CN110134281B - Capacitance detection system and method - Google Patents
Capacitance detection system and method Download PDFInfo
- Publication number
- CN110134281B CN110134281B CN201910409216.6A CN201910409216A CN110134281B CN 110134281 B CN110134281 B CN 110134281B CN 201910409216 A CN201910409216 A CN 201910409216A CN 110134281 B CN110134281 B CN 110134281B
- Authority
- CN
- China
- Prior art keywords
- capacitance
- layer
- sensing
- sensing layer
- capacitance value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The invention discloses a capacitance detection system and a method, wherein the system comprises: a capacitive sensor and a detection unit; the capacitance sensor is used for generating a first induction capacitance value and a second induction capacitance value when receiving an operation instruction; the detection unit is used for detecting the first induction capacitance value and the second induction capacitance value, calculating the first induction capacitance value and the first fixed capacitance value to obtain a first capacitance variation, calculating the second induction capacitance value and the second fixed capacitance value to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type. By applying the system provided by the invention, the induction capacitance value of the capacitive sensor is detected, the induction capacitance value and the fixed capacitance value are calculated to obtain the calculated value, the operation type of the operation instruction is determined according to the calculated value, the misjudgment of the touch screen is avoided, and the human-computer interaction experience of the touch screen is improved.
Description
Technical Field
The invention relates to the field of detection, in particular to a capacitance detection system and a capacitance detection method.
Background
In recent years, the touch screen industry is rapidly developed, products related to the touch screen industry become hand robbers in the market, the touch screen serves as an input device, a user can touch a displayed object and the like to control the touch screen, and therefore human-computer interaction is simpler, more visual and more humanized. The touch screen is divided into a capacitive touch screen and a resistive touch screen, the capacitive touch screen is mainly applied to a capacitance detection technology of a capacitance sensor, and the current capacitance detection technology is divided into self-capacitance detection and mutual capacitance detection.
The inventor researches and discovers that when a capacitive sensor in the existing touch screen works, no matter self-capacitance detection or mutual capacitance detection is carried out, only touch of an operator can be recognized, whether the operator is a conductor or a non-conductor cannot be distinguished, and whether the operator is close, normally touched or forcefully touched, so that misjudgment on the touch screen is formed, and user experience is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a capacitance detection system and a capacitance detection method, wherein the sensing capacitance value of a capacitance sensor is detected, the sensing capacitance value and a pre-acquired fixed capacitance value are calculated, the operation type of the capacitance sensor is determined according to the result obtained by calculation, the misjudgment of a touch screen is avoided, and the human-computer interaction experience of the touch screen is improved.
A capacitance detection system, comprising:
a capacitive sensor and a detection unit;
the capacitance sensor is connected with the detection unit;
the capacitance sensor is used for generating a first induction capacitance value and a second induction capacitance value corresponding to an operation instruction when the operation instruction is received;
the detection unit is used for detecting the first induction capacitance value and the second induction capacitance value, calculating the first induction capacitance value and a first fixed capacitance value acquired in advance to obtain a first capacitance variation, calculating the second induction capacitance value and a second fixed capacitance value acquired in advance to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type.
The above system, optionally, the capacitive sensor, comprises:
the protective cover plate, the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer are sequentially arranged;
the protective cover plate is used for protecting the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer;
the capacitance sensing layer is positioned at the lower side of the protective cover plate and used for judging whether the capacitance sensing layer is of a self-capacitance structure or not, if the capacitance sensing layer is of the self-capacitance structure, a first fixed capacitor is formed between the capacitance sensing layer and the shielding layer, if the capacitance sensing layer is not of the self-capacitance structure, a first fixed capacitor is formed between a transmitting electrode and a receiving electrode in the capacitance sensing layer, and when the operation instruction is received, a first sensing capacitor corresponding to the operation instruction is generated according to the first fixed capacitor;
the insulating layer is positioned at the lower side of the capacitance sensing layer and is used for isolating the capacitance sensing layer from a system ground;
the shielding layer is positioned at the lower side of the insulating layer and used for electrically isolating the capacitance sensing layer from the pressure sensing layer;
the buffer layer is positioned between the shielding layer and the pressure sensing layer and is used for forming a space between the shielding layer and the pressure sensing layer and changing the space between the shielding layer and the pressure sensing layer when an operation instruction is received;
the pressure sensing layer is used for forming the second sensing capacitor between the pressure sensing layer and the shielding layer, and a second sensing capacitance value is generated after the buffer layer deforms.
The above system, optionally, the capacitive sensor, further includes:
a substrate;
the substrate is positioned on the lower side of the pressure sensing layer and used for supporting the protective cover plate, the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer in the capacitance sensor.
The above system, optionally, the detection unit includes:
the device comprises a capacitance detection group, a shielding module, a judgment module and an output module;
the first end of the capacitance detection group is respectively connected with a capacitance sensing layer and a pressure sensing layer of the capacitance sensor and is used for detecting the first sensing capacitance value and the second sensing capacitance value and sending the first sensing capacitance value and the second sensing capacitance value to the judgment module;
the shielding module is connected with the shielding layer of the capacitive sensor and used for providing shielding potential for the shielding layer of the capacitive sensor;
the first end of the judging module is connected with the second end of the capacitance detection group and is used for calculating the first induction capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, calculating the second induction capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and sending the operation type to the output module;
and the output module is connected with the second end of the judgment module and used for generating a control instruction corresponding to the operation type according to the operation type and outputting the control instruction.
The above system, optionally, the capacitance detection group includes:
the device comprises a first capacitance detection module and a second capacitance detection module;
the first end of the first capacitance detection module is connected with the capacitance sensing layer, and the second end of the first capacitance detection module is connected with the judgment module and used for detecting the first sensing capacitance value;
and the first end of the second capacitance detection module is connected with the pressure sensing layer, and the second end of the second capacitance detection module is connected with the judgment module and is used for detecting the second sensing capacitance value.
The above system, optionally, the capacitance detection group includes:
the circuit comprises a first switch, a second switch, a time sequence control module and a third capacitance detection module;
the first end of the first switch is connected with the capacitance sensing layer, and the second end of the first switch is connected with the first end of the third capacitance detection module;
the first end of the second switch is connected with the pressure sensing layer, and the second end of the second switch is connected with the first end of the third capacitance detection module;
one end of the time sequence control module is connected with the third end of the first switch, and the other end of the time sequence control module is connected with the third end of the second switch, and is used for controlling the on-off of the first switch and the second switch;
and the second end of the third capacitance detection module is connected with the judgment module.
A capacitance detection method, comprising: the capacitance detection method is suitable for the capacitance detection system, and comprises the following steps:
when the capacitive sensor receives an operation instruction, acquiring a first induction capacitance value and a second induction capacitance value which are generated by the capacitive sensor and correspond to the operation instruction;
calculating the first induction capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, and calculating the second induction capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation;
and determining the operation type corresponding to the operation instruction received by the capacitance sensor according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type to execute the operation corresponding to the control instruction.
Optionally, in the method, determining, according to the first capacitance variation and the second capacitance variation, an operation type corresponding to the operation instruction received by the capacitance sensor includes:
comparing the first capacitance variation with a preset first threshold to obtain a first comparison result;
comparing the second capacitance variation with a preset second threshold to obtain a second comparison result;
and determining the operation type corresponding to the operation instruction received by the capacitive sensor according to the first comparison result and the second comparison result.
A storage medium comprising stored instructions, wherein the instructions, when executed, control a device in which the storage medium is located to perform the capacitance detection method.
An electronic device comprising a memory, and one or more instructions, wherein the one or more instructions are stored in the memory and configured to be executed by one or more processors to perform the capacitance detection method described above.
Compared with the prior art, the invention has the following advantages:
the invention discloses a capacitance detection system and a method, wherein the system comprises: a capacitive sensor and a detection unit; the capacitance sensor is connected with the detection unit; the capacitance sensor is used for generating a first induction capacitance value and a second induction capacitance value corresponding to an operation instruction when the operation instruction is received; the detection unit is used for detecting the first induction capacitance value and the second induction capacitance value, calculating the first induction capacitance value and a first fixed capacitance value acquired in advance to obtain a first capacitance variation, calculating the second induction capacitance value and a second fixed capacitance value acquired in advance to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type. By applying the capacitance detection system provided by the invention, the sensing capacitance value of the capacitance sensor is detected, the sensing capacitance value and the pre-acquired fixed capacitance value are calculated to obtain the capacitance variation, the operation type of the operation capacitance sensor is determined according to the capacitance variation, the misjudgment of the touch screen is avoided, and the human-computer interaction experience of the touch screen is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic system structure diagram of a capacitance detection system according to the present invention;
FIG. 2 is an exemplary diagram of a capacitance detection system provided by the present invention;
FIG. 3 is a diagram of another exemplary capacitive sensing system according to the present invention;
FIG. 4 is a diagram of another exemplary capacitive sensing system according to the present invention;
FIG. 5 is a diagram of another exemplary capacitive sensing system according to the present invention;
FIG. 6 is a diagram of another exemplary capacitive sensing system according to the present invention;
FIG. 7 is a flowchart of a method of capacitance detection according to the present invention;
fig. 8 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
An embodiment of the present invention provides a capacitance detection system, where an execution main body of the system may be a processor running in various mobile devices, and a system structure diagram of the system is shown in fig. 1, and specifically includes:
the capacitive sensor 101: the device comprises a first sensing capacitor, a second sensing capacitor and a control circuit, wherein the first sensing capacitor and the second sensing capacitor are used for generating a first sensing capacitance value and a second sensing capacitance value corresponding to an operation instruction when the operation instruction is received;
according to the system provided by the embodiment of the invention, when an operator approaches or contacts the capacitive sensor, namely the capacitive sensor receives an operation instruction, the capacitive sensor generates a first induction capacitance value and a second induction capacitance value corresponding to the operation instruction, wherein the operation type of the operator can be conductor approach induction, normal conductor touch, conductor forced touch and insulator forced touch.
The detection unit 102: the detection circuit is used for detecting the first induction capacitance value and the second induction capacitance value, calculating the first induction capacitance value and a first fixed capacitance value acquired in advance to obtain a first capacitance variation, calculating the second induction capacitance value and a second fixed capacitance value acquired in advance to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type.
In the system provided by the embodiment of the present invention, the detecting unit 102 is connected to the capacitive sensor 101, and is configured to detect a first induced capacitance value and a second induced capacitance value generated by the capacitive sensor, and calculating the detected first sensing capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, and calculating the detected second sensing capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation, wherein the first sensing capacitance and the first fixed capacitance are calculated, and the second sensing capacitance and the second fixed capacitance are calculated, the difference between the first sensing capacitor and the first fixed capacitor is calculated, and the absolute value of the result of the difference calculation is taken, calculating the difference value of the second sensing capacitor and the second fixed capacitor, and taking an absolute value of the result after the difference value calculation; and comparing the first capacitance variation and the second capacitance variation obtained by calculation with corresponding threshold values respectively, so as to determine an operation type corresponding to the operation instruction, wherein the operation type comprises conductor approach induction, normal conductor touch, conductor forced touch and insulator forced touch, and outputting a control instruction corresponding to the operation type.
The capacitance detection system provided by the embodiment of the invention comprises a capacitance sensor and a detection unit, when an operation object approaches or contacts the capacitance sensor, namely the capacitance sensor receives an operation instruction, the capacitance sensor generates a first induction capacitance value and a second induction capacitance value, the detection unit is used for detecting the first induction capacitance value and the second induction capacitance value generated by the capacitance sensor, calculating the detected first induction capacitance value and a first fixed capacitance value acquired in advance to obtain a first capacitance variation, calculating the detected second induction capacitance value and a second fixed capacitance value acquired in advance to obtain a second capacitance variation, and determining an operation type corresponding to the operation instruction for operating the capacitance sensor according to the first capacitance variation and the second capacitance variation, wherein the operation type is a type of object contact or induction and comprises a conductor approaching induction, a conductor approaching induction and a conductor approaching induction, Normal conductor touch, conductor hard touch, and insulator hard touch. By applying the capacitance detection system provided by the embodiment of the invention, the sensing capacitance value of the capacitance sensor is detected, the sensing capacitance value and the pre-acquired fixed capacitance value are calculated to obtain the capacitance variation, the operation type of the operation capacitance sensor is determined according to the capacitance variation, the misjudgment of the touch screen is avoided, and the human-computer interaction experience of the touch screen is improved.
The capacitive sensor 101 disclosed in fig. 1 of the above embodiment of the present invention includes:
the protective cover plate, the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer are sequentially arranged;
the protective cover plate is used for protecting the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer;
the capacitance sensing layer is positioned on the lower side of the protective cover plate and used for judging whether the capacitance sensing layer is of a self-capacitance structure or not, if the capacitance sensing layer is of the self-capacitance structure, a first fixed capacitor is formed between the capacitance sensing layer and the shielding layer, if the capacitance sensing layer is not of the self-capacitance structure, a first fixed capacitor is formed between a transmitting electrode and a receiving electrode in the capacitance sensing layer, and when the operation instruction is received, a first sensing capacitor corresponding to the operation instruction is generated according to the first fixed capacitor;
the insulating layer is positioned at the lower side of the capacitance sensing layer and is used for isolating the capacitance sensing layer from a system ground;
the shielding layer is positioned at the lower side of the insulating layer and used for electrically isolating the capacitance sensing layer from the pressure sensing layer;
the buffer layer is positioned between the shielding layer and the pressure sensing layer and is used for forming a space between the shielding layer and the pressure sensing layer and changing the space between the shielding layer and the pressure sensing layer when an operation instruction is received;
the pressure sensing layer is used for forming the second sensing capacitor between the pressure sensing layer and the shielding layer, and a second sensing capacitance value is generated after the buffer layer deforms.
In the system provided by the embodiment of the invention, the capacitive sensor comprises a protective cover plate, a capacitive sensing layer, an insulating layer, a shielding layer, a buffer layer and a pressure sensing layer which are sequentially arranged, and the capacitive sensor further comprises a substrate which is positioned at the lower side of the pressure sensing layer and is used for supporting the structure in the capacitive sensor, namely supporting the protective cover plate, the capacitive sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer in the capacitive sensor; the protective cover plate in the capacitive sensor is the top of the capacitive sensor and is used for protecting the structure below the protective cover plate from being polluted by water and oil stains or other mechanical damages, and the protective cover plate can be made of glass, acrylic, plastic and other materials; the capacitance sensing layer can be a self-capacitance structure or a mutual capacitance structure, when the capacitance sensing layer is of the self-capacitance structure, a first fixed capacitor is formed between a capacitance polar plate of the capacitance sensing layer and a shielding layer, the shielding layer is connected with a shielding module of the detection unit, the shielding module of the detection unit provides shielding potential for the shielding layer so as to form a first fixed capacitor between the capacitance sensing layer and the shielding layer, and when an operation instruction is received, the first fixed capacitor is equivalent to a capacitor connected in parallel with the first fixed capacitor, namely a first sensing capacitance value is generated; when the capacitance sensing layer is of a mutual capacitance structure, a first fixed capacitor is formed between the transmitting electrode and the receiving electrode in the capacitance sensing layer, and when an operation instruction is received, the capacitor formed between the capacitor plates changes, so that a first sensing capacitance value is generated.
It should be noted that the capacitance sensing layer may be a single self-capacitance structure or a single mutual capacitance structure to implement single-key detection, or may be a plurality of self-capacitance structures or a plurality of mutual capacitance structures to implement sliding detection or touch coordinate detection.
The insulating layer is positioned at the lower side of the capacitance sensing layer and used for isolating the capacitance sensing layer from a system ground so as to prevent the capacitance sensing layer from being short-circuited with the ground, and the material of the insulating layer can be insulating glue; the shielding layer is positioned at the lower side of the insulating layer, the material of the shielding layer can be metal and is used for electrically isolating the capacitance sensing layer from the pressure sensing layer, the shielding layer needs to be connected to a fixed potential of a system, and a shielding module of the detection unit provides a shielding potential; the buffer layer is positioned between the shielding layer and the pressure sensing layer, when an operation instruction is received, the buffer layer is displaced up and down, so that the distance between the shielding layer and the pressure sensing layer is changed, the capacitance value between the shielding layer and the pressure sensing layer is changed, a second sensing capacitance value is generated, a second fixed capacitor is formed between the shielding layer and the pressure sensing layer in an initial state, namely when the operation instruction is not received, and the buffer layer can be made of foam; the material of the pressure sensing layer can be a metal plate, and the second sensing capacitance value changes along with the change of the distance between the shielding layer and the pressure sensing layer.
The detecting unit 102 disclosed in fig. 1 of the above embodiment of the present invention includes:
the device comprises a capacitance detection group, a shielding module, a judgment module and an output module;
the first end of the capacitance detection group is respectively connected with a capacitance sensing layer and a pressure sensing layer of the capacitance sensor and is used for detecting the first sensing capacitance value and the second sensing capacitance value and sending the first sensing capacitance value and the second sensing capacitance value to the judgment module;
the shielding module is connected with the shielding layer of the capacitive sensor and used for providing shielding potential for the shielding layer of the capacitive sensor;
the first end of the judging module is connected with the second end of the capacitance detecting group and is used for calculating the first induction capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, calculating the second induction capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and sending the operation type to the output module;
and the output module is connected with the second end of the judgment module and used for generating a control instruction corresponding to the operation type according to the operation type and outputting the control instruction.
In the system provided in the embodiment of the present invention, the capacitance detection module group may include: the first end of the first capacitance detection module is connected with the capacitance sensing layer, and the second end of the first capacitance detection module is connected with the judgment module and used for detecting a first sensing capacitance value; the first end of the second capacitance detection module is connected with the pressure sensing layer, and the second end of the second capacitance detection module is connected with the judgment module and used for detecting a second sensing capacitance value.
The capacitance detection module may also include: the circuit comprises a first switch, a second switch, a time sequence control module and a third capacitance detection module; the first end of the first switch is connected with the capacitance sensing layer, and the second end of the first switch is connected with the first end of the third capacitance detection module; the first end of the second switch is connected with the pressure sensing layer, and the second end of the second switch is connected with the first end of the third capacitance detection module; one end of the time sequence control module is connected with the third end of the first switch, the other end of the time sequence control module is connected with the third end of the second switch, and the time sequence control module is used for controlling the on-off of the first switch and the second switch, for example, when the time sequence control module outputs a high level, the first switch is closed, the second switch is opened, the third capacitance detection module is used for detecting a first capacitance sensing value, when the time sequence control module outputs a low level, the first switch is opened, the second switch is closed, and the third capacitance detection module is used for detecting a second sensing capacitance value; and the second end of the third capacitance detection module is connected with the judgment module.
When the judging module receives the first sensing capacitance value and the second sensing capacitance value sent by the capacitance detecting module group, the first sensing capacitance value and the first fixed capacitance value obtained in advance are calculated, the calculation can be that the first sensing capacitance value and the first fixed capacitance value obtained in advance are subjected to difference operation, an absolute value is obtained from a result of the difference operation to obtain a first capacitance variation, the second sensing capacitance value and the second fixed capacitance value obtained in advance are subjected to difference operation, an absolute value is obtained from a result of the difference operation to obtain a second capacitance variation, the first capacitance variation is compared with a first threshold, and the second capacitance variation is compared with a second threshold to determine an operation type corresponding to an operation instruction, wherein the operation type comprises conductor proximity induction, normal conductor touch, conductor forced touch and insulator forced touch, and the operation type corresponding to the operation instruction is sent to an output module, the output module outputs a control instruction corresponding to the operation type according to the operation type, and the control instruction can be different lighting modes, different audios or different display results and the like.
The specific judgment process of the judgment module is exemplified as follows:
the first threshold is TH1, and the second threshold is TH2
When the judgment module receives a first sensing capacitance value C1 'and a second sensing capacitance value C2' sent by the capacitance detection module group, the first sensing capacitance value C1 'and a first fixed capacitance value C1 are subjected to difference operation, an absolute value of a result obtained after the difference operation is obtained, a first capacitance variation delta C1 is obtained, a second sensing capacitance value C2' and a second fixed capacitance value C2 are subjected to difference operation, an absolute value of a result obtained after the difference operation is obtained, and a second capacitance variation delta C2 is obtained;
when a finger (or conductor) is normally in contact but not touched with force, the change of C1 'relative to C1 is large, Δ C1 is large, Δ C1> TH1, and the change of C2' relative to C2 is small due to the small pressure of the normal contact, Δ C2< TH 2;
when a finger (or conductor) touches strongly, the change of C1 'relative to C1 is large, Δ C1 is large, Δ C1> TH1, the change of C2' relative to C2 is large due to the large pressure of the touch strongly, Δ C2> TH 2;
when the insulator is touched with force, the influence on C1 ' is small due to the small dielectric constant of the insulating object, the change of C1 ' relative to C1 is small, Δ C1 is small, Δ C1< TH1, the change of C2 ' relative to C2 is large due to the large pressure of the touch with force, and Δ C2> TH 2;
namely, when Δ C1< TH1 and Δ C2< TH2, the operation type is judged to be finger (or conductor) contact induction;
when Δ C1> TH1, and Δ C2< TH2, it is determined that the operation type is normal touch of a finger (or a conductor);
when the delta C1 is more than TH1, and the delta C2 is more than TH2, judging that the operation type is finger (or conductor) touch;
when Δ C1< TH1, and Δ C2> TH2, it is determined that the operation type is insulator hard touch.
It should be noted that, the modules and structures of the capacitance detection system provided by the embodiment of the present invention may be adhered together by glue, or may be formed into an integral body by pressing.
In the method provided by the embodiment of the present invention, the implementation of the capacitance detection system is exemplified as follows:
for example, as shown in fig. 2:
the capacitance sensing layer adopts a single self-capacitance structure, a first fixed capacitor is formed between the capacitance sensing layer and the shielding layer, a second fixed capacitor is formed between the pressure sensing layer and the shielding layer, the capacitance sensing layer is directly connected with a first capacitance detection module for generating a first sensing capacitance value, the pressure sensing layer module is directly connected with a second capacitance detection module for generating a second sensing capacitance value, when a conductor or an insulator approaches or touches a sensor protection cover plate, the first capacitance detection module detects a first sensing capacitance value C1 ', the second capacitance detection module detects a second sensing capacitance value C2', the first capacitance detection module sends C1 'to the judgment module, the second capacitance detection unit sends C2' to the judgment module, the judgment module firstly calculates the variation delta C2 of the variation delta C1 and C2 'of the C1' and determines the threshold interval where the delta C1 and the delta C2 are located, thereby determining whether a conductor is proximity sensitive, a conductor is normally touched, a conductor is strongly touched, or an insulator is strongly touched.
For example two, as shown in fig. 3:
the capacitance sensing layer adopts a single self-capacitance structure, a first fixed capacitor is formed between the capacitance sensing layer and the shielding layer, a second fixed capacitor is formed between the pressure sensing layer and the shielding layer, the capacitance sensing layer is connected with a third capacitance detection module through a first switch for generating a first sensing capacitance value, the pressure sensing layer module is connected with the third capacitance detection module through a second switch for generating a second sensing capacitance value, when the first switch is closed and the second switch is opened, the third capacitance detection module detects a first sensing capacitance value C1 'generated by the capacitance sensing layer, when the first switch is opened and the second switch is closed, the third capacitance detection module detects a second sensing capacitance value C2' generated by the pressure sensing layer, the third capacitance detection module sends C1 'and C2' to the judgment module, the judgment module firstly calculates the variation delta C1 of C1 'and the variation delta C2 of C2', and judging the threshold intervals of the delta C1 and the delta C2, thereby determining that the conductor is close to induction, normally touches the conductor, strongly touches the conductor or strongly touches the insulator.
It should be noted that, in the system provided in the embodiment of the present invention, the capacitance sensing layer may also adopt a single mutual capacitance structure, when the capacitance sensing layer of the capacitance sensor is a mutual capacitance, a schematic structural diagram of the capacitance sensing layer is shown in fig. 4, and when the mutual capacitance structure is adopted, a first fixed capacitance is formed between the transmitting electrode and the receiving electrode in the capacitance sensing layer.
It should be noted that, in the system provided in the embodiment of the present invention, the capacitance sensing layer of the capacitance sensor may adopt a combination of multiple self-capacitances, as shown in fig. 5, when the capacitance sensing layer is a multiple self-capacitance structure, an electrode plate of each self-capacitance structure forms a fixed capacitance with the shielding layer, each fixed capacitance needs to be detected separately, and the first fixed capacitance is obtained according to the detected multiple fixed capacitances. The capacitance CF in the figure is equivalent to a second fixed capacitance C2 in a single self-capacitance structure, and the combination of a plurality of self-capacitances can be used for realizing sliding detection or touch coordinate detection; the capacitance sensing layer may also adopt a combination of a plurality of mutual capacitances, as shown in fig. 6, when the capacitance sensing layer is a plurality of mutual capacitance structures, a fixed capacitance is formed between a transmitting electrode and a receiving electrode of each mutual capacitance structure, each fixed capacitance needs to be detected separately, and a first fixed capacitance is obtained according to a plurality of detected fixed capacitances, a capacitance CF in the figure is equivalent to a second fixed capacitance C2 in a single mutual capacitance structure, and a sliding detection or a touch coordinate detection can be realized by adopting a combination of a plurality of mutual capacitances.
An embodiment of the present invention provides a capacitance detection method, which may be applied to a plurality of system platforms, where an execution main body of the method may be a processor operating in a detection unit of various mobile devices, and a flowchart of the method is shown in fig. 7, and specifically includes:
s201: when the capacitive sensor receives an operation instruction, acquiring a first induction capacitance value and a second induction capacitance value which are generated by the capacitive sensor and correspond to the operation instruction;
in the method provided by the embodiment of the invention, when the capacitive sensor receives the operation instruction, the capacitive sensing layer of the capacitive sensor generates a first sensing capacitance value, the pressure sensing layer of the capacitive sensor generates a second sensing capacitance value, and the detection unit detects the first sensing capacitance value and the second sensing capacitance value.
S202: calculating the first induction capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, and calculating the second induction capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation;
in the method provided by the embodiment of the present invention, the first sensing capacitance value and the first fixed capacitance value obtained in advance are calculated to obtain a first capacitance variation, where the first capacitance variation may be an absolute value of a difference between the first sensing capacitance value and the first fixed capacitance value, and the second sensing capacitance value and the second fixed capacitance value obtained in advance are calculated to obtain a second capacitance variation, where the second capacitance variation may be an absolute value of a difference between the second sensing capacitance value and the second fixed capacitance value.
S203: and determining the operation type corresponding to the operation instruction received by the capacitance sensor according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type to execute the operation corresponding to the control instruction.
In the method provided by the embodiment of the invention, the first capacitance variation and the first threshold are compared, the second capacitance variation and the second threshold are compared, and the operation type corresponding to the operation instruction is determined according to the comparison result, wherein the operation type can be conductor approach induction, normal conductor touch, conductor forced touch and insulator forced touch, and a control instruction corresponding to the operation type is generated according to the operation type, and different control instructions are generated according to different operation types, wherein the control instruction can be a light-up mode, an audio output mode and the like.
In the capacitance detection method provided by the embodiment of the invention, when the capacitance sensor receives an operation instruction, the capacitance sensing layer of the capacitance sensor generates a first sensing capacitance value, the pressure sensing layer of the capacitance sensor generates a second sensing capacitance value, the detection unit detects the first sensing capacitance value and the second sensing capacitance value, calculates the first sensing capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, calculates the second sensing capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation, compares the first capacitance variation with the first threshold value, compares the second capacitance variation with the second threshold value, and determines an operation type corresponding to the operation instruction according to the comparison result, wherein the operation type can be that a conductor is close to sensing, normally touches the conductor, touches the conductor with force and touches with force with an insulator, and generating a control instruction corresponding to the operation type according to the operation type, and generating different control instructions according to different operation types, wherein the control instruction can be a lighting mode, audio output and the like. By applying the capacitance detection method provided by the invention, the sensing capacitance value of the capacitance sensor is detected, the sensing capacitance value and the pre-acquired fixed capacitance value are calculated to obtain the capacitance variation, the operation type of the operation capacitance sensor is determined according to the capacitance variation, the misjudgment of the touch screen is avoided, and the human-computer interaction experience of the touch screen is improved.
As mentioned above in relation to step S203 disclosed in fig. 7 of the embodiment of the present invention, determining the operation type corresponding to the operation instruction received by the capacitive sensor according to the first capacitance variation and the second capacitance variation includes the following steps:
comparing the first capacitance variation with a preset first threshold to obtain a first comparison result;
comparing the second capacitance variation with a preset second threshold to obtain a second comparison result;
and determining the operation type corresponding to the operation instruction received by the capacitive sensor according to the first comparison result and the second comparison result.
In the method provided by the embodiment of the invention, when the first capacitance variation is smaller than a first threshold and the second capacitance variation is smaller than a second threshold, it is determined that the operation type corresponding to the operation instruction received by the capacitance sensor is conductor approach induction; when the first capacitance variation is larger than a first threshold value and the second capacitance variation is smaller than a second threshold value, determining that the operation type corresponding to the operation instruction received by the capacitive sensor is normal conductor touch; when the first capacitance variation is larger than a first threshold value and the second capacitance variation is larger than a second threshold value, determining that the operation type corresponding to the operation instruction received by the capacitive sensor is conductor forced touch; and when the first capacitance variation is smaller than a first threshold value and the second capacitance variation is larger than a second threshold value, determining that the operation type corresponding to the operation instruction received by the capacitive sensor is insulator forceful touch.
The embodiment of the invention also provides a storage medium, which comprises a stored instruction, wherein when the instruction runs, the device where the storage medium is located is controlled to execute the capacitance detection method.
An electronic device is further provided, and its schematic structural diagram is shown in fig. 8, and specifically includes a memory 301 and one or more instructions 302, where the one or more instructions 302 are stored in the memory 301, and are configured to be executed by one or more processors 303 to perform the following operations:
when the capacitive sensor receives an operation instruction, acquiring a first induction capacitance value and a second induction capacitance value which are generated by the capacitive sensor and correspond to the operation instruction;
calculating the first induction capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, and calculating the second induction capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation;
and determining the operation type corresponding to the operation instruction received by the capacitance sensor according to the first capacitance variation and the second capacitance variation, and outputting a control instruction corresponding to the operation type to execute the operation corresponding to the control instruction.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and reference may be made to the partial description of the method embodiment for relevant points.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
For convenience of description, the above devices are described as being divided into various units by function, respectively. Of course, the functions of the units may be implemented in the same software and/or hardware or in a plurality of software and/or hardware when implementing the invention.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The present invention provides a capacitance detection system and method, which has been described in detail above, and the principle and implementation of the present invention are explained in detail herein by using specific examples, and the description of the above examples is only used to help understanding the method and core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. A capacitance detection system, comprising:
a capacitive sensor and a detection unit;
the capacitance sensor is connected with the detection unit;
the capacitance sensor is used for generating a first induction capacitance value and a second induction capacitance value corresponding to an operation instruction when the operation instruction is received;
the detection unit is configured to detect the first sensing capacitance value and the second sensing capacitance value, calculate the first sensing capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, calculate the second sensing capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation, compare the second capacitance variation with a threshold according to the first capacitance variation and the second capacitance variation, determine an operation type corresponding to the operation instruction according to a comparison result, and output a control instruction corresponding to the operation type;
the capacitive sensor includes: the protective cover plate, the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer are sequentially arranged; the protective cover plate is used for protecting the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer;
the capacitance sensing layer is positioned on the lower side of the protective cover plate and used for judging whether the capacitance sensing layer is of a self-capacitance structure or not, if the capacitance sensing layer is of the self-capacitance structure, a first fixed capacitor is formed between the capacitance sensing layer and the shielding layer, if the capacitance sensing layer is not of the self-capacitance structure, a first fixed capacitor is formed between a transmitting electrode and a receiving electrode in the capacitance sensing layer, and when the operation instruction is received, a first sensing capacitor corresponding to the operation instruction is generated according to the first fixed capacitor;
the insulating layer is positioned at the lower side of the capacitance sensing layer and is used for isolating the capacitance sensing layer from a system ground;
the shielding layer is positioned on the lower side of the insulating layer and used for electrically isolating the capacitance sensing layer from the pressure sensing layer;
the buffer layer is positioned between the shielding layer and the pressure sensing layer and is used for forming a space between the shielding layer and the pressure sensing layer and changing the space between the shielding layer and the pressure sensing layer when an operation instruction is received;
the pressure sensing layer is used for forming the second sensing capacitor between the pressure sensing layer and the shielding layer, and a second sensing capacitance value is generated after the buffer layer deforms.
2. The system of claim 1, wherein the capacitive sensor further comprises: a substrate;
the substrate is positioned on the lower side of the pressure sensing layer and used for supporting the protective cover plate, the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer in the capacitance sensor.
3. The system of claim 1, wherein the detection unit comprises:
the device comprises a capacitance detection group, a shielding module, a judgment module and an output module;
the first end of the capacitance detection group is respectively connected with a capacitance sensing layer and a pressure sensing layer of the capacitance sensor and is used for detecting the first sensing capacitance value and the second sensing capacitance value and sending the first sensing capacitance value and the second sensing capacitance value to the judgment module;
the shielding module is connected with the shielding layer of the capacitive sensor and used for providing shielding potential for the shielding layer of the capacitive sensor;
the first end of the judging module is connected with the second end of the capacitance detection group and is used for calculating the first induction capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, calculating the second induction capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation, determining an operation type corresponding to the operation instruction according to the first capacitance variation and the second capacitance variation, and sending the operation type to the output module;
and the output module is connected with the second end of the judgment module and used for generating a control instruction corresponding to the operation type according to the operation type and outputting the control instruction.
4. The system of claim 3, wherein the capacitance detection bank comprises:
the device comprises a first capacitance detection module and a second capacitance detection module;
the first end of the first capacitance detection module is connected with the capacitance sensing layer, and the second end of the first capacitance detection module is connected with the judgment module and used for detecting the first sensing capacitance value;
and the first end of the second capacitance detection module is connected with the pressure sensing layer, and the second end of the second capacitance detection module is connected with the judgment module and is used for detecting the second sensing capacitance value.
5. The system of claim 3, wherein the capacitance detection bank comprises:
the circuit comprises a first switch, a second switch, a time sequence control module and a third capacitance detection module;
the first end of the first switch is connected with the capacitance sensing layer, and the second end of the first switch is connected with the first end of the third capacitance detection module;
the first end of the second switch is connected with the pressure sensing layer, and the second end of the second switch is connected with the first end of the third capacitance detection module;
one end of the time sequence control module is connected with the third end of the first switch, and the other end of the time sequence control module is connected with the third end of the second switch, and is used for controlling the on-off of the first switch and the second switch;
and the second end of the third capacitance detection module is connected with the judgment module.
6. A capacitance detection method, comprising: the capacitance detection method is applicable to the capacitance detection system of any one of 1-5, and comprises the following steps:
when the capacitive sensor receives an operation instruction, acquiring a first induction capacitance value and a second induction capacitance value which are generated by the capacitive sensor and correspond to the operation instruction;
calculating the first induction capacitance value and a first fixed capacitance value obtained in advance to obtain a first capacitance variation, and calculating the second induction capacitance value and a second fixed capacitance value obtained in advance to obtain a second capacitance variation;
comparing the first capacitance variation and the second capacitance variation with a threshold value, determining an operation type corresponding to the operation instruction received by the capacitance sensor according to a comparison result, and outputting a control instruction corresponding to the operation type to execute an operation corresponding to the control instruction;
the capacitive sensor includes: the protective cover plate, the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer are sequentially arranged;
the protective cover plate protects the capacitance sensing layer, the insulating layer, the shielding layer, the buffer layer and the pressure sensing layer;
the capacitance sensing layer judges whether the capacitance sensing layer is of a self-capacitance structure or not, if the capacitance sensing layer is of the self-capacitance structure, a first fixed capacitor is formed between the capacitance sensing layer and the shielding layer, if the capacitance sensing layer is not of the self-capacitance structure, a first fixed capacitor is formed between a transmitting electrode and a receiving electrode in the capacitance sensing layer, and when the operation instruction is received, a first sensing capacitor corresponding to the operation instruction is generated according to the first fixed capacitor;
the insulating layer isolates the capacitive sensing layer from system ground;
the shielding layer electrically isolates the capacitance sensing layer from the pressure sensing layer;
the buffer layer receives an operation instruction and changes the distance between the shielding layer and the pressure induction layer;
the second induction capacitor is formed between the pressure induction layer and the shielding layer, and a second induction capacitance value is generated after the buffer layer deforms.
7. The method according to claim 6, wherein the determining, according to the first capacitance variation and the second capacitance variation, an operation type corresponding to the operation instruction received by the capacitive sensor comprises:
comparing the first capacitance variation with a preset first threshold to obtain a first comparison result;
comparing the second capacitance variation with a preset second threshold to obtain a second comparison result;
and determining the operation type corresponding to the operation instruction received by the capacitive sensor according to the first comparison result and the second comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910409216.6A CN110134281B (en) | 2019-05-16 | 2019-05-16 | Capacitance detection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910409216.6A CN110134281B (en) | 2019-05-16 | 2019-05-16 | Capacitance detection system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110134281A CN110134281A (en) | 2019-08-16 |
| CN110134281B true CN110134281B (en) | 2022-09-16 |
Family
ID=67574814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910409216.6A Active CN110134281B (en) | 2019-05-16 | 2019-05-16 | Capacitance detection system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110134281B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014648B (en) * | 2020-08-10 | 2023-04-28 | 南京天易合芯电子有限公司 | Capacitance detection method capable of detecting single-side capacitance |
| CN113054984B (en) * | 2021-05-20 | 2021-11-05 | 上海艾为微电子技术有限公司 | Pressure-sensitive detection circuit, chip, system and pressure-sensitive detection method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202153349U (en) * | 2011-06-15 | 2012-02-29 | 比亚迪股份有限公司 | Positioning device and touch control system used for capacitance touch screen |
| CN104281340A (en) * | 2013-07-12 | 2015-01-14 | 天津富纳源创科技有限公司 | Touch screen touch recognition method |
| CN104346000A (en) * | 2013-07-25 | 2015-02-11 | 天津富纳源创科技有限公司 | Touch identification method |
| CN104423740A (en) * | 2013-08-30 | 2015-03-18 | 天津富纳源创科技有限公司 | Capacitive touch device based sensing method |
| CN106020558A (en) * | 2016-06-22 | 2016-10-12 | 芯海科技（深圳）股份有限公司 | Composite touch control key and control method |
| CN106104441A (en) * | 2016-06-16 | 2016-11-09 | 深圳市汇顶科技股份有限公司 | Touch sensor, touch detecting apparatus and detection method, touch control device |
| CN106325623A (en) * | 2015-06-26 | 2017-01-11 | 小米科技有限责任公司 | Method and apparatus for monitoring touch on touch screen and terminal device |
| CN106569635A (en) * | 2016-10-31 | 2017-04-19 | 努比亚技术有限公司 | Terminal suspension combination operation device and method thereof |
| CN109313519A (en) * | 2016-08-03 | 2019-02-05 | 三星电子株式会社 | Electronic equipment including force snesor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10007380B2 (en) * | 2013-07-29 | 2018-06-26 | Hideep Inc. | Touch input device with edge support member |
| CN106293222A (en) * | 2016-08-08 | 2017-01-04 | 武汉华星光电技术有限公司 | Display screen and display |
| CN106383607B (en) * | 2016-08-31 | 2020-02-21 | 宸盛光电有限公司 | Touch display system with pressure sensing |
| KR101880434B1 (en) * | 2017-03-29 | 2018-07-23 | 주식회사 하이딥 | Touch input device and method for measuring a capacitance of the same |
-
2019
- 2019-05-16 CN CN201910409216.6A patent/CN110134281B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202153349U (en) * | 2011-06-15 | 2012-02-29 | 比亚迪股份有限公司 | Positioning device and touch control system used for capacitance touch screen |
| CN104281340A (en) * | 2013-07-12 | 2015-01-14 | 天津富纳源创科技有限公司 | Touch screen touch recognition method |
| CN104346000A (en) * | 2013-07-25 | 2015-02-11 | 天津富纳源创科技有限公司 | Touch identification method |
| CN104423740A (en) * | 2013-08-30 | 2015-03-18 | 天津富纳源创科技有限公司 | Capacitive touch device based sensing method |
| CN106325623A (en) * | 2015-06-26 | 2017-01-11 | 小米科技有限责任公司 | Method and apparatus for monitoring touch on touch screen and terminal device |
| CN106104441A (en) * | 2016-06-16 | 2016-11-09 | 深圳市汇顶科技股份有限公司 | Touch sensor, touch detecting apparatus and detection method, touch control device |
| CN106020558A (en) * | 2016-06-22 | 2016-10-12 | 芯海科技（深圳）股份有限公司 | Composite touch control key and control method |
| CN109313519A (en) * | 2016-08-03 | 2019-02-05 | 三星电子株式会社 | Electronic equipment including force snesor |
| CN106569635A (en) * | 2016-10-31 | 2017-04-19 | 努比亚技术有限公司 | Terminal suspension combination operation device and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110134281A (en) | 2019-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9619044B2 (en) | Capacitive and resistive-pressure touch-sensitive touchpad | |
| US20110096025A1 (en) | Projected Capacitive Touch Sensing | |
| US11209927B2 (en) | Apparatus for sensing user input | |
| CN104363012A (en) | Portable terminal and implementing method for pressing key of side of capacitor type touch screen by touching | |
| US9189119B2 (en) | Touch recognition method and touch panel thereof | |
| AU2017203910B2 (en) | Glove touch detection | |
| US9547030B2 (en) | Method of recognizing touch | |
| CN110134281B (en) | Capacitance detection system and method | |
| JP2010113445A (en) | Touch panel and method of detecting operation | |
| CN106909244B (en) | Touch key, touch operation detection method, touch IC and electronic equipment | |
| US9329740B2 (en) | Method of recognizing touch | |
| JP2008165575A (en) | Touch panel device | |
| CN106527831B (en) | Mutual hover protection for touch screens | |
| CN106569644A (en) | Touch sensing device and touch sensing method | |
| US11755166B2 (en) | Displacement sensing | |
| US10963090B2 (en) | Force and position determination based on capacitive sensing | |
| TW201430665A (en) | Touch sensing and feedback apparatuses and methods | |
| KR102011766B1 (en) | Apparatus for displaying information using touch sensing signal and method thereof | |
| CN104375724B (en) | Mobile terminal and touch operation method thereof | |
| EP3822748A1 (en) | Multi-mode operation method for capacitive touch panel | |
| US20100259422A1 (en) | keyboard with a plurality of sensitive key elements | |
| CN103576945B (en) | Contactor control device and its touch control detecting method | |
| US10558306B2 (en) | In-cell touch apparatus and a water mode detection method thereof | |
| WO2014002315A1 (en) | Operation device | |
| CN113885730A (en) | False touch prevention method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |