CN113238675A - Electromagnetic position input device and input position detection method - Google Patents
Electromagnetic position input device and input position detection method Download PDFInfo
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- CN113238675A CN113238675A CN202110354907.8A CN202110354907A CN113238675A CN 113238675 A CN113238675 A CN 113238675A CN 202110354907 A CN202110354907 A CN 202110354907A CN 113238675 A CN113238675 A CN 113238675A
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- 230000005284 excitation Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 238000004590 computer program Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
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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
- G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
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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
- G06F3/033—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
- G06F3/03543—Mice or pucks
- G06F3/03544—Mice or pucks having dual sensing arrangement, e.g. two balls or two coils used to track rotation of the pointing device
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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
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
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Abstract
The invention discloses an electromagnetic position input device and an input position detection method, wherein the input position detection method comprises the following steps: and detecting the direction of induced current in the antenna coil, and when the first antenna coil is detected and the direction of the induced current in the first antenna coil meets the judgment condition, determining that the input position of the input pen is a first input position, wherein the first input position is located at the position of the first antenna coil. The invention can determine the current actual input position of the input pen in the inductible range of which antenna coil according to the direction of the induced current in the antenna coil, thereby avoiding or reducing the occurrence of the 'rebound' phenomenon of the input point in the prior art. After the phenomenon of springback is avoided, a limiting structure is not needed to be arranged to limit the operable range of a user when the electromagnetic position input device is produced, and the hardware resources of the electromagnetic position input device can be fully utilized. The invention is widely applied to the technical field of electromagnetic position input.
Description
Technical Field
The invention relates to the technical field of electromagnetic position input, in particular to an electromagnetic position input device and an input position detection method.
Background
The electromagnetic position input device is also called an electromagnetic input board, a digitizer, or the like, and its main part is an input panel. The input panel includes a plurality of antenna coils that are arranged along the vertical plane along the horizontal plane, and when an input pen that generates a magnetic field by itself or under excitation of the antenna coils is used to write on the input panel, the antenna coils induce the magnetic field generated by the input pen. In the prior art, the measured values of the magnetic field intensity or the magnetic field energy and the like sensed by the antenna coil are processed through an algorithm in the processor, so that the relative position of the input pen and the input panel can be determined, the input position of the input pen on the input panel is further determined, and then pen touch, handwriting or operation effects and the like are displayed on the input position or other corresponding positions.
Fig. 1 is a schematic diagram of one of the above-mentioned prior arts, each of the panels in fig. 1 respectively shows different positions of a stylus on an input panel, the image below each panel shows the magnitude of magnetic field intensity or magnetic field energy sensed by antenna coils of portions of the input panel at positions near the stylus, the intersection point in each panel shows the input position of the stylus recognized by the input panel, and the dotted arrow in each panel shows the moving track of the stylus. When the actual input position of the input pen is inside the input panel, the position of the position with the maximum magnetic field strength sensed by each antenna coil of the input panel is the same as the actual input position, and the accuracy of the technical means for detecting the input position through the position with the maximum magnetic field strength in the prior art is higher. However, when the actual input position of the input pen is outside the input panel, the input panel should not recognize the input position of the input pen, but the magnetic field generated by the input pen is still sensed by the antenna coil of the input panel, and even the magnetic field intensity inside the input panel is larger than the magnetic field intensity at the edge of the input panel, at this time, the situation shown in the last two small figures in fig. 1 will occur, that is, although the input pen has moved outside the input panel, the input panel recognizes that the input position of the input pen is inside the input panel, so that the phenomenon of 'rebounding' of the input point will occur when the input pen continuously moves from inside to outside of the input panel, causing inconvenience in use or misoperation. However, in the prior art, a limiting structure is arranged on the input panel, for example, a baffle is used to block the edge of the input panel, so that a user can only input at the inner position of the input panel, which means that the edge of the input panel is not allowed to be used, resulting in waste of resources.
Disclosure of Invention
In view of at least one of the above problems, it is an object of the present invention to provide an electromagnetic position input device and an input position detection method.
In one aspect, an embodiment of the present invention provides an input position detection method for an electromagnetic position input device, where the electromagnetic position input device includes a plurality of antenna coils, and the antenna coils are configured to detect a magnetic field generated by an input pen, and the input position detection method includes:
detecting a direction of a current induced in some or all of the antenna coils; the induced current is the current generated by the magnetic field generated by the input pen cutting the antenna coil;
when a first antenna coil is detected, and the direction of the induced current in the first antenna coil meets a judgment condition, determining that the input position of the input pen is a first input position, wherein the first input position is located at the position of the first antenna coil.
Further, the input position detection method further includes:
when the direction of the induced current in any of the antenna coils is not detected to satisfy the determination condition, re-detecting the input position of the stylus pen.
Further, the detecting a direction of a current induced in some or all of the antenna coils includes:
detecting the intensity of the currents induced in all the antenna coils;
the direction of the induced current is detected for one or more of the antenna coils having the largest induced current intensity.
Further, the determination condition includes: at the same time, the direction of the induced current in the antenna coil is the same as the direction of the excitation current; the excitation current is a current input to the antenna coil to excite the stylus pen.
Further, the determining that the input position of the input pen is the first input position includes:
acquiring a coordinate range corresponding to the first antenna coil;
the first input position is determined within the coordinate range of the first antenna coil.
Further, the determining the first input position within the coordinate range of the first antenna coil includes:
detecting the intensity of the induced current in the first antenna coil;
and determining specific coordinates of the input position of the input pen according to the intensity of the induced current in the first antenna coil and the coordinate range corresponding to the first antenna coil.
In another aspect, an embodiment of the present invention further includes an electromagnetic position input device, including:
a plurality of antenna coils;
a synchronous signal detector; the synchronous signal detector is used for detecting the direction of the induced current in part or all of the antenna coils; the induced current is generated by cutting the antenna coil by a magnetic field generated by an input pen;
a processor; the processor is used for determining that the input position of the input pen is a first input position when a first antenna coil is detected and the direction of the induced current in the first antenna coil meets a judgment condition, wherein the first input position is located at the position of the first antenna coil.
Further, the processor is further configured to detect an input position of the stylus pen again when the direction of the induced current in none of the antenna coils is detected to satisfy the determination condition.
Further, the electromagnetic position input device further includes:
a synchronization signal controller; the synchronous signal controller is used for driving the antenna coil to excite the input pen.
Further, the synchronous signal detector is configured to output a signal higher than a reference potential or lower than the reference potential when the direction of the induced current in one of the antenna coils is detected to be the same as the direction of the excitation current at the same time, and output a signal lower than the reference potential or higher than the reference potential when the direction of the induced current in one of the antenna coils is detected to be opposite to the direction of the excitation current at the same time.
The invention has the beneficial effects that: the electromagnetic position input device in the embodiment can determine the current actual input position of the input pen within the inductible range of which antenna coil through the direction of the induced current in the antenna coil, so that the phenomenon of 'rebounding' of the input point in the prior art can be avoided or reduced. After the phenomenon of springback is avoided, a limiting structure is not needed to be arranged to limit the operable range of a user when the electromagnetic position input device is produced, and the hardware resources of the electromagnetic position input device can be fully utilized.
Drawings
FIG. 1 is a schematic diagram of an electromagnetic position input device according to the prior art;
FIGS. 2 and 3 are schematic diagrams showing the relative positions of the stylus pen and the antenna coil and the relationship between the directions of induced currents in the embodiments;
FIG. 4 is a schematic structural diagram of an antenna coil mounted on the electromagnetic position input device in the embodiment;
fig. 5 is a circuit configuration diagram of an electromagnetic position input device according to an embodiment.
Detailed Description
In this embodiment, in consideration of the operating principles of the electromagnetic position input device and the input pen, reference is made to fig. 2 and 3, which illustrate the positional relationship between the wound core for generating the magnetic field on the input pen and the antenna coil on the input panel, and the direction of the magnetic field generated by the wound core and the direction of the induced current formed by the antenna coil being cut by the magnetic lines of force generated by the wound core. In fig. 2, the bobbin of the stylus pen is outside an antenna coil, and when the magnetic field generated by the bobbin cuts the antenna coil of fig. 2, the direction of the induced current generated in the antenna coil is counterclockwise. In fig. 3, the bobbin of the stylus pen is located inside an antenna coil, and when the magnetic field generated by the bobbin cuts the antenna coil of fig. 3, the direction of the induced current generated in the antenna coil is clockwise. In fact, since the antenna coil with the largest wound core is excited to generate a magnetic field, according to the electromagnetic induction law, when the actual input position of the input pen is out of the inductivity range of a certain antenna coil, the direction of an induced current generated by the magnetic field generated by the input pen cutting the antenna coil is opposite to the direction of an excitation current in the antenna coil; when the actual input position of the input pen is within the inductible range of a certain antenna coil, the direction of induced current generated by cutting the antenna coil by the magnetic field generated by the input pen is the same as the direction of exciting current in the antenna coil.
On the basis of fig. 2 and 3, the multiple antenna coils shown in fig. 4 were analyzed. The multiple antenna coils shown in fig. 4 are antenna coil structures widely used in the present electromagnetic position input device, and the multiple antenna coils are uniformly arranged at a certain interval, and a certain overlap range is provided between two adjacent antenna coils. In fig. 4, the actual input position of the stylus pen, i.e., the bobbin of the stylus pen, is within the sensible range of the antenna coils numbered 1, 2, 3, 4, and is outside the sensible range of the antenna coils numbered 5, 6. The directions of the excitation currents in the antenna coils in fig. 4 are all clockwise directions, the directions of arrows shown in the antenna coils in fig. 4 are the directions of the induced currents in the antenna coils determined according to the electromagnetic induction law, wherein the directions of the induced currents in the antenna coils numbered 1, 2, 3, and 4 are all clockwise directions, the directions of the induced currents in the antenna coils numbered 5 and 6 are all counterclockwise directions, that is, the directions of the induced currents in the antenna coils numbered 1, 2, 3, and 4 are the same as the directions of the excitation currents, and the directions of the induced currents in the antenna coils numbered 5 and 6 are opposite to the directions of the excitation currents.
Based on the above principle, the electromagnetic position input device shown in fig. 5 is designed to mainly include a processor, a synchronous signal controller, a synchronous signal detector, a plurality of antenna coils, a signal transmission buffer, a transmission/reception switch, a data multiplexer, a signal amplifier, a band-pass filter, a low-pass filter, an S/H sample holder, an a/D converter, and the like.
The basic principle of the circuit shown in fig. 5 is: the processor controls the synchronous signal controller to output excitation current to the antenna coil, the antenna coil can generate a magnetic field to excite the input pen under the driving of the excitation current, and the input pen is excited to obtain energy for generating the magnetic field. The signal sending buffer, the receiving and sending switch, the data multiplexer and other devices respectively play roles in buffering delay, connection on-off, antenna coil selection and the like of driving signals. After a magnetic field generated by the input pen is sensed by the antenna coil, the induced voltage or current signal is detected by the synchronous signal detector after being preprocessed by the signal amplifier and the band-pass filter in sequence. In this embodiment, the synchronous signal detector is used to detect the direction of the voltage or current signal induced by the antenna coil, and in this embodiment, the synchronous signal detector and the synchronous signal controller are linked to determine the direction of the voltage or current signal induced by the antenna coil. Specifically, if the direction of the voltage or current signal induced by the stylus pen coil is the same as the direction of the excitation current in the antenna coil, it is determined that the direction of the voltage or current signal induced by the antenna coil is a forward direction; if the direction of the voltage or current signal induced by the stylus coil is opposite to the direction of the excitation current in the antenna coil, then the direction of the voltage or current signal induced by the antenna coil is determined to be opposite.
Specifically, the synchronization signal detector is set to: when the direction of the induced current in one antenna coil is detected to be the same direction, outputting a signal higher than a reference potential or lower than the reference potential; when the direction of the induced current in one of the antenna coils is detected to be reversed, a signal lower than the reference potential or higher than the reference potential is output. The reference potential may be half of the operating voltage of the synchronous signal detector. The signal output by the synchronous signal detector is converted into a digital signal after being processed by the S/H sampling holder and the A/D converter, for example, 0 represents that the synchronous signal detector outputs a signal higher than or lower than a reference potential, and 1 represents that the synchronous signal detector outputs a signal lower than or higher than the reference potential, so as to trigger the processor to execute corresponding steps.
In this embodiment, the processor is further in communication with the transceiving switch and the data multiplexer, and determines, according to the operating states of the transceiving switch and the data multiplexer, which antenna coil corresponds to the signal indicating the direction of the induced current in the antenna coil output by the synchronous signal detector.
In this embodiment, the input position detecting method in this embodiment can be executed by the electromagnetic position input device shown in fig. 5. The input position detection method comprises the following steps:
s1, detecting the intensity of induced current in part or all of antenna coils;
s2, when the first antenna coil is detected and the direction of induced current in the first antenna coil meets the judgment condition, determining that the input position of the input pen is a first input position, wherein the first input position is located at the position of the first antenna coil;
and S3, detecting the input position of the input pen again when the direction of the induced current in any antenna coil cannot be detected to meet the judgment condition.
In step S1, the processor may detect the directions of the induced currents in the plurality of antenna coils simultaneously or sequentially within a short period of time in a scanning manner, and determine whether there is an antenna coil in which the direction of the induced current satisfies the determination condition. In step S1, all antenna coils may be scanned, or some antenna coils may be scanned, so as to improve the execution efficiency. If the antenna coils of a part are scanned, the strength of the induced currents in all the antenna coils can be detected, then one or more antenna coils with the maximum induced current strength are determined, and the direction of the induced currents of the antenna coils is detected. Because the antenna coil or the antenna coils with the maximum induced current intensity are generally the antenna coils closest to the input pen and are more likely to be located at or near the actual input position of the input pen, the antenna coil or the antenna coils to be scanned are selected according to the intensity of the induced current in the antenna coils, and then the direction of the induced current is detected by the selected antenna coil or the selected antenna coils, so that the number of the antenna coils to be scanned and detected can be reduced under the condition of having a considerable detection accuracy, and the execution efficiency is improved.
In step S2, if it is detected that there is an antenna coil in which the direction of the induced current satisfies the determination condition, this antenna coil is the first antenna coil in the present embodiment. The fact that the direction of the induced current satisfies the determination condition means that the direction of the induced current in the antenna coil is the same as the direction of the excitation current at the same time, that is, the direction of the induced current is the positive direction.
Therefore, step S2 may specifically be: if the direction of the induced current in one antenna coil is detected to be the positive direction, the antenna coil is determined to be a first antenna coil, then the coordinate range on the input panel corresponding to the position of the first antenna coil is determined in a mode of inquiring the equipment parameters, and the first input position is determined in the coordinate range.
In this embodiment, the steps S1-S2 are executed, and the current actual input position of the input pen can be determined within the sensing range of which antenna coil is located according to the direction of the induced current in the antenna coil, so that when the input position is detected simply by using the magnetic field strength or the magnetic field energy generated by the input pen in the prior art, the erroneous judgment caused by the fact that the actual input position of the input pen moves out of the input panel but still generates a magnetic field influence on the antenna coil can be avoided, and the occurrence of the "bounce" phenomenon of the input point in the prior art can be avoided or reduced. After the phenomenon of springback is avoided, a limiting structure is not needed to be arranged to limit the operable range of a user when the electromagnetic position input device is produced, and the hardware resources of the electromagnetic position input device can be fully utilized.
In step S3, if the processor does not detect the first antenna coil in the present embodiment, that is, does not detect the direction of the induced current in any antenna coil is positive, then the corresponding situation is that the stylus pen has moved out of the sensing range of all the antenna coils in the input panel, or the user has not used the stylus pen for input at all. At this point, the processor will re-detect the input position of the stylus, thereby avoiding the "bounce" phenomenon. The processor maintains the input position of the stylus pen as the position detected when the step S2 was last performed before the first antenna coil or other antenna coils having a forward induced current other than the first antenna coil are detected again, to improve the execution efficiency.
In this embodiment, the electromagnetic position input device may further perform the following steps on the basis of performing the steps S1-S2 or S1-S3:
s4, detecting the intensity of induced current in the first antenna coil;
and S5, determining specific coordinates of the input position of the input pen according to the intensity of the induced current in the first antenna coil and the coordinate range corresponding to the first antenna coil.
Upon performing the steps S1-S2 or S1-S3, it can be determined that the actual input position of the stylus pen is within the coordinate range corresponding to the first antenna coil, at which time the specific coordinates of the input position of the stylus pen can be calculated using the existing or newly developed means of calculating the coordinates of the input position from the intensity of the induced current in the antenna coil, thereby determining the precise position of the input position of the stylus pen. Since the steps S1-S2 or S1-S3 have been performed before the steps S4-S5 are performed, the occurrence of the "bounce" phenomenon can be avoided, and since the range of the input position of the input pen has been confirmed by performing the steps S1-S2 or S1-S3, the steps S4-S5 are performed at a faster speed than the related art in which the input position coordinates are calculated from the intensity of the induced current in the antenna coil.
The input position detection method in the present embodiment may be executed by writing a computer program that executes the data processing method in the present embodiment, writing the computer program into a computer device or a storage medium, and when the computer program is read out and run.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided with this embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
A computer program can be applied to input data to perform the functions described in the present embodiment to convert the input data to generate output data that is stored to a non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (10)
1. An input position detecting method for an electromagnetic position input device including a plurality of antenna coils for detecting a magnetic field generated by an input pen, comprising:
detecting a direction of a current induced in some or all of the antenna coils; the induced current is the current generated by the magnetic field generated by the input pen cutting the antenna coil;
when a first antenna coil is detected, and the direction of the induced current in the first antenna coil meets a judgment condition, determining that the input position of the input pen is a first input position, wherein the first input position is located at the position of the first antenna coil.
2. An input position detection method according to claim 1, wherein the input position detection method further comprises:
when the direction of the induced current in any of the antenna coils is not detected to satisfy the determination condition, re-detecting the input position of the stylus pen.
3. An input position detecting method according to claim 1 or 2, wherein said detecting a direction of a current induced in part or all of said antenna coils comprises:
detecting the intensity of the currents induced in all the antenna coils;
the direction of the induced current is detected for one or more of the antenna coils having the largest induced current intensity.
4. An input position detection method according to claim 1 or 2, wherein the determination condition includes: at the same time, the direction of the induced current in the antenna coil is the same as the direction of the excitation current; the excitation current is a current input to the antenna coil to excite the stylus pen.
5. The input position detection method according to claim 1 or 2, wherein the determining that the input position of the input pen is the first input position includes:
acquiring a coordinate range corresponding to the first antenna coil;
the first input position is determined within the coordinate range of the first antenna coil.
6. An input position detecting method according to claim 5, wherein said determining the first input position within the coordinate range of the first antenna coil includes:
detecting the intensity of the induced current in the first antenna coil;
and determining specific coordinates of the input position of the input pen according to the intensity of the induced current in the first antenna coil and the coordinate range corresponding to the first antenna coil.
7. An electromagnetic position input device, comprising:
a plurality of antenna coils;
a synchronous signal detector; the synchronous signal detector is used for detecting the direction of the induced current in part or all of the antenna coils; the induced current is generated by cutting the antenna coil by a magnetic field generated by an input pen;
a processor; the processor is used for determining that the input position of the input pen is a first input position when a first antenna coil is detected and the direction of the induced current in the first antenna coil meets a judgment condition, wherein the first input position is located at the position of the first antenna coil.
8. An electromagnetic position input device as defined in claim 7, wherein the processor is further configured to re-detect an input position of the stylus pen when the direction of the induced current in any of the antenna coils is not detected to satisfy the determination condition.
9. The electromagnetic position input device of claim 7 or 8, further comprising:
a synchronization signal controller; the synchronous signal controller is used for driving the antenna coil to excite the input pen.
10. The electromagnetic position input device according to claim 7 or 8, wherein the synchronization signal detector is configured to output a signal higher than a reference potential or lower than a reference potential when a direction of the induced current in one of the antenna coils is the same as a direction of the excitation current at the same time, and to output a signal lower than a reference potential or higher than a reference potential when a direction of the induced current in one of the antenna coils is opposite to the direction of the excitation current at the same time.
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| CN202110354907.8A CN113238675A (en) | 2021-04-01 | 2021-04-01 | Electromagnetic position input device and input position detection method |
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| CN202110354907.8A CN113238675A (en) | 2021-04-01 | 2021-04-01 | Electromagnetic position input device and input position detection method |
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| CN202110354907.8A Pending CN113238675A (en) | 2021-04-01 | 2021-04-01 | Electromagnetic position input device and input position detection method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009217854A (en) * | 2009-06-30 | 2009-09-24 | Wacom Co Ltd | Position detecting device |
| CN102520837A (en) * | 2011-12-02 | 2012-06-27 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic input device and electromagnetic input panel thereof |
| JP2012123848A (en) * | 2012-03-28 | 2012-06-28 | Wacom Co Ltd | Electronic apparatus and drawing operation method |
| CN103425377A (en) * | 2012-05-21 | 2013-12-04 | 汉王科技股份有限公司 | Coordinate correction method and device and electromagnetic touch-control device |
-
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- 2021-04-01 CN CN202110354907.8A patent/CN113238675A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009217854A (en) * | 2009-06-30 | 2009-09-24 | Wacom Co Ltd | Position detecting device |
| CN102520837A (en) * | 2011-12-02 | 2012-06-27 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic input device and electromagnetic input panel thereof |
| JP2012123848A (en) * | 2012-03-28 | 2012-06-28 | Wacom Co Ltd | Electronic apparatus and drawing operation method |
| CN103425377A (en) * | 2012-05-21 | 2013-12-04 | 汉王科技股份有限公司 | Coordinate correction method and device and electromagnetic touch-control device |
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