CN112328129B - Electromagnetic input device and electromagnetic input method for identifying interference - Google Patents
Electromagnetic input device and electromagnetic input method for identifying interference Download PDFInfo
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- CN112328129B CN112328129B CN202011220819.0A CN202011220819A CN112328129B CN 112328129 B CN112328129 B CN 112328129B CN 202011220819 A CN202011220819 A CN 202011220819A CN 112328129 B CN112328129 B CN 112328129B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- 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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
-
- 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
-
- 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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides an electromagnetic input device and an electromagnetic input method for identifying interference, wherein the electromagnetic input device comprises an antenna board, a central processing unit connected with the antenna board and a transmitting circuit connected with the central processing unit, the transmitting circuit comprises a first transmitting circuit and a second transmitting circuit, the first transmitting circuit is a high-resistance output circuit, and the second transmitting circuit is a high-level output circuit. The electromagnetic input method comprises the steps of providing an electromagnetic input device, detecting an interference signal, judging the interference signal before global scanning, judging the interference signal in local scanning and processing the interference signal. The electromagnetic input device and the electromagnetic input method for identifying the interference can solve the problem that electromagnetic handwriting is subjected to electromagnetic interference while the point reporting rate of electromagnetic handwriting is not affected, and improve the smoothness and accuracy of electromagnetic handwriting.
Description
[ field of technology ]
The present invention relates to the field of electromagnetic induction technologies, and in particular, to an electromagnetic input device and an electromagnetic input method for identifying interference.
[ background Art ]
In the existing electromagnetic pressure sensing technology, a layer of circuit board (such as a keyboard and the like) is arranged below a handwriting board in some application places, a magnetic field can be generated in a certain range in an antenna of the handwriting board after the circuit is electrified, and a magnetic field can also be generated in a handwriting pen. The handwriting board after the patent technology solves the problem of incorrect position coordinates, is smooth to write, and can sense the pressure applied by a user to the pen point, so that the handwriting of the input strokes is truly reflected.
For electromagnetic handwriting, the writing pad has a long life because it is not required to apply pressure to the writing pad to write. However, because the electromagnetic board has a certain requirement on power supply stability, the electromagnetic board is unstable and even cannot work under the condition that the power supply is not up to the requirement, and the handwriting board needs to be connected with the PS/2 port and the COM port at the same time. Therefore, the electromagnetic plate cannot be used on some machines, and meanwhile, the electromagnetic plate has excessive relative power consumption and is easy to be interfered by the electromagnetic waves of the external environment, for example, when a mobile phone is beside or a handwriting pen approaches to a loudspeaker box, the electromagnetic plate can hardly work.
When the conventional electromagnetic handwriting equipment is placed in a scene with larger interference, such as a keyboard, handwriting cursors or functions are disturbed, and interference is generated on the handwriting performance of the handwriting equipment, so that the handwriting smoothness and accuracy of the electromagnetic handwriting equipment are not facilitated.
Therefore, it is necessary to provide an electromagnetic handwriting method and an electromagnetic handwriting device for recognizing interference to solve the above problems.
[ invention ]
The electromagnetic handwriting equipment in the prior art is placed in a scene with larger interference to easily cause the disorder of handwriting cursors or functions, the interference is generated on the handwriting performance of the handwriting equipment, and the handwriting smoothness and accuracy of the electromagnetic handwriting equipment are influenced, so that the invention provides an electromagnetic input device and an electromagnetic input method for identifying the interference.
The electromagnetic input device for identifying interference comprises an antenna board, a central processing unit connected with the antenna board, and a transmitting circuit connected with the central processing unit, wherein the transmitting circuit comprises a first transmitting circuit and a second transmitting circuit, the first transmitting circuit is a high-resistance output circuit, and the second transmitting circuit is a high-level output circuit.
Preferably, the electromagnetic input device further comprises an antenna selection unit, a conversion unit and an amplifying unit, wherein the antenna selection unit, the conversion unit and the amplifying unit are arranged between the antenna board and the central processing unit.
The invention also provides an electromagnetic input method for identifying interference, which is characterized by comprising the following steps:
step S01, providing the electromagnetic input device;
step S02, detecting an interference signal: the antenna board does not emit signals, the MCU of the first emission circuit is provided with high-resistance output, the MCU of the second emission circuit is provided with high-level output, the first emission circuit or the second emission circuit is provided with the first emission circuit or the second emission circuit, then the judgment of the interference signal before global scanning is carried out, and the step S03 or the step S04 is selected to be carried out;
step S03, judging an interference signal before global scanning: the antenna board does not emit signals, whether an electromagnetic pen exists or not is detected in global scanning, if the position and the pressure sensing signal of the pen exist, the electromagnetic pen proves to be an interference signal, and an MCU of the emitting circuit does not upload coordinate data or interference marks to an upper computer;
step S04, judging an interference signal in the local scanning: the antenna board transmits signals, a preset value A is set according to the point reporting rate and the experience value, and when the uploaded coordinate data is larger than the preset value A, the antenna board judges that the antenna board is an interference signal;
step S05, processing interference signals: and processing the interference signal by adopting an average compensation method or a trend compensation method.
Preferably, in the step S04, a preset fixed time period B is set according to the report rate and the experience value, and the interference determination is performed in the preset fixed time period B.
Preferably, after the step S02 is finished, the steps S03 and S04 are sequentially performed.
Preferably, in the step S05, the average compensation method includes: when a discrete single-point interference signal is identified, pre-interference data (X 1 、Y 1 ) And data after the interference signal (X 2 ，Y 2 ) To obtain processed data (X, Y), where x= (X) 1 +X 2 )/2，Y＝(Y 1 +Y 2 )/2。
Preferably, in the step S05, the trend compensation method includes: when a non-discrete wide pulse interference signal is detected, a plurality of sets of data (X 1 、Y 1 )、(X 2 ，Y 2 )、(X 3 ，Y 3 ) The interference coordinates are obtained through first-order, second-order, third-order or multi-order function calculation:
(X，Y)＝F{(X 1 ，Y 1 )，(X 2 ，Y 2 )，(X 3 ，Y 3 ),...}。
compared with the prior art, the electromagnetic input device and the electromagnetic input method for identifying interference provided by the invention have the advantages that the first transmitting circuit and the second transmitting circuit are arranged, meanwhile, the first transmitting circuit is the high-resistance output circuit, the second transmitting circuit is the high-level output circuit, the interference signals are respectively judged before global scanning or in local scanning, and the interference signals are processed, so that the problem that electromagnetic handwriting is subjected to electromagnetic interference can be solved while the point reporting rate of electromagnetic handwriting is not influenced, and the smoothness and accuracy of electromagnetic handwriting are improved.
[ description of the drawings ]
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic diagram of an electromagnetic input device for recognizing interference according to the present invention;
FIG. 2 is a flowchart of a first embodiment of an electromagnetic input method for identifying interference according to the present invention;
FIG. 3 is a flowchart of a second embodiment of an electromagnetic input method for identifying interference according to the present invention;
fig. 4 is a flowchart of a third embodiment of an electromagnetic input method for identifying interference according to the present invention.
[ detailed description ] of the invention
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides an electromagnetic input device 100 for identifying interference, wherein the electromagnetic input device 100 includes an antenna board 10, a central processing unit 20 connected to the antenna board 10, a transmitting circuit 30 connected to the central processing unit 20, a converting unit 40 disposed between the antenna board and the central processing unit, an antenna selecting unit 50, and an amplifying unit 60. Specifically, the antenna board 10 is configured to transmit and receive electromagnetic induction signals, the central processing unit 20 is respectively connected to the antenna selection unit 50 and the transmitting circuit 30, and is configured to select antennas of the transmitting circuit 30 and the antenna board 10, and signals transmitted by the transmitting circuit 30 and the antenna board 10 are respectively processed by the conversion unit 40 and the amplifying unit 40. In particular, the transmitting circuit 30 includes a first transmitting circuit that is a high-resistance output circuit and a second transmitting circuit that is a high-level output circuit.
First embodiment
Referring to fig. 1 and fig. 2 in combination, the present invention further provides an electromagnetic input method for identifying interference, which includes the following steps:
step S101, providing the electromagnetic input device 100;
step S102, detecting an interference signal: the antenna board 10 does not emit signals, the MCU of the first emission circuit is provided with high-resistance output, the MCU of the second emission circuit is provided with high-level output, and the first emission circuit or the second emission circuit judges the interference signals before global scanning;
step S103, judging an interference signal before global scanning: the antenna board does not transmit signals, whether an electromagnetic pen exists or not is detected in global scanning, if the signals of the pen exist, the signals prove to be interference signals, and an MCU of the transmitting circuit does not upload coordinate data or interference marks to an upper computer;
step S104, processing interference signals: and processing the interference signal by adopting an average compensation method or a trend compensation method.
In step S104, the average compensation method includes: when a discrete single-point interference signal is identified, pre-interference data (X 1 、Y 1 ) And data after the interference signal (X 2 ，Y 2 ) To obtain processed data (X, Y), where x= (X) 1 +X 2 )/2，Y＝(Y 1 +Y 2 )/2. The trend compensation method comprises the following steps: when a non-discrete wide pulse interference signal is detected, a plurality of sets of data (X 1 、Y 1 )、(X 2 ，Y 2 )、(X 3 ，Y 3 ) The interference coordinates are obtained through first-order, second-order, third-order or multi-order function calculation:
(X，Y)＝F{(X 1 ，Y 1 )，(X 2 ，Y 2 )，(X 3 ，Y 3 ),...}。
second embodiment:
referring to fig. 1 and fig. 3 in combination, fig. 3 is a flowchart of a second embodiment of an electromagnetic input method for identifying interference according to the present invention, which includes the following steps:
step S201, providing the electromagnetic input device 100;
step S202, detecting an interference signal: the antenna board does not emit signals, the MCU of the first emission circuit is provided with high-resistance output, the MCU of the second emission circuit is provided with high-level output, the first emission circuit or the second emission circuit judges the interference signals before global scanning, and the step S203 is selected to be entered;
step S203, determining an interference signal in the local scan: the antenna board transmits signals, a preset value A is set according to the point reporting rate and the experience value, and when the uploaded coordinate data is larger than the preset value A, the antenna board judges that the antenna board is an interference signal;
step S204, processing interference signals: and processing the interference signal by adopting an average compensation method or a trend compensation method. The processing method is the same as that in the first embodiment, and will not be described here again.
Third embodiment:
referring to fig. 1 and fig. 4 in combination, fig. 4 is a flowchart of a third embodiment of an electromagnetic input method for identifying interference according to the present invention.
Step S301, providing the electromagnetic input device 100;
step S302, detecting an interference signal: the antenna board does not emit signals, the MCU of the first emission circuit is provided with high-resistance output, the MCU of the second emission circuit is provided with high-level output, the first emission circuit or the second emission circuit judges the interference signals before global scanning, and the step S303 or the step S304 is selected to be entered;
step S303, judging an interference signal before global scanning: the antenna board does not transmit signals, whether an electromagnetic pen exists or not is detected in global scanning, if the signals of the pen exist, the signals prove to be interference signals, and an MCU of the transmitting circuit does not upload coordinate data or interference marks to an upper computer;
step S304, judging interference signals in the local scanning: the antenna board transmits signals, a preset value A is set according to the point reporting rate and the experience value, and when the uploaded coordinate data is larger than the preset value A, the antenna board judges that the antenna board is an interference signal;
step S305, processing the interference signal: and processing the interference signal by adopting an average compensation method or a trend compensation method. The processing method is the same as that in the first embodiment, and will not be described here again.
Compared with the prior art, the electromagnetic input device 100 for identifying interference provided by the invention has the advantages that the first transmitting circuit and the second transmitting circuit are arranged, meanwhile, the first transmitting circuit is the high-resistance output circuit, the second transmitting circuit is the high-level output circuit, the interference signals are respectively judged before global scanning or in local scanning, and the interference signals are processed, so that the problem that electromagnetic handwriting is subjected to electromagnetic interference can be solved while the point reporting rate of electromagnetic handwriting is not influenced, and the fluency and accuracy of electromagnetic handwriting are improved.
While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.
Claims (5)
1. An electromagnetic input method for identifying interference, comprising the steps of:
step S01, providing an electromagnetic input device for identifying interference, wherein the electromagnetic input device comprises an antenna board, a central processing unit connected with the antenna board and a transmitting circuit connected with the central processing unit, the transmitting circuit comprises a first transmitting circuit and a second transmitting circuit, the first transmitting circuit is a high-resistance output circuit, and the second transmitting circuit is a high-level output circuit; the electromagnetic input device also comprises an antenna selection unit, a conversion unit and an amplifying unit which are arranged between the antenna board and the central processing unit;
step S02, detecting an interference signal: the antenna board does not emit signals, the MCU of the first emission circuit is provided with high-resistance output, the MCU of the second emission circuit is provided with high-level output, the first emission circuit or the second emission circuit is provided with the first emission circuit or the second emission circuit, then the judgment of the interference signal before global scanning is carried out, and the step S03 or the step S04 is selected to be carried out;
step S03, judging an interference signal before global scanning: the antenna board does not emit signals, whether an electromagnetic pen exists or not is detected in global scanning, if the position and the pressure sensing signal of the pen exist, the electromagnetic pen proves to be an interference signal, and an MCU of the emitting circuit does not upload coordinate data or interference marks to an upper computer;
step S04, judging an interference signal in the local scanning: the antenna board transmits signals, a preset value A is set according to the point reporting rate and the experience value, and when the uploaded coordinate data is larger than the preset value A, the antenna board judges that the antenna board is an interference signal;
step S05, processing interference signals: and processing the interference signal by adopting an average compensation method or a trend compensation method.
2. The electromagnetic input method for recognizing interference according to claim 1, wherein in the step S04, a preset fixed time period B is set according to the report rate and the empirical value, and the interference judgment is performed in the preset fixed time period B.
3. The electromagnetic input method for recognizing interference according to claim 1, wherein the step S03 and the step S04 are sequentially performed after the step S02 is completed.
4. The electromagnetic input method for recognizing interference according to claim 1, wherein in the step S05, the average compensation method includes: when a discrete single-point interference signal is identified, pre-interference data (X 1 、Y 1 ) And data after the interference signal (X 2 ，Y 2 ) To obtain processed data (X, Y), where x= (X) 1 +X 2 )/2，Y＝(Y 1 +Y 2 )/2。
5. The electromagnetic input method for recognizing interference according to claim 1, wherein in the step S05, the trend compensation method includes: when a non-discrete wide pulse interference signal is detected, the interference coordinates are obtained by calculating a plurality of groups of data in front of the interference signal through a first-order function, a second-order function or a multi-order function:
(X，Y)＝F{(X 1 ，Y 1 )，(X 2 ，Y 2 )，(X 3 ，Y 3 ),...}。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220819.0A CN112328129B (en) | 2020-11-05 | 2020-11-05 | Electromagnetic input device and electromagnetic input method for identifying interference |
| TW110128171A TWI789855B (en) | 2020-11-05 | 2021-07-30 | Electromagnetic input device and method for identifying interference |
| KR1020210118676A KR102615476B1 (en) | 2020-11-05 | 2021-09-06 | Electromagnetic input method for identifying interference |
| JP2021155425A JP7292341B2 (en) | 2020-11-05 | 2021-09-24 | Electromagnetic input device and method capable of identifying interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011220819.0A CN112328129B (en) | 2020-11-05 | 2020-11-05 | Electromagnetic input device and electromagnetic input method for identifying interference |
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| CN112328129A CN112328129A (en) | 2021-02-05 |
| CN112328129B true CN112328129B (en) | 2023-07-18 |
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| CN202011220819.0A Active CN112328129B (en) | 2020-11-05 | 2020-11-05 | Electromagnetic input device and electromagnetic input method for identifying interference |
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| JP (1) | JP7292341B2 (en) |
| KR (1) | KR102615476B1 (en) |
| CN (1) | CN112328129B (en) |
| TW (1) | TWI789855B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6636184B1 (en) * | 2002-05-01 | 2003-10-21 | Aiptek International Inc. | Antenna layout and coordinate positioning method for electromagnetic-induction systems |
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| JPH07311647A (en) * | 1994-05-16 | 1995-11-28 | Wacom Co Ltd | Position detection device and its noise removing method |
| JP2001013183A (en) * | 1999-06-30 | 2001-01-19 | Toshiba Corp | Electromagnetic wave disturbance source surveying method and device thereof |
| JP4564680B2 (en) * | 2001-03-29 | 2010-10-20 | 株式会社ワコム | Position detection device |
| KR100531800B1 (en) * | 2003-12-29 | 2005-12-02 | 엘지전자 주식회사 | Noise filtering method for touch screen |
| JP4547000B2 (en) * | 2004-04-01 | 2010-09-22 | 株式会社ワコム | Panel and cordless transducer system |
| US8124892B2 (en) * | 2008-11-03 | 2012-02-28 | Waltop International Corp. | Electromagnetic manuscript input apparatus and method thereof |
| KR101080254B1 (en) * | 2009-06-02 | 2011-11-08 | (주)펜앤프리 | Method for inputting handwriting using touchscreen and handwriting input device using the same |
| TWI419019B (en) * | 2010-03-05 | 2013-12-11 | Waltop Int Corp | Light weight and full planar electromagnetic digitizer |
| CN102214029A (en) * | 2010-04-09 | 2011-10-12 | 元太科技工业股份有限公司 | Touch display structure and touch display device containing same |
| CN101957705B (en) * | 2010-09-30 | 2012-05-02 | 汉王科技股份有限公司 | Electromagnetic handwriting equipment and noise recognizing method thereof |
| JP6008392B2 (en) * | 2012-07-24 | 2016-10-19 | 株式会社ワコム | Indicator position detection device |
| CN103793122B (en) * | 2012-10-26 | 2016-12-21 | 汉王科技股份有限公司 | Electromagnetic touch-control device and electromagnetic touch method |
| TWI496066B (en) * | 2013-07-10 | 2015-08-11 | Wacom Co Ltd | Electromagnetic input device and detecting coil circuit thereof |
| KR101921675B1 (en) * | 2014-01-26 | 2018-11-23 | 후아웨이 디바이스 (둥관) 컴퍼니 리미티드 | Touchscreen interference suppression method and apparatus, and terminal device |
| KR20190080997A (en) * | 2017-12-28 | 2019-07-09 | 주식회사 더한 | Pen Input Device Supporting Heterogeneous Input Device |
| US10719148B2 (en) * | 2018-07-10 | 2020-07-21 | Microsoft Technology Licensing, Llc | Coupling a pen device to a companion device based on pen proximity |
-
2020
- 2020-11-05 CN CN202011220819.0A patent/CN112328129B/en active Active
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2021
- 2021-07-30 TW TW110128171A patent/TWI789855B/en active
- 2021-09-06 KR KR1020210118676A patent/KR102615476B1/en active IP Right Grant
- 2021-09-24 JP JP2021155425A patent/JP7292341B2/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6636184B1 (en) * | 2002-05-01 | 2003-10-21 | Aiptek International Inc. | Antenna layout and coordinate positioning method for electromagnetic-induction systems |
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| Publication number | Publication date |
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| CN112328129A (en) | 2021-02-05 |
| JP7292341B2 (en) | 2023-06-16 |
| TWI789855B (en) | 2023-01-11 |
| TW202219727A (en) | 2022-05-16 |
| KR102615476B1 (en) | 2023-12-20 |
| KR20220060993A (en) | 2022-05-12 |
| JP2022075512A (en) | 2022-05-18 |
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