CN102968196A - Wireless signal transmission method for capacitance pen system - Google Patents
Wireless signal transmission method for capacitance pen system Download PDFInfo
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- CN102968196A CN102968196A CN2012104957855A CN201210495785A CN102968196A CN 102968196 A CN102968196 A CN 102968196A CN 2012104957855 A CN2012104957855 A CN 2012104957855A CN 201210495785 A CN201210495785 A CN 201210495785A CN 102968196 A CN102968196 A CN 102968196A
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Abstract
The invention discloses a wireless signal transmission method for a capacitance pen system. The capacitance pen system comprises a capacitance screen and a capacitance pen with a pen point and a built-in control chip. The wireless signal transmission method comprises the steps as follows: firstly, the same synchronous time is set for the capacitance screen and the capacitance pen; secondly, the capacitance screen sends a scanning drive signal for scanning the position of the capacitance pen on the capacitance screen for N times; and lastly, the received scanning drive signal is processed by data sent to the capacitance screen by the capacitance pen as needed. According to the method, the capacitance pen can retransmit the signal of the capacitance screen by adopting a software scheme without assistance of an external transmission medium; and the method is low in cost and easy to realize.
Description
Technical field
The present invention relates to a kind of wireless signal transmission method, particularly relate to the wireless signal transmission method of a kind of capacitance pen system.
Background technology
Along with after touch control screen is applied to various electronic products, the pointer of corresponding electronic product is also arisen at the historic moment, commonly capacitance type touch control screen reaches the capacitance pen supporting with it at present, the multi-signal transmission mode is arranged between capacitance pen and the capacitance plate, but all transmit by a kind of communication media nothing more than, mode commonly used has two kinds, a kind of is the transmission mode of wired capacitance pen, capacitance plate passes through a connecting line to the capacitance pen transmitted signal, then capacitance pen passes through another root connecting line to the capacitance plate return path signal, and the length of connecting line has often limited user's use, brings inconvenience to the user; Another kind is the transmission mode of wireless capacitance pen, can be infrared by increasing between capacitance plate and the capacitance pen, the bluetooth sending and receiving device passes wireless signal mutually, but use the wireless signals such as infrared, bluetooth often have the angular dimension of signal sending and receiving, apart from the restricted problem of length, the unavoidable insensitive problem of reaction that occurs has also increased hardware cost simultaneously.
Therefore needing badly provides 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 provides the wireless signal transmission method of a kind of capacitance pen system, need not can realize the signal transmission 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 that a kind of capacitance pen system is provided, described capacitance pen system comprises that a capacitance plate and has nib, is built-in with the capacitance pen of the control chip that comprises one general purpose I/O port, and described method comprises:
At first, described capacitance plate is set identical lock in time with capacitance pen;
Secondly, described capacitance plate sends scanning drive signal, and N scanning is carried out in the position of described capacitance pen on capacitance plate;
If described capacitance pen need 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 data bit; If described capacitance pen need to send another kind of data bit, then stop to receive scanning drive signal, described capacitance plate obtains this another kind data bit, finally finishes the transmission of N bit data.
The invention has the beneficial effects as follows: capacitance pen of the present invention need not by extraneous transmission medium, and the employing software scenario can be realized the signal return to described capacitance plate, and cost is low, easily realizes.
Description of drawings
Fig. 1 is the waveform synoptic diagram of the signal transmission of technical solution of the present invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
See also Fig. 1, the embodiment of the invention comprises:
A kind of capacitance pen system, comprise that a capacitance plate and has nib, is built-in with the capacitance pen of control chip, described control chip has one general purpose I/O port, transmit the scanning drive signal that sent by described capacitance plate by this general purpose I/O port to described nib, thereby make described capacitance plate obtain the signal of described capacitance pen passback.Lower mask body is discussed the wireless signal transmission method of described capacitance pen system.
At first, described capacitance plate is set identical lock in time with capacitance pen, comprises described lock in time waiting for that the capacitance pen preparation receives the time t0 of scanning drive signal and the time t1 that a data transmits.See also Fig. 1, top oscillogram is the oscillogram that described capacitance plate sends scanning drive signal, and following oscillogram is the signal waveforms that described capacitance pen nib place need to return.At 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 that receives described capacitance plate, be defined as t0 from begin counting clock to the time period that described capacitance plate sends scanning drive signal this moment; The timing definition that described capacitance plate transmits a data is t1, the time of transmitting data is a complete scan period, this scan period can comprise a scanning drive signal, also can comprise several scanning drive signal, decides according to the scanning drive chip of described capacitance plate.The time t1 of transmission a data shown in Figure 1 comprises four scanning drive signal.As can be seen from Figure 1, the t0 of described capacitance plate and capacitance pen is identical respectively with t1, only has the time synchronized of described capacitance plate and capacitance pen, and the described capacitance pen of guarantee is accurate must to return data.
Described capacitance pen is with after capacitance plate contacts, and when described capacitance plate had scanned the position of described capacitance pen on capacitance plate, described capacitance plate began to send scanning drive signal, and N scanning is carried out in the position of described capacitance pen on capacitance plate.Described N value depends on that described capacitance pen need to send to the figure place of the data of capacitance plate.If it is that capacitance pen sends to capacitance plate N bit data that described capacitance plate need to receive the N bit data, then described capacitance plate carries out N scanning to the position of described capacitance pen on capacitance plate, obtains N measurement result, thereby obtains the data of a N position.The number that sends scanning drive signal when described capacitance plate scans at every turn is that the scanning drive chip by described capacitance plate determines.
In each scanning process, described capacitance pen sends to as required the data of capacitance plate and processes the scanning drive signal that described capacitance plate sends.If described capacitance pen need to send a kind of data bit, described control chip receives described scanning drive signal and transfers to described nib, and described capacitance plate namely obtains this kind data bit; If described capacitance pen need to send another kind of data bit, then stop to receive scanning drive signal, described capacitance plate namely obtains this another kind data bit, finally finishes the transmission of N bit data.The mode that described prevention receives scanning drive signal comprises various ways, can determine according to the control chip in the described capacitance pen, for example the general purpose I of described control chip/O port is set to output state; Described control chip is forbidden the signal receiving module work of described capacitance pen.For instance, if described capacitance pen need to send 1, described control chip receives scanning drive signal and transfers to described nib, and the signal that described capacitance plate scans on the nib can obtain data 1; If described capacitance pen need to send 0, the general purpose I of described control chip/O port is set to output state, stop and receive scanning drive signal, make described nib in this scanning, keep low level, the signal that described capacitance plate scans on the nib can obtain data 0, and N data bit 0 or 1 can obtain the data of a N position.
Described capacitance pen receives the mode of scanning drive signal to be decided 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 to return.Whole capacitance pen system adopts software scenario can realize signal return to described capacitance plate, and the I/O resource that takies the capacitance pen control chip is few, realizes that easily cost is low.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the 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 that a capacitance plate and has nib, is built-in with the capacitance pen of the control chip that comprises one general purpose I/O port, described method comprises:
At first, described capacitance plate is set identical lock in time with capacitance pen;
Secondly, described capacitance plate sends scanning drive signal, and N scanning is carried out in the position of described capacitance pen on capacitance plate;
If described capacitance pen need 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 data bit; If described capacitance pen need to send another kind of data bit, then stop to receive scanning drive signal, described capacitance plate obtains this another kind data bit, finally finishes the transmission of N bit data.
2. the wireless signal transmission method of capacitance pen according to claim 1 system is characterized in that, stops the mode that receives scanning drive signal to comprise the general purpose I of described control chip/O port is set to output state.
3. the wireless signal transmission method of capacitance pen according to claim 1 system is characterized in that, comprises described lock in time waiting for that capacitance pen prepares to receive the time of scanning drive signal and the time that a data transmits.
4. the wireless signal transmission method of capacitance pen according to claim 1 system is characterized in that, it is to carry 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 according to claim 1 system is characterized in that, it is that scanning drive chip by described capacitance plate determines that described capacitance plate scans the number that sends scanning drive signal at every turn.
6. the wireless signal transmission method of capacitance pen according to claim 1 system is characterized in that described N value depends on that described capacitance pen need to send to the figure place of the data of capacitance plate.
7. the wireless signal transmission method of capacitance pen according to claim 1 system is characterized in that described capacitance pen includes line capacitance pen and wireless capacitance pen.
8. the wireless signal transmission method of capacitance pen according to claim 7 system 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 true CN102968196A (en) | 2013-03-13 |
| CN102968196B CN102968196B (en) | 2016-01-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111638814A (en) * | 2020-06-02 | 2020-09-08 | 深圳市汇顶科技股份有限公司 | Synchronization method, wireless communication chip, touch control chip and coding chip |
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| WO2005096772A2 (en) * | 2004-04-01 | 2005-10-20 | 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005096772A2 (en) * | 2004-04-01 | 2005-10-20 | Finepoint Innovations, Inc. | Surface and cordless transducer system |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111638814A (en) * | 2020-06-02 | 2020-09-08 | 深圳市汇顶科技股份有限公司 | Synchronization method, wireless communication chip, touch control chip and coding chip |
| 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 |
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| CN102968196B (en) | 2016-01-27 |
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