CN209896777U - Double-coil antenna board and control circuit thereof - Google Patents
Double-coil antenna board and control circuit thereof Download PDFInfo
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- CN209896777U CN209896777U CN201920736262.2U CN201920736262U CN209896777U CN 209896777 U CN209896777 U CN 209896777U CN 201920736262 U CN201920736262 U CN 201920736262U CN 209896777 U CN209896777 U CN 209896777U
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Abstract
The double-coil antenna board control circuit comprises a transmitting coil array and a receiving coil array, wherein the receiving coil array and the transmitting coil array are arranged in the same surface area of the double-coil antenna board in an overlapped mode, and the double-coil antenna board control circuit further comprises a signal processing module. By adding the transmitting coil array only used for transmitting power signals externally and the receiving coil array only used for receiving input signals, the condition that the functions of coil transmitting and receiving are multiplexed is avoided, so that the simultaneous transmission and receiving of the signals are realized, sufficient transmitting power is provided to ensure the power supply of the stylus pen, the input signals can be stably received, data can be obtained from the received input signals for a long time, and the problems of insufficient transmitting power, unstable receiving signals and large generated data deviation in the traditional technical scheme are solved.
Description
Technical Field
The utility model belongs to the technical field of the antenna panel, especially, relate to a twin coil antenna panel and control circuit thereof.
Background
At present, the transmitting coil and the receiving coil of traditional antenna panel are same coil, but this kind of coil multiplexing's mode often can lead to antenna panel transmission and receive between the switching inefficiency, thereby cause the transmitting power of antenna panel not enough and received signal unstable, the transmitting power of antenna panel not enough can lead to the writing pen can't last the power supply, the received signal unstable of antenna panel can cause the antenna panel can't guarantee to calculate sinusoidal wave signal frequency for a long time, thereby it is big to cause the data to calculate the deviation.
Therefore, the conventional technical scheme has the problems of insufficient transmission power, unstable received signals and large generated data deviation.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a dual-coil antenna board and a control circuit thereof, which aims to solve the problems of insufficient transmission power, unstable received signal and large data calculation deviation existing in the conventional technical solution.
The utility model provides a first aspect of the embodiment provides a twin coil antenna panel control circuit, a serial communication port, include: a transmitting coil array configured to transmit a power signal to the outside; the receiving coil array and the transmitting coil array are arranged on the same surface area of the double-coil antenna plate in an overlapping mode, and the receiving coil array is arranged for receiving input signals; and the input end of the signal processing module is connected with the receiving coil array, the first output end of the signal processing module is connected with the transmitting coil array, the second output end of the signal processing module is connected with an upper computer, the signal processing module is set to extract the input signal, convert the input signal into data information and transmit the data information to the upper computer and generate the power signal and transmit the data signal to the transmitting coil array.
In one embodiment, the receiving coil array includes at least one receiving coil set arranged along a first direction and at least one receiving coil set arranged along a second direction different from the first direction, and each receiving coil set arranged along the first direction is respectively intersected with each receiving coil set arranged along the second direction.
In one embodiment, each receiving coil group comprises more than seven receiving coils arranged side by side, and adjacent receiving coils in the group are crossed with each other.
In one embodiment, in each receiving coil group, the m-th receiving coil is crossed with the m-2 th receiving coil, the m-1 st receiving coil, the m +1 th receiving coil and the m +2 th receiving coil, and m is larger than or equal to 3.
In one embodiment, the transmitting coil array comprises more than two transmitting coils arranged side by side along the third direction, and the adjacent transmitting coils are crossed with each other.
In one embodiment, the signal processing module comprises: a signal extraction unit, an input end of the signal extraction unit being connected to the receive coil array, the signal extraction unit being configured to extract the input signal and convert the input signal into a first signal and a second signal; the first input end of the data processing unit is connected with the first output end of the signal extraction unit, the second input end of the data processing unit is connected with the second output end of the signal extraction unit, and the data processing unit is set to generate an excitation signal for controlling the power signal to generate, generate the data information according to the first signal and the second signal and transmit the data information to the upper computer; and the input end of the power signal generating unit is connected with the first output end of the data processing unit, the output end of the power signal generating unit is connected with the transmitting coil array, and the power signal generating unit generates the power signal according to the excitation signal and transmits the power signal to the transmitting coil array.
In one embodiment, the signal extraction unit includes: the coil selection subunit is connected with the receiving coil array and the data processing unit and is set to gate a target coil of the receiving coil array and output an input signal received by the target coil under the control of the data processing unit; the input end of the signal amplification subunit is connected with the output end of the coil selection subunit, and the signal amplification subunit is used for amplifying the input signal and outputting an amplified input signal; the filtering subunit is connected with the signal amplifying subunit and is configured to filter high-frequency interference signals in the amplified input signals and output target input signals; a first conversion subunit connected to the filtering subunit, the first conversion subunit being configured to convert the target input signal into a first signal; and a second conversion subunit configured to convert the target input signal into a second signal.
In one embodiment, the coil selection subunit includes a one-out-of-multiple analog switch chip, a plurality of input branch ends of the one-out-of-multiple analog switch chip are connected with the receiving coil array, a control end and an address end of the one-out-of-multiple analog switch chip are connected with the data processing unit, a common input end of the one-out-of-multiple analog switch chip is an output end of the coil selection subunit, and the one-out-of-multiple analog switch chip is configured to gate channels of the target coil and the signal amplification subunit under the control of the data processing unit.
In one embodiment, the first conversion subunit comprises: the target input signal is connected to the anode of the first diode, the cathode of the first diode is connected with the first end of the first resistor, the second end of the first resistor is connected with the first input end of the first amplifier, the first end of the first capacitor and the source electrode of the first switch tube, the second input end of the first amplifier is grounded through the second resistor, the control end of the first switch tube is connected with the data processing unit, the drain electrode of the first switch tube is connected with the second end of the first capacitor, the output end of the first amplifier and the first end of the third resistor, and the second end of the third resistor is the output end of the first conversion subunit.
In one embodiment, the second conversion subunit includes: the first end of the fourth resistor is connected to the target input signal, the second end of the fourth resistor is connected to the second input end of the second amplifier, the first input end of the second amplifier is connected to the first end of the fifth resistor and the first end of the sixth resistor, the second end of the fifth resistor is grounded, the second end of the sixth resistor and the output end of the second amplifier are connected to the input end of the schmitt trigger, and the output end of the schmitt trigger is the output end of the second converter subunit.
In one embodiment, the power signal generating unit includes a third amplifier, a control terminal of the third amplifier is connected to the data processing unit, an input terminal of the third amplifier is connected to the data processing unit, and an output terminal of the third amplifier is connected to the transmitting coil array.
A second aspect of the embodiments of the present invention provides a dual coil antenna panel, including the aforementioned dual coil antenna panel control circuit.
According to the double-coil antenna board control circuit, the transmitting coil array only used for transmitting power signals externally and the receiving coil array only used for receiving input signals are added, the multiplexing condition of coil transmitting and receiving functions is avoided, the simultaneous transmission and receiving of the signals are achieved, sufficient transmitting power is provided to guarantee the power supply of the stylus pen, the input signals can be stably received, data can be obtained from the received input signals for a long time, and the problems that the transmitting power is insufficient, the received signals are unstable and the generated data deviation is large in the traditional technical scheme are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic circuit diagram of a dual-coil antenna board control circuit according to an embodiment of the present invention;
figure 2 is an exemplary electrical schematic diagram of a transmit coil array and a receive coil array of the dual-coil antenna panel control circuit shown in figure 1;
fig. 3 is a schematic diagram of an exemplary circuit of a signal processing module in the dual-coil antenna board control circuit shown in fig. 1;
FIG. 4 is an exemplary circuit schematic of a signal extraction unit in the signal processing module shown in FIG. 3;
FIG. 5 is an exemplary circuit schematic of a coil selection subunit in the signal extraction unit shown in FIG. 4;
FIG. 6 is an exemplary circuit schematic of a first conversion subunit of the signal extraction unit shown in FIG. 4;
fig. 7 is a schematic diagram of an exemplary circuit of a second conversion subunit in the signal extraction unit shown in fig. 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a circuit diagram of a dual-coil antenna board control circuit according to an embodiment of the present invention is shown, for convenience of description, only the portions related to the embodiment are shown, and detailed descriptions are as follows:
a double-coil antenna plate control circuit comprises a transmitting coil array 100, a receiving coil array 200 and a signal processing module 300, wherein the receiving coil array 200 and the transmitting coil array 100 can be arranged in the same surface area of a double-coil antenna plate in an overlapping mode, the input end of the signal processing module 300 is connected with the receiving coil array 200, the first output end of the signal processing module 300 is connected with the transmitting coil array 100, and the second output end of the signal processing module 300 is connected with an upper computer 400; the transmitting coil array 100 is configured to transmit power signals to the outside, the receiving coil array 200 is configured to receive input signals, and the signal processing module 300 is configured to extract the input signals, convert the input signals into data information, transmit the data information to the upper computer 400, generate power signals, and transmit the power signals to the transmitting coil array 100.
It should be understood that the transmitting coil array 100 includes a plurality of transmitting coils, each transmitting coil being arranged in a crossed and/or staggered manner in a certain order; the receiving coil array 200 comprises a plurality of receiving coils, wherein the receiving coils are arranged in a crossed manner and/or a staggered manner in a certain order; the signal processing module 300 may be comprised of one or more chips or integrated circuits that are equipped with signal extraction, data processing, and signal generation.
The dual-coil antenna board control circuit in the embodiment avoids the multiplexing of the transmitting and receiving functions of the coil by adding the transmitting coil array 100 only used for transmitting power signals externally and the receiving coil array 200 only used for receiving input signals, thereby realizing the simultaneous transmission and receiving of the signals, providing sufficient transmitting power to ensure the power supply of the stylus pen, stably receiving the input signals and acquiring data from the received input signals for a long time, and solving the problems of insufficient transmitting power, unstable received signals and large generated data deviation in the traditional technical scheme.
In one embodiment, the receiving coil array 100 includes at least one receiving coil set arranged along a first direction and at least one receiving coil set arranged along a second direction different from the first direction, and each receiving coil set arranged side by side along the first direction respectively intersects with each receiving coil set arranged side by side along the second direction. It should be understood that when the receiving coil array 100 includes more than two receiving coil sets arranged along a first direction and/or more than two receiving coil sets arranged along a second direction different from the first direction, the more than two receiving coil sets arranged along the same direction may be arranged side by side.
In one embodiment, two or more receiving coil sets in the same direction are arranged side by side, and adjacent receiving coil sets are spaced by a gap, that is: when the receiving coil array 100 includes more than two receiving coil groups arranged side by side along the first direction, the receiving coil groups arranged side by side along the first direction may be separated by a gap; when the receiving coil array 100 includes more than two receiving coil groups arranged side by side in the second direction, the respective receiving coil groups arranged side by side in the second direction may be separated by a gap. It should be understood that in other embodiments, there may be no gap isolation between adjacent sets of receive coils in the same side-by-side arrangement.
In one embodiment, each receiver coil group comprises more than seven receiver coils arranged side by side, and adjacent receiver coils in the group are crossed with each other. Optionally, in each receiving coil group, the mth receiving coil intersects with the (m-2) th receiving coil, the (m-1) th receiving coil, the (m + 1) th receiving coil and the (m + 2) th receiving coil, and m is greater than or equal to 3.
To facilitate understanding, one of the cases is exemplified as follows, referring to fig. 2, and in one embodiment, the receiving coil array 100 includes: the X-axis receiving coil group and the Y-axis receiving coil group are arranged in parallel along a first direction which is an X-axis direction, and the Y-axis receiving coil group and the X-axis receiving coil group are arranged in parallel along a second direction which is a Y-axis direction, wherein the X-axis receiving coil group comprises more than seven X-axis receiving coils arranged in parallel, the Y-axis receiving coil group comprises more than seven Y-axis receiving coils arranged in parallel, the mth X-axis coil and the m-2X-axis coil, the m-1X-axis coil, the m + 1X-axis coil and the m + 2X-axis coil in the X-axis receiving coil group are arranged in a staggered mode, and m is larger than or equal to 3; the m-th Y-axis coil, the m-2-th Y-axis coil, the m-1-th Y-axis coil, the m + 1-th Y-axis coil and the m + 2-th Y-axis coil in the Y-axis receiving coil group are arranged in a staggered mode, and m is larger than or equal to 3.
In the receiving coil array 100 in this embodiment, seven or more receiving coils are arranged in each receiving coil group side by side and the coils are arranged in a crossed manner according to a certain rule, so that the input signal is received more accurately and the signal processing module 300 is easy to extract the input signal accurately and convert the input signal into data information.
In one embodiment, the transmitting coil array 100 includes more than two transmitting coils arranged side by side along the third direction, and adjacent transmitting coils are crossed with each other.
It is to be understood that the third direction may be the same direction as the first direction or the second direction, or may be a direction different from the first direction and the second direction. In a plane, each transmitting coil is crossed with a respective receiving coil group which is arranged side by side along the first direction and/or the second direction.
It should be understood that each transmitting coil in the transmitting coil array 100 may be arranged in a regular crossing manner, for the convenience of understanding, one of the arrangement cases is as follows, referring to fig. 2, in one embodiment, the transmitting coil array 100 includes more than two transmitting coils arranged side by side along the third direction, the nth transmitting coil and the n-1 transmitting coil are arranged in a crossing manner, that is: the 1 st transmitting coil and the 2 nd transmitting coil are arranged in a crossed manner; the 2 nd transmitting coil, the 1 st transmitting coil and the 3 rd transmitting coil are arranged in a crossed manner, and the 3 rd transmitting coil, the 2 nd transmitting coil and the 4 th transmitting coil are arranged in a crossed manner; by analogy, the nth transmitting coil, the (n-1) th transmitting coil and the (n + 1) th transmitting coil are arranged in a crossed mode, and n is larger than or equal to 3.
Referring to fig. 3, in one embodiment, the signal processing module 300 includes: the signal processing system comprises a signal extraction unit 310, a data processing unit 320 and a power signal generation unit 330, wherein the input end of the signal extraction unit 310 is connected with the receiving coil array 200, the first input end of the data processing unit 320 is connected with the first output end of the signal extraction unit 310, the second input end of the data processing unit 320 is connected with the second output end of the signal extraction unit 310, the input end of the power signal generation unit 330 is connected with the first output end of the data processing unit 320, the output end of the power signal generation unit 330 is connected with the transmitting coil array 100, the signal extraction unit 310 is arranged to extract an input signal and convert the input signal into a first signal and a second signal, the data processing unit 320 is arranged to generate an excitation signal for controlling power signal generation, generate data information according to the first signal and the second signal and transmit the data information to an upper computer 400; the power signal generating unit 330 generates a power signal according to the excitation signal and transmits to the transmitting coil array 100.
The first signal may be an amplitude signal and the second signal may be an interrupt signal; the signal extraction unit 310 may be composed of a switching chip, a filter device, an amplification device, and the like; the data processing unit 320 may be composed of a chip having functional modules such as an analog-to-digital converter, an interrupt calculator, and a pulse generator, for example, an 80C51 series single chip microcomputer; the power signal generating unit 330 may be composed of a multi-stage amplifying circuit.
Referring to fig. 4, in one embodiment, the signal extraction unit 310 includes: a coil selection subunit 311, a signal amplification subunit 312, a filtering subunit 313, a first converting subunit 314, and a second converting subunit 315, wherein the coil selecting subunit 311 is connected to the receiving coil array 200 and the data processing unit 320, an input end of the signal amplifying subunit 312 is connected to an output end of the coil selecting subunit 311, the filtering subunit 313 is connected to the signal amplifying subunit 312, the first converting subunit 314 is connected to the filtering subunit 313, the coil selecting subunit 311 is configured to gate a target coil of the receiving coil array 200 and output an input signal received by the target coil under the control of the data processing unit 320, the signal amplifying subunit 312 is configured to amplify the input signal and output the amplified input signal, the filtering subunit 313 is configured to filter a high-frequency interference signal in the amplified input signal and output the target input signal, and the first converting subunit 314 is configured to convert the target input signal into a first signal; the second conversion subunit 315 is arranged to convert the target input signal into a second signal.
It should be understood that the coil selection subunit 311 may be formed by a chip or a device that is turned on or off by a control signal, such as a multiplexer, a multi-selection analog switch chip, or a switch tube array formed by a plurality of switch tubes; the signal amplification subunit 312 may be composed of a multi-stage amplification circuit composed of a plurality of amplifiers; the filtering subunit 313 may be formed by a high-pass filter and/or a low-pass filter formed by a capacitor, a resistor, an amplifier, and the like, and the filtering subunit 313 may filter interference of a high-frequency power signal emitted by the transmitting coil array, and the like; the first conversion subunit 314 is constituted by an integrating circuit, and the second conversion subunit 315 may be constituted by a flip-flop or the like.
Referring to fig. 5, in an embodiment, the coil selection subunit 311 includes a one-out-of-multiple analog switch chip U1, a plurality of input ports of the one-out-of-multiple analog switch chip U1 are connected to the receiving coil array 200, a control port and an address port of the one-out-of-multiple analog switch chip U1 are connected to the data processing unit 320, a common input port of the one-out-of-multiple analog switch chip U1 is an output port of the coil selection subunit 311, and the one-out-of-multiple analog switch chip U1 is configured to gate channels of the target coil and the signal amplification subunit 312 under the control of the data processing unit 320.
The operation of one of the coil selection subunits 311 in this embodiment can be as follows:
the method comprises the following steps: the data processing unit 320 issues address codes to the address terminal of the one-out-of-multiple analog switch chip U1 according to a certain rule, for example, in a descending order, or in a forward order or a reverse order after assigning any address code, and the like;
step two: after the input signals of the coils gated by the one-out-of-multiple analog switch chip U1 are transmitted to the data processing unit 320 through the signal amplification subunit 312, the filtering subunit 313, the first conversion subunit 314 and/or the second conversion subunit 315, the data processing unit 320 compares the received input signals of the coils and determines the target address codes of the coils corresponding to one or more input signals with the highest signal intensity;
step three: the data processing unit 320 sends the target address code to the one-out-of-multiple analog switch chip U1, and the one-out-of-multiple analog switch chip U1 re-gates the target coil according to the target address code.
It should be understood that step three may be eliminated.
Referring to fig. 6, in one embodiment, the first converting subunit 314 includes: the first diode D1, the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the first switch tube Q1 and the first amplifier U2, the anode of the first diode D1 is connected to a target input signal, the cathode of the first diode D1 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first input end of the first amplifier U2, the first end of the first capacitor C1 and the source of the first switch tube Q1, the second input end of the first amplifier U2 is grounded through the second resistor R2, the control end of the first switch tube Q1 is connected to the data processing unit 320, the drain of the first switch tube Q1 is connected to the second end of the first capacitor C1, the output end of the first amplifier U2 and the first end of the third resistor R3, and the first end of the third resistor R3 is the output end of the first switch sub-unit 314.
It should be understood that in the present embodiment, the first input terminal of the first amplifier U2 is the negative input terminal of the first amplifier U2, and the second input terminal of the first amplifier U2 is the positive input terminal of the first amplifier U2, and in other embodiments, other types of amplifiers may be used.
In the first converting subunit 314 of this embodiment, an integrating circuit is formed by adding a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first switch tube Q1, and a first amplifier U2, after an input target input signal passes through a first diode D1, a negative half-axis signal is filtered out, and only a positive half-axis signal is left and is transmitted to the integrating circuit, and the data processing unit 320 controls the timing of the integrating circuit by controlling the on/off of the first switch tube Q1, so as to obtain the integrated amplitude of the target input signal input by each coil.
Referring to fig. 7, in one embodiment, the second converting subunit 315 includes: a second amplifier U3, a schmitt trigger J1, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, wherein a first end of the fourth resistor R4 is connected to a target input signal, a second end of the fourth resistor R4 is connected to a second input end of the second amplifier U3, a first input end of the second amplifier U3 is connected to a first end of the fifth resistor R5 and a first end of the sixth resistor R6, a second end of the fifth resistor R5 is grounded, a second end of the sixth resistor R6 and an output end of the second amplifier U3 are connected to an input end of the schmitt trigger J1, and an output end of the schmitt trigger J1 is an output end of the second converter unit 315.
It should be appreciated that in this embodiment, the first input of the second amplifier U3 is the negative input of the second amplifier U3, and the second input of the second amplifier U3 is the positive input of the second amplifier U3, and in other embodiments, other types of amplifiers may be used.
The second converting subunit 315 in this embodiment converts the target input signal into a second signal by adding a schmitt trigger J1, and it should be understood that the second signal generated by passing through the schmitt trigger J1 is an interrupted square wave signal or an interrupted rectangular wave signal; and a second amplifier U3 is added to amplify a target input signal and then input the target input signal to the Schmitt trigger J1, so that the Schmitt trigger J1 can be triggered finally for the input signal received by any coil, and it should be understood that in order to ensure that the input signal received by any coil can trigger the Schmitt trigger J1 finally, an amplifier and a filter can be added as required to complete multistage filtering and multistage amplification.
In one embodiment, the power signal generating unit 330 includes a third amplifier, a control terminal of the third amplifier is connected to the data processing unit 320, an input terminal of the third amplifier is connected to the data processing unit 320, and an output terminal of the third amplifier is connected to the transmitting coil array 100.
It should be understood that the output of one third amplifier may be connected to each transmitting coil in the transmitting coil array 100 one by one; or a plurality of third amplifiers form an amplifier circuit, and the output ends of the third amplifiers are connected with the transmitting coils in the transmitting coil array 100 one by one; a third amplifier composed of an amplifier chip including a plurality of output terminals may also be employed, and the plurality of output terminals of the third amplifier are connected to the respective transmitting coils in the transmitting coil array 100 one by one.
A second aspect of the embodiments of the present invention provides a dual-coil antenna board, including the dual-coil antenna board control circuit as described above.
For easy understanding, briefly described the utility model discloses a working process of twin coil antenna board as follows:
the method comprises the following steps: the data processing unit 320 transmits the excitation signal to the power signal generating unit 330; wherein the excitation signal may be a high frequency pulse signal.
Step two: the power signal generating unit 330 amplifies the excitation signal into a power signal of the same frequency and transmits the power signal to the outside through the transmitting coil array 100;
it should be understood that when the twin coil antenna board and the electromagnetic pen match each other and work, then the receiving terminal of power signal is the electromagnetic pen, and when the electromagnetic pen was close transmitting coil array 100, the electromagnetic pen internal circuit received the transmission power signal and formed resonance with transmitting coil array 100 to convert power signal into the signal of telecommunication, and then realize the power supply to the electromagnetic pen internal circuit.
Step three: after the receiving coil array 200 receives the input signal, the data processing unit 320 gates the receiving coils of the receiving coil groups of the receiving coil array 200 one by one through the coil selection subunit 311.
It should be understood that the data processing unit 320 may gate the respective coils by issuing address codes to the coil selection subunit 311 according to a certain rule, for example, in a descending order, or in a forward order or a reverse order after specifying any one address code, and the like.
Step four: the input signals of the receiving coils of each receiving coil group in the receiving coil array 200 pass through the coil selection subunit 311, the signal amplification subunit 312 and the filtering subunit 313 one by one to obtain corresponding target input signals;
it will be appreciated that the input signal may be a low frequency sine wave signal transmitted by the electromagnetic pen, when powered, to the dual coil antenna board.
Step five: each target input signal is converted into a first signal through the first conversion subunit 314 one by one and input into the data processing unit 320, and the data processing unit 320 selects a target receiving coil of each receiving coil group according to the received first signal input by each coil and converts the target receiving coil into first data information;
it should be understood that the data processing unit 320 may select the target receiving coil of each receiving coil set according to the received first signal input by each coil: the data processing unit 320 selects the target receiving coil of each receiving coil group according to the determination of comparing the signal strength of each first signal input by the target receiving coil of each receiving coil group, for example, if the sender of the input signal is an electromagnetic pen, the closer the electromagnetic pen is to a certain coil, the stronger the input signal received by the certain coil, and the stronger the converted first signal.
It should be understood that the first data information may be physical coordinate information.
Step six: each target input signal is converted into a second signal through the second conversion subunit 315 and input to the data processing unit 320, and the data processing unit 320 converts the second signal into second data information;
it should be understood that the second signal may be an interrupt signal, and the second data information may be frequency information, pressure information, etc., for example, if the sender of the input signal is an electromagnetic pen, the oscillation frequency change of the electromagnetic pen is proportional to the pressure change, the frequency change of the input signal is proportional to the pressure change, the data processing unit 320 may convert the received second signal into frequency information, and then convert the pressure information according to the frequency information or input the frequency information to the upper computer 400 and convert the pressure information by the upper computer 400.
Step seven: the data processing unit 320 integrates the first data information and the second data information and transmits the integrated data information to the upper computer 400.
It should be understood that the data processing unit 320 may transmit the first data information and the second data information to the upper computer 400 through a serial interface such as a USB interface, or bluetooth and/or WIFI, or the like.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (12)
1. A dual-coil antenna board control circuit, comprising:
a transmitting coil array configured to transmit a power signal to the outside;
the receiving coil array and the transmitting coil array are arranged on the same surface area of the double-coil antenna plate in an overlapping mode, and the receiving coil array is arranged for receiving input signals; and
the input end of the signal processing module is connected with the receiving coil array, the first output end of the signal processing module is connected with the transmitting coil array, the second output end of the signal processing module is connected with an upper computer, the signal processing module is set to extract the input signal and convert the input signal into data information to be transmitted to the upper computer and generate the power signal and transmit the power signal to the transmitting coil array.
2. The dual-coil antenna board control circuit as claimed in claim 1, wherein the receive coil array includes at least one set of receive coils disposed in a first direction and at least one set of receive coils disposed in a second direction different from the first direction, each set of receive coils disposed in the first direction being respectively interdigitated with a respective set of receive coils disposed in the second direction.
3. The dual-coil antenna board control circuit as claimed in claim 2, wherein each of the receiver coil groups includes more than seven receiver coils arranged side by side, and adjacent ones of the receiver coils in a group are crossed with each other.
4. The dual-coil antenna board control circuit according to claim 3, wherein in each of the receiving coil groups, the m-th receiving coil crosses the m-2 th receiving coil, the m-1 th receiving coil, the m +1 th receiving coil, and the m +2 th receiving coil, and m ≧ 3.
5. The dual-coil antenna board control circuit according to any one of claims 2 to 4, wherein the transmit coil array includes two or more transmit coils arranged side by side in the third direction, and adjacent transmit coils cross each other.
6. The dual-coil antenna board control circuit of claim 1, wherein the signal processing module comprises:
a signal extraction unit, an input end of the signal extraction unit being connected to the receive coil array, the signal extraction unit being configured to extract the input signal and convert the input signal into a first signal and a second signal;
the first input end of the data processing unit is connected with the first output end of the signal extraction unit, the second input end of the data processing unit is connected with the second output end of the signal extraction unit, and the data processing unit is set to generate an excitation signal for controlling the power signal to generate, generate the data information according to the first signal and the second signal and transmit the data information to the upper computer; and
the input end of the power signal generating unit is connected with the first output end of the data processing unit, the output end of the power signal generating unit is connected with the transmitting coil array, and the power signal generating unit generates the power signal according to the excitation signal and transmits the power signal to the transmitting coil array.
7. The dual-coil antenna board control circuit as claimed in claim 6, wherein the signal extraction unit comprises:
the coil selection subunit is connected with the receiving coil array and the data processing unit and is set to gate a target coil of the receiving coil array and output an input signal received by the target coil under the control of the data processing unit;
the input end of the signal amplification subunit is connected with the output end of the coil selection subunit, and the signal amplification subunit is used for amplifying the input signal and outputting an amplified input signal;
the filtering subunit is connected with the signal amplifying subunit and is configured to filter high-frequency interference signals in the amplified input signals and output target input signals;
a first conversion subunit connected to the filtering subunit, the first conversion subunit being configured to convert the target input signal into a first signal; and
a second conversion subunit configured to convert the target input signal into a second signal.
8. The dual-coil antenna board control circuit according to claim 7, wherein the coil selection subunit includes a one-out-of-multiple analog switch chip, a plurality of input branch terminals of the one-out-of-multiple analog switch chip are connected to the receiving coil array, a control terminal and an address terminal of the one-out-of-multiple analog switch chip are connected to the data processing unit, a common input terminal of the one-out-of-multiple analog switch chip is an output terminal of the coil selection subunit, and the one-out-of-multiple analog switch chip is configured to gate channels of the target coil and the signal amplification subunit under control of the data processing unit.
9. The dual-coil antenna board control circuit of claim 7, wherein the first converting subunit comprises: the target input signal is connected to the anode of the first diode, the cathode of the first diode is connected with the first end of the first resistor, the second end of the first resistor is connected with the first input end of the first amplifier, the first end of the first capacitor and the source electrode of the first switch tube, the second input end of the first amplifier is grounded through the second resistor, the control end of the first switch tube is connected with the data processing unit, the drain electrode of the first switch tube is connected with the second end of the first capacitor, the output end of the first amplifier and the first end of the third resistor, and the second end of the third resistor is the output end of the first conversion subunit.
10. The dual-coil antenna board control circuit as recited in claim 7, wherein the second converting subunit comprises: the first end of the fourth resistor is connected to the target input signal, the second end of the fourth resistor is connected to the second input end of the second amplifier, the first input end of the second amplifier is connected to the first end of the fifth resistor and the first end of the sixth resistor, the second end of the fifth resistor is grounded, the second end of the sixth resistor and the output end of the second amplifier are connected to the input end of the schmitt trigger, and the output end of the schmitt trigger is the output end of the second converter subunit.
11. The dual-coil antenna board control circuit as claimed in claim 6, wherein the power signal generating unit includes a third amplifier, a control terminal of the third amplifier is connected to the data processing unit, an input terminal of the third amplifier is connected to the data processing unit, and an output terminal of the third amplifier is connected to the transmitting coil array.
12. A dual-coil antenna panel, comprising a dual-coil antenna panel control circuit as claimed in any of claims 1-11.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920736262.2U CN209896777U (en) | 2019-05-21 | 2019-05-21 | Double-coil antenna board and control circuit thereof |
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| CN201920736262.2U CN209896777U (en) | 2019-05-21 | 2019-05-21 | Double-coil antenna board and control circuit thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212651A (en) * | 2019-05-21 | 2019-09-06 | 深圳市优笔触控科技有限公司 | Twin coil antenna plate and its control circuit |
| CN113686230A (en) * | 2021-09-06 | 2021-11-23 | 深圳市绘王动漫科技有限公司 | Method, device and system for solving quick scribing and breaking |
-
2019
- 2019-05-21 CN CN201920736262.2U patent/CN209896777U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212651A (en) * | 2019-05-21 | 2019-09-06 | 深圳市优笔触控科技有限公司 | Twin coil antenna plate and its control circuit |
| CN110212651B (en) * | 2019-05-21 | 2024-04-05 | 深圳市优笔触控科技有限公司 | Dual-coil antenna board and control circuit thereof |
| CN113686230A (en) * | 2021-09-06 | 2021-11-23 | 深圳市绘王动漫科技有限公司 | Method, device and system for solving quick scribing and breaking |
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