CN103713782A - Capacitive touch panel - Google Patents
Capacitive touch panel Download PDFInfo
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- CN103713782A CN103713782A CN201210440337.5A CN201210440337A CN103713782A CN 103713782 A CN103713782 A CN 103713782A CN 201210440337 A CN201210440337 A CN 201210440337A CN 103713782 A CN103713782 A CN 103713782A
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- sensor pad
- sensing serials
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- type touch
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- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The invention discloses a capacitive touch panel which comprises a plurality of first sensing series and a plurality of second sensing series. The area of the second sensing pads of the second sensing series used for transmitting the sensing signal is reduced, so that the interference voltage of the charger noise is suppressed.
Description
Technical field
The present invention relates to a kind of contact panel, and particularly relate to a kind of contact panel that reduces noise.
Background technology
Contact panel is divided into electric resistance touch-control panel, capacitance type touch-control panel, optical touch control panel, sound wave type contact panel and electromagnetic touch-control panel haply according to the difference of its sensing mode.Because capacitance type touch-control panel has, the reaction time is fast, fiduciary level is good and durability advantages of higher, and therefore, capacitance type touch-control panel is widely used in electronic product.
Capacitance type touch-control panel is via finger or conductive material is close or touching contact panel, and the capacitance of contact panel is changed.When touch panel detection arrives capacitance variation, just can judge the position that finger or conductive material are close or touch, and carry out the corresponding feature operation of touch position.Owing to being limited to the restriction of power supply capacity, electronic product now,, while often there is needing the situation that charge and use in for example mobile phone, panel computer etc.Yet, when electronic product is being connected under the situation of charger, charger is converted to alternating voltage the noise producing in the process of DC voltage, earth terminal by electronic product chips circuit is affected to the detecting result of capacitance, and then occur the situation of degradation reduction using character under touch point misjudgment or touch-control sensitivity.
Summary of the invention
The object of the present invention is to provide a kind of capacitance type touch-control panel, can effectively lower the impact of the caused noise of charger on touch control operation.
For reaching above-mentioned purpose, the present invention proposes a kind of capacitance type touch-control panel, and it comprises a plurality of the first sensing serials and a plurality of the second sensing serials.A plurality of the first sensing serials are extended along first direction, and each first sensing serials comprises a plurality of the first sensor pads connected to one another.A plurality of the second sensing serials are extended along second direction, and staggered with above-mentioned a plurality of the first sensing serials, each second sensing serials comprises a plurality of the second sensor pads, wherein the area of each second sensor pad is less than the area of each first sensor pad, and each second sensor pad comprises the first sub-sensor pad and a plurality of the second sub-sensor pad, mutual electrical couplings between the first sub-sensor pad and above-mentioned a plurality of the second sub-sensor pad wherein.
In one embodiment of this invention, the first above-mentioned sensing is paid somebody's debt and expected repayment later and is comprised that a plurality of branching portions, each branching portion are disposed at respectively between two above-mentioned the second sub-sensor pads corresponding with it, and respectively with corresponding two above-mentioned the second sub-sensor pad electrical couplings.
In one embodiment of this invention, wherein in same the second sensing serials, the first sub-sensor pad in wantonly two adjacent the second sensor pads is connected to each other by bridging line.
In one embodiment of this invention, wherein, in same the first sensing serials, wantonly two the first adjacent sensor pads are connected to each other by bridging line.
In one embodiment of this invention, the first above-mentioned sensing serials is in order to transmit sweep signal, and the second sensing serials is in order to transmit sensing signal.
In one embodiment of this invention, the vertical second direction of above-mentioned first direction.
The present invention proposes a kind of capacitance type touch-control panel, comprises a plurality of the first sensing serials and a plurality of the second sensing serials.A plurality of the first sensing serials are extended along first direction, and each first sensing serials comprises a plurality of the first sensor pads connected to one another.A plurality of the second sensing serials are extended along second direction, and staggered with above-mentioned a plurality of the first sensing serials, and each second sensing serials comprises a plurality of the second sensor pads connected to one another, and wherein the area of each second sensor pad is less than the area of each first sensor pad.
In one embodiment of this invention, wherein, in same the first sensing serials, wantonly two the first adjacent sensor pads are connected to each other by bridging line.
In one embodiment of this invention, wherein, in same the second sensing serials, wantonly two the second adjacent sensor pads are connected to each other by bridging line.
In one embodiment of this invention, the second above-mentioned sensor pad is arrowhead form.
In one embodiment of this invention, the first above-mentioned sensor pad is arrowhead form.
In one embodiment of this invention, the first above-mentioned sensing serials is in order to transmit sweep signal, and the second sensing serials is in order to transmit sensing signal.
In one embodiment of this invention, the second above-mentioned sensing serials is in order to transmit sweep signal, and the first sensing serials is in order to transmit sensing signal.
In one embodiment of this invention, the vertical second direction of above-mentioned first direction.
Based on above-mentioned, the present invention is by dwindling to transmit the sensor pad area in the sensing serials of sensing signal, to suppress the interference voltage of charger noise, and then improves the problem that touch point misjudgment or touch-control sensitivity decline.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate appended accompanying drawing to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the capacitance type touch-control panel of one embodiment of the invention;
Fig. 2 is the schematic equivalent circuit of the capacitance type touch-control panel of Fig. 1 embodiment;
Fig. 3 ~ Fig. 6 is the schematic diagram of the capacitance type touch-control panel of the embodiment of the present invention.
Main element symbol description
100: capacitance type touch-control panel
102: the first sensing serials
104: the second sensing serials
102A: the first sensor pad
104A: the second sensor pad
102B, 104B: bridging line
TX: sweep signal
RX: sensing signal
104A1: the first sub-sensor pad
104A2: the second sub-sensor pad
Cm1, Cm2: background capacitance
Cearth: self-capacitance over the ground
T1: input end
T2: output terminal
ADC: analog-digital converter
B1: branching portion
Embodiment
Fig. 1 illustrates the schematic diagram into the capacitance type touch-control panel of one embodiment of the invention.Please refer to Fig. 1, capacitance type touch-control panel 100 comprises a plurality of the first sensing serials 102 and a plurality of the second sensing serials 104, wherein a plurality of the first sensing serials 102 are to extend along first direction (that is the directions X shown in Fig. 1), and with along second direction (that is the Y-direction shown in Fig. 1, first direction is mutually vertical with second direction in the present embodiment) mode of arranging configures, a plurality of the second sensing serials 104 are to extend along second direction, and the mode of arranging with first direction configures, the first sensing serials 102 and the second sensing serials 104 are staggered.For ease of explanation, Fig. 1 only shows first sensing serials 102 and second sensing serials 104.
As shown in Figure 1, each first sensing serials 102 comprises a plurality of the first sensor pad 102A connected to one another, and each second sensing serials 104 comprises a plurality of the second sensor pad 104A, and wherein the area of the second sensor pad 104A is less than the area of the first sensor pad 102A.In the present embodiment, the first sensor pad 102A is that the second sensing serials 104 is in order to transmit sensing signal RX in order to transmit sweep signal TX.
In addition, in the first sensing serials 102 in the present embodiment, two the first adjacent sensor pad 102A are connected to each other by bridging line 102B.And in the second sensing serials 104, the first sensor pad 102A is split into a first sub-sensor pad 104A1 and 4 the second sub-sensor pad 104A2, the sub-sensor pad 104A1 of each second sub-sensor pad 104A2 electrical couplings to the first wherein, and also mutual electrical couplings between each second sub-sensor pad 104A2, the first sub-sensor pad 104A1 in two adjacent the second sensor pad 104A is connected to each other by bridging line 104B.In addition, the area summation of the first sub-sensor pad 104A1 and each the second sub-sensor pad 104A2 is less than the first sensor pad 102A.That is to say, compared to all identical design of the sensor pad size of traditional contact panel, the present embodiment reduction is in order to transmit the size of the second sensor pad 104A of the second sensing serials 104 of sensing signal RX.
Wherein, between the first adjacent sensor pad 102A and the second sensor pad 104A, will form background capacitance Cm1, and also can form background capacitance Cm2 between the first sub-sensor pad 104A1 and a plurality of the second sub-sensor pad 104A2, in addition, between the second sensor pad 104A and earth terminal, can form self-capacitance Cearth over the ground.Wherein the caused noise of charger will produce from earth terminal, and is coupled to output terminal T2 by self-capacitance Cearth over the ground, and then affects the detecting result of touch-control.
Background capacitance Cm1, Cm2 and the formed equivalent electrical circuit of self-capacitance Cearth can be as shown in Figure 2 over the ground, wherein background capacitance Cm1 and background capacitance Cm2 are series between the input end T1 of sweep signal TX and the output terminal T2 of output sensing signal RX, and self-capacitance Cearth is coupled between output terminal T2 and earth terminal over the ground.Output terminal T2 is coupled to an analog-digital converter ADC, transfers sensing signal RX to digital signal.
It should be noted that, the background capacitance Cm1 of the present embodiment indication is the summation that is scanned formed electric capacity between the second sensor pad 104A that each the first sensor pad 102A in the first sensing serials 102 that signal TX drives is adjacent, the schematic diagram of the background capacitance Cm1 that Fig. 1 illustrates for simplifying.Similarly, the background capacitance Cm2 of the present embodiment indication for and be scanned the summation of the electric capacity forming between the first sub-sensor pad 104A1 and a plurality of the second sub-sensor pad 104A2 in the second sensor pad 104A that each first sensor pad 102A in the first sensing serials 102 that signal TX drives is adjacent, the background capacitance Cm2 that Fig. 1 illustrates is the schematic diagram of simplification.
As shown in Figure 2, owing to being compared to the sensor pad of traditional contact panel, the present embodiment is reduced in order to transmit the area of the second sensor pad 104A of sensing signal RX, thereby second the formed Cearth of self-capacitance over the ground between sensor pad 104A and earth terminal little by what will come compared with conventional art, so just can suppress significantly the interference of charger noise to sensing signal RX.Under situation below the area reducing to 1/2 of the second sensor pad 104A, can charger noise be suppressed for original below 1/2 to the interference of sensing signal RX.And the shape that maintains the first sensor pad 102A does not carry out, as the cutting apart of the second sensor pad 104A, can avoiding improving the resistance value of the first sensing serials 102 to it.
In addition, the result that the second sensor pad 104A is divided into a first sub-sensor pad 104A1 and a plurality of the second sub-sensor pad 104A2, declines background capacitance significantly.As shown in Figure 2.Between the first sensor pad 102A and the second sensor pad 104A, only there is background capacitance Cm1 when the second sensor pad 104A not being cut apart, and by the second sensor pad 104A is cut apart, can additionally form the background capacitance Cm2 connecting with background capacitance Cm1, just can significantly reduce thus the capacitance of background capacitance.And due to cutting apart of the second sensor pad 104A can't opponent's fingering row touch control operation time formed finger electric capacity produce significant impact, thereby the assorted ratio of the news that can improve the received sensing signal RX of analog-digital converter ADC, not allowing under the saturated situation of the numerical code of analog-digital converter ADC, can sense larger finger capacitance.Required power consumption when in addition, less background capacitance also can reduce the first sensing serials 102 and discharges and recharges.
It should be noted that, above-mentioned the second sensor pad 104A's cuts apart the mode being not limited to as Fig. 1 embodiment, the schematic diagram of the capacitance type touch-control panel of another embodiment of the present invention as shown in Figure 3, also the second sensor pad 104A can be divided into a first sub-sensor pad 104A1 and 6 the second sub-sensor pad 104A2, and the shape of the first sub-sensor pad 104A1 and the second sub-sensor pad 104A2 does not limit yet, as second of the present embodiment the sub-sensor pad 104A2 can comprise rhombus and triangle.
In addition, also can reduce background capacitance, the schematic diagram of the capacitance type touch-control panel of another embodiment of the present invention as shown in Figure 4 by changing the shape of the first sensor pad 102A.In the present embodiment, the first sensor pad 102A more comprises a plurality of branching portion B1, wherein, each branching portion B1 is configured in respectively between two the second sub-sensor pad 104A2 corresponding with it, and respectively with corresponding two the second sub-sensor pad 104A2 electrical couplings, so just can increase the electric capacity of connecting with background capacitance, further to reduce background capacitance.
It should be noted that, in part embodiment, can the second sensor pad 104A not cut apart yet, and only to change the mode of shape, carry out acreage reduction, the schematic diagram of the capacitance type touch-control panel of another embodiment of the present invention as shown in Figure 5, the second sensor pad 104A can be changed into the shape of arrow, to reduce the area of the second sensor pad 104A.In addition, in other embodiments, also the first sensor pad 102A and the second sensor pad 104A all can be changed into the shape (as shown in Figure 6) of arrow, to meet in part embodiment, need to be by the application of the first sensing serials 102 and the second sensing serials 104 role exchanges.
In sum, the present invention in order to transmit the size of the second sensor pad of the second sensing serials of sensing signal, suppresses the interference of charger noise to sensing signal by reduction.In addition and can be by the second sensor pad is cut apart, to reduce the capacitance of background capacitance, improve the assorted ratio of news of sensing signal, and required power consumption when reducing the first sensing serials and discharging and recharging.
Although disclosed the present invention in conjunction with above embodiment; yet it is not in order to limit the present invention; under any, in technical field, be familiar with this operator; without departing from the spirit and scope of the present invention; can do a little change and retouching, thus protection scope of the present invention should with enclose claim was defined is as the criterion.
Claims (14)
1. a capacitance type touch-control panel, comprising:
A plurality of the first sensing serials, extend along a first direction, and respectively this first sensing serials comprises a plurality of the first sensor pads connected to one another; And
A plurality of the second sensing serials, along a second direction, extend, and staggered with those first sensing serials, respectively this second sensing serials comprises a plurality of the second sensor pads, wherein respectively the area of this second sensor pad is less than the respectively area of this first sensor pad, and respectively this second sensor pad comprises:
The first sub-sensor pad; And
A plurality of the second sub-sensor pads, wherein mutual electrical couplings between this first sub-sensor pad and those the second sub-sensor pads.
2. capacitance type touch-control panel as claimed in claim 1, wherein this first sensing is paid somebody's debt and expected repayment later and is comprised a plurality of branching portions, respectively this branching portion is disposed at respectively between two above-mentioned the second sub-sensor pads corresponding with it, and respectively with corresponding two above-mentioned the second sub-sensor pad electrical couplings.
3. capacitance type touch-control panel as claimed in claim 1, wherein in same the second sensing serials, the first sub-sensor pad in wantonly two adjacent the second sensor pads is connected to each other by a bridging line.
4. capacitance type touch-control panel as claimed in claim 1, wherein, in same the first sensing serials, wantonly two the first adjacent sensor pads are connected to each other by a bridging line.
5. capacitance type touch-control panel as claimed in claim 1, wherein those first sensing serials are in order to transmit sweep signal, and those second sensing serials are in order to transmit sensing signal.
6. capacitance type touch-control panel as claimed in claim 1, wherein vertical this second direction of this first direction.
7. a capacitance type touch-control panel, comprising:
A plurality of the first sensing serials, extend along a first direction, and respectively this first sensing serials comprises a plurality of the first sensor pads connected to one another; And
A plurality of the second sensing serials, extend along a second direction, and staggered with those first sensing serials, and respectively this second sensing serials comprises a plurality of the second sensor pads connected to one another, and wherein respectively the area of this second sensor pad is less than the respectively area of this first sensor pad.
8. capacitance type touch-control panel as claimed in claim 7, wherein, in same the first sensing serials, wantonly two the first adjacent sensor pads are connected to each other by a bridging line.
9. capacitance type touch-control panel as claimed in claim 7, wherein, in same the second sensing serials, wantonly two the second adjacent sensor pads are connected to each other by a bridging line.
10. capacitance type touch-control panel as claimed in claim 7, wherein this second sensor pad is an arrowhead form.
11. capacitance type touch-control panels as claimed in claim 10, wherein this first sensor pad is an arrowhead form.
12. capacitance type touch-control panels as claimed in claim 7, wherein those first sensing serials are in order to transmit sweep signal, and those second sensing serials are in order to transmit sensing signal.
13. capacitance type touch-control panels as claimed in claim 7, wherein those second sensing serials are in order to transmit sweep signal, and those first sensing serials are in order to transmit sensing signal.
14. capacitance type touch-control panels as claimed in claim 7, wherein vertical this second direction of this first direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101136529A TWI476669B (en) | 2012-10-03 | 2012-10-03 | Capacitive touch panel |
| TW101136529 | 2012-10-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103713782A true CN103713782A (en) | 2014-04-09 |
| CN103713782B CN103713782B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210440337.5A Expired - Fee Related CN103713782B (en) | 2012-10-03 | 2012-11-07 | Capacitive touch panel |
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| Country | Link |
|---|---|
| CN (1) | CN103713782B (en) |
| TW (1) | TWI476669B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106201131A (en) * | 2015-05-28 | 2016-12-07 | 乐金显示有限公司 | Fingerprint sensor integrated form touch panel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI584184B (en) | 2016-02-19 | 2017-05-21 | 聯陽半導體股份有限公司 | Touch detection device and touch detection method |
| TWI688892B (en) * | 2019-04-12 | 2020-03-21 | 友達光電股份有限公司 | Touch display device |
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|---|---|---|---|---|
| CN101566900A (en) * | 2008-04-15 | 2009-10-28 | 株式会社日立显示器 | Display device |
| US20110175671A1 (en) * | 2010-01-15 | 2011-07-21 | Synaptics Incorporated | Input device with floating electrodes having at least one aperture |
| CN102339188A (en) * | 2008-06-30 | 2012-02-01 | 株式会社日立显示器 | Touch panel |
| CN102419654A (en) * | 2011-09-30 | 2012-04-18 | 苏州瀚瑞微电子有限公司 | Wiring structure of induction layer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI360772B (en) * | 2008-10-13 | 2012-03-21 | Coretronic Corp | Capacitive touch pad and touch point detecting met |
| KR101035967B1 (en) * | 2009-04-01 | 2011-05-23 | 주식회사 애트랩 | Touch sensor device |
| JP5295914B2 (en) * | 2009-09-18 | 2013-09-18 | 株式会社ジャパンディスプレイ | Display device |
| TWM393740U (en) * | 2010-07-23 | 2010-12-01 | Young Fast Optoelectronics Co | Capacitive touch sensor structure |
| TWM422117U (en) * | 2010-12-30 | 2012-02-01 | Egalax Empia Technology Inc | Capacitive touch screen |
| TWI475451B (en) * | 2011-01-07 | 2015-03-01 | Egalax Empia Technology Inc | Capacitive sensor and detection method using the same |
-
2012
- 2012-10-03 TW TW101136529A patent/TWI476669B/en not_active IP Right Cessation
- 2012-11-07 CN CN201210440337.5A patent/CN103713782B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566900A (en) * | 2008-04-15 | 2009-10-28 | 株式会社日立显示器 | Display device |
| CN102339188A (en) * | 2008-06-30 | 2012-02-01 | 株式会社日立显示器 | Touch panel |
| US20110175671A1 (en) * | 2010-01-15 | 2011-07-21 | Synaptics Incorporated | Input device with floating electrodes having at least one aperture |
| CN102419654A (en) * | 2011-09-30 | 2012-04-18 | 苏州瀚瑞微电子有限公司 | Wiring structure of induction layer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106201131A (en) * | 2015-05-28 | 2016-12-07 | 乐金显示有限公司 | Fingerprint sensor integrated form touch panel |
| US10176358B2 (en) | 2015-05-28 | 2019-01-08 | Lg Display Co., Ltd. | Fingerprint sensor integrated type touch screen panel |
| CN106201131B (en) * | 2015-05-28 | 2019-04-23 | 乐金显示有限公司 | Fingerprint sensor integrated form touch screen panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103713782B (en) | 2016-09-07 |
| TW201415332A (en) | 2014-04-16 |
| TWI476669B (en) | 2015-03-11 |
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Granted publication date: 20160907 |