CN109753164B - Active pen, active pen touch control system and method - Google Patents
Active pen, active pen touch control system and method Download PDFInfo
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- CN109753164B CN109753164B CN201910032126.XA CN201910032126A CN109753164B CN 109753164 B CN109753164 B CN 109753164B CN 201910032126 A CN201910032126 A CN 201910032126A CN 109753164 B CN109753164 B CN 109753164B
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Abstract
The invention discloses an active pen, an active pen touch system and an active pen touch method. One embodiment of the active pen comprises: the pen comprises an active pen body, a main signal generator and a data processor, wherein the main signal generator and the data processor are arranged in a pen body of the active pen body; and the data processor is used for calculating to obtain a first compensation value according to the capacitance variation and the coordinate value fed back by the touch screen matched with the active pen based on the signals transmitted by the auxiliary signal generators, compensating the capacitance variation and the coordinate value fed back by the touch screen based on the signals transmitted by the main signal generator according to the first compensation value, and obtaining touch position information according to the capacitance variation and the coordinate value obtained after compensation. The implementation mode can realize high-precision anti-interference active pen touch control.
Description
Technical Field
The invention relates to the technical field of touch control. And more particularly, to an active pen, an active pen touch system and method.
Background
The touch screen can be operated by using a finger, and can also be operated by using a touch pen. The touch pen includes a passive pen and an active pen. When the passive pen is in contact with the touch screen, a small part of current flows into the passive pen from the touch point, which is equivalent to the change of the electrode capacitance at the touch point, and the control chip of the touch screen can determine the position of the touch point by detecting the change of the electrode capacitance. The nib of a passive pen is usually designed to be large. The active pen can transmit a driving signal to change an electric field at the touch point, so that the electrode capacitance at the touch point is changed, and the control chip of the touch screen can determine the position of the touch point by detecting the change of the electrode capacitance. The pen point of the active pen can be designed to be smaller. In addition, the active pen can also detect the pressure of the pen point by arranging a pressure sensor, so that writing handwriting with different thicknesses can be provided. Therefore, active pens have become the mainstream product.
The existing active pen cannot support the matching use with a large-size touch screen due to the limitation of anti-interference capability and touch precision, and the application environment of the active pen is limited and cannot be used in complex environments such as humidity, water stain and serious interference of electrical appliances.
Therefore, it is desirable to provide a new active pen, active pen touch system and method.
Disclosure of Invention
The present invention is directed to a novel active pen, an active pen touch system and a method thereof, which are used to solve at least one of the problems of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an active pen in a first aspect, which comprises an active pen body, a main signal generator and a data processor, wherein the main signal generator and the data processor are arranged in a pen body of the active pen body;
the data processor is used for calculating to obtain a first compensation value according to the capacitance variation and the coordinate value fed back by the touch screen matched with the active pen based on the signals transmitted by the auxiliary signal generators, compensating the capacitance variation and the coordinate value fed back by the touch screen based on the signals transmitted by the main signal generator according to the first compensation value, and obtaining touch position information according to the capacitance variation and the coordinate value obtained after compensation.
According to the active pen provided by the first aspect of the invention, the capacitance variation and the coordinate value fed back by the signal transmitted by the main signal generator are compensated by the first compensation value calculated according to the capacitance variation and the coordinate value fed back by the signal transmitted by each auxiliary signal generator respectively based on the touch screen, so that the precision of the obtained touch position can be improved, or the positioning precision can be improved, the sensitivity of the active pen is enhanced, the feasibility of the active pen in cooperation with a large-size touch screen is improved, and the feasibility of the active pen in use in complex environments such as moist environment, water stain environment and serious electric appliance interference environment is improved.
Optionally, the data processor is configured to calculate, according to the capacitance variation and the coordinate value fed back by the touch screen based on the signals transmitted by the auxiliary signal generators, a first compensation value by using a standard deviation formula.
Optionally, the data processor is further configured to calculate a second compensation value according to noise signals fed back by the touch screen based on signals transmitted by the auxiliary signal generators, compensate the noise signals fed back by the touch screen based on signals transmitted by the main signal generator according to the second compensation value, and obtain touch position information according to the compensated capacitance variation, noise signals, and coordinate values.
According to the optional mode, the noise signals fed back by the touch screen based on the signals transmitted by the main signal generator are compensated by the second compensation values calculated according to the noise signals fed back by the signals transmitted by the auxiliary signal generators respectively, so that the anti-interference performance of the active pen can be improved, the signal-to-noise ratio of the active pen is enhanced, the feasibility of the matched use of the active pen and a large-size touch screen can be further improved, and the feasibility of the use of the active pen in complex environments such as moist environment, water stain environment and serious electric appliance interference environment can be improved.
Optionally, the data processor is configured to calculate a second compensation value by using a standard deviation formula according to noise signals fed back by the touch screen based on signals transmitted by the auxiliary signal generators respectively.
Optionally, the data processor is further configured to identify random noise and determine whether waveforms of the random noise in the noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators overlap each other by comparing waveforms of the noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators, respectively, and if not, the random noise is regarded as white noise.
Because the conventional active pen directly compensates the periodic noise, the optional method identifies the random noise contained in the noise signal by comparing the waveforms of the noise signal, and further determines whether the random noise affects the noise signal fed back by the touch screen based on the signal transmitted by the main signal generator by judging whether the waveforms of the random noise in the noise signal fed back by the touch screen based on the signal transmitted by each auxiliary signal generator coincide with each other, if not, the random noise is sporadic random noise, and the noise signal fed back by the touch screen based on the signal transmitted by the main signal generator is not affected, so that the random noise is directly used as white noise and is not considered when the second compensation value is calculated.
Optionally, the plurality of secondary signal generators stagger the transmission signal with the primary signal generator at equal time intervals. That is, the plurality of sub signal generators have the same transmission frequency as the main signal generator, and the time intervals at which the signals are transmitted are equal. This optional mode does benefit to the precision that improves the touch-control position who obtains and promotes the interference immunity of initiative pen, does benefit to the sensitivity and the SNR of reinforcing initiative pen.
Optionally, the plurality of auxiliary signal generators are arranged in the pen body of the active pen body along the circumferential direction of the pen body of the active pen body. This optional mode does benefit to the precision that improves the touch-control position who obtains and promotes the interference immunity of initiative pen, does benefit to the sensitivity and the SNR of reinforcing initiative pen.
Optionally, the plurality of auxiliary signal generators are disposed in the pen body of the active pen body at a position close to the pen point of the active pen body. This optional mode does benefit to the intensity of the signal of the auxiliary signal generator transmission that reinforcing touch-sensitive screen received, and this optional mode does benefit to the precision that improves the touch-control position who obtains and promotes the interference immunity of initiative pen, does benefit to the sensitivity and the SNR of reinforcing initiative pen.
The second aspect of the invention provides an active pen touch system, which comprises a touch screen and the active pen provided by the first aspect of the invention.
The third aspect of the present invention provides an active pen touch method based on the active pen provided by the first aspect of the present invention, including:
calculating to obtain a first compensation value according to the capacitance variation and the coordinate value fed back by the touch screen based on the signals transmitted by the auxiliary signal generators;
and compensating the capacitance variation quantity and the coordinate value fed back by the touch screen based on the signal transmitted by the main signal generator according to the first compensation value, and acquiring touch position information according to the capacitance variation quantity and the coordinate value obtained after compensation.
The invention has the following beneficial effects:
according to the technical scheme, the accuracy of the obtained touch position can be improved, or the positioning accuracy can be improved, so that the sensitivity of the active pen is enhanced; and the anti-interference performance of the active pen can be improved, and the signal-to-noise ratio of the active pen is enhanced. Therefore, the high-precision anti-interference active pen is realized, the feasibility of the cooperation use of the active pen and a large-size touch screen is improved, and the feasibility of the use of the active pen in complex environments such as moist environment, water stain environment and serious electric appliance interference environment is improved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings;
fig. 1 is a schematic diagram illustrating an active pen in an active pen touch system according to an embodiment of the present invention.
Fig. 2 shows a schematic diagram of the arrangement of the auxiliary signal generator.
Fig. 3 shows a schematic diagram of a noise signal waveform.
Fig. 4 shows a flowchart of an active pen touch method according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
One embodiment of the present invention provides an active pen touch system, which includes a touch screen and an active pen as shown in fig. 1, wherein the active pen includes an active pen body 100, a main signal generator 101 and a data processor 102, which are disposed in a pen body of the active pen body 100, and a plurality of auxiliary signal generators 103, which are disposed in the pen body of the active pen body 100;
the data processor 102 is configured to calculate a first compensation value according to a capacitance variation and a coordinate value fed back by the touch screen used in cooperation with the active pen based on the signals transmitted by the auxiliary signal generators 103, respectively, compensate the capacitance variation and the coordinate value fed back by the touch screen based on the signals transmitted by the main signal generator 101 according to the first compensation value, and obtain touch position information according to the capacitance variation and the coordinate value obtained after compensation.
According to the active pen provided by the embodiment, the capacitance variation and the coordinate value fed back by the signal transmitted by the main signal generator 101 are compensated by the first compensation value calculated according to the capacitance variation and the coordinate value fed back by the signal transmitted by each auxiliary signal generator 103 on the basis of the touch screen, so that the accuracy of the obtained touch position can be improved, or the positioning accuracy can be improved, the sensitivity of the active pen is enhanced, the feasibility of the active pen in use with a large-size touch screen is improved, and the feasibility of the active pen in use in complex environments such as moist environment, water stain environment and serious electric appliance interference is improved.
It can be understood that the active pen provided in the present embodiment further includes a battery 104 disposed in the pen body of the active pen body 100, and a switch button 105 disposed on the pen body of the active pen body 100. After touch position information is obtained according to the compensated capacitance variation and the coordinate values, the active pen sends the touch position information obtained according to the compensated capacitance variation and the coordinate values to the touch screen.
In some optional implementations of the present embodiment, a plurality of auxiliary signal generators 103 are disposed in the body of the active pen body 100 along a circumferential direction of the body of the active pen body 100. The implementation mode is favorable for improving the precision of the obtained touch position and the anti-interference performance of the active pen, and is favorable for enhancing the sensitivity and the signal-to-noise ratio of the active pen.
In one specific example, as shown in fig. 2, the active pen includes ten auxiliary signal generators 103, and the ten auxiliary signal generators 103 uniformly arranged in the pen body of the active pen body 100 in the circumferential direction of the pen body of the active pen body 100 form an annular auxiliary signal generator group. It will be appreciated that although not shown, a support element such as a frame or strut may be provided in the active pen to fix the position of the ten secondary signal generators 103.
In some optional implementations of the present embodiment, the plurality of auxiliary signal generators 103 are disposed in the body of the active pen body 100 at a position close to the tip of the active pen body 100. This implementation mode does benefit to the intensity of the signal that auxiliary signal generator 103 that strengthens the touch-sensitive screen and receive launches, does benefit to the precision that improves the touch position who obtains and promotes the interference immunity of initiative pen, does benefit to the sensitivity and the SNR of reinforcing initiative pen.
In some optional implementation manners of this embodiment, the data processor 102 is configured to calculate, according to the capacitance variation and the coordinate value fed back by the touch screen based on the signal transmitted by each auxiliary signal generator 103, a first compensation value by using a standard deviation formula.
In one specific example, the active pen includes ten auxiliary signal generators 103, and the capacitance variation and the coordinate value fed back according to the touch screen based on the signals emitted by the auxiliary signal generators 103 are respectively (C)1，X1，Y1)，(C2，X2，Y2)，…(C10，X10，Y10) The first compensation value is (C)α，Xα，Yα) According to the first compensation value, the capacitance variation and the coordinate value fed back by the touch screen based on the signal emitted by the main signal generator 101 are compensated, namely according to the first compensation value (C)α，Xα，Yα) The capacitance variation and the coordinate value (C) fed back to the touch screen based on the signal emitted from the main signal generator 101 0，X0，Y0) Compensation is carried out, wherein C represents the change in capacitanceThe variables, X, Y, represent the X-axis coordinate value and the Y-axis coordinate value, respectively. In accordance with C1-C10Calculating by adopting a standard deviation formula to obtain CαFor example, the calculation formula is:
according to X1-X10Calculating to obtain XαAnd according to Y1-Y10Calculating to obtain YαSimilarly, the description is omitted here.
In some optional implementation manners of this embodiment, the data processor 102 is further configured to calculate a second compensation value according to noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators 103, respectively, compensate the noise signals fed back by the touch screen based on the signals transmitted by the main signal generator 101 according to the second compensation value, and obtain the touch position information according to the capacitance variation, the noise signals, and the coordinate values obtained after compensation.
According to the implementation mode, the noise signals fed back by the touch screen based on the signals transmitted by the main signal generator 101 are compensated by the second compensation values calculated according to the noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators 103, so that the anti-interference performance of the active pen can be improved, the signal-to-noise ratio of the active pen is enhanced, the feasibility of the matched use of the active pen and a large-size touch screen can be further improved, and the feasibility of the use of the active pen in complex environments such as moist environment, water stain environment and serious electric appliance interference environment can be improved.
In some optional implementation manners of this embodiment, the data processor 102 is configured to calculate a second compensation value by using a standard deviation formula according to noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators 103.
In the specific example where the active pen includes ten auxiliary signal generators 103, the capacitance variation, the noise signal, and the coordinate value fed back by the touch screen based on the signals emitted by the auxiliary signal generators 103 are (C)1，N1，X1，Y1)，(C2，N2，X2，Y2)，…(C10，N10，X10，Y10) The first compensation value and the second compensation value can be expressed as (C)α，Nα，Xα，Yα) According to the first compensation value, the capacitance variation and the coordinate value fed back by the touch screen based on the signal emitted by the main signal generator 101 are compensated, and according to the second compensation value, the noise signal fed back by the touch screen based on the signal emitted by the main signal generator 101 is compensated, namely according to (C)α，Nα，Xα，Yα) To (C)0，N0，X0，Y0) Compensation is performed, where N represents the noise signal. According to N1-N10Calculating to obtain NαAnd according to C1-C10Calculating to obtain CαSimilarly, no further description is provided herein.
In some optional implementation manners of this embodiment, the data processor 102 is further configured to identify random noise and determine whether waveforms of the random noise in the noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators 103 are overlapped by comparing waveforms of the noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators 103, respectively, and if not, the random noise is regarded as white noise. Or by a specific example in which the active pen comprises ten auxiliary signal generators 103, as shown in fig. 3, by comparing the noise signal N 1-N10The waveform comparison can identify N1-N10Respectively, with only the noise signal N1And N10Including random noise as an example, noise signal N1And N10Random noise contained does not coincide, so that the noise signal N1And N10The random noise contained is regarded as white noise and is not considered when calculating the second compensation value.
Because the conventional active pen has already performed direct compensation on the periodic noise, the implementation manner identifies the random noise contained in the noise signal through the waveform comparison of the noise signal, and further determines whether the random noise affects the noise signal fed back by the touch screen based on the signal transmitted by the main signal generator 101 by judging whether the waveforms of the random noise in the noise signal fed back by the signal transmitted by each auxiliary signal generator 103 are overlapped or not, if not, the random noise is accidental random noise, and the random noise does not affect the noise signal fed back by the touch screen based on the signal transmitted by the main signal generator 101, so that the random noise is directly used as white noise and is not considered when calculating the second compensation value.
In some alternative implementations of the present embodiment, the plurality of secondary signal generators 103 stagger the transmission signals with the primary signal generator 101 at equal time intervals. That is, the plurality of sub signal generators 103 have the same transmission frequency as the main signal generator 101, and the time intervals at which the signals are transmitted are equal. Still by way of specific example, the foregoing active pen includes ten auxiliary signal generators 103, the transmission frequencies of the ten auxiliary signal generators 103 and the main signal generator 101 are respectively 100Hz, and each auxiliary signal generator 103 sequentially transmits signals at a time interval of 1ms in an interval of two times of signal transmission by the main signal generator 101. The implementation mode is favorable for improving the precision of the obtained touch position and the anti-interference performance of the active pen, and is favorable for enhancing the sensitivity and the signal-to-noise ratio of the active pen.
As shown in fig. 4, another embodiment of the present invention provides an active pen touch method, including:
calculating to obtain a first compensation value according to the capacitance variation and the coordinate value fed back by the touch screen based on the signals transmitted by the auxiliary signal generators;
and compensating the capacitance variation quantity and the coordinate value fed back by the touch screen based on the signal transmitted by the main signal generator according to the first compensation value, and acquiring touch position information according to the capacitance variation quantity and the coordinate value obtained after compensation.
It should be noted that the principle and the working flow of the active pen touch method provided in this embodiment are similar to those of the active pen touch system, and reference may be made to the above description for relevant points, which are not described herein again.
It is to be noted that, in the description of the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention and are not intended to limit the embodiments of the present invention, and that various other modifications and variations can be made by one skilled in the art in light of the above description.
Claims (9)
1. An active pen comprises an active pen body, and a main signal generator and a data processor which are arranged in a pen body of the active pen body, and is characterized by further comprising a plurality of auxiliary signal generators arranged in the pen body of the active pen body;
the data processor is used for calculating to obtain a first compensation value according to capacitance variation and coordinate values fed back by the touch screen matched with the active pen respectively based on signals transmitted by the auxiliary signal generators, calculating to obtain a second compensation value according to noise signals fed back by the touch screen respectively based on signals transmitted by the auxiliary signal generators, compensating the capacitance variation and the coordinate values fed back by the touch screen based on the signals transmitted by the main signal generator according to the first compensation value, compensating the noise signals fed back by the touch screen based on the signals transmitted by the main signal generator according to the second compensation value, and obtaining touch position information according to the capacitance variation, the noise signals and the coordinate values obtained after compensation.
2. The active pen of claim 1, wherein the data processor is configured to calculate a first compensation value by using a standard deviation formula according to a capacitance variation and a coordinate value fed back by the touch screen based on the signals transmitted by the auxiliary signal generators, respectively.
3. The active pen of claim 1, wherein the data processor is configured to calculate a second compensation value according to a standard deviation formula based on noise signals fed back by the touch screen based on signals emitted by the auxiliary signal generators.
4. The active pen of claim 1, wherein the data processor is further configured to identify random noise and determine whether waveforms of the random noise in the noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators overlap each other by comparing waveforms of the noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators, respectively, and if not, the random noise is regarded as white noise.
5. The active pen of claim 1, wherein the plurality of secondary signal generators stagger the transmitted signals with the primary signal generator at equal time intervals.
6. The active pen of claim 1, wherein the plurality of secondary signal generators are disposed in the body of the active pen body in a circumferential direction of the body of the active pen body.
7. The active pen of claim 6, wherein the plurality of secondary signal generators are disposed in the body of the active pen body proximate to the tip of the active pen body.
8. Active pen touch system, characterized in that it comprises a touch screen and an active pen according to any of claims 1-7.
9. Active pen touch method based on an active pen according to any of claims 1-7, comprising:
calculating to obtain a first compensation value according to capacitance variation and coordinate values fed back by the touch screen based on signals transmitted by the auxiliary signal generators respectively, and calculating to obtain a second compensation value according to noise signals fed back by the touch screen based on the signals transmitted by the auxiliary signal generators respectively;
and compensating the capacitance variation quantity and the coordinate value fed back by the touch screen based on the signal transmitted by the main signal generator according to the first compensation value, compensating the noise signal fed back by the touch screen based on the signal transmitted by the main signal generator according to the second compensation value, and obtaining touch position information according to the capacitance variation quantity, the noise signal and the coordinate value obtained after compensation.
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| CN201910032126.XA CN109753164B (en) | 2019-01-14 | 2019-01-14 | Active pen, active pen touch control system and method |
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| CN201910032126.XA CN109753164B (en) | 2019-01-14 | 2019-01-14 | Active pen, active pen touch control system and method |
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| US8481872B2 (en) * | 2008-12-22 | 2013-07-09 | N-Trig Ltd. | Digitizer, stylus and method of synchronization therewith |
| US8638320B2 (en) * | 2011-06-22 | 2014-01-28 | Apple Inc. | Stylus orientation detection |
| US10296108B2 (en) * | 2015-07-06 | 2019-05-21 | Sigmasense, Llc. | Pen system with internal pressure tilt rotation |
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