CN108934180B - Capacitance pen system, capacitance pen and capacitance pen control circuit - Google Patents
Capacitance pen system, capacitance pen and capacitance pen control circuit Download PDFInfo
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- CN108934180B CN108934180B CN201780000199.XA CN201780000199A CN108934180B CN 108934180 B CN108934180 B CN 108934180B CN 201780000199 A CN201780000199 A CN 201780000199A CN 108934180 B CN108934180 B CN 108934180B
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Abstract
A capacitive stylus system, a capacitive stylus and a capacitive stylus control circuit, the capacitive stylus system comprising: a capacitance pen (1) and an electronic device (2); the capacitance pen (1) comprises an active electrode module (101), a passive sensing module (102), a first control module (103) and a first wireless communication module (104), wherein the active electrode module (101) comprises an active electrode, and the passive sensing module (102) comprises a passive electrode; the electronic device (2) comprises a touch position detection module (201), a second control module (202), a second wireless communication module (203) and an operation execution module (204). By adding the passive induction module (102) at the pen tail of the capacitive pen (1), the erasing operation intention of a user can be obtained at the pen end of the capacitive pen, the erasing operation intention is sent to the electronic equipment (2) through the wireless communication module (104), the erasing operation is executed, an active sending module is not required to be arranged at the pen tail of the capacitive pen (1), the structural design can be simplified, the product cost is saved, and meanwhile, the power consumption is reduced.
Description
Technical Field
The embodiment of the invention belongs to the field of capacitance pens, and particularly relates to a capacitance pen system, a capacitance pen and a capacitance pen control circuit.
Background
The active capacitive pen is gradually receiving attention from the market as a main peripheral input accessory of an electronic device with a touch screen. In addition to writing new content normally, users also have a need to erase existing content during the process of using the active capacitance pen.
The erasing function of the active capacitive pen in the current market is mainly realized in two ways:
the first mode is realized based on the software of electronic equipment end, under this condition, active electric capacity pen only passes through nib transmission signal, active electric capacity pen and electronic equipment all can't discern the current intention of user through the nib signal and write or erase, when the nib signal of active electric capacity pen defaulted under the condition of writing the mode, if there is the demand of erasing, the mode of writing is switched into and erases the mode through the software setting of electronic equipment end, the nib signal of active electric capacity pen is used for erasing the operation this moment, after erasing the completion, switch to normal writing mode again. The implementation method does not need the special treatment of the active capacitance pen, and the universal active capacitance pen can support the operation method, but the mode needs to be manually switched in the operation process, so that the user experience is influenced.
The second mode is that the active capacitance pen end firstly identifies the user erasing action intention, under the condition, only a pen point and a pen tail of the active capacitance pen can transmit signals, wherein the pen tail signals are different from pen point signals, and the electronic equipment identifies whether the signals are writing signals or erasing signals according to the characteristics of the pen tail signals and the pen point signals; a typical mode is that a pen point and a pen tail are respectively provided with an emitting electrode to realize writing and erasing functions, when a user turns a pen body upside down, the pen tail contacts a screen of the electronic device to use the erasing function, the electronic device detects a pen tail signal, and the frequencies of the emitting signals of the pen point electrode and the pen cap electrode are different, so that the electronic device can conveniently identify the writing or erasing action intention of the user. This approach will increase power consumption and product cost due to the two signal transmitting terminals on the active capacitive stylus.
Disclosure of Invention
In order to solve the above problems, embodiments of the present invention provide a capacitive pen system, a capacitive pen, and a capacitive pen control circuit.
In a first aspect, an embodiment of the present invention provides a capacitive pen system, where the capacitive pen system includes:
a capacitance pen and an electronic device;
the capacitive pen comprises an active electrode module, a passive induction module, a first control module and a first wireless communication module, wherein the active electrode module comprises an active electrode, and the passive induction module comprises a passive electrode;
the electronic equipment comprises a touch position detection module, a second control module, a second wireless communication module and an operation execution module;
the touch position detection module detects an electric signal emitted by the active electrode, and the second control module determines the position coordinate of a contact point of the active electrode and the electronic equipment and controls the operation execution module to execute writing or clicking operation;
the touch position detection module detects touch of the passive electrode, the second control module determines the position coordinate of the passive electrode and the contact point of the electronic equipment, the passive induction module detects pressure applied to the passive electrode, the first control module controls the first wireless communication module to send a pressure detection result to the second wireless communication module and transmit the pressure detection result to the second control module, and the second control module controls the operation execution module to execute erasing operation according to the position coordinate and the pressure detection result.
Optionally, the passive sensing module comprises one of the following pressure sensors: piezoresistive pressure sensors, capacitive pressure sensors, inductive pressure sensors and piezoelectric pressure sensors.
Optionally, the first wireless communication module and the second wireless communication module are bluetooth modules.
Further, the first control module is further configured to determine whether a pressure value detected by the passive sensing module is greater than a preset threshold, and send the pressure detection result to the electronic device through the first wireless communication module when the detected pressure value is greater than the preset threshold.
Further, the capacitance pen further comprises a power supply module, the first control module is further configured to determine whether a duration of non-contact between the active electrode and the passive electrode and the electronic device is greater than a preset threshold, and when the duration of non-contact is greater than the preset threshold, the first control module turns off the power supply module.
In a second aspect, an embodiment of the present invention provides a capacitive pen applied to an electronic device with a touch panel, including:
the pen comprises a pen main body, an active electrode module arranged at the head of the pen main body, a passive induction module arranged at the tail of the pen main body, a control module and a wireless communication module which are arranged in an inner cavity of the pen main body;
the active electrode module comprises an active electrode, and the active electrode is used for indicating the position on the touch panel;
the passive sensing module comprises a passive electrode, a touch panel and a touch control module, wherein the passive electrode is used for simulating the touch operation of a finger of a user, indicating the position on the touch panel and detecting the pressure applied to the passive electrode;
the control module controls the wireless communication module to send the pressure detection result obtained by the passive sensing module to the electronic equipment for controlling the erasing operation of the electronic equipment.
Optionally, the passive sensing module comprises one of the following pressure sensors: piezoresistive pressure sensors, capacitive pressure sensors, inductive pressure sensors and piezoelectric pressure sensors.
Optionally, the wireless communication module is a bluetooth module.
Furthermore, the capacitance pen further comprises a power supply module, and the first control module controls the power supply module to be turned on and off.
Furthermore, the capacitance pen also comprises a switch module which is used for controlling the power supply module to be switched on and off.
Furthermore, the passive induction module and the pen main body are detachably mounted.
In a third aspect, an embodiment of the present invention provides a capacitive pen control circuit, where the capacitive pen control circuit includes an active electrode circuit unit, a passive sensing circuit unit, a main control circuit unit, and a wireless communication circuit unit, a first input end and a second input end of the main control circuit unit are respectively connected to output ends of the active electrode circuit unit and the passive sensing circuit unit, a first output end and a second output end of the main control circuit unit are respectively connected to input ends of the active electrode circuit unit and the wireless communication circuit unit, the passive sensing circuit unit is configured to output a pressure detection signal and output the pressure detection signal to the main control circuit unit, and the main control circuit unit sends the pressure detection signal to an external electronic device through the wireless communication circuit unit to control an erasing operation of the electronic device.
Furthermore, the passive sensing circuit unit comprises a passive electrode and a pressure sensing sub-circuit unit which are coupled, and the output end of the pressure sensing sub-circuit unit is connected with the second input end of the main control circuit unit.
Optionally, the wireless communication circuit unit includes a bluetooth chip.
Furthermore, the capacitance pen control circuit further comprises a power supply circuit unit, the power supply circuit unit is connected with the main control circuit unit, and the main control circuit unit sends a control signal to control the power supply circuit unit to supply power or cut off power.
Furthermore, the capacitance pen control circuit further comprises a switch circuit unit, wherein the switch circuit unit is connected with the power supply circuit unit and controls the power supply or the power failure of the power supply circuit unit.
According to the capacitive pen system and the capacitive pen provided by the embodiment of the invention, the passive induction module is added at the pen tail of the capacitive pen, so that when the passive electrode is in contact with the touch panel of the electronic device, the erasing operation intention of a user can be obtained through the detection result of the passive induction module, the erasing operation intention is sent to the electronic device through the wireless communication module, and the electronic device directly executes the erasing operation. According to the capacitance pen control circuit provided by the embodiment of the invention, the active electrode circuit unit and the passive induction circuit unit are controlled by the main control circuit, so that the active writing and passive erasing of the capacitance pen end can be controlled, the capacitance pen adopting the circuit does not need to be additionally provided with an additional active electrode transmitting circuit, the circuit structure design can be simplified, the product cost is saved, and the power consumption is reduced.
Drawings
While the drawings needed to describe the invention or prior art arrangements in a more complete description of the embodiments or prior art are briefly described below, it should be apparent that the drawings described below are illustrative of some embodiments of the invention and that other drawings may be derived therefrom by those skilled in the art without the benefit of the inventive faculty.
Fig. 1 is a schematic perspective view of a capacitance pen system according to an embodiment of the present invention;
fig. 2 is a block diagram of a capacitance pen system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating position detection of an active electrode according to an embodiment of the present invention;
fig. 4 is another structural block diagram of a capacitance pen system according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of a capacitive pen according to a second embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a capacitance pen according to a second embodiment of the present invention;
fig. 7 is another schematic cross-sectional view of a capacitive pen according to a second embodiment of the present invention;
fig. 8 is another schematic cross-sectional view of a capacitive pen according to a second embodiment of the present invention;
fig. 9 is another perspective view of a capacitive pen according to a second embodiment of the present invention;
fig. 10 is a circuit block diagram of a capacitance pen control circuit according to a third embodiment of the present invention;
fig. 11 is a circuit block diagram of an active electrode circuit unit according to a third embodiment of the present invention;
fig. 12 is another circuit block diagram of the capacitance pen control circuit according to the third embodiment of the present invention;
fig. 13 is a circuit block diagram of a capacitance pen control circuit according to a third embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Example one
See fig. 1 and 2. The embodiment of the invention provides a capacitive pen system, which comprises a capacitive pen 1 and an electronic device 2, wherein in the embodiment, the electronic device 2 is an electronic device with a capacitive touch panel, such as a mobile phone, an ultra-notebook, a tablet and the like.
The capacitance pen 1 at least comprises an active electrode module 101, a passive induction module 102, a first control module 103 and a first wireless communication module 104;
the electronic device 2 includes a touch position detecting module 201, a second control module 202, a second wireless communication module 203, and an operation executing module 204.
Specifically, the active electrode module 101 is installed at a pen point of the capacitive pen 1, the passive electrode module 102 is installed at a pen tail of the capacitive pen 1, and the first control module 103 and the first wireless communication module 104 are both installed in a pen body of the capacitive pen 1.
In this embodiment, the active electrode module 101 includes an active electrode as a pen tip of the capacitive pen 1 for sending an electrical signal;
the passive sensing module 102 includes a passive electrode for simulating a touch operation of a finger of a user, and the passive electrode may be installed at a pen tail of the capacitive pen 1 in a fixed manner, or may be sleeved at the pen tail of the capacitive pen 1 as a detachable pen cap.
The passive sensing module 102 is further configured to detect a pressure applied to the passive electrode, and transmit a pressure detection result to the first control module 103 to determine whether the passive electrode is in contact with the touch panel of the electronic device 2;
optionally, the passive sensing module 102 includes one of the following pressure sensors: piezoresistive pressure sensors, capacitive pressure sensors, inductive pressure sensors and piezoelectric pressure sensors.
In one embodiment of this embodiment, the pressure sensor adopted by the passive sensing module 102 is a piezoresistive pressure sensor, specifically, a resistance strain gauge pressure sensor, a resistance strain gauge of the resistance strain gauge pressure sensor is attached to the passive electrode, when the passive electrode contacts the electronic device and deforms, the resistance strain gauge deforms correspondingly, and a corresponding pressure detection result can be obtained according to a change in resistance value of the resistance strain gauge.
In another scheme of this embodiment, the pressure sensor adopted by the passive sensing module 102 is a capacitive pressure sensor, and specifically includes a pressure sensing electrode, where the pressure sensing electrode and the passive electrode form a capacitor, and when the passive electrode is subjected to pressure displacement or deformation, the passive sensing module 102 obtains a capacitance value or a capacitance change value of the capacitor, so as to obtain a corresponding pressure detection result.
Optionally, in other aspects of this embodiment, the passive sensing module 102 may also specifically employ other types of pressure sensors, such as a semiconductor strain gauge pressure sensor, a piezoresistive pressure sensor, an inductive pressure sensor, and the like.
The first control module 103 is configured to control the active electrode module 101 to emit an electrical signal through the active electrode and transmit the electrical signal to the outside, and on the other hand, control the first wireless communication module 104 to send the pressure detection result to the second wireless communication module 203 located in the electronic device 2, and then transmit the pressure detection result to the second control module 202 located in the electronic device 2.
The electronic device 2 comprises a touch position detection module 201, a second control module 202 and a second wireless communication module 203;
the touch position detecting module 201 is configured to detect an electrical signal emitted by an active electrode of the active electrode module 101 and detect a touch of a passive electrode of the passive sensing module 102.
Specifically, the touch position detection module 201 is a touch panel of the electronic device 2.
For the active electrode module 101, as shown in fig. 3, a schematic diagram of position detection of the active electrodes of the active electrode module 101 on the touch panel is shown, when the active electrode contacts the touch panel, the active electrode emits an electric signal to form an electric field, a certain number of horizontal detection electrodes and vertical detection electrodes are distributed on the touch panel and used for detecting the electric signal emitted by the active electrode, because the electric signal emitted by the active electrode is attenuated in the process of propagation, the intensity of the electric signal detected by the detection electrode which is closer to the active electrode is higher, and the signal is gradually attenuated along with the increase of the distance, the position coordinates of the active electrode module 101 on the touch panel can be calculated in both the horizontal direction and the vertical direction.
For the passive sensing module 102, when the passive electrode contacts the touch panel, a coupling capacitance is formed between the passive electrode and the conductive layer of the touch panel, the current generated by the detection electrode of the touch position detection module 201 flows to the contact point, and the intensity of the current is proportional to the distance from the passive electrode to the detection electrode, according to this rule, the position coordinate of the passive electrode of the passive sensing module 102 on the touch panel can be accurately calculated according to the calculated proportion and intensity of the current.
The second control module 202 is configured to determine the position coordinates of the contact point between the active electrode of the active electrode module 101 and the touch panel of the electronic device 2, so as to control the operation execution module 204 to execute a writing or clicking operation, and to determine the position coordinates of the contact point between the passive electrode of the passive sensing module 102 and the touch panel of the electronic device 2, and at the same time, analyze the pressure detection result sent from the capacitive pen 1, and control the operation execution module 204 to execute an erasing operation according to the obtained position coordinates and the pressure detection result. Specifically, the second control module 202 is a Central Processing Unit (CPU) module installed in the electronic device.
In the capacitive pen system, the active electrode module 101 of the capacitive pen 1 can perform a click operation or a writing operation, and the passive sensing module 102 of the capacitive pen 1 can perform an erasing operation, and the following describes the operation process of the capacitive pen system.
When writing or clicking operation is performed through the active electrode module 101 of the capacitive pen 1, the working process is as follows:
s101, an active electrode of the active electrode module 101 contacts a touch panel of the electronic device 2;
s102, the active electrode module 101 emits an electric signal through an active electrode to form an electric field on the surface of the touch panel;
s103, the touch position detecting module 201 detects intensity distribution of the electrical signal emitted by the active electrode, and sends the detected intensity distribution data of the electrical signal to the second control module 202;
s104, the second control module 202 calculates position coordinates of a contact point of the active electrode and the touch panel according to intensity distribution data of an electric signal;
s105, the second control module 202 controls the operation execution module 204 to execute writing or clicking operation.
On the other hand, when the passive sensing module 102 of the capacitance pen 1 performs the erasing operation, the working process is as follows:
s201, a passive electrode of the passive induction module 102 contacts a touch panel of the electronic device 2;
s202, the passive sensing module 102 detects pressure applied to the passive electrode, and transmits a pressure detection result to the first control module 103, and the first control module 103 controls the first wireless communication module 104 to send the pressure detection result to the second wireless communication module 203, and transmits the pressure detection result to the second control module 202;
s203, the touch position detecting module 201 detects a touch of the passive electrode, and sends touch detection data to the second control module 202;
s204, the second control module 202 calculates position coordinates of a contact point of the passive electrode and the touch panel according to touch detection data, and analyzes the pressure detection result;
s205, the second control module 202 controls the operation execution module 204 to execute the erasing operation according to the obtained position coordinates and the analysis information of the pressure detection result.
As an alternative of the embodiment of the present invention, in step S202, the first control module 103 controls the first wireless communication module 104 to send the pressure detection result to the second wireless communication module 203 specifically as: the first control module 103 determines whether the pressure value detected by the passive sensing module 102 is greater than a preset threshold, and sends the pressure detection result to the second wireless communication module 203 of the electronic device 2 through the first wireless communication module 104 when the detected pressure value is greater than the preset threshold.
Optionally, the steps S202 and S203 are performed synchronously.
Optionally, in this embodiment, the first wireless communication module 104 and the second wireless communication module 203 are both bluetooth modules.
In this embodiment, as shown in fig. 4, the capacitance pen 1 further includes a power supply module 105, the first control module 103 is further configured to determine whether a duration of the active electrode module 101 and the passive sensing module 102 in a non-contact state with the electronic device 2 is greater than a preset threshold, and when the duration in the non-contact state is greater than the preset threshold, the first control module 103 controls the power supply module 105 to turn off.
Optionally, the capacitance pen 1 further includes a switch module 106 for a user to manually control the power supply module 105 to be turned on or off.
According to the capacitive pen system provided by the embodiment of the invention, the passive induction module is additionally arranged at the pen tail of the capacitive pen, the passive induction module comprises the passive electrode, when the passive electrode is contacted with the touch panel of the electronic equipment, the passive induction module detects the pressure applied to the passive electrode, so that the erasing operation intention of a user is obtained according to the detection result, the erasing operation intention is sent to the electronic equipment through the wireless communication module, and the electronic equipment directly executes the erasing operation.
Example two
The embodiment of the invention provides a capacitive pen, which is applied to electronic equipment with a touch panel and is applied to a capacitive pen system in the embodiment I.
Referring to fig. 5 and fig. 6, wherein fig. 5 is a schematic perspective view of the capacitive pen in the present embodiment, and fig. 6 is a schematic cross-sectional view of the capacitive pen in the present embodiment, the capacitive pen includes a pen main body 3, an active electrode module 301 installed at the head of the pen main body 3, a passive sensing module 302 installed at the tail of the pen main body, and a control module 303 and a wireless communication module 304 installed in an inner cavity of the pen main body 3;
in this embodiment, the active electrode module 301 is used to indicate a position of the active electrode 3011 on a touch panel of an electronic device, and can perform a clicking operation or a writing operation in the electronic device. Specifically, the active electrode module 301 includes an active electrode 3011, a pressure detection unit 3012, and a signal generation unit 3013, where when the active electrode 3011 contacts a touch panel of an electronic device, the pressure detection unit 3012 detects a pressure of the active electrode 3011, and when the pressure is detected, the control module 303 controls the signal generation unit 3013 to generate an electrical signal and emit the electrical signal through the active electrode 3011, and when the electronic device detects the electrical signal, the electronic device may perform a click operation or a writing operation accordingly.
The passive sensing module 302 includes a passive electrode (not shown) for simulating a touch operation of a finger of a user, indicating a position of the passive electrode on the touch panel, and specifically, an erasing operation can be performed in the electronic device through the passive sensing module 302, when the passive electrode contacts the touch panel of the electronic device, on one hand, the passive sensing module 302 detects the pressure applied to the passive electrode, and transmits the pressure detection result to the control module 303 to confirm that the passive electrode is in a contact state with the touch panel of the electronic device, meanwhile, the control module 303 controls the wireless communication module 304 to send the pressure detection result to the electronic device, and on the other hand, the electronic device detects the position coordinates of the contact point between the passive electrode and the touch panel of the electronic device, and the electronic device executes a corresponding erasing operation after receiving the pressure detection result and obtaining the position coordinates.
In this embodiment, the passive electrode of the passive sensing module may be fixedly installed at the pen tail of the capacitive pen, or may be sleeved at the pen tail of the capacitive pen as a detachable pen cap, and fig. 6 and 7 show two setting manners of the passive electrode of the passive sensing module.
Optionally, the passive sensing module 302 includes one of the following pressure sensors: piezoresistive pressure sensors, capacitive pressure sensors, inductive pressure sensors and piezoelectric pressure sensors.
In an aspect of this embodiment, the pressure sensor adopted by the passive sensing module 302 is a resistance strain gauge pressure sensor, and a resistance strain gauge of the resistance strain gauge pressure sensor is attached to the passive electrode. When the passive electrode is subjected to pressure to generate displacement or deformation, the resistance strain gauge is correspondingly deformed, and a corresponding pressure detection result can be obtained according to the resistance value change of the resistance strain gauge.
In another scheme of this embodiment, the passive sensing module 302 includes a pressure sensing electrode, the pressure sensing electrode and the passive electrode form a capacitor, and when the passive electrode is subjected to pressure displacement or deformation, the passive sensing module 302 obtains a capacitance value or a capacitance variation value of the capacitor, so as to obtain a corresponding pressure detection result.
In other aspects of this embodiment, the passive sensing module 302 may also employ other types of pressure sensors, such as semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, inductive pressure sensors, and the like
In this embodiment, the wireless communication module 304 is a bluetooth module.
In this embodiment, as shown in fig. 8, the capacitive pen further includes a power supply module 305, configured to supply power to other modules, and optionally, when the time that the capacitive pen is in the unused state exceeds a preset time duration, the control module 303 controls the power supply module 305 to stop supplying power.
Optionally, as shown in fig. 9, the capacitive pen further includes a switch module 306, which controls the capacitive pen to be turned on and off by controlling the power supply and the power failure of the power supply module 305. Optionally, the capacitance pen further includes a hook 307.
According to the capacitive pen provided by the embodiment of the invention, the passive induction module is additionally arranged at the pen tail of the capacitive pen, the passive induction module comprises the passive electrode, when the passive electrode is contacted with the touch panel of the electronic equipment, the passive induction module detects the pressure applied to the passive electrode, so that the erasing operation intention of a user is obtained according to the detection result, the erasing operation intention is sent to the electronic equipment through the wireless communication module, and the electronic equipment directly executes the erasing operation.
EXAMPLE III
The embodiment of the invention provides a capacitance pen control circuit which can be applied to a capacitance pen system described in the first embodiment and a capacitance pen described in the second embodiment.
Referring to the structural block diagram of the capacitance pen control circuit shown in fig. 10, the capacitance pen control circuit includes an active electrode circuit unit 401, a passive sensing circuit unit 402, a main control circuit unit 403, and a wireless communication circuit unit 404; wherein, the first input and the second input of main control circuit unit 401 are connected respectively the output of active electrode circuit unit 401 and passive induction circuit unit 402, the first output and the second output of main control circuit unit 401 are connected respectively the input of active electrode circuit unit 401 and wireless communication circuit unit 404, passive induction circuit unit 402 is used for exporting the pressure detection signal and exports to main control circuit unit 403, main control circuit unit 403 will the pressure detection signal passes through wireless communication circuit unit 404 sends to external electronic equipment in order to control electronic equipment's the operation of erasing.
Specifically, as shown in fig. 11, the active electrode circuit unit 401 includes an active electrode 4011, a pressure detection subunit 4012, and a signal generation subunit 4013, when the active electrode 4011 contacts a touch panel of the electronic device, the pressure detection subunit 4012 detects a pressure of the active electrode 4011, when the pressure is detected, a piezoelectric signal is generated and sent to the main control circuit unit 403, the main control circuit unit 403 sends a control signal to the signal generation subunit 4013 after receiving the piezoelectric signal, controls the signal generation subunit 4013 to generate an electrical signal, and transmits the electrical signal through the active electrode 4011, and when the electronic device detects the electrical signal, the electronic device can correspondingly execute a click or a writing operation.
The passive sensing circuit unit 402 includes a passive electrode (not shown) and a pressure sensing sub-circuit unit (not shown) coupled to each other, an output end of the pressure sensing sub-circuit unit is connected to the second input end of the main control circuit unit, wherein the passive electrode is used for simulating a touch operation of a finger of a user and indicating a position of the passive electrode on the touch panel, and the passive sensing circuit unit 402 can perform an erasing operation in the electronic device, specifically, when the passive electrode contacts the touch panel of the electronic device, the passive sensing circuit unit 402 detects a pressure applied to the passive electrode and transmits a pressure detection result to the main control circuit unit 403 to confirm that the passive electrode and the touch panel of the electronic device are in a contact state, and meanwhile, the main control circuit unit 403 sends a control signal to the wireless communication circuit unit 404, the wireless communication circuit unit 404 is controlled to send the pressure detection result to the electronic device, so that the electronic device executes a corresponding erasing operation after detecting the position coordinates of the contact point of the passive electrode and the touch panel of the electronic device and receiving the pressure detection result.
The pressure sensing sub-circuit unit can adopt a specific pressure sensor, and the pressure sensor comprises any one of the following components: piezoresistive pressure sensors, capacitive pressure sensors, inductive pressure sensors and piezoelectric pressure sensors.
In one embodiment of this embodiment, the pressure sensor used in the pressure sensing sub-circuit unit is a resistance strain gauge pressure sensor, and a resistance strain gauge of the resistance strain gauge pressure sensor is attached to the passive electrode. When the passive electrode is subjected to pressure to generate displacement or deformation, the resistance strain gauge is correspondingly deformed, and a corresponding pressure detection result can be obtained according to the resistance value change of the resistance strain gauge.
In another scheme of this embodiment, the pressure sensing sub-circuit unit includes a pressure sensing electrode, the pressure sensing electrode and the passive electrode form a capacitor, and when the passive electrode is subjected to pressure displacement or deformation, the pressure sensing sub-circuit unit obtains a capacitance value or a capacitance change value of the capacitor, so as to obtain a corresponding pressure detection result.
In other aspects of this embodiment, the pressure sensing sub-circuit unit may also employ other types of pressure sensors, such as a semiconductor strain gauge pressure sensor, a piezoresistive pressure sensor, an inductive pressure sensor, and the like.
In this embodiment, as shown in fig. 12, the capacitance pen control circuit further includes a power supply circuit unit 405, the power supply circuit unit is respectively connected to the active electrode circuit unit, the passive sensing circuit unit, the main control circuit unit, and the wireless communication circuit unit, the main control circuit unit 403 can send control to the power supply circuit unit 405 to control power supply or power off of the power supply circuit unit 405, so as to control on and off of the capacitance pen.
Optionally, as shown in fig. 13, the capacitance pen control circuit further includes a switch circuit unit 406, and the switch circuit unit 406 controls power supply or power off of the power supply circuit unit 405, so as to control on and off of the capacitance pen.
In this embodiment, the main control circuit includes a control chip, and the wireless communication circuit module includes a bluetooth chip.
In some other examples, the wireless communication circuit unit may be replaced with a wired communication circuit unit.
In another embodiment, the passive sensing module is detachably mounted with the pen body, or partially detachably mounted. In one example, the passive sensing module may include a separate wireless communication unit for communicating with the master control circuit of the active pen or the master control circuit of the touch screen device in addition to the pressure detector, so as to transmit the pressure signal representing the erasing intention, in which case, the passive sensing module may be used as an electronic eraser separated from the capacitive pen.
According to the capacitance pen control circuit provided by the embodiment of the invention, the active electrode circuit unit and the passive induction circuit unit are controlled by the main control circuit, so that the active writing and passive erasing of the capacitance pen end can be controlled, the capacitance pen adopting the circuit does not need to be additionally provided with an additional active electrode transmitting circuit, the circuit structure design can be simplified, the product cost is saved, and the power consumption is reduced.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention without limiting its scope. This invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made, and equivalents may be substituted for elements thereof. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.
Claims (15)
1. A capacitive stylus system, comprising:
a capacitance pen and an electronic device;
the capacitive pen comprises an active electrode module, a passive induction module, a first control module and a first wireless communication module, wherein the active electrode module comprises an active electrode, and the passive induction module comprises a passive electrode;
the electronic equipment comprises a touch position detection module, a second control module, a second wireless communication module and an operation execution module;
the touch position detection module detects an electric signal emitted by the active electrode, and the second control module determines the position coordinate of a contact point of the active electrode and the electronic equipment and controls the operation execution module to execute writing or clicking operation;
the touch position detection module detects the touch of the passive electrode, the second control module determines the position coordinates of the contact point of the passive electrode and the electronic equipment, the passive sensing module detects the pressure applied to the passive electrode, the first control module controls the first wireless communication module to send the pressure detection result to the second wireless communication module, and transmits the position coordinates and the pressure detection result to the second control module, the second control module controls the operation execution module to execute the erasing operation according to the position coordinates and the pressure detection result, the second control module is used for determining the position coordinates of the contact point of the passive electrode of the passive induction module and the touch panel of the electronic equipment, and analyzing the pressure detection result sent by the capacitance pen, controlling the operation execution module to execute an erasing operation according to the obtained position coordinate and the pressure detection result;
the first control module is further configured to determine whether a pressure value detected by the passive sensing module is greater than a preset threshold, and send the pressure detection result to the electronic device through the first wireless communication module when the detected pressure value is greater than the preset threshold.
2. The capacitive stylus system of claim 1, wherein the passive sensing module comprises one of the following pressure sensors: piezoresistive pressure sensors, capacitive pressure sensors, inductive pressure sensors and piezoelectric pressure sensors.
3. The capacitive pen system of claim 1, wherein the first and second wireless communication modules are bluetooth modules.
4. The capacitive pen system according to any one of claims 1 to 3, wherein the capacitive pen further comprises a power supply module, the first control module is further configured to determine whether a duration of the non-contact between the active electrode and the passive electrode and the electronic device is greater than a preset threshold, and when the duration of the non-contact is greater than the preset threshold, the power supply module of the first control module is turned off.
5. A capacitive pen for use in an electronic device with a touch panel, the capacitive pen system of any one of claims 1-4 comprising: the pen comprises a pen main body, an active electrode module arranged at the head of the pen main body, a passive induction module arranged at the tail of the pen main body, a first control module and a wireless communication module which are arranged in an inner cavity of the pen main body;
the active electrode module comprises an active electrode, and the active electrode is used for indicating the position on the touch panel;
the passive sensing module comprises a passive electrode, a touch panel and a touch control module, wherein the passive electrode is used for simulating the touch operation of a finger of a user, indicating the position on the touch panel and detecting the pressure applied to the passive electrode;
the first control module controls the wireless communication module to send the pressure detection result obtained by the passive sensing module to the electronic equipment for controlling the erasing operation of the electronic equipment.
6. The stylus of claim 5, wherein the passive sensing module comprises one of the following pressure sensors: piezoresistive pressure sensors, capacitive pressure sensors, inductive pressure sensors and piezoelectric pressure sensors.
7. The stylus of claim 5, wherein the wireless communication module is a Bluetooth module.
8. The capacitive pen according to any one of claims 5 to 7, further comprising a power supply module, wherein the first control module controls the power supply module to be turned on and off.
9. The stylus according to claim 8, further comprising a switch module for controlling the power module to turn on and off.
10. The stylus of claim 5, wherein the passive sensing module is removably mountable to the stylus body.
11. A capacitance pen control circuit applied to the capacitance pen system according to any one of claims 1 to 4, it is characterized in that the capacitance pen control circuit comprises an active electrode circuit unit, a passive induction circuit unit, a main control circuit unit and a wireless communication circuit unit, the first input end and the second input end of the main control circuit unit are respectively connected with the output ends of the active electrode circuit unit and the passive induction circuit unit, the first output end and the second output end of the main control circuit unit are respectively connected with the input ends of the active electrode circuit unit and the wireless communication circuit unit, the passive sensing circuit unit is used for outputting a pressure detection signal and outputting the pressure detection signal to the main control circuit unit, the main control circuit unit sends the pressure detection signal to external electronic equipment through the wireless communication circuit unit so as to control the erasing operation of the electronic equipment.
12. The control circuit of claim 11, wherein the passive sensing circuit unit comprises a passive electrode and a pressure sensing sub-circuit unit coupled to each other, and an output terminal of the pressure sensing sub-circuit unit is connected to the second input terminal of the main control circuit unit.
13. The capacitance pen control circuit according to claim 11, wherein the wireless communication circuit unit comprises a bluetooth chip.
14. The capacitance pen control circuit according to any one of claims 11-13, further comprising a power supply circuit unit, wherein the power supply circuit unit is connected to the main control circuit unit, and the main control circuit unit sends a control signal to control the power supply circuit unit to supply or cut off power.
15. The capacitance pen control circuit according to claim 14, further comprising a switch circuit unit, wherein the switch circuit unit is connected to the power supply circuit unit and controls power supply or power off of the power supply circuit unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/078034 WO2018170871A1 (en) | 2017-03-24 | 2017-03-24 | Capacitance stylus system, capacitance stylus and capacitance stylus control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108934180A CN108934180A (en) | 2018-12-04 |
| CN108934180B true CN108934180B (en) | 2021-12-21 |
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| CN201780000199.XA Active CN108934180B (en) | 2017-03-24 | 2017-03-24 | Capacitance pen system, capacitance pen and capacitance pen control circuit |
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| Country | Link |
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| CN (1) | CN108934180B (en) |
| WO (1) | WO2018170871A1 (en) |
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|---|---|---|---|---|
| TW202117509A (en) * | 2019-10-23 | 2021-05-01 | 翰碩電子股份有限公司 | Stylus structure |
| CN112306267B (en) * | 2020-10-12 | 2022-03-29 | 安徽鸿程光电有限公司 | Active capacitance pen |
| CN113178900B (en) * | 2021-03-15 | 2023-02-17 | 荣耀终端有限公司 | Wireless charging system, chip and wireless charging circuit |
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| JP2011123833A (en) * | 2009-12-14 | 2011-06-23 | Sony Corp | Information processing system and electronic pen |
| CN101782812A (en) * | 2010-02-05 | 2010-07-21 | 北京华育天成科技有限公司 | Self-powered intelligent whiteboard pen |
| CN102213852B (en) * | 2010-04-09 | 2015-07-08 | 上海天马微电子有限公司 | Touch displaying device and manufacturing method thereof |
| US9122322B2 (en) * | 2011-03-17 | 2015-09-01 | Microsoft Technology Licensing, Llc | Interacting tips for a digitizer stylus |
| KR101820410B1 (en) * | 2011-05-16 | 2018-03-02 | 삼성전자주식회사 | Apparatus and method for supporting eraser function of digitizer pen in digitizer system |
| KR101389489B1 (en) * | 2012-08-14 | 2014-04-25 | 민병묵 | Stylus pen for mobile device |
| CN102866792B (en) * | 2012-08-20 | 2016-06-01 | 深圳市汇顶科技股份有限公司 | A kind of felt pen, touch controller, touch detecting system and method thereof |
| KR101910578B1 (en) * | 2012-11-09 | 2018-10-22 | 삼성전자주식회사 | Color optical pen for e-board or display |
| US9304609B2 (en) * | 2013-03-12 | 2016-04-05 | Lenovo (Singapore) Pte. Ltd. | Suspending tablet computer by stylus detection |
| US9213424B1 (en) * | 2013-09-23 | 2015-12-15 | Amazon Technologies, Inc. | Stylus devices with eraser |
| US9105255B2 (en) * | 2013-12-20 | 2015-08-11 | Sharp Kabushiki Kaisha | Discriminative capacitive touch panel |
| EP2924545A1 (en) * | 2014-03-28 | 2015-09-30 | Samsung Display Co., Ltd. | System and method for generating haptic feedback in stylus |
| KR101595319B1 (en) * | 2014-11-13 | 2016-02-18 | (주)컴버스테크 | Electric pen for interactive board |
| US9575573B2 (en) * | 2014-12-18 | 2017-02-21 | Apple Inc. | Stylus with touch sensor |
| JP6085630B2 (en) * | 2015-03-10 | 2017-02-22 | レノボ・シンガポール・プライベート・リミテッド | Touch pen system and touch pen |
| TWM517860U (en) * | 2015-10-16 | 2016-02-21 | 翰碩電子股份有限公司 | Capacitive stylus with eraser |
| KR102014122B1 (en) * | 2016-08-17 | 2019-08-26 | 선전 구딕스 테크놀로지 컴퍼니, 리미티드 | Input device detection method and detection device |
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| WO2018170871A1 (en) | 2018-09-27 |
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