CN213482840U - Touch pen, touch pen identification system and electronic equipment - Google Patents
Touch pen, touch pen identification system and electronic equipment Download PDFInfo
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- CN213482840U CN213482840U CN202021871128.2U CN202021871128U CN213482840U CN 213482840 U CN213482840 U CN 213482840U CN 202021871128 U CN202021871128 U CN 202021871128U CN 213482840 U CN213482840 U CN 213482840U
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Abstract
The embodiment of the application discloses touch-control pen, touch-control pen identification system and electronic equipment, the touch-control pen includes nib, a body and resonant circuit, wherein: the pen body comprises an accommodating space; the pen head is connected with the pen body; the resonance circuit is configured in the accommodating space and is respectively connected with the pen point and the pen body; the pen point collects at least two paths of first resonance signals sequentially transmitted by the touch display equipment, the at least two paths of first resonance signals are transmitted to the resonance circuit through the pen point and respectively generate second resonance signals corresponding to the first resonance signals, and the second resonance signals are output to the touch display equipment through the pen point; wherein the second resonance signal is used for the touch display device to identify the stylus. By adopting the embodiment of the application, the touch pen is simple in structure and can be identified simply and conveniently.
Description
Technical Field
The present application relates to the field of computer technologies, and in particular, to a stylus, a stylus recognition system, and an electronic device.
Background
With the rapid development of electronic devices, electronic devices with touch display devices have been widely used in daily life, and various touch pens used in the touch display devices and used in cooperation with the touch display devices have been promoted. In the process of using the touch display device in cooperation with the stylus, the identification of the stylus, such as the identification of the stylus and the finger, is involved, so as to distinguish the stylus from the finger of the user, and also such as the identification of different types of styli or the identification of styli corresponding to different operation types.
At present, in the process of identifying a stylus, the stylus usually needs to be added with a complex chip or circuit, if a chip for corresponding the identity of the stylus needs to be added; if a corresponding circuit signal transceiving circuit is added at the touch display equipment side or the touch pen side; therefore, the structure of the touch pen is complex, and the cost for realizing touch pen identification is high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a touch pen, a touch pen identification system and electronic equipment. The technical scheme is as follows:
in a first aspect, an embodiment of the present application provides a touch pen, configured to cooperate with a touch display device, a pen point, a pen body, and a resonant circuit, where:
the pen head is connected with the pen body;
the pen body comprises an accommodating space;
the resonance circuit is configured in the accommodating space and is connected with the pen point;
the pen point collects at least two paths of first resonance signals sequentially transmitted by the touch display equipment, the at least two paths of first resonance signals are transmitted to the resonance circuit through the pen point and respectively generate second resonance signals corresponding to the first resonance signals, and the second resonance signals are output to the touch display equipment through the pen point;
wherein the second resonance signal is used for the touch display device to identify the stylus.
Optionally, the resonant circuit includes a first resistor, a first capacitor, and a first inductor, where:
one end of the first resistor is connected to the pen point and one end of the first capacitor and acquires the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first resistor is connected to the pen body and the other end of the first capacitor;
one end of the first capacitor is connected to the pen point and one end of the first inductor and acquires the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first capacitor is connected to the pen body and the other end of the first inductor;
one end of the first inductor is connected to the pen point and one end of the first resistor and obtains the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first inductor is connected to the pen body and the other end of the first resistor.
Optionally, the resonant circuit includes a first resistor, a first capacitor, and a first inductor, where:
one end of the first resistor is connected to the pen point and acquires the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first resistor is connected with the first capacitor;
the other end of the first capacitor is connected with one end of the first inductor;
the other end of the first inductor is connected with the pen body.
Optionally, the resonance circuit obtains the at least two first resonance signals transmitted by the pen point, and generates second resonance signals corresponding to the first resonance signals at reference resonance frequencies corresponding to the resonance circuit, respectively, and the second resonance signals are output to the touch display device through the pen point.
Optionally, the resonant frequencies corresponding to the at least two first resonant signals include the reference resonant frequency.
Optionally, the resonance circuit obtains the at least two first resonance signals sequentially transmitted through the pen point, and generates a first resonance current when a resonance frequency corresponding to the first resonance signal is the reference resonance frequency; or the like, or, alternatively,
when the resonant frequency corresponding to the first resonant signal is not the reference resonant frequency, generating a second resonant current;
wherein the first resonant current is less than the second resonant current.
Optionally, the resonance circuit obtains the at least two first resonance signals sequentially transmitted through the pen point, and generates a first resonance current when a resonance frequency corresponding to the first resonance signal is the reference resonance frequency; or the like, or, alternatively,
when the resonant frequency corresponding to the first resonant signal is not the reference resonant frequency, generating a second resonant current;
wherein the first resonant current is greater than the second resonant current.
In a second aspect, an embodiment of the present application provides a stylus recognition system, including the stylus and the touch display device as described above, wherein:
the touch display device is configured to sense the touch pen and sequentially transmit at least two paths of first resonance signals;
the touch control pen is configured to collect the at least two paths of first resonance signals sequentially emitted by the touch control display equipment and generate second resonance signals corresponding to the first resonance signals; and the number of the first and second groups,
outputting the second resonance signal to the touch display device;
wherein the touch display device is configured to: identifying the stylus in response to each received second resonant signal.
Optionally, the touch display device includes a signal comparator, wherein:
the signal comparator is configured to respond to the received second resonance signals, and identify the stylus pen when the second resonance signals are inconsistent.
In a third aspect, an embodiment of the present application provides an electronic device, which may include: a stylus recognition system as described above.
The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise:
in one or more embodiments of the present application, the stylus includes a pen head, a pen body, and a resonant circuit, wherein: the pen body comprises an accommodating space; the pen head is connected with the pen body; the resonance circuit is configured in the accommodating space and is respectively connected with the pen point and the pen body; the pen point collects at least two paths of first resonance signals sequentially transmitted by the touch display equipment, the at least two paths of first resonance signals are transmitted to the resonance circuit through the pen point and respectively generate second resonance signals corresponding to the first resonance signals, and the second resonance signals are output to the touch display equipment through the pen point; the touch control pen can assist the touch control display equipment matched with the touch control pen to identify the touch control pen through the second resonance signal. Meanwhile, the touch pen is simple in structure, an additional touch hardware circuit (such as a receiving and transmitting function circuit) is not required to be arranged, and the touch display equipment can be assisted to realize the identification of the touch pen without arranging a power supply part in the touch pen; by adopting the embodiment of the application, based on the at least two paths of first resonance signals and the second resonance signals corresponding to the first resonance signals, the differential identification of the touch pens in different types can be realized, and the cost of the touch pens is low.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a stylus provided in an embodiment of the present application;
fig. 2 is a schematic view of a scenario in which a stylus is used with a touch display device according to an embodiment of the present disclosure;
fig. 3 is a scene schematic diagram of a finger touch display device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a resonant circuit related to a stylus provided in an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating a linear relationship between a resonant signal and a reference resonant frequency of a stylus according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a resonant circuit involved in another stylus pen provided in the embodiment of the present application;
FIG. 7 is a schematic diagram illustrating a linear relationship between a reference resonant frequency and a related resonant signal of another stylus according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of an adopted frequency timing sequence corresponding to a touch display device used with a stylus according to an embodiment of the present disclosure;
fig. 9 is a schematic diagram of a frequency sequence adopted by another touch display device used with a stylus according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a display system according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of circuitry consistent with aspects of the present application, as detailed in the appended claims.
The present application will be described in detail with reference to specific examples.
Fig. 1 is a circuit schematic diagram of a data driving chip according to an embodiment of the present disclosure.
As shown in fig. 1, a stylus 100 is proposed, where the stylus 100 is generally used with a touch display device, and in this embodiment, the stylus 100 may be composed of a pen tip 101, a pen body 102 and a resonant circuit 103.
The pen point 101 is connected with the pen body 102; the front end of the pen body 102 is of a hollow platform structure, the platform structure can be a circular platform structure, and further, the smaller diameter end of the circular platform structure of the pen body 102 is connected with the pen point 101, that is, the pen point 101 can be arranged at the smaller diameter end of the circular platform structure. In addition, the pen point 101 is used for contacting with the touch display device to realize input or output of an electrical signal, such as a resonance signal, when the pen point 101 is configured, the pen point 101 is usually made of a conductive material, such as conductive foam, a metal brush, a conductive pen core, and a flexible rubber, as long as the pen point 101 is in contact with the touch display device enough to affect capacitance change on the touch display device.
Further, the pen point 101 is connected to the pen body 102, and the pen point 101 can be exposed outside the pen body, and the pen point 101 and the pen body 102 are insulated from each other, wherein the insulation manner is not limited to: in specific implementation, the pen point 101 may include a conductive fixing column and a cap, the cap of the pen point 101 is connected to the pen body, and the cap serves as an insulating layer to insulate the pen point 101 from the pen body 102;
the pen body 102 includes an accommodating space, the accommodating space may also be referred to as an accommodating cavity in some scenarios, the accommodating space of the pen body 102 may accommodate the resonant circuit 103, in addition, the pen body 102 may be in a cylindrical shape, and the cylindrical shape may be a cylindrical shape or a rectangular shape for a user to grasp, further, the pen body 102 may be made of a conductive material, and when the pen body 102 is made of a conductive material, the pen body is electrically connected to the user when the user controls the stylus 100 to contact the touch display device, so that the capacitance of the touch display device matrix can be changed when the stylus 100 contacts the touch display device.
The resonant circuit 103 is disposed in the accommodating space and connected to the pen tip 101 and the pen body 102, and further, the resonant circuit 103 may be connected to the pen tip 101 and the pen body 102 in a normal electrical connection manner, for example, the resonant circuit 103 may be electrically connected to the pen tip 101 through a conductive pen core;
the following explains the situation of the stylus 100 in the use of the touch display device in detail with reference to a specific implementation scenario;
in the embodiment of the present application, the stylus 100 is preferably a passive stylus 100, and the passive stylus 100 does not need an additional touch hardware circuit and a corresponding power supply circuit, so that the cost can be saved. Specifically, the stylus 100 is electrically connected in sequence through the pen point 101, the pen body 102 and the resonant circuit 103 to form a current transmission line, when a user holds the passive stylus 100 to perform a touch operation, a hand contacts a conductive part (a part formed by a conductive material) of the pen body 102, and current is transmitted from the touch display device to the hand according to the sequence of the pen point 101, the resonant circuit 103 and the pen body 102, so that capacitance change on the touch display device is affected, and a touch function of the passive stylus 100 is realized. The passive stylus 100 according to the embodiment of the present application can implement a differential operation with a smaller cost than an active stylus. The price of the active pen is at least several times of that of the passive pen, and the active pen has a complex circuit structure, is easy to oxidize, and has a service life far shorter than that of the passive pen.
Specifically, the resonant circuit included in the stylus 100 can be configured to identify the stylus 100 by the touch display device, and in practical applications, the stylus 100 can be distinguished from the non-stylus 100 (e.g., a finger of a user) based on corresponding resonant signals generated by the stylus 100 and the touch display device when the stylus 100 is used in cooperation with the touch display device. The method comprises the following specific steps:
as shown in fig. 2, when a user controls the stylus 100 to contact with the touch display device 201, the touch display device 201 may detect a type of a current contact object, and in practical applications, mainly to detect whether the contact object is the stylus 100, when the touch pen 100 is identified, a response is made to a contact operation of the stylus 100, and when the non-stylus 100 is contacted, for example, when the user touches with a finger, the response is not made;
specifically, the touch display device 201 may emit at least two first resonance signals at different reference resonance frequencies within a certain period, for example, emit a first resonance signal at a reference resonance frequency f1 within a time t1, and emit a second resonance signal at a resonance frequency f2 within a time t2, and when the stylus pen 100 contacts the touch display device, the pen point 101 included may collect at least two first resonance signals sequentially emitted by the touch display device due to direct contact with the touch display device, for example, receive the first resonance signal emitted by the touch display device within a time t1, and receive the first resonance signal emitted by the touch display device within a time t 2;
based on the internal structure of the stylus pen 100, the at least two first resonant signals may be transmitted to the resonant circuit 103 through the pen point 101, and the resonant circuit 103 may generate a resonant signal corresponding to the first resonant signal, that is, a second resonant signal, due to the resonant characteristic of the circuit, it can be understood that the signal characteristics (such as amplitude-frequency characteristics and circuit parameter characteristics) of the second resonant signals are generally inconsistent due to the difference of the resonant frequency when the first resonant signals of each circuit are transmitted.
The second resonant signal generated on the resonant circuit 103 may be output to the touch display device through the pen head, that is, a second resonant signal is fed back to the first resonant signal emitted by the touch display device; the second resonance signal is used for the touch display device 201 to identify the stylus pen 100, and specifically includes: the touch display device 201 transmits at least two first resonant signals, and also correspondingly receives second resonant signals corresponding to the first resonant signals fed back by the stylus pen 100, and the touch display device analyzes signal characteristics (such as amplitude-frequency characteristics) of the second resonant signals, so as to distinguish or identify the stylus pen 100.
Specifically, as shown in fig. 3, when a user touches the touch display device 201 by a finger, the finger usually corresponds to a resistor, in practical applications, according to characteristics of the resistor to the resonant signal, the reference resonant signals fed back respectively from the at least two first resonant signals transmitted by the touch display device 201 to the resistor usually do not change much, that is, when the touch display device 201 sequentially transmits the first resonant signals at different resonant frequencies, signal characteristics (such as amplitude-frequency characteristics) of the reference resonant signals received from the outside of the touch display device 201 due to the finger touch feedback are usually consistent, so that for the touch display device 201, the touch display device only needs to transmit the at least two first resonant signals, and perform signal characteristic analysis by the feedback resonant signals to determine whether the touch pen 100 is present, it is generally considered that when the second resonance signals fed back by the contact object are not consistent, the contact object can be determined to be the stylus pen 100. That is, it is realized that the recognition of the stylus 100 by the touch display device can be assisted based on the structure of the stylus 100.
Optionally, the resonant circuit 103 may be of a parallel resonance type or a series resonance type, and when the types of the resonant circuits are different, the first resonant signal and the second resonant signal of the stylus 100 and the touch display device 201 are different, and how to assist the touch display device to realize the recognition of the stylus 100 based on the internal structure of the stylus 100 will be described in detail with reference to specific embodiments, specifically as follows:
the resonant circuit 103 at least comprises a first resistor R1, a first capacitor C1 and a first inductor L1;
in a possible embodiment, as shown in fig. 4, the resonant circuit 103 may be of the parallel resonance type, as follows:
that is, one end of the first resistor R1 is connected to the pen tip 101 and one end of the first capacitor C1 and obtains the at least two first resonance signals transmitted by the pen tip 101, and the other end of the first resistor R1 is connected to the pen body 102 and the other end of the first capacitor C1;
one end of the first capacitor C1 is connected to the pen tip 101 and one end of the first inductor L1 and obtains the at least two first resonance signals transmitted by the pen tip 101, and the other end of the first capacitor C1 is connected to the pen body 102 and the other end of the first inductor L1;
one end of the first inductor L1 is connected to the pen tip 101 and one end of the first resistor R1 and obtains the at least two first resonance signals transmitted by the pen tip 101, and the other end of the first inductor L1 is connected to the pen body 102 and the other end of the first resistor R1.
Further, the resonant circuit 103 included in the stylus pen 100 corresponds to a reference resonant frequency F during configuration, that is: the pen point 101 collects at least two first resonance signals sequentially transmitted by the touch display device 201, the at least two first resonance signals are transmitted to the resonance circuit 103 through the pen point 101, second resonance signals corresponding to the first resonance signals are generated at reference resonance frequencies corresponding to the resonance circuit 103 respectively, and the second resonance signals are output to the touch display device through the pen point 101.
For example, when the resonant circuit 103 is of a parallel resonant type, the first resonant frequency corresponding to the first resonant signal is added to the parallel resonant circuit, and has the following characteristics:
1. when the first resonant frequency is equal to the reference resonant frequency, the impedance of the resonant circuit 103 is purely resistive and has a maximum value, and this characteristic can be understood as a frequency-selective circuit in practical application.
2. When the first resonant frequency is higher than the reference resonant frequency, the impedance of the resonant circuit 103 is capacitive, which is equivalent to a capacitor.
3. When the first resonant frequency is lower than the resonant frequency, the resonant circuit 103 is inductive and corresponds to an inductor.
Further, when the first resonant frequency is equal to the reference resonant frequency, generally, the equivalent impedance in the circuit is the largest, and the current signal in the circuit is the smallest (i.e., the current is the smallest), based on this characteristic, since the relevant parameters are already determined when the touch display device and the stylus 100 are produced, that is, the touch display device may store the first resonant frequency of the resonant circuit included in the stylus 100, the touch display device may transmit at least one first resonant signal at the reference resonant frequency "same as the first resonant frequency" in the detection period, and then transmit at least one first resonant signal at the reference resonant frequency "different from the first resonant frequency;
optionally, the second resonant signal may be a current type resonant signal, as follows:
when the stylus pen 100 is in contact with the touch display device 201, if a reference resonant frequency of a first resonant signal currently received by the stylus pen 100 is consistent with a first resonant frequency, at this time, a second resonant signal (assumed to be a first resonant current) generated by the resonant circuit 103 is reached, and at this time, a first resonant current fed back by the stylus pen 100 received by the touch display device is relatively minimum due to a maximum equivalent impedance, as shown in fig. 5, it is assumed that the touch display device sends two first resonant signals, and sends the first resonant signals at resonant frequencies f1 and f2, respectively; if the touch is performed by the stylus pen 100, the received first resonance current and the second resonance current are both minimum values;
when a user controls a finger to contact the touch display device 201, if a reference resonant frequency of a first resonant signal currently received by the stylus pen 100 is not consistent with the first resonant frequency, a second resonant signal (assumed to be a second resonant current) generated by the resonant circuit 103 is generated at this time, and at this time, the first resonant current fed back by the stylus pen 100 received by the touch display device is relatively small due to the maximum equivalent impedance, that is, the first resonant current is larger than the second resonant current;
further, based on this characteristic, because the related parameters are already determined when the touch display device and the stylus 100 are produced, that is, the touch display device may store the first resonant frequency of the resonant circuit included in the stylus 100, in practical applications, when the number of the stylus 100 used in cooperation with the touch display device is n (n is a positive integer), the first resonant frequencies of the n stylus 100 are all inconsistent, the touch display device may implement accurate identification on the n stylus 100 based on the above manner, at this time, the number of paths of the first resonant signal transmitted by the touch display device is strongly related to the number of the stylus 100, specifically, the number of paths of the transmitted first resonant signal is consistent with the number of the stylus 100:
if the first resonant frequency of the type a stylus 100 is f1, the first resonant frequency of the type B stylus 100 is f2, and the first resonant frequency of the type C stylus 100 is f3, the touch display device sequentially transmits a first resonant signal X1 at a resonant frequency f1, a first resonant signal X2 at a resonant frequency f2, and a first resonant signal X3 at a resonant frequency f 3. The specific judgment of the touch display device on the contact object can be referred to the following table:
the touch display device sequentially transmits 3 paths of first resonance signals: the first resonant signal X1, the first resonant signal X2, and the first resonant signal X3 are sequentially received by the resonant circuit 103 of the stylus pen 100, and the second resonant signal is taken as a current type, for example, it is assumed that the 3 second resonant signals are the first resonant current, the second resonant current, and the third resonant current, respectively;
1. when the first resonant current, the second resonant current, and the third resonant current are all the same, the touch display device may determine that the current contact object is the non-stylus pen 100, that is, the finger of the user.
2. When the first resonant current, the second resonant current, and the third resonant current received by the touch display device are not consistent, the first resonant current, the second resonant current, and the third resonant current received by the touch display device may have a smaller value (L), the touch display device only needs to obtain a reference resonant frequency X corresponding to the smaller value (L), and may determine which type of stylus 100 is currently used based on the reference resonant frequency, where the reference resonant frequency X corresponding to the smaller value (L) is f1, that is, the touch display device transmits the first resonant signal X1 at the resonant frequency f1, and receives the smaller value (that is, the first resonant circuit), and at this time, the touch display device may determine that the current contact object is the type a stylus 100.
In a possible embodiment, as shown in fig. 6, the resonant circuit 103 may be of the series resonant type, as follows:
that is, one end of the first resistor R1 is connected to the pen point 101 and obtains the at least two first resonance signals transmitted by the pen point 101, and the other end of the first resistor R1 is connected to the first capacitor C1;
the other end of the first capacitor C1 is connected to one end of the first inductor L1;
the other end of the first inductor L1 is connected to the pen body 102.
Further, the resonant circuit 103 included in the stylus pen 100 corresponds to a reference resonant frequency F during configuration, that is: the pen point 101 collects at least two first resonance signals sequentially transmitted by the touch display device 201, the at least two first resonance signals are transmitted to the resonance circuit 103 through the pen point 101, second resonance signals corresponding to the first resonance signals are generated at reference resonance frequencies corresponding to the resonance circuit 103 respectively, and the second resonance signals are output to the touch display device through the pen point 101.
For example, when the resonant circuit 103 is of a series resonant type, the first resonant signal has the following characteristics when a first resonant frequency corresponding to the first resonant signal is applied to the series resonant circuit:
1. when the first resonance frequency is equal to the reference resonance frequency, the impedance of the resonance circuit 103 is purely resistive and has a minimum value, and this characteristic can be understood as a filter or a trap in practical applications.
2. When the first resonant frequency is higher than the reference resonant frequency, the impedance of the resonant circuit 103 is inductive, which is equivalent to an inductor coil.
3. When the first resonant frequency is lower than the resonant frequency, the impedance of the resonant circuit 103 is capacitive, which is equivalent to a capacitor.
Further, when the first resonant frequency is equal to the reference resonant frequency, generally, the equivalent impedance in the circuit is minimum, and the current signal in the circuit is maximum (that is, the current is maximum), based on this characteristic, since the relevant parameters are already determined when the touch display device and the stylus 100 are produced, that is, the touch display device may store the first resonant frequency of the resonant circuit included in the stylus 100, the touch display device may transmit at least one first resonant signal at the reference resonant frequency "same as the first resonant frequency" in the detection period, and then transmit at least one first resonant signal at the reference resonant frequency "different from the first resonant frequency;
optionally, the second resonant signal may be a current type resonant signal, as follows:
when the stylus pen 100 is in contact with the touch display device 201, if a reference resonant frequency of a first resonant signal currently received by the stylus pen 100 is consistent with a first resonant frequency, at this time, a second resonant signal (assumed to be a first resonant current) generated by the resonant circuit 103 is generated, and at this time, a first resonant current fed back by the stylus pen 100 is received by the touch display device, because an equivalent impedance is minimum, and at this time, a current is relatively maximum, as shown in fig. 7, it is assumed that the touch display device sends two first resonant signals, and sends the first resonant signals at resonant frequencies f1 and f2, respectively; if the touch is performed by the stylus pen 100, the received first resonance current and the second resonance current are both maximum values;
when the user controls the finger to contact the touch display device 201, if the reference resonant frequency of the first resonant signal currently received by the stylus pen 100 is not consistent with the first resonant frequency, the second resonant signal (assumed to be a second resonant current) generated by the resonant circuit 103 is generated at this time, and at this time, the first resonant current fed back by the stylus pen 100 received by the touch display device is relatively maximum due to the minimum equivalent impedance, that is, the first resonant current is smaller than the second resonant current;
further, based on this characteristic, because the related parameters are already determined when the touch display device and the stylus 100 are produced, that is, the touch display device may store the first resonant frequency of the resonant circuit included in the stylus 100, in practical applications, when the number of the stylus 100 used in cooperation with the touch display device is n (n is a positive integer), the first resonant frequencies of the n stylus 100 are all inconsistent, the touch display device may implement accurate identification on the n stylus 100 based on the above manner, at this time, the number of paths of the first resonant signal transmitted by the touch display device is strongly related to the number of the stylus 100, specifically, the number of paths of the transmitted first resonant signal is consistent with the number of the stylus 100:
if the first resonant frequency of the type a stylus 100 is f1, the first resonant frequency of the type B stylus 100 is f2, and the first resonant frequency of the type C stylus 100 is f3, the touch display device sequentially transmits a first resonant signal X1 at a resonant frequency f1, a first resonant signal X2 at a resonant frequency f2, and a first resonant signal X3 at a resonant frequency f 3. The specific judgment of the touch display device on the contact object can be referred to the following table:
the touch display device sequentially transmits 3 paths of first resonance signals: the first resonant signal X1, the first resonant signal X2, and the first resonant signal X3 are sequentially received by the resonant circuit 103 of the stylus pen 100, and the second resonant signal is taken as a current type, for example, it is assumed that the 3 second resonant signals are the first resonant current, the second resonant current, and the third resonant current, respectively;
1. when the first resonant current, the second resonant current, and the third resonant current are all the same, the touch display device may determine that the current contact object is the non-stylus pen 100, that is, the finger of the user.
2. When the first resonant current, the second resonant current, and the third resonant current received by the touch display device are not consistent, the first resonant current, the second resonant current, and the third resonant current received by the touch display device may have a maximum value (H), the touch display device only needs to obtain a reference resonant frequency X corresponding to the maximum value (H), and may determine which type of stylus 100 is currently used based on the reference resonant frequency, where, for example, the reference resonant frequency X corresponding to the maximum value (H) is f1, that is, the touch display device transmits the first resonant signal X1 at the resonant frequency f1, and receives the maximum value (H) (that is, the first resonant circuit), and at this time, the touch display device may determine that the current contact object is the type a stylus 100.
In the following, a detailed explanation will be made in conjunction with a detection scheme corresponding to the touch display device side and the stylus 100, where the touch display device is generally a capacitive display screen, and based on the structure of the stylus 100, the touch display device side may adopt a "mutual capacitance detection scheme", specifically as follows:
mutual capacitance detection scheme: the capacitive touch screen adopts a mutual capacitance detection mode, namely, a node capacitance value at the intersection of a TX (sensor) and an RX (receiver) is detected, namely, a mutual capacitance value, the touch display equipment externally transmits a first resonance signal within corresponding sampling time, and the type of a contact object is judged through a second resonance signal fed back by the contact object after the detection signal is transmitted. Taking two touch pens 100 used with a touch display device as an example, the reference resonant frequency of the resonant circuit of the touch pen 1001 is f1, and the reference resonant frequency of the touch pen 1002 is f 2; the sampling timing sequence is shown in fig. 8, fig. 8 is a mutual capacitance sampling timing sequence diagram, fig. 8 is a diagram that a touch display device sequentially transmits two first resonance signals within a preset detection period, where the first resonance signals are transmitted outwards at a resonance frequency f1 and a resonance frequency f2, further, assuming that there are m TX (sensors) forming the touch display device and n RX (receivers) forming the touch display device, and assuming that the time required for acquiring the capacitances of all nodes on one TX (sensor) is T1, the time required for the touch display device to acquire the capacitances of all nodes on one side or one frame is (m × T1); it is usually necessary to collect the time required for "the resonant frequency f1 and the resonant frequency f2 to emit the first resonant signal" to the outside, which is 2 x (m x T1); that is, the touch display device can determine the type of the contact object generally at 2 × T1; the specific determination method is similar to the explanations of the above embodiments, and is not repeated here.
The touch display device may support the identification of a plurality of different types of touch pens 100 (specifically, touch pens 100 with different reference frequencies) by using a mutual capacitance detection scheme, and the touch pens 100 may be implemented by using any one of the above resonant circuits.
Optionally, the touch display device side may also adopt a "self-capacitance and mutual capacitance detection scheme", which is specifically as follows:
self-capacitance and mutual-capacitance detection schemes: the touch display device transmits a first resonance signal to the outside within corresponding sampling time, and determines the type of a contact object by detecting a second resonance signal fed back by the contact object after the signal is transmitted, and then calculates the coordinate of the contact object by using a mutual capacitance mode. Taking two touch pens 100 used with a touch display device as an example, the resonant circuit of the touch pen 1001 has a reference resonant frequency fself1The reference resonant frequency of stylus 1002 is fself2The mutual capacitance scanning frequency is selected to be different from the "reference resonant frequency of the resonant circuit corresponding to the stylus pen 100 used in cooperation", that is, the mutual capacitance scanning frequency fmutualThe sampling timing sequence is shown in fig. 9, fig. 9 is a sampling timing sequence combining mutual capacitance and self-capacitance, fig. 9 is a timing sequence obtained by sequentially transmitting 3 first resonance signals in a preset detection sampling period by the touch display device, wherein the two first resonance signals are externally transmitted at a resonance frequency f1 and a resonance frequency f2 respectively for determining the type of a contact object, and then the mutual capacitance scanning frequency f is used for determining the type of the contact objectmutualTransmitting a first resonant signal outwards, and further assuming that m TX (sensors) forming the touch display device and n RX (receivers) forming the touch display device are provided, assuming that the time required for acquiring the capacitance of all nodes on one TX (sensor) is T1, the time required for the touch display device to acquire the capacitance of all nodes on one side or one frame is (m × T1); acquiring a resonant frequency (e.g. ofResonant frequency f1, resonant frequency f2) (2 × T1), the time required to collect all data (e.g., the second resonant signal) is typically 2 × T1) + (m × T1) ═ m + 4T 1; that is, the touch display device can determine the type of the contact object and the touch position of the contact object on the touch display device at (m +4) T1; the specific determination method is similar to the explanations of the above embodiments, and is not repeated here.
The touch display device may support the identification of a plurality of different types of touch pens 100 (specifically, touch pens 100 with different reference frequencies) by using the self-capacitance and mutual-capacitance detection scheme, and the touch pens 100 may be implemented by using any one of the above resonant circuits.
In this application embodiment, the touch control pen includes nib, a body and resonant circuit, wherein: the pen body comprises an accommodating space; the pen head is connected with the pen body; the resonance circuit is configured in the accommodating space and is respectively connected with the pen point through the pen body; the pen point collects at least two paths of first resonance signals sequentially transmitted by the touch display equipment, the at least two paths of first resonance signals are transmitted to the resonance circuit through the pen point and respectively generate second resonance signals corresponding to the first resonance signals, and the second resonance signals are output to the touch display equipment through the pen point; the touch control pen can assist the touch control display equipment matched with the touch control pen to identify the touch control pen through the second resonance signal. Meanwhile, the touch pen is simple in structure, an additional touch hardware circuit (such as a receiving and transmitting function circuit) is not required to be arranged, and the touch display equipment can be conveniently assisted to realize the identification of the touch pen without arranging a power supply part in the touch pen; by adopting the embodiment of the application, based on the at least two first resonance signals and the second resonance signal corresponding to the first resonance signal, the differential identification of different touch pens and the corresponding differential operation among different touch pens can be realized, and the cost of the touch pens is low.
In one embodiment, as shown in fig. 10, there is further provided a stylus recognition system 300, where the stylus recognition system 300 includes the stylus 100 and the touch display device 201 mentioned in the above embodiments, and wherein:
the touch display device 201 is configured to sense the stylus pen 100 and sequentially transmit at least two first resonant signals;
the stylus pen 100 is configured to collect the at least two first resonance signals sequentially emitted by the touch display device 201, and generate a second resonance signal corresponding to the first resonance signal; and outputting the second resonance signal to the touch display device 201; wherein the touch display device 201 is configured to: in response to each of the received second resonant signals, the stylus pen 100 is identified.
Optionally, the touch display device 201 includes a signal comparator 2011, where the signal comparator 2011 is configured to respond to each received second resonant signal, and identify the stylus pen when each second resonant signal is inconsistent.
In an embodiment, as shown in fig. 11, an electronic device 1000 including the stylus recognition system 300 in the above embodiment is further disclosed in an embodiment of the present application. The electronic apparatus 1000 may be any apparatus having a screen display function. The electronic devices include, but are not limited to: a liquid crystal touch display device, a conference tablet, a personal computer, a tablet computer, an in-vehicle device, a computing device, or other processing device connected to a wireless modem, etc. Electronic devices in different networks may be called different names, such as: user equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user equipment, cellular telephone, cordless telephone, Personal Digital Assistant (PDA), electronic device in a 5G network or future evolution network, and the like.
In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.
Claims (10)
1. The utility model provides a touch-control pen for use with touch-control display device cooperation, its characterized in that includes nib, a body and resonant circuit, wherein:
the pen body comprises an accommodating space;
the pen head is connected with the pen body;
the resonance circuit is configured in the accommodating space and is respectively connected with the pen point and the pen body;
the pen point collects at least two paths of first resonance signals sequentially transmitted by the touch display equipment, the at least two paths of first resonance signals are transmitted to the resonance circuit through the pen point and respectively generate second resonance signals corresponding to the first resonance signals, and the second resonance signals are output to the touch display equipment through the pen point;
wherein the second resonance signal is used for the touch display device to identify the stylus.
2. The stylus of claim 1, wherein the resonant circuit comprises a first resistor, a first capacitor, and a first inductor, wherein:
one end of the first resistor is connected to the pen point and one end of the first capacitor and acquires the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first resistor is connected to the pen body and the other end of the first capacitor;
one end of the first capacitor is connected to the pen point and one end of the first inductor and acquires the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first capacitor is connected to the pen body and the other end of the first inductor;
one end of the first inductor is connected to the pen point and one end of the first resistor and obtains the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first inductor is connected to the pen body and the other end of the first resistor.
3. The stylus of claim 1, wherein the resonant circuit comprises a first resistor, a first capacitor, and a first inductor, wherein:
one end of the first resistor is connected to the pen point and acquires the at least two paths of first resonance signals transmitted by the pen point, and the other end of the first resistor is connected with the first capacitor;
the other end of the first capacitor is connected with one end of the first inductor;
the other end of the first inductor is connected with the pen body.
4. The stylus of claim 1, wherein the resonant circuit generates a second resonant signal corresponding to the first resonant signal at a reference resonant frequency corresponding to the resonant circuit.
5. The stylus pen of claim 4, wherein the resonant frequencies corresponding to the at least two first resonant signals include the reference resonant frequency.
6. The stylus according to claim 2, wherein the resonant circuit obtains the at least two first resonant signals sequentially transmitted through the stylus head, and generates a first resonant current when a resonant frequency corresponding to the first resonant signal is a reference resonant frequency; or the like, or, alternatively,
when the resonant frequency corresponding to the first resonant signal is not the reference resonant frequency, generating a second resonant current;
wherein the first resonant current is less than the second resonant current.
7. The stylus according to claim 3, wherein the resonant circuit obtains the at least two first resonant signals sequentially transmitted through the stylus head, and generates a first resonant current when a resonant frequency corresponding to the first resonant signal is a reference resonant frequency; or the like, or, alternatively,
when the resonant frequency corresponding to the first resonant signal is not the reference resonant frequency, generating a second resonant current;
wherein the first resonant current is greater than the second resonant current.
8. A stylus recognition system comprising the stylus according to any one of claims 1 to 7 and the touch display device, wherein:
the touch display device is configured to sense the touch pen and sequentially transmit at least two paths of first resonance signals;
the touch control pen is configured to collect the at least two paths of first resonance signals sequentially emitted by the touch control display equipment and generate second resonance signals corresponding to the first resonance signals; and the number of the first and second groups,
outputting the second resonance signal to the touch display device;
wherein the touch display device is configured to: identifying the stylus in response to each received second resonant signal.
9. The stylus recognition system of claim 8, wherein the touch display device comprises a signal comparator, wherein:
the signal comparator is configured to respond to the received second resonance signals, and identify the stylus pen when the second resonance signals are inconsistent.
10. An electronic device comprising the stylus recognition system of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021871128.2U CN213482840U (en) | 2020-08-31 | 2020-08-31 | Touch pen, touch pen identification system and electronic equipment |
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| CN202021871128.2U CN213482840U (en) | 2020-08-31 | 2020-08-31 | Touch pen, touch pen identification system and electronic equipment |
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