CN104345911A - Touch pen - Google Patents
Touch pen Download PDFInfo
- Publication number
- CN104345911A CN104345911A CN201310316616.5A CN201310316616A CN104345911A CN 104345911 A CN104345911 A CN 104345911A CN 201310316616 A CN201310316616 A CN 201310316616A CN 104345911 A CN104345911 A CN 104345911A
- Authority
- CN
- China
- Prior art keywords
- signal
- electrode
- pointer
- touch
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides a touch pen. The touch pen comprises a power source circuit, a signal receiving electrode, a noise sensing electrode, a phase reversal amplifying circuit and a signal emitting electrode; the power source circuit provides working pressure for the touch pen; the signal receiving electrode receives at least a surface signal of the touch sending electrode structure of a capacitor type control device; the noise sensing electrode receives at least one environmental noise signal; the phase reversal amplifying circuit oppositely amplifies a difference value between the surface signal and the environmental noise signal to generate an opposite amplifying signal; the signal emitting electrode emits the opposite amplifying signal to attenuate a detection signal of a touch pen position in touch with a touch device. The touch pen can effectively reduce a pen point to enable accurate operation to be performed on the capacitor type control device, achieves a purpose of filtering environmental noise due to the noise sensing electrode which senses the environmental signal, saves costs and reduces stray capacitance generated by an isolation conducting layer or an isolation electrode.
Description
Technical field
The present invention about a kind of pointer, particularly a kind of pointer for capacitive touch device.
Background technology
Figure 1A and Figure 1B shows the schematic diagram of the finger touch position design on existing Detection capacitance formula contactor control device 100.For example, each Y-axis electrode 102 sequentially can send potential pulse, and by detecting the electric charge that each X-axis electrode 104 produces because of induction.Finger capacitance can be produced and because of human body grounding at the touch location of finger 106, the relative non-tactile position of pulse signal being transmitted to X-axis electrode 104 so can be made to weaken, therefore can detect which X-axis electrode 104 is touched by finger 106, and then calculate finger touch position coordinate.Moreover because be sequentially apply potential pulse to each Y-axis electrode 102 in this example, even if so finger 106 touches multiple position at one time, also can correctly judge touch location.
As shown in Figure 2, an existing pointer 200 comprises signal-receiving electrode 202, signal emitting electrode 204, conductive isolation layer 206, power circuit 208 and a see-saw circuit 210.Power circuit 208 provides pointer 200 1 operating voltage, and signal-receiving electrode 202, in the mode such as responded to, receives at least one surface signal of touch-control sensing electrode structure (not shown).In order to avoid signal-receiving electrode 202 and signal emitting electrode 204 are interfering with each other, usually conductive isolation layer 206 can be set between signal-receiving electrode 202 and signal emitting electrode 204.But, as shown in Figure 3, conductive isolation layer 206 is set and can makes between signal-receiving electrode 202 and number emitting electrode 204, to increase unnecessary stray capacitance 212, cause distorted signals to be difficult to control.
Summary of the invention
The invention provides a kind of pointer that can be used for capacitive touch device, to solve the problem of the distorted signals caused because conductive isolation layer produces stray capacitance existed in prior art.
According to the design of one embodiment of the invention, a kind of pointer comprises a power circuit, a signal-receiving electrode, noise sensing (noise-sensing) electrode, a see-saw circuit and a signal emitting electrode.Power circuit provides pointer one operating voltage, and signal-receiving electrode receives at least one surface signal of a touch-control sensing (touch-sensing) electrode structure of a capacitive touch device.Noise sensing electrode receives at least one ambient noise signal, and see-saw circuit oppositely amplifies the difference of surface signal and ambient noise signal to produce a reverse amplifying signal.Reverse amplifying signal launched by signal emitting electrode, with the detection signal of capacitive touch device in the touch position of pointer of decaying.
In an embodiment, the signal enlargement ratio of see-saw circuit is 50 to 500 times.
In an embodiment, an insulator is situated between and is located between signal-receiving electrode and signal emitting electrode and between noise sensing electrode and signal emitting electrode, and insulator can have cylindrical profile.
In an embodiment, signal-receiving electrode and noise sensing electrode all can be a becket or a conductive coil.
In an embodiment, signal emitting electrode comprises an antenna structure and an electrode cabling, and pointer more comprises a conductive rubber of coated antenna structure, and conductive rubber can be formed and at least onely leads fillet.
In an embodiment, touch-control sensing electrode structure comprises multiple first electrode tandem and multiple second electrode tandem, and the first electrode tandem receives at least one sweep signal and the second electrode tandem receives detection signal.
In an embodiment, see-saw circuit comprises an operational amplifier, and see-saw circuit has an input anode, input negative terminal and an output terminal, and input anode connects noise sensing electrode, input negative terminal connection signal receiving electrode, and output terminal connection signal emitting electrode.The output valve of the output terminal of see-saw circuit, equals to input the gain that difference that the input value of anode deducts the input value gained of input negative terminal is multiplied by operational amplifier again.
By the design of above-described embodiment, only need the surface signal utilizing a small amount of line of electric force to produce, and the detection signal of capacitive touch device of being decayed by the surface signal oppositely amplified, can carry out follow-up touch position to judge, pointer like this can effectively reduce nib and can operate accurately on capacitive touch device.Moreover, utilize the noise sensing electrode that induced environment signal is set, and pass through the differential wave process of the see-saw circuit of rear end, the object of filtering neighbourhood noise can be reached, therefore the effect not needing to arrange isolate conductive layers or isolated electrode can be obtained, except escapable cost, and the stray capacitance produced because of isolate conductive layers or isolated electrode can be reduced.
Other objects of the present invention and advantage can be further understood from the technical characteristic disclosed by the present invention.For above and other object of the present invention, feature and advantage can be become apparent, special embodiment below also coordinates institute's accompanying drawings, is described in detail below.
Accompanying drawing explanation
Figure 1A and Figure 1B shows the design diagram of the finger touch position on existing Detection capacitance formula contactor control device;
Fig. 2 is the schematic diagram of the existing pointer for capacitive touch device;
Fig. 3 illustrates the schematic diagram because of conductive isolation layer generation stray capacitance;
Fig. 4 is the schematic diagram of the pointer for capacitive touch device of one embodiment of the invention;
Fig. 5 is the calcspar of the function mode that pointer is described;
Fig. 6 is the circuit diagram of the see-saw circuit of one embodiment of the invention;
Fig. 7 is the schematic diagram of the pointer for capacitive touch device of another embodiment of the present invention;
Fig. 8 is the schematic diagram of the pointer for capacitive touch device of another embodiment of the present invention.
Reference numeral
10,60,70 pointer
12,62 signal-receiving electrodes
14,64 signal emitting electrodes
64a antenna structure
64b electrode cabling
16 power circuits
18 see-saw circuits
20 capacitive touch devices
20a touch-control sensing electrode structure
22,72 noise sensing electrodes
32 operational amplifiers
74 insulators
76 conductive rubbers
76a leads fillet
102 Y-axis electrodes
104 X-axis electrodes
106 fingers
200 pointer
202 signal-receiving electrodes
204 signal emitting electrodes
206 conductive isolation layer
208 power circuits
210 see-saw circuits
212 stray capacitances
M first electrode tandem
N second electrode tandem
P surface signal
The reverse amplifying signal of Q
S ambient noise signal
V
iN1input anode
V
iN2input negative terminal
V
oUToutput terminal
Embodiment
Aforementioned and other technology contents, feature and effect for the present invention, in the detailed description of following cooperation with reference to graphic embodiment, can clearly present.The direction term mentioned in following examples such as: upper and lower, left and right, front or rear etc., is only the direction with reference to annexed drawings.Therefore, the direction term of use is used to illustrate and is not used for limiting the present invention.
Fig. 4 is the schematic diagram of the pointer for capacitive touch device according to one embodiment of the invention, and Fig. 5 is the calcspar of the function mode that pointer is described.Please also refer to Fig. 4 and Fig. 5, pointer 10 comprises signal-receiving electrode 12, signal emitting electrode 14, power circuit 16, see-saw circuit 18 and a noise sensing electrode 22.Power circuit 16 provides pointer 10 1 operating voltage, and signal-receiving electrode 12, in the mode such as responded to, receives at least one surface signal P of the touch-control sensing electrode structure 20a of capacitive touch device 20.Touch-control sensing electrode structure 20a for example can comprise multiple first electrode tandem M and multiple second electrode tandem N, in an embodiment, multiple first electrode tandem M can receive at least one sweep signal and be actuated to scanning touch-control sensing electrode structure 20a by road, second electrode tandem N receives at least one detection signal, senses because touch action responds to the coupling capacitance generated to drive in sweep signal during the first electrode tandem M.In an embodiment, surface signal P is the signal produced by the line of electric force between touch-control sensing electrode structure 20a (M) and signal-receiving electrode 12, detection signal is the signal produced by the line of electric force between touch-control sensing electrode structure 20a (N) and signal emitting electrode 14, and noise sensing electrode 22 can receive at least one ambient noise signal S.See-saw circuit 18 launches reverse amplifying signal Q by signal emitting electrode 14 after oppositely being amplified by the surface signal P after filtering noise.Reverse amplifying signal Q can decay the detection signal of capacitive touch device 20, and the detection signal so in pointer 10 touch position can weaken the detection signal of relatively non-touch position, the practical touch position of pointer 10 therefore can be detected.Fig. 6 is the circuit diagram of the see-saw circuit 18 of one embodiment of the invention, the filtering noise of one embodiment of the invention is described and the process of reverse amplifying signal as follows with Fig. 6.The structure of see-saw circuit 18 of the present invention does not limit, such as, can utilize and have relative linear gain and export and can be implemented by an operational amplifier (OPA) 32 of input control.In the present embodiment, the input anode V of see-saw circuit 18
iN1connect noise sensing electrode 22, input negative terminal V
iN2connection signal receiving electrode 12, and output terminal V
oUTconnection signal emitting electrode 14, therefore inputs anode V
iN1the coupled signal of ambient noise signal S and transmission electrode can be fed into, input negative terminal V
iN2the coupled signal of surface signal P (comprising actual touch sense signals value and ambient noise signal value) and transmission electrode can be fed into, the therefore output terminal V of see-saw circuit 18
oUToutput valve, be input anode V
iN1input value deduct input negative terminal V
iN2the difference of input value gained be multiplied by the gain of operational amplifier 32, therefore output terminal V again
oUToutput valve can obtain the effect of oppositely amplifying and the neighbourhood noise value of surface signal P is deducted, therefore output terminal V
oUToutput be the reverse amplifying signal Q of filtering environmental noise figure.
By the design of above-described embodiment, only need the surface signal P utilizing a small amount of line of electric force to produce, and the detection signal of capacitive touch device 20 of being decayed by the surface signal P oppositely amplified, can carry out follow-up touch position to judge, pointer 10 like this can effectively reduce nib and can operate accurately on capacitive touch device 20.Moreover, utilize the noise sensing electrode 22 that induced environment signal is set, and pass through the differential wave process of the see-saw circuit 18 of rear end, the object of filtering neighbourhood noise can be reached, therefore the effect not needing to arrange isolate conductive layers or isolated electrode can be obtained, except escapable cost, and the stray capacitance produced because of isolate conductive layers or isolated electrode can be reduced.
Fig. 7 is the schematic diagram of the pointer for capacitive touch device of one embodiment of the invention.As shown in Figure 7, the signal-receiving electrode 62 of pointer 60 and noise sensing electrode 72 such as can be two beckets being spaced a distance and arranging.Signal emitting electrode 64 can comprise an an antenna structure 64a and electrode cabling 64b.One insulator 74 is situated between and is located between signal emitting electrode 64 and two beckets (signal-receiving electrode 62, noise sensing electrode 72), to avoid issuable short circuit or problem of signal attenuation.In an embodiment, insulator 74 has cylindrical profile, and be arranged between signal-receiving electrode 62 and signal emitting electrode 64, and between noise sensing electrode 72 and signal emitting electrode 64, in order to each other electrical between blocking signal receiving electrode 62, signal emitting electrode 64 and noise sensing electrode 72 three.In the present embodiment, one conductive rubber 76 can the antenna structure 64a of coated signal emitting electrode 64, to avoid pointer 60 scratch contact panel (not shown) in time using, in addition conductive rubber 76 can be formed at least one fillet 76a that leads and make pointer 60 be easy to the different writing postures of collocation user.In addition, by the design of the present embodiment, because the height of antenna structure 64a and surface area increase, therefore the diameter of antenna structure 64a (nib) can be reduced, improve the fineness of pointer 60 in use and comfort level.As shown in Figure 8, in another embodiment, the signal-receiving electrode 62 of pointer 70 and noise sensing electrode 72 also can be conductive coil and formed.
Should be noted that each embodiment of the present invention can utilize mutual tolerance formula or self-tolerant touch-control sensing mode to obtain touch position.In addition, utilize sine wave to represent surface signal in diagram and transmit be only illustrate and do not limit, surface signal and the forms such as there is square wave, pulse wave, triangular wave or oblique wave after treatment that transmit, all can reach similar effect.Moreover the enlargement ratio of reverse amplifying signal does not limit, such as, can be 50-500 doubly, and the structure of visual capacitive touch device, drive IC type, touch control pen structure etc. determine suitable enlargement ratio.
Only as described above, be only preferred embodiment of the present invention, when not limiting scope of the invention process with this, the simple equivalence namely generally done according to claims of the present invention and invention description content changes and modifies, and all still remains within the scope of the patent.Any embodiment of the present invention or claims must not reach whole object disclosed by the present invention or advantage or feature in addition.In addition, summary part and title are only used to the use of auxiliary patent document search, are not used for limiting interest field of the present invention.
Claims (12)
1. a pointer, is characterized in that, described pointer comprises:
One power circuit, provides described pointer one operating voltage;
One signal-receiving electrode, receives at least one surface signal of a touch-control sensing electrode structure of a capacitive touch device;
One noise sensing electrode, receives at least one ambient noise signal;
One see-saw circuit, oppositely amplifies the difference of described surface signal and described ambient noise signal to produce a reverse amplifying signal; And
One signal emitting electrode, launches described reverse amplifying signal, with the detection signal of described capacitive touch device in the touch position of described pointer of decaying.
2. pointer according to claim 1, is characterized in that, the signal enlargement ratio of described see-saw circuit is 50 to 500 times.
3. pointer according to claim 1, is characterized in that, described pointer more comprises:
One insulator, be situated between and be located between described signal-receiving electrode and described signal emitting electrode and between described noise sensing electrode and described signal emitting electrode, make to be electrically insulated each other between described signal-receiving electrode, described signal emitting electrode and described noise sensing electrode three.
4. pointer according to claim 3, is characterized in that, described insulator has cylindrical profile.
5. pointer according to claim 1, is characterized in that, described signal-receiving electrode is a becket or a conductive coil.
6. pointer according to claim 1, is characterized in that, described noise sensing electrode is a becket or a conductive coil.
7. pointer according to claim 1, is characterized in that, described signal emitting electrode comprises an antenna structure and an electrode cabling, and described pointer more comprises a conductive rubber of coated described antenna structure.
8. pointer according to claim 7, is characterized in that, described conductive rubber is formed at least onely leads fillet.
9. pointer according to claim 1, it is characterized in that, described touch-control sensing electrode structure comprises multiple first electrode tandem and multiple second electrode tandem, and described multiple first electrode tandem receives at least one sweep signal and described multiple second electrode tandem receives described detection signal.
10. pointer according to claim 1, is characterized in that, described see-saw circuit comprises an operational amplifier.
11. pointer according to claim 10, it is characterized in that, described see-saw circuit has an input anode, input negative terminal and an output terminal, described input anode connects described noise sensing electrode, described input negative terminal connects described signal-receiving electrode, and described output terminal connects described signal emitting electrode.
12. pointer according to claim 11, it is characterized in that, the output valve of the output terminal of described see-saw circuit, the difference that the input value equaling described input anode deducts the input value gained of described input negative terminal is multiplied by the gain of described operational amplifier again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316616.5A CN104345911A (en) | 2013-07-25 | 2013-07-25 | Touch pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316616.5A CN104345911A (en) | 2013-07-25 | 2013-07-25 | Touch pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104345911A true CN104345911A (en) | 2015-02-11 |
Family
ID=52501712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310316616.5A Pending CN104345911A (en) | 2013-07-25 | 2013-07-25 | Touch pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104345911A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110347272A (en) * | 2019-07-11 | 2019-10-18 | 汉王科技股份有限公司 | Capacitance pen and its manufacturing method |
| CN114661175A (en) * | 2022-03-22 | 2022-06-24 | 荣耀终端有限公司 | Touch control pen and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5905489A (en) * | 1996-02-16 | 1999-05-18 | Sharp Kabushiki Kaisha | Coordinate input device |
| CN1234895A (en) * | 1995-06-07 | 1999-11-10 | 安德烈电子公司 | Noise cancellation and noise reduction apparatus |
| CN102681691A (en) * | 2011-03-02 | 2012-09-19 | 胜华科技股份有限公司 | Touch control pen |
| CN103135840A (en) * | 2011-12-05 | 2013-06-05 | 乐金显示有限公司 | Touch screen sensing device and method for sensing touch screen |
-
2013
- 2013-07-25 CN CN201310316616.5A patent/CN104345911A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1234895A (en) * | 1995-06-07 | 1999-11-10 | 安德烈电子公司 | Noise cancellation and noise reduction apparatus |
| US5905489A (en) * | 1996-02-16 | 1999-05-18 | Sharp Kabushiki Kaisha | Coordinate input device |
| CN102681691A (en) * | 2011-03-02 | 2012-09-19 | 胜华科技股份有限公司 | Touch control pen |
| CN103135840A (en) * | 2011-12-05 | 2013-06-05 | 乐金显示有限公司 | Touch screen sensing device and method for sensing touch screen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110347272A (en) * | 2019-07-11 | 2019-10-18 | 汉王科技股份有限公司 | Capacitance pen and its manufacturing method |
| CN114661175A (en) * | 2022-03-22 | 2022-06-24 | 荣耀终端有限公司 | Touch control pen and electronic equipment |
| CN114661175B (en) * | 2022-03-22 | 2023-08-18 | 荣耀终端有限公司 | Touch pen and electronic equipment |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |