of is C
PBEquivalent capacitance value [(C
BodyC
Finger)/(C
Finger+ C
Body)] and capacitance C
PBTotal equivalent capacitance value C after the parallel connection
TotalBBe { [(C
BodyC
Finger)/(C
Finger+ C
Body)]+C
PB.
Comparison diagram 2A and Fig. 3 A as can be known, therefore greater than sensor pad 124 quantity between touch points B and output terminal O, two sensing serials 122 and the user that is positioned at touch points A point the formation capacitor C in sensor pad 124 quantity between touch points A and the output terminal O
PAElectrode area point the formation capacitor C greater than two sensing serials 122 and the user that is positioned at touch points B
PBElectrode area.Capacitance size is directly proportional with electrode area again, therefore two sensing serials 122 and the user who is positioned at touch points A point the capacitance C of formation
PAPoint the capacitance C of formation greater than two sensing serials 122 and the user that is positioned at touch points B
PBBecause capacitance C
PAGreater than capacitance C
PB, in the situation that the user is same people, total equivalent capacitance value C
TotalAGreater than total equivalent capacitance value C
TotalBTherefore, the voltage saturation time of touch points A can be greater than the voltage saturation time of touch points B.In other words, when touch points was longer with the distance of output terminal O on second direction D2, the voltage saturation time of this touch points was longer.By this characteristic, control module 130 just can calculate the position of touch points on second direction D2.See through aforesaid way, control module 130 can calculate the position of touch points on first direction D1 and second direction D2, and then detects the tram of touch points.
In sum, in the contact panel of one embodiment of the invention, all sensing serials all belong to same rete, so the processing procedure of the contact panel of one embodiment of the invention is simple, the making yield is high.In addition, the contact panel of one embodiment of the invention also can realize detecting the function of touch point position by special type of drive (or control module).In other words, the contact panel of one embodiment of the invention not only has outside the function of detecting touch point position of known contact panel, has advantages of that also processing procedure is simple, it is high to make yield.
Although the present invention with embodiment openly as above; so it is not to limit the present invention; have in the technical field under any 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 looking aforesaid the claim person of defining.
Claims (10)
1. a driving method is suitable for driving a contact panel, it is characterized in that, this contact panel has a plurality of sensing serials parallel to each other, and those sensing serials belong to same rete, and this driving method comprises the following steps:
Respectively each this sensing serial input one is driven signal, and read the sensing signal that the sensing serial adjacent with this sensing serial exported; And
Judge the position of a touch points according to those sensing signals.
2. driving method as claimed in claim 1 is characterized in that, those sensing serials are extended along first direction arrangement and along a second direction, and judge that according to those sensing signals the step of this touch points position comprises:
Find out at least one this sensing signals different from other sensing signal in those sensing signals, to judge the position of this touch points on this first direction;
Calculate the position of this touch points on this second direction according to this sensing signal different from other sensing signal.
3. driving method as claimed in claim 2 is characterized in that, the step that calculates the position of this touch points on this second direction according to this sensing signal different from other sensing signal also comprises:
The position of this touch points of voltage saturation Time Calculation on this second direction according to this sensing signal different from other sensing signal.
4. driving method as claimed in claim 1, it is characterized in that, those sensing serials are divided into a plurality of sensing serial groups of arranging along a first direction, each this sensing serial group comprises one first sensing serial adjacent one another are and one second sensing serial, and respectively to each this driving signal of this sensing serial input and the step that reads this sensing signal that the sensing serial adjacent with this sensing serial export be:
Should drive signal to this first sensing serial input of each this sensing serial group respectively, and read this sensing signal of this second sensing serial output of this sensing serial group; And
Should drive signal to this second sensing serial input of each this sensing serial group respectively, and read this sensing signal of this first sensing serial output of this sensing serial group.
5. a contact panel is characterized in that, comprising:
One substrate;
A plurality of sensing serials, be disposed on this substrate, those sensing serials are parallel to each other and belong to same rete, and those sensing serials are divided into a plurality of sensing serial groups of arranging along a first direction, and each this sensing serial group comprises one first sensing serial adjacent one another are and one second sensing serial; And
One control module, be electrically connected with those sensing serials, this control module drives signal and reads the sensing signal that the sensing serial adjacent with this sensing serial exported each this sensing serial input one respectively, and this control module is judged the position of a touch points according to those sensing signals.
6. contact panel as claimed in claim 5 is characterized in that, this control module comprises: a multiplexer, and respectively to each this driving signal of this sensing serial input and read this sensing signal that the sensing serial adjacent with this sensing serial exported.
7. contact panel as claimed in claim 6, it is characterized in that, this multiplexer is respectively to this this driving signal of the first sensing serial input of each this sensing serial group and read this sensing signal of this second sensing serial output of this sensing serial group, and this multiplexer is respectively to this second sensing serial input this driving signal of each this sensing serial group and read this sensing signal that this first sensing serial of this sensing serial group is exported.
8. contact panel as claimed in claim 5 is characterized in that, this control module also comprises: a counter calculates a plurality of capacitance variations values according to those sensing signals, to judge the position of a touch points.
9. contact panel as claimed in claim 8 is characterized in that, this control module also comprises: an analog-to-digital device is converted to a plurality of digital values with those capacitance variations values.
10. contact panel as claimed in claim 9 is characterized in that, this control module also comprises: a central processing unit calculates the position of this touch points according to those digital values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210386228XA CN102955634A (en) | 2012-10-12 | 2012-10-12 | Touch panel and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210386228XA CN102955634A (en) | 2012-10-12 | 2012-10-12 | Touch panel and driving method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561738A (en) * | 2009-06-05 | 2009-10-21 | 超级先锋有限公司 | One-dimensional contact point positioning method of capacitive touch screen/board and capacitive touch screen/board |
| CN101661360A (en) * | 2009-09-07 | 2010-03-03 | 苏州超联光电有限公司 | Capacitive touch screen and manufacturing method thereof |
| CN101847065A (en) * | 2009-03-24 | 2010-09-29 | 宸鸿科技(厦门)有限公司 | Circuit structure of capacitance type touch control panel |
| CN102073426A (en) * | 2010-12-29 | 2011-05-25 | 广东中显科技有限公司 | Touch inductive circuit |
-
2012
- 2012-10-12 CN CN201210386228XA patent/CN102955634A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847065A (en) * | 2009-03-24 | 2010-09-29 | 宸鸿科技(厦门)有限公司 | Circuit structure of capacitance type touch control panel |
| CN101561738A (en) * | 2009-06-05 | 2009-10-21 | 超级先锋有限公司 | One-dimensional contact point positioning method of capacitive touch screen/board and capacitive touch screen/board |
| CN101661360A (en) * | 2009-09-07 | 2010-03-03 | 苏州超联光电有限公司 | Capacitive touch screen and manufacturing method thereof |
| CN102073426A (en) * | 2010-12-29 | 2011-05-25 | 广东中显科技有限公司 | Touch inductive circuit |
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Application publication date: 20130306 |