CN100368975C - Capacitance type touch panel and detection method thereof - Google Patents
Capacitance type touch panel and detection method thereof Download PDFInfo
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- CN100368975C CN100368975C CNB2004101031395A CN200410103139A CN100368975C CN 100368975 C CN100368975 C CN 100368975C CN B2004101031395 A CNB2004101031395 A CN B2004101031395A CN 200410103139 A CN200410103139 A CN 200410103139A CN 100368975 C CN100368975 C CN 100368975C
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- touch control
- inductor
- capacitive touch
- control plate
- axis signal
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- 238000001514 detection method Methods 0.000 title claims description 17
- 230000008859 change Effects 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 18
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to a capacitance touch control board in a dual shaft unequally spaced alternating expression induction scanning mode, which comprises two shafts and a plurality of inductors which are arranged in an unequally spaced interlaced mode and are respectively connected with the two shafts. Capacitance variations generated by the inductors generate Z-axis signals with leading or backward phases, and the Z-axis signals pass to judge the sliding moving direction of fingers on the capacitance touch control board.
Description
Technical field
The present invention relates to a kind of capacitive touch control plate, particularly about a kind of capacitive touch control plate of twin shaft unequal interval alternating expression sensitive scanning.
Background technology
Capacitive touch control plate has been widely used as the indicator device of computer system.Traditional capacitive touch control plate judges that by the capacitance change by the many inductors that detect the matrix form configuration finger touches the position of its panel, and its amount of movement and translational speed are judged in the variation of the position of being touched by finger.Application on mouse Z axle is shown in Figure 1A and Figure 1B, on capacitive touch control plate 10, have a plurality of inductors 12, each inductor 12 corresponding separately one is trace independently, this trace X1-X8 constitutes row's sweep trace 16, when finger touches capacitive touch control plate 10, produce capacitance change shown in Figure 1B through scanning this inductor 12, judge the position of finger on panel according to this, for example the distribution among Figure 1B is represented to point on the inductor that trace X5 connects.When finger when sliding on Trackpad 10, also move thereupon the position that produces the capacitance change maximum, and its amount of movement and translational speed are judged in the variation of the position of being touched by finger, send the Z axis signal after conversion.
Yet, when the number of inductor 12 the more the time, the number of its corresponding trace just the more, and the application circuits in the controller 14 of Trackpad 10 are also and then complicated, so the size of chip, it makes also relative raising with packaging cost.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of capacitive touch control plate and detection method thereof.
Another technical matters that the present invention will solve provides a kind of capacitive touch control plate that reduces number of traces.
Another technical matters that the present invention will solve provides the capacitive touch control plate that simple, with low cost and the easy and general Z axle mouse circuit of a kind of application circuit is integrated.
According to the present invention, a kind of capacitive touch control plate comprises that two respectively connect a plurality of inductors, and this inductor is arranged with the unequal interval interlace mode.
According to the present invention, a kind of detection method of capacitive touch control plate, this capacitive touch control plate contains first and second and connects this first and second axle respectively with a plurality of inductors that the unequal interval interlace mode is arranged, this method comprises the capacitance change that detects this inductor, with produce first with second axis signal, and the moving direction that on this capacitive touch control plate, slides according to this first waveform phase judgement of deriving with second axis signal.
According to the present invention, a kind of capacitive touch control plate that is applied to mouse Z axle, comprise two and connect these two respectively with a plurality of inductors that the unequal interval interlace mode is arranged, the capacitance change that this inductor produces produces phase-lead or backwardness on these two Z axis signal nationality carries out scrolling with the scroll bar to a form.
According to capacitive touch control plate of the present invention and detection method thereof, as long as sliding, finger can produce cyclical signal on capacitive touch control plate, do not need just can reach easily the design of mouse Z axle, solve the problem that the single formula sensitive scanning of known multitrace need can emulation be sent the Z axis signal through very complicated circuit computing and transfer process through complicated circuit computing.
In addition, the designed mouse Z axle of cyclical signal that produces according to the present invention has the structure identical with idler wheel mouse, therefore can be easily together circuit integrated with general Z axle mouse, do not need to pass through again complicated circuit computing and conversion, and needn't use a large amount of traces, make that application circuit is comparatively simple, cost descends.
Description of drawings
Figure 1A is the synoptic diagram of known capacitive touch control plate.
Figure 1B is the synoptic diagram that the capacitive touch control plate of Figure 1A detects the capacitance change that produces.
Fig. 2 is the synoptic diagram according to capacitive touch control plate of the present invention.
(a) is the synoptic diagram of the capacitance change that detect to produce of the capacitive touch control plate of Fig. 2 among Fig. 3.
(b) is the synoptic diagram of the capacitance change that detect to produce of the capacitive touch control plate of Fig. 2 among Fig. 3.
(c) is the synoptic diagram of the capacitance change that detect to produce of the capacitive touch control plate of Fig. 2 among Fig. 3.
(d) is the synoptic diagram of the capacitance change that detect to produce of the capacitive touch control plate of Fig. 2 among Fig. 3.
Fig. 4 A is the synoptic diagram of the phase-lead waveform of Fig. 2 capacitive touch control plate generation.
Fig. 4 B is the synoptic diagram of the phase lag waveform of Fig. 2 capacitive touch control plate generation.
Fig. 5 is applied to the synoptic diagram of the Z axis mechanism of mouse for the capacitive touch control plate of Fig. 2.
Fig. 6 is a system block diagrams of the present invention.
Fig. 7 is the functional block diagram of the simulation square among Fig. 6.
Fig. 8 is synoptic diagram according to another embodiment of the present invention.
Fig. 9 is synoptic diagram according to still another embodiment of the invention.
10 capacitive touch control plates, 12 inductors
14 controllers, 16 sweep traces
22 of 20 capacitive touch control plates
24 26 inductors
28 inductors, 50 mouses
52Z axis mechanism 602Z axle sensor
604 signal processing units, 606 simulation squares
608 microcontroller 610SRAM
612ROM 614 digital squares
616 mouse 618Z axis mechanisms
620 connecting lines, 622 computing machines
702 multiplexers, 704 current sources
706 amplifiers, 708 digital to analog converters
710 analog-to-digital converters, 712 digital squares
82 of 80 capacitive touch control plates
84 86
91 92
94 of 93 uranium
95c inductor 96 inductors
Embodiment
According to the present invention, a kind of capacitive touch control plate of twin shaft unequal interval alternating expression sensitive scanning have axle 22 and 24 on the capacitive touch control plate 20, and a plurality of inductor 26 and 28 is arranged with the unequal interval interlace mode as shown in Figure 2, inductor 26 coupling shafts 22, inductor 28 coupling shafts 24.
With reference to Fig. 2, a kind of method that detects capacitive touch control plate 20, comprise and detecting on the axle 22 and 24 with the inductor 26 of unequal interval interlace mode arrangement and 28 capacitance change, produce axle 22 and 24 signals, then set and change the accurate position of voltage according to this capacitance change, produce the waveform phase of axle 22 and 24, judge the moving direction of the slip on capacitive touch control plate 20 at last according to this waveform phase.
Fig. 3 (a)-(d) is the synoptic diagram of the capacitance change that detects capacitive touch control plate 20 and produced.When finger from capacitive touch control plate 20 tops when the lower slider, at first touching does not have position of inductor, the capacitance change that is produced is shown in (a), then touch inductor 26, the capacitance change that is produced is shown in (b), touch inductor 26 and 28 afterwards simultaneously, the capacitance change that is produced is shown in (c), and then touch inductor 28, the capacitance change that is produced is shown in (d), touching does not at last have position of inductor again, and the capacitance change that is produced so promptly produces a periodic signal that slides from top to bottom shown in (a).Similarly, when finger when up slide in capacitive touch control plate 20 belows, at first touching does not have position of inductor, the capacitance change that is produced is shown in (a), then touch inductor 28, the capacitance change that is produced is shown in (d), touch inductor 28 and 26 afterwards simultaneously, the capacitance change that is produced is shown in (c), and then touch inductor 26, and the capacitance change that is produced is shown in (b), and touching does not at last have position of inductor again, the capacitance change that is produced produces a periodic signal that slides from lower to upper shown in (a).Produce the voltage waveform of a phase-lead shown in Fig. 4 A according to the periodic signal that slides from top to bottom, and produce the voltage waveform of a phase lag shown in Fig. 4 B according to the periodic signal that slides from lower to upper, interdependent signal shown in Fig. 4 A and Fig. 4 B promptly is similar to the characteristic of mouse Z shaft roller, therefore according to capacitive touch control plate of the present invention and detection method thereof, as long as sliding, finger can produce cyclical signal on capacitive touch control plate, do not need just can reach easily the design of mouse Z axle, solve the problem that the single formula sensitive scanning of known multitrace need can emulation be sent the Z axis signal through very complicated circuit computing and transfer process through complicated circuit computing.
In addition, the designed mouse Z axle of cyclical signal that produces according to the present invention has the structure identical with idler wheel mouse, therefore can be easily together circuit integrated with general Z axle mouse, do not need to pass through again complicated circuit computing and conversion, and needn't use a large amount of traces, make that application circuit is comparatively simple, cost descends.
Fig. 5 is applied in the synoptic diagram of the z axis mechanism 52 of mouse 50 for the capacitive touch control plate 20 of Fig. 2.The detection method of matching with capacitive Trackpad is judged the moving direction that finger slides, and is controlled at the rolling function of the scroll bar on the window with moving direction.
Fig. 6 is a system block diagrams of the present invention, native system comprises Z axle sensor 602 and signal processing unit 604, the signal that Z axle sensor 602 is sensed is handled the back via the simulation square 606 in the signal processing unit 604, digital square 614, microcontroller 608, SRAM610 and ROM612 and is produced a Z axis signal, this Z axis signal can be applicable in the Z axis mechanism 618 of mouse 616, and, reach the rolling function of the scroll bar on computing machine 622 forms by being connected with computing machine 622 via USB or PS/2 interface by connecting line 620.
Fig. 7 is the functional block diagram of simulation square 606 among Fig. 6, comprise that two Z axis signal Z1, Z2 import a multiplexer 702, one current source 704 connects the output of multiplexer 702, to provide electric current to produce voltage signal V1 and V2, one digital to analog converter 708 provides a voltage level to amplifier 706, one analog-to-digital converter 710 connects the output terminal of amplifier 706, with the analog signal conversion with amplifier 706 outputs is digital signal, and by transfer to microcontroller 608 processing by digital square 712, to produce the voltage waveform of phase-lead or phase lag.
According to the present invention, the capacitive touch control plate of another embodiment as shown in Figure 8, capacitive touch control plate 80 increases asessory shaft 86 between axle 82 and 84, similarly, coupling shaft 82 and 84 a plurality of inductor 88a and 88b arrange with the unequal interval interlace mode, a plurality of inductor 88C of coupling shaft 86 are interspersed between inductor 88a and the 88b, axle 82 is identical with the function of 84 function and Fig. 2 axis 22 and 24, and detect inductor 88C produce a signal of spools 86 can be as the reference value of axle 82 and 84, the benchmark of signal magnitude for example.
According to the present invention, the capacitive touch control plate of another embodiment has axle 91,92,93 and 94 as shown in Figure 9 on the capacitive touch control plate 90, and its axis 94 can have individual arbitrarily.Coupling shaft 91 and 92 a plurality of inductor 95a and 95b arrange with the unequal interval interlace mode, axle 93 connects a plurality of inductor 95C between inductor 95a and 95b, a plurality of inductors 96 that axle 94 connects are also between inductor 95a and 95b, for the cause of clear expression, be moved to the right side among the figure.Axle 91 is identical with the function of 92 function and Fig. 2 axis 22 and 24, detecting the signal that inductor 95C produces axle 93 can be as the reference value of axle 91 and 92, and detect inductor 96 produces spools 94 signal can be as the capacitance change of auxiliary reference judgement spools 91 and 92.
As Fig. 8 and capacitive touch control plate 80 and 90 shown in Figure 9, the loss of signal in the time of can reducing finger and slide on capacitive touch control plate increases the degree of accuracy of capacitive touch control plate.
More than the narration done for preferred embodiment of the present invention be in order to illustrate technical characterictic of the present invention, and be not intended to limit claim scope of the present invention, based on above instruction or to make an amendment or change from embodiments of the invention study be possible, embodiment explains orally principle of the present invention and allows to have the knack of this operator and utilize the present invention in practical application and select and narration with various embodiment, and technological thought attempt of the present invention is decided by following claim and equalization thereof.
Claims (13)
1. a capacitive touch control plate is characterized in that, comprising:
First and second axle; And
A plurality of first and second inductors connect first and second axle respectively, and arrange with the unequal interval interlace mode.
2. capacitive touch control plate as claimed in claim 1 is characterized in that, this Trackpad also comprises:
One the 3rd; And
A plurality of and the 3rd the 3rd inductor that is connected are interspersed between first and second adjacent inductor.
3. capacitive touch control plate as claimed in claim 2 is characterized in that, this Trackpad also comprises:
The 4th of one or more any increases; And
A plurality of and the 4th the 4th inductor that is connected are interspersed between first and second adjacent inductor.
4. the detection method of a capacitive touch control plate is characterized in that, this capacitive touch control plate contain first and second the axle, and a plurality of with staggered first and second inductor of unequal interval connect respectively first and second the axle, this method comprises the following steps:
Detect the capacitance change of inductor, to produce first and second axis signal; And
Judge the moving direction that on this capacitive touch control plate, slides according to the waveform phase that first and second axis signal is derived.
5. detection method as claimed in claim 4 is characterized in that, this method also comprises the accurate position of setting and change voltage according to capacitance change, to change the waveform phase that first and second axis signal is derived.
6. detection method as claimed in claim 4, it is characterized in that wherein the waveform phase of deriving according to first and second axis signal judges that the step of the moving direction that slides comprises that this two waveform phase of judgement is phase-lead or phase lag on this capacitive touch control plate.
7. the detection method of a capacitive touch control plate, it is characterized in that, this capacitive touch control plate contains first, second and the 3rd, a plurality of with staggered first and second inductor of unequal interval connect respectively first and second the axle, and be connected with the 3rd and be interspersed in the 3rd inductor between first and second adjacent inductor, this method comprises the following steps:
Detect the capacitance change of first to the 3rd inductor, to produce first to the 3rd axis signal; And
Judge the moving direction that on this capacitive touch control plate, slides according to the waveform phase that first and second axis signal is derived;
Wherein, the 3rd axis signal is as the benchmark of first and second axis signal.
8. detection method as claimed in claim 7 is characterized in that, this method also comprises the accurate position of setting and change voltage according to the capacitance change of first and second inductor, to change the waveform phase that first and second axis signal is derived.
9. detection method as claimed in claim 7, it is characterized in that, wherein the waveform phase of deriving according to first and second axis signal is judged the step of the moving direction that slides on this capacitive touch control plate, comprises judging that this two waveform phase is phase-lead or phase lag.
10. the detection method of a capacitive touch control plate, it is characterized in that, this capacitive touch control plate contains first, second, the 3rd and the 4th, a plurality of with staggered first and second inductor of unequal interval connect respectively first and second the axle, and be connected with the 3rd and the 4th and be interspersed in the 3rd and the 4th inductor between first and second adjacent inductor, this method comprises the following steps:
Detect the capacitance change of first to fourth inductor, to produce first to fourth axis signal; And
Judge the moving direction that on this capacitive touch control plate, slides according to the waveform phase that first and second axis signal is derived;
Wherein, the 3rd axis signal is as the reference value of this first and second axis signal, and the 4th axis signal auxiliary reference is judged first and second capacitance change.
11. detection method as claimed in claim 10 is characterized in that, this method also comprises the accurate position of setting and change voltage according to the capacitance change of this first and second inductor, to change the waveform phase that this first and second axis signal is derived.
12. detection method as claimed in claim 10, it is characterized in that, wherein the waveform phase of deriving according to this first and second axis signal is judged the step of the moving direction that slides on this capacitive touch control plate, comprises judging that this two waveform phase is phase-lead or phase lag.
13. detection method as claimed in claim 10 is characterized in that, wherein the 4th quantity comprises one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101031395A CN100368975C (en) | 2004-12-31 | 2004-12-31 | Capacitance type touch panel and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101031395A CN100368975C (en) | 2004-12-31 | 2004-12-31 | Capacitance type touch panel and detection method thereof |
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| CN1801069A CN1801069A (en) | 2006-07-12 |
| CN100368975C true CN100368975C (en) | 2008-02-13 |
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| CNB2004101031395A Expired - Fee Related CN100368975C (en) | 2004-12-31 | 2004-12-31 | Capacitance type touch panel and detection method thereof |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5216495B2 (en) * | 2008-09-16 | 2013-06-19 | 株式会社ジャパンディスプレイウェスト | Contact detection device and display device |
| CN102566841B (en) * | 2008-10-31 | 2015-04-15 | 宸美（厦门）光电有限公司 | Structure of curved capacitive touch control panel |
| CN101488068B (en) * | 2009-02-13 | 2012-05-09 | 苏州达方电子有限公司 | Touch control apparatus and its touch control method |
| CN101866248B (en) * | 2009-04-16 | 2012-07-04 | 义隆电子股份有限公司 | Two-layer circuit board structure for capacitive touch pad and manufacturing method thereof |
| CN101661359B (en) * | 2009-10-10 | 2011-06-01 | 友达光电股份有限公司 | Capacitance type touch detection system and detection signal-receiving and waveform-shaping module thereof |
| CN102636718B (en) * | 2012-05-10 | 2014-08-20 | 意力(广州)电子科技有限公司 | Mutual capacitance touch screen detection method |
| CN108693986A (en) * | 2018-07-11 | 2018-10-23 | 歌尔科技有限公司 | A kind of touch plate response method, system and a kind of touch tablet and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0997132A (en) * | 1995-09-29 | 1997-04-08 | Hosiden Corp | Touch type coordinate input device |
| EP0932117A2 (en) * | 1998-01-22 | 1999-07-28 | STMicroelectronics, Inc. | Touchpad providing screen cursor/pointer movement control |
| US6326564B1 (en) * | 1994-12-20 | 2001-12-04 | Hosiden Corporation | Sensitive coordinate input device |
| CN1501317A (en) * | 2002-11-14 | 2004-06-02 | Lg.������Lcd����˾ | Universal slot for accommodating various types of flash memory cards |
| GB2401181A (en) * | 2002-02-06 | 2004-11-03 | Soundtouch Ltd | Touch pad |
-
2004
- 2004-12-31 CN CNB2004101031395A patent/CN100368975C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6326564B1 (en) * | 1994-12-20 | 2001-12-04 | Hosiden Corporation | Sensitive coordinate input device |
| JPH0997132A (en) * | 1995-09-29 | 1997-04-08 | Hosiden Corp | Touch type coordinate input device |
| EP0932117A2 (en) * | 1998-01-22 | 1999-07-28 | STMicroelectronics, Inc. | Touchpad providing screen cursor/pointer movement control |
| GB2401181A (en) * | 2002-02-06 | 2004-11-03 | Soundtouch Ltd | Touch pad |
| CN1501317A (en) * | 2002-11-14 | 2004-06-02 | Lg.������Lcd����˾ | Universal slot for accommodating various types of flash memory cards |
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| CN1801069A (en) | 2006-07-12 |
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