CN102364412A - Circuit structure of capacitive touch control pen - Google Patents
Circuit structure of capacitive touch control pen Download PDFInfo
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- CN102364412A CN102364412A CN201110329302XA CN201110329302A CN102364412A CN 102364412 A CN102364412 A CN 102364412A CN 201110329302X A CN201110329302X A CN 201110329302XA CN 201110329302 A CN201110329302 A CN 201110329302A CN 102364412 A CN102364412 A CN 102364412A
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- circuit
- circuit structure
- electric capacity
- touch control
- pen
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Abstract
The invention relates to a circuit structure of a capacitive touch control pen. The touch control pen comprises a pen head and a pen body, wherein a conducting wire is introduced from the pen body and is connected with a touch control screen through a circuit board. When the touch control pen operates on the touch control screen, the circuit structure mainly comprises a scanning end circuit and a reference end circuit, and a negative pulse voltage is loaded on the scanning end circuit of the touch control pen. For the circuit structure provided by the invention, the touch control pen is connected with the touch control screen through the conducting wire and the circuit board and is simple and convenient to operate. No matter how big or how small the pen point of the touch control pen is, the touch control pen can operate smoothly on the touch control screen.
Description
Technical field
the present invention relates to the circuit structure of pointer, refer in particular to the circuit structure of capacitance touching control pen.
Background technology
are accompanied by the high performance and the diversified development of various electronic equipments such as mobile phone and touch navigation system in recent years, and the electronic equipment that the touch screen of light transmission is installed in the front of displays such as liquid crystal progressively increases.The user of such electronic equipment on one side carries out visual confirmation to the displaying contents of the display device that is positioned at the touch screen back side through touch screen, utilize modes such as finger or pointer push touch screen to operate on one side.Various functions that thus can operating electronic equipment.
are different according to the principle of work of touch screen and transmission medium, and existing touch screen is divided into four types, is respectively resistance-type, condenser type, infrared-type and surface acoustic wave type.Wherein capacitance type touch control screen is because of less use comparatively extensive of higher, the required touching dynamics of sensitivity.
existing capacitance type touch control screen comprises a transparency conducting layer, and this transparency conducting layer is connected with a plurality of electrodes.During use; Usually adopt the surface of a finger or a pointer touch capacitance plate; Form a hand capacity between touch objects and the transparency conducting layer; Electric signal between each electrode of transparency conducting layer through external circuitry sensing touch point and touch screen surface, thus can judge the position of touch points on touch screen.
are because in order to obtain better electric conductivity; The nib of pointer is generally processed by metal material, but nib is generally thinner, so when pointer is operated on said touch screen; The capacitance variations that forms between pointer and the touch screen just can not be fairly obvious; During concrete operations, the result that when pointer is rule on touch screen, just possibly occur breaking causes influencing the sensitivity of operation touch screen thus; So we need provide a kind of circuit structure of simple capacitance touching control pen for users, it can carry out various operations easily on touch screen.
Summary of the invention
The actual technical matters to be solved of
the present invention is the circuit structure how a kind of brand-new capacitance touching control pen is provided; Both solve the electric capacity problem of smaller that pointer produces with touch screen in use, strengthened the sensitivity of operation touch screen again.
are in order to realize above-mentioned purpose of the present invention; The invention provides a kind of circuit structure of capacitance touching control pen; Said pointer comprises a nib and a body, and said body drawn a lead and be connected on the touch screen through circuit board, when said pointer is worked on said touch screen; Its circuit structure mainly comprises scanning terminal circuit and reference edge circuit, and the capacitive load of pointer has a negative pulse voltage on the said scanning terminal circuit.
The circuit structure of
capacitance touching control pen of the present invention; Said pointer is connected on the touch screen through circuit board through lead; Comparatively easy during operation, regardless of the nib size of pointer, can both be on touch screen smooth operation; Moreover circuit structure according to the invention is simple, has strengthened the sensitivity of operation touch screen.
Description of drawings
Fig. 1 is the synoptic diagram that is connected according to pointer according to the invention and touch screen.
Fig. 2 is the circuit structure diagram during according to pointer according to the invention work.
Embodiment
are further described the present invention below in conjunction with accompanying drawing and embodiment.
please refer to shown in Figure 1; Capacitance touching control pen 1 of the present invention comprises a nib 11 and a body 12; Said body 12 drawn a lead 2 and is connected on the touch screen 3 through circuit board 4, and wherein said touch screen 3 and circuit board 4 are connected through lead.When said pointer 1 was worked on said touch screen 3, its circuit structure mainly comprised scanning terminal circuit S and reference edge circuit R.The equal ground connection of an end of wherein said scanning terminal circuit S and reference edge circuit R, it is V that the other end is connected to the positive pulse end
L
On the end.Said positive pulse V
L
End is composed in parallel with C2 by capacitor C 1, and capacitor C 1 connects reference edge circuit R, capacitor C 2 connection scanning terminal circuit S, said V
L
End is used for to the electric capacity of scanning terminal circuit S and the electric capacity among the reference edge circuit R charging being provided, and said positive pulse end V
L
It is the inner positive pulse that produces of IC.
The capacitor C 3 that said reference edge circuit R one end connects two parallel connections arrives ground with C5, and it is V to the positive pulse end that the other end connects capacitor C 1
L
End.The capacitor C 4 that said scanning terminal circuit S one end connects two parallel connections is to ground and the C6 negative pulse voltage V that connects
Pen
To ground, it is V to the positive pulse end that the other end connects capacitor C 2
L
End.
Because in reference edge circuit R, capacitor C 5 is the inner adjustable electric capacity of IC, and in scanning terminal circuit S, voltage V
Pen
It is the negative pulse of external load.Under the situation of not considering capacitor C 5 and C6, according to the circuit rule, the appearance value of design capacitance C1, C2, C3 and C4 can reach reference edge circuit R and the electric quantity balancing that scans terminal circuit S, is formulated as follows: Q
R
=Q
S
When the said touch screen 3 of pointer 1 touching,, need satisfy formula: V in order to continue to keep the electric quantity balancing of reference edge circuit R and scanning terminal circuit S
RG
* C5=(V
SG
-(V
Pen
)) * C6.
Because said pointer 1 nib is less, so the capacitor C 6 that itself and touch screen 3 are produced is far smaller than adjustable condenser C5 on the reference circuit end, and voltage V among the said scanning terminal circuit S
Pen
Be the negative pulse of external load, so voltage V
SG
With V
Pen
Difference be one on the occasion of.So under the condition that guarantees said capacitance touching control pen 1 circuit balancing, said scanning terminal circuit S goes up voltage V
SG
With V
Pen
Difference just be far longer than the voltage V on the reference edge circuit R
RG
So, even pointer 1 is less with the capacitor C 6 that touch screen 3 produces, because external load negative pulse V
Pen
Effect, also can guarantee to scan the balance of voltage of terminal circuit S and reference edge circuit R.
The circuit structure of
capacitance touching control pen of the present invention, not only simple, and overcome because the less shortcoming that causes sensitivity to be lowered of pointer electric capacity on said touch screen; Moreover, even the nib of pointer is less, realize the smooth operation of capacitance touching control pen on said touch screen too.
Claims (9)
1. the circuit structure of a capacitance touching control pen; Said pointer comprises a nib and a body; Said body drawn a lead and is connected on the touch screen through circuit board; When said pointer was worked on said touch screen, its circuit structure mainly comprised scanning terminal circuit and reference edge circuit, and it is characterized in that: pointer is loaded with a negative pulse voltage on the said scanning terminal circuit.
2. circuit structure as claimed in claim 1 is characterized in that: the equal ground connection of an end of said scanning terminal circuit and reference edge circuit, the other end is connected to the positive pulse end.
3. circuit structure as claimed in claim 1 is characterized in that: said reference edge circuit one end connects the electric capacity of two parallel connections to ground, and the other end connects an electric capacity to the positive pulse end.
4. circuit structure as claimed in claim 3 is characterized in that: said reference edge circuit one end connects the electric capacity of two parallel connections, and one of them electric capacity is the inner adjustable electric capacity of IC.
5. circuit structure as claimed in claim 1 is characterized in that: the electric capacity that said scanning terminal circuit one end connects two parallel connections arrives ground to ground and another capacitances in series one negative pulse voltage, and the other end connects another electric capacity to the positive pulse end.
6. circuit structure as claimed in claim 5 is characterized in that: in the said scanning terminal circuit, negative pulse voltage is the negative pulse of external load.
7. circuit structure as claimed in claim 5 is characterized in that: said another electric capacity that is in series with negative pulse voltage is meant the electric capacity that said pointer is produced when on touch screen, operating.
8. like claim 2 or 3 or 5 described circuit structures, it is characterized in that: said positive pulse end is the inner positive pulse that produces of IC.
9. circuit structure as claimed in claim 1 is characterized in that: said touch screen is connected through lead with circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110329302.XA CN102364412B (en) | 2011-10-26 | 2011-10-26 | Circuit structure of capacitive touch control pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110329302.XA CN102364412B (en) | 2011-10-26 | 2011-10-26 | Circuit structure of capacitive touch control pen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102364412A true CN102364412A (en) | 2012-02-29 |
| CN102364412B CN102364412B (en) | 2014-03-12 |
Family
ID=45690979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110329302.XA Active CN102364412B (en) | 2011-10-26 | 2011-10-26 | Circuit structure of capacitive touch control pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102364412B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1894737A (en) * | 2003-09-12 | 2007-01-10 | 西奎公司 | Tethered stylyus for use with a capacitance-sensitive touchpad |
| US7612767B1 (en) * | 2005-08-24 | 2009-11-03 | Griffin Technology, Inc. | Trackpad pen for use with computer touchpad |
| CN101788858A (en) * | 2009-01-22 | 2010-07-28 | 义隆电子股份有限公司 | Contact detection method of capacitive touchpad and stylus thereof |
| CN101796423A (en) * | 2007-05-08 | 2010-08-04 | 新思公司 | Production testing of a capacitive touch sensing device |
-
2011
- 2011-10-26 CN CN201110329302.XA patent/CN102364412B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1894737A (en) * | 2003-09-12 | 2007-01-10 | 西奎公司 | Tethered stylyus for use with a capacitance-sensitive touchpad |
| US7612767B1 (en) * | 2005-08-24 | 2009-11-03 | Griffin Technology, Inc. | Trackpad pen for use with computer touchpad |
| CN101796423A (en) * | 2007-05-08 | 2010-08-04 | 新思公司 | Production testing of a capacitive touch sensing device |
| CN101788858A (en) * | 2009-01-22 | 2010-07-28 | 义隆电子股份有限公司 | Contact detection method of capacitive touchpad and stylus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102364412B (en) | 2014-03-12 |
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