CN102968196B - A kind of wireless signal transmission method of capacitance pen system - Google Patents
A kind of wireless signal transmission method of capacitance pen system Download PDFInfo
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- CN102968196B CN102968196B CN201210495785.5A CN201210495785A CN102968196B CN 102968196 B CN102968196 B CN 102968196B CN 201210495785 A CN201210495785 A CN 201210495785A CN 102968196 B CN102968196 B CN 102968196B
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Abstract
The invention discloses a kind of wireless signal transmission method of capacitance pen system, described capacitance pen system comprises a capacitance plate and and has nib, is built-in with the capacitance pen of control chip, and first, described capacitance plate and capacitance pen set identical lock in time; Secondly, described capacitance plate sends scanning drive signal, carries out N scanning to the position of described capacitance pen on described capacitance plate; Finally, the described capacitance pen described scanning drive signal that sends to the data processing of capacitance plate to receive as required.By said method, capacitance pen of the present invention is without the need to by extraneous transmission medium, and adopt the signal return that software scenario can realize described capacitance plate, cost is low, easily realizes.
Description
Technical field
The present invention relates to a kind of wireless signal transmission method, particularly relate to a kind of wireless signal transmission method of capacitance pen system.
Background technology
After touch control screen is applied to various electronic product, the pointer of corresponding electronic product is also arisen at the historic moment, current commonly capacitance type touch control screen and the capacitance pen supporting with it, multi-signal transmission mode is had between capacitance pen and capacitance plate, but transmitted by a kind of communication media all nothing more than, conventional mode has two kinds, a kind of is the transmission mode of wired capacitance pen, capacitance plate sends signal by a connecting line to capacitance pen, then capacitance pen passes through another root connecting line to capacitance plate return path signal, and the length of connecting line often limits the use of user, inconvenience is brought to user, another kind is the transmission mode of wireless capacitance pen, wireless signal is passed mutually by increasing infrared, bluetooth sending and receiving device between capacitance plate and capacitance pen, but the restricted problem of the angular dimension using the wireless signals such as infrared, bluetooth often to have signal to send and receive, distance length, occur unavoidably reacting insensitive problem, too increase hardware cost simultaneously.
Therefore need badly and provide a kind of novel wireless signal transmission method to solve the problems referred to above.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of wireless signal transmission method of capacitance pen system, without the need to realizing Signal transmissions by extraneous transmission medium.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the wireless signal transmission method providing a kind of capacitance pen system, described capacitance pen system comprises a capacitance plate and and has nib, is built-in with the capacitance pen of the control chip comprising one general purpose I/O port, and described method comprises:
First, described capacitance plate and capacitance pen set identical lock in time;
Secondly, described capacitance plate sends scanning drive signal, carries out N scanning to the position of described capacitance pen on capacitance plate;
If described capacitance pen needs to send a kind of data bit, described control chip receives scanning drive signal and transfers to described nib, and described capacitance plate obtains this kind of data bit; If described capacitance pen needs to send another kind of data bit, then stop and receive scanning drive signal, described capacitance plate obtains this another kind of data bit, finally completes the transmission of N bit data.
The invention has the beneficial effects as follows: capacitance pen of the present invention is without the need to by extraneous transmission medium, and adopt the signal return that software scenario can realize described capacitance plate, cost is low, easily realizes.
Accompanying drawing explanation
Fig. 1 is the waveform schematic diagram of the Signal transmissions of technical solution of the present invention.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1, the embodiment of the present invention comprises:
A kind of capacitance pen system, comprise a capacitance plate and there is nib, be built-in with the capacitance pen of control chip, described control chip has one general purpose I/O port, transmitted the scanning drive signal extremely described nib sent by described capacitance plate by this general purpose I/O port, thus make described capacitance plate obtain the signal of described capacitance pen passback.Lower mask body discusses the wireless signal transmission method of described capacitance pen system.
First, described capacitance plate and capacitance pen set identical lock in time, comprise described lock in time and wait for that capacitance pen prepares to receive the time t0 of scanning drive signal and the time t1 of a data transmission.Refer to Fig. 1, oscillogram is above the oscillogram that described capacitance plate sends scanning drive signal, and oscillogram is below the signal waveforms that described capacitance pen nib place needs passback.First described capacitance plate sends a command signal to described capacitance pen, after described capacitance pen receives this command signal, enter the preparatory stage of the scanning drive signal receiving described capacitance plate, the time period that counting clock sends scanning drive signal to described capacitance plate from this moment is defined as t0; The timing definition that described capacitance plate transmits a data is t1, transmitting time of data is complete scan period, this scan period can comprise a scanning drive signal, also can comprise several scanning drive signal, determines according to the scanning drive chip of described capacitance plate.The time t1 transmitting a data shown in Fig. 1 comprises four scanning drive signal.As can be seen from Figure 1, described capacitance plate is identical respectively with t0 with t1 of capacitance pen, only has the time synchronized of described capacitance plate and capacitance pen, and capacitance pen described in guarantee is accurate obtains return data.
After described capacitance pen contacts with capacitance plate, when described capacitance plate has scanned the position of described capacitance pen on capacitance plate, described capacitance plate has started to send scanning drive signal, carries out N scanning to the position of described capacitance pen on capacitance plate.Described N value depends on that described capacitance pen needs to send to the figure place of the data of capacitance plate.If described capacitance plate needs reception N bit data and capacitance pen to send to capacitance plate N bit data, then described capacitance plate carries out N scanning to the position of described capacitance pen on capacitance plate, obtains N number of measurement result, thus obtains the data of a N position.The number sending scanning drive signal when described capacitance plate scans at every turn is determined by the scanning drive chip of described capacitance plate.
In each scanning process, described capacitance pen sends to the scanning drive signal that described in the data processing of capacitance plate, capacitance plate sends as required.If described capacitance pen needs to send a kind of data bit, described control chip receives described scanning drive signal and transfers to described nib, and namely described capacitance plate obtains this kind of data bit; If described capacitance pen needs to send another kind of data bit, then stop and receive scanning drive signal, namely described capacitance plate obtains this another kind of data bit, finally completes the transmission of N bit data.The described mode receiving scanning drive signal that stops comprises various ways, can determine, such as, the general purpose I of described control chip/O port is set to output state according to the control chip in described capacitance pen; Described control chip forbids the signal receiving module work of described capacitance pen.For example, if described capacitance pen needs transmission 1, described control chip receives scanning drive signal and transfers to described nib, and the signal that described capacitance plate scans on nib can obtain data 1; If described capacitance pen needs transmission 0, general purpose I/O the port of described control chip is set to output state, stop and receive scanning drive signal, described nib is made to keep low level in present scan, the signal that described capacitance plate scans on nib can obtain data 0, and N number of data bit 0 or 1 can obtain the data of a N position.
The mode that described capacitance pen receives scanning drive signal is determined according to different capacitance plate system requirements, comprise wire transmission mode and wireless transmission method, and the wireless signal of described capacitance pen system refers to the signal that capacitance pen does not need extraneous any transmission medium and can return.Whole capacitance pen system employing software scenario can realize the signal return to described capacitance plate, and the I/O resource taking capacitance pen control chip is few, and easily realize, cost is low.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. the wireless signal transmission method of a capacitance pen system, described capacitance pen system comprises a capacitance plate and a capacitance pen, described capacitance pen has nib, it is characterized in that: described capacitance pen is built-in with the control chip comprising one general purpose I/O port, and described method comprises:
First, described capacitance plate and capacitance pen set identical lock in time;
Secondly, described capacitance plate sends scanning drive signal, carries out N scanning to the position of described capacitance pen on capacitance plate;
If described capacitance pen needs to send a kind of data bit, described control chip receives scanning drive signal and transfers to described nib, and described capacitance plate obtains this kind of data bit; If described capacitance pen needs to send another kind of data bit, then stop and receive scanning drive signal, described capacitance plate obtains this another kind of data bit, finally completes the transmission of N bit data.
2. the wireless signal transmission method of capacitance pen system according to claim 1, is characterized in that, stops the mode receiving scanning drive signal to comprise and the general purpose I of described control chip/O port is set to output state.
3. the wireless signal transmission method of capacitance pen system according to claim 1, is characterized in that, comprises described lock in time and waits for that capacitance pen prepares to receive the time of scanning drive signal and the time of a data transmission.
4. the wireless signal transmission method of capacitance pen system according to claim 1, is characterized in that, it is carried out when it has scanned the position of described capacitance pen on capacitance plate that described capacitance plate sends scanning drive signal.
5. the wireless signal transmission method of capacitance pen system according to claim 1, is characterized in that, it is determined by the scanning drive chip of described capacitance plate that described capacitance plate scans the number sending scanning drive signal at every turn.
6. the wireless signal transmission method of capacitance pen system according to claim 1, is characterized in that, described N value depends on that described capacitance pen needs to send to the figure place of the data of capacitance plate.
7. the wireless signal transmission method of capacitance pen system according to claim 1, is characterized in that, described capacitance pen includes line capacitance pen and wireless capacitance pen.
8. the wireless signal transmission method of capacitance pen system according to claim 7, is characterized in that, the mode that described capacitance pen receives scanning drive signal comprises wire transmission and wireless transmission.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210495785.5A CN102968196B (en) | 2012-11-29 | 2012-11-29 | A kind of wireless signal transmission method of capacitance pen system |
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| CN201210495785.5A CN102968196B (en) | 2012-11-29 | 2012-11-29 | A kind of wireless signal transmission method of capacitance pen system |
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| CN102968196A CN102968196A (en) | 2013-03-13 |
| CN102968196B true CN102968196B (en) | 2016-01-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105468211A (en) * | 2014-08-13 | 2016-04-06 | 比亚迪股份有限公司 | Data transmission method, system and device between capacitive stylus and touch screen |
| CN111638814B (en) * | 2020-06-02 | 2023-11-10 | 深圳市汇顶科技股份有限公司 | Synchronization method, wireless communication chip, touch chip and coding chip |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005096772A3 (en) * | 2004-04-01 | 2006-04-06 | Finepoint Innovations Inc | Surface and cordless transducer system |
| CN202041915U (en) * | 2011-03-17 | 2011-11-16 | 广州视源电子科技有限公司 | Stylus |
| US8094133B2 (en) * | 2008-09-12 | 2012-01-10 | Mitsubishi Electric Corporation | Touch panel device |
| CN102736753A (en) * | 2012-06-15 | 2012-10-17 | 苏州瀚瑞微电子有限公司 | Photoelectric touch pen system |
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2012
- 2012-11-29 CN CN201210495785.5A patent/CN102968196B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005096772A3 (en) * | 2004-04-01 | 2006-04-06 | Finepoint Innovations Inc | Surface and cordless transducer system |
| US8094133B2 (en) * | 2008-09-12 | 2012-01-10 | Mitsubishi Electric Corporation | Touch panel device |
| CN202041915U (en) * | 2011-03-17 | 2011-11-16 | 广州视源电子科技有限公司 | Stylus |
| CN102736753A (en) * | 2012-06-15 | 2012-10-17 | 苏州瀚瑞微电子有限公司 | Photoelectric touch pen system |
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