CN107390907B - Touch module, electronic equipment and pressure calibration method - Google Patents
Touch module, electronic equipment and pressure calibration method Download PDFInfo
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- CN107390907B CN107390907B CN201610324501.4A CN201610324501A CN107390907B CN 107390907 B CN107390907 B CN 107390907B CN 201610324501 A CN201610324501 A CN 201610324501A CN 107390907 B CN107390907 B CN 107390907B
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- 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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
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Abstract
The disclosure discloses a touch module, electronic equipment and a pressure calibration method, and belongs to the technical field of touch display. The touch module comprises: the touch control system comprises a touch screen, a first pressure touch control sensors, b second pressure touch control sensors and a touch control IC; each first pressure touch sensor is positioned in the area where the peripheral side part of the touch screen is positioned; each second pressure touch sensor is positioned in the area of the middle part of the touch screen; each first pressure touch sensor and each second pressure touch sensor are respectively electrically connected with the touch IC. The method solves the problem that the peripheral edge part of the touch screen deforms due to external factors such as pressure and falling of the electronic equipment, so that the detection precision of the pressure touch sensor on the pressure signal is influenced; therefore, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
Description
Technical Field
The disclosure relates to the technical field of touch display, and in particular to a touch module, an electronic device and a pressure calibration method.
Background
Currently, electronic devices such as mobile phones generally support a pressure touch function.
In the related art, a touch module of an electronic device includes: a touch screen, a pressure touch sensor, and a touch IC (Integrated Circuit). The touch screen is used for realizing common touch control functions, such as detecting click, sliding and other touch operations. The pressure touch sensor is generally arranged corresponding to the touch screen, that is, the projection of the pressure touch sensor in the plane of the touch screen is overlapped with the touch screen, so that the pressure touch function is realized in the touch screen.
At present, the touch screen frame of electronic equipment is mostly narrow, and even the design idea of a full-screen frameless mobile phone appears. This results in that the electronic device is easily deformed more or less by external factors such as pressure and falling, and such deformation is easily caused particularly at the peripheral edge portion of the touch panel. However, such deformation affects the detection accuracy of the pressure touch sensor on the pressure signal.
Disclosure of Invention
In order to overcome the problems in the related art, embodiments of the present disclosure provide a touch module, an electronic device, and a pressure calibration method. The technical scheme is as follows:
according to a first aspect of the embodiments of the present disclosure, a touch module is provided, which includes:
the touch screen, a first pressure touch sensors, b second pressure touch sensors and a touch IC, wherein a is a positive integer, and b is a positive integer;
the projection of each first pressure touch sensor in the plane of the touch screen is positioned in the area of the peripheral side part of the touch screen; the projection of each second pressure touch sensor in the plane of the touch screen is positioned in the area of the middle part of the touch screen;
each first pressure touch sensor and each second pressure touch sensor are respectively electrically connected with the touch IC.
Optionally, the number a of the first pressure touch sensors is 4, and the peripheral portion is surrounded by an upper portion, a right portion, a lower portion and a left portion which are sequentially connected;
the projections of the 4 first pressure touch sensors in the plane of the touch screen are respectively located in the areas of the upper portion, the right portion, the lower portion and the left portion.
Optionally, the number a of the first pressure touch sensors is 1, and a projection of the first pressure touch sensors in a plane where the touch screen is located is annular and located in an area where the peripheral portion is located.
Optionally, the number b of the second pressure touch sensors is 1.
Optionally, the number b of the second pressure touch sensors is greater than or equal to 2, and the b second pressure touch sensors are distributed in an array form.
Optionally, the touch IC is configured to:
acquiring an actual capacitance value and a reference capacitance value corresponding to a target pressure touch sensor, wherein the target pressure touch sensor is one of a first pressure touch sensors, and the reference capacitance value is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect a pressure signal;
when the actual capacitance value is not equal to the reference capacitance value, detecting whether an operation body acting on the target pressure touch sensor exists at present;
and if no operation body exists at present, correcting the reference capacitance value according to the actual capacitance value.
According to a second aspect of embodiments of the present disclosure, there is provided an electronic apparatus including: the touch control module and the processor;
the touch module includes: the touch screen, a first pressure touch sensors, b second pressure touch sensors and a touch IC, wherein a is a positive integer, and b is a positive integer;
the projection of each first pressure touch sensor in the plane of the touch screen is positioned in the area of the peripheral side part of the touch screen; the projection of each second pressure touch sensor in the plane of the touch screen is positioned in the area of the middle part of the touch screen;
each first pressure touch sensor and each second pressure touch sensor are respectively electrically connected with the touch IC;
the touch IC is also electrically connected with the processor through the bus.
According to a third aspect of the embodiments of the present disclosure, there is provided a pressure calibration method applied to the touch IC of the touch module as shown in the first aspect, the method including:
acquiring an actual capacitance value and a reference capacitance value corresponding to a target pressure touch sensor, wherein the target pressure touch sensor is one of a first pressure touch sensors, and the reference capacitance value is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect a pressure signal;
when the actual capacitance value is not equal to the reference capacitance value, detecting whether an operation body acting on the target pressure touch sensor exists at present;
and if no operation body exists at present, correcting the reference capacitance value according to the actual capacitance value.
Optionally, detecting whether there is an operation body currently acting on the target pressure touch sensor includes:
detecting whether a touch signal exists at a position corresponding to a target pressure touch sensor in a touch screen;
if the touch signal exists, determining that an operation body acting on the target pressure touch sensor exists;
and if the touch signal does not exist, determining that an operation body acting on the target pressure touch sensor does not exist.
Optionally, the correcting the reference capacitance value according to the actual capacitance value includes:
the actual capacitance value is used as the corrected reference capacitance value.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the first pressure touch sensor which is independent from the second pressure touch sensor is arranged on the peripheral side of the touch screen, and the first pressure touch sensor detects pressure signals of the peripheral side area of the touch screen, so that when the peripheral side edge part of the touch screen deforms, the reference capacitance value of the first pressure touch sensor is corrected, and the detection precision of the touch module on the pressure signals is ensured; the problem that the peripheral edge part of the touch screen deforms due to external factors such as pressure and falling of the electronic equipment, so that the detection precision of the pressure touch sensor on the pressure signal is influenced is solved; therefore, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of a touch module according to an exemplary embodiment;
fig. 2 is a schematic structural diagram of a touch module according to another exemplary embodiment;
fig. 3A is a schematic structural diagram of a touch module according to another exemplary embodiment;
FIG. 3B is a schematic diagram illustrating a structure of a touch module according to another exemplary embodiment;
FIG. 4 is a schematic diagram illustrating the structure of an electronic device in accordance with one illustrative embodiment;
FIG. 5 is a flow chart illustrating a method of pressure calibration according to an exemplary embodiment;
FIG. 6 is a flow chart illustrating a method of pressure calibration according to another exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Fig. 1 is a schematic structural diagram of a touch module 10 according to an exemplary embodiment. The touch module 10 may include: the touch screen 11, the a first pressure touch sensors 12, the b second pressure touch sensors 13 and the touch IC14, wherein a is a positive integer and b is a positive integer.
The projection of each first pressure touch sensor 12 in the plane of the touch screen 11 is located in the area of the peripheral side part of the touch screen; the projection of each second pressure touch sensor 13 in the plane of the touch screen 11 is located in the area of the middle portion of the touch screen. As shown in fig. 1, the outer side of the dotted line indicates the peripheral side portion of the touch panel 11, and the inner side of the dotted line indicates the middle portion of the touch panel 11.
Each first pressure touch sensor 12 and each second pressure touch sensor 13 are electrically connected to the touch IC14, respectively.
For example, as shown in fig. 1, the number of the first pressure touch sensors 12 and the second pressure touch sensors 13 is 1, that is, a-b-1.
In summary, in the touch module provided in this embodiment, the first pressure touch sensor that is independent from the second pressure touch sensor is disposed at the peripheral portion of the touch screen, and the first pressure touch sensor detects the pressure signal at the peripheral portion of the touch screen, so that when the peripheral edge portion of the touch screen deforms, the reference capacitance value of the first pressure touch sensor is corrected, thereby ensuring the detection accuracy of the touch module on the pressure signal; the problem that the peripheral edge part of the touch screen deforms due to external factors such as pressure and falling of the electronic equipment, so that the detection precision of the pressure touch sensor on the pressure signal is influenced is solved; therefore, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
Fig. 2 is a schematic structural diagram of a touch module 20 according to another exemplary embodiment. The touch module 20 may include: the touch screen 21, the a first pressure touch sensors 22, the b second pressure touch sensors 23 and the touch IC24, wherein a is a positive integer and b is a positive integer.
The touch panel 21 is a touch display panel, and has a pressure touch detection function for detecting a pressure touch operation in addition to a display function. Optionally, the touch screen 21 further has a normal touch detection function for detecting a normal touch operation (i.e., a touch operation). An effective display Area (AA) of the touch screen 21 is divided into a peripheral side portion and a middle portion by Area. Wherein the peripheral side portion is annular. The ring shape is generally a square ring, but the present embodiment is not limited to ring shapes of other shapes, such as circular ring, triangular ring, and other regular or irregular polygonal rings. The annular width of the peripheral side portion is set in advance according to design requirements, and since deformation is likely to occur at the peripheral edge portion of the touch panel 21, the annular width of the peripheral side portion does not have to be excessively wide. The outer ring edge of the peripheral side portion coincides with the outer edge of the effective display area of the touch panel 21, and the inner ring edge of the peripheral side portion coincides with the outer edge of the middle portion. As shown in fig. 2, the outer side of the dotted line indicates the peripheral side portion of the touch panel 21, and the inner side of the dotted line indicates the middle portion of the touch panel 21.
As shown in fig. 2, in this exemplary embodiment, the number a of the first pressure touch sensors 22 is 4, and the peripheral side portion is enclosed by an upper side portion, a right side portion, a lower side portion, and a left side portion which are connected in sequence. The projections of the 4 first pressure touch sensors 22 on the plane of the touch screen 21 are located in the areas of the upper portion, the right portion, the lower portion, and the left portion, respectively. The 4 first pressure touch sensors 22 are configured to detect pressure signals on areas where an upper portion, a right portion, a lower portion, and a left portion of the touch screen 21 are located, respectively, and report the detected pressure signals to the touch IC 24.
As shown in fig. 2, in this exemplary embodiment, the number b of the second pressure touch sensors 23 is 1, and a projection of the second pressure touch sensors 23 in the plane of the touch screen 21 is located in the area of the middle portion. The second pressure touch sensor 23 is configured to detect a pressure signal on an area where the middle portion of the touch screen 21 is located, and report the detected pressure signal to the touch IC 24.
Each first pressure touch sensor 22 and each second pressure touch sensor 23 are electrically connected to the touch IC24, respectively.
And the touch IC24 is used for acquiring an actual capacitance value and a reference capacitance value corresponding to the target pressure touch sensor. In this embodiment, the target pressure touch sensor is one of the a first pressure touch sensors, that is, one of the 4 first pressure touch sensors 22 shown in fig. 2. The reference capacitance value corresponding to the target pressure touch sensor is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect the pressure signal. Each of the first pressure touch sensors 22 has a corresponding reference capacitance value, and the reference capacitance value is adjustable. In addition, when the electronic device is shipped, the initial reference capacitance value corresponding to each first pressure touch sensor 22 is already stored in the electronic device. The actual capacitance value corresponding to the target pressure touch sensor is the capacitance value actually corresponding to the target pressure touch sensor when the target pressure touch sensor detects the pressure signal.
A touch IC24, configured to detect whether an operating body acting on the target pressure touch sensor exists at present when the actual capacitance value is not equal to the reference capacitance value; and if no operation body exists at present, correcting the reference capacitance value according to the actual capacitance value. When the actual capacitance value is not equal to the reference capacitance value, it indicates that the target pressure touch sensor detects a pressure signal, which may be generated by an operating body (e.g., a user's finger) applying pressure to the target pressure touch sensor; it is also possible that the peripheral edge portion of the touch screen 21 is deformed due to external factors such as pressure and falling of the electronic device, so that the target pressure touch sensor located at the peripheral edge portion of the touch screen 21 detects the pressure signal. In order to distinguish the two reasons for generating the pressure signal, the touch IC24 detects whether there is an operation body currently acting on the target pressure touch sensor; if the pressure signal exists, the pressure signal is generated by applying pressure to the target pressure touch sensor by the operation body; on the other hand, if the pressure signal does not exist, it indicates that the pressure signal is generated by deformation of the peripheral side edge portion of the touch screen 21. In one possible embodiment, the detecting whether there is an operating body currently acting on the target pressure touch sensor includes: detecting whether a touch signal exists at a position corresponding to a target pressure touch sensor in a touch screen; if the touch signal exists, determining that an operation body acting on the target pressure touch sensor exists; and if the touch signal does not exist, determining that an operation body acting on the target pressure touch sensor does not exist. The touch screen 21 further includes a common touch sensor electrically connected to the touch IC24, and the touch IC24 detects whether a touch signal exists at a position of the touch screen 21 corresponding to the target pressure touch sensor through the common touch sensor.
When detecting that there is no operating body acting on the target pressure touch sensor, it indicates that the pressure signal is generated due to deformation of the peripheral edge portion of the touch screen 21, and the touch IC24 corrects the reference capacitance value according to the actual capacitance value, including: the actual capacitance value is used as the corrected reference capacitance value. That is, the reference capacitance value corresponding to the target pressure touch sensor is replaced by the obtained actual capacitance value, so as to obtain the corrected reference capacitance value. By the mode, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
Alternatively, in consideration of the fact that an external force such as slight impact, friction, and the like of an article such as a key, a pendant, and the like on an electronic device may also cause a target pressure touch sensor to detect a pressure signal, but such an article is not an operating body, in order to avoid the touch IC24 from mistakenly recognizing the pressure signal as being generated due to deformation, the touch IC24 detects whether a duration in which an actual capacitance value is unequal to a reference capacitance value is longer than a predetermined duration after detecting that the actual capacitance value is unequal to the reference capacitance value and that an operating body acting on the target pressure touch sensor does not exist currently, and when the duration is longer than the predetermined duration, the touch IC24 corrects the reference capacitance value according to the actual capacitance value. Because the pressure signal generated by deformation is constantly present after the deformation is generated, and the pressure signal generated by external force such as slight impact, friction and the like of an article is transient or intermittent, the pressure signal generated by external force such as slight impact, friction and the like of the article can be effectively distinguished by the mode, and the reference capacitance value is prevented from being corrected by mistake.
In summary, in the touch module provided in this embodiment, the first pressure touch sensor that is independent from the second pressure touch sensor is disposed at the peripheral portion of the touch screen, and the first pressure touch sensor detects the pressure signal at the peripheral portion of the touch screen, so that when the peripheral edge portion of the touch screen deforms, the reference capacitance value of the first pressure touch sensor is corrected, thereby ensuring the detection accuracy of the touch module on the pressure signal; the problem that the peripheral edge part of the touch screen deforms due to external factors such as pressure and falling of the electronic equipment, so that the detection precision of the pressure touch sensor on the pressure signal is influenced is solved; therefore, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
It should be noted that, in the embodiment of the present disclosure, the number of the first pressure touch sensors is not particularly limited, and the number of the first pressure touch sensors may be one or multiple. The smaller the number of the first pressure touch sensors is, the lower the requirement on the number of channels supported by the touch IC is; on the contrary, the more the number of the first pressure touch sensors is, the deformation of different positions of the peripheral side edge part of the touch screen can be detected respectively, and the correction flexibility is higher and the pertinence is stronger.
It should be noted that, in the embodiment of the present disclosure, the number of the second pressure touch sensors is not limited specifically, and the number of the second pressure touch sensors may be one or multiple. When the number b of the second pressure touch sensors is greater than or equal to 2, the b second pressure touch sensors are distributed in an array form. The smaller the number of the second pressure touch sensors is, the lower the requirement on the number of channels supported by the touch IC is; on the contrary, the more the number of the second pressure touch sensors is, the more accurate detection can be carried out on the pressure values of the pressure signals acting on different areas of the touch screen, and the action positions of the pressure signals can be distinguished.
For example, as shown in fig. 3A, the number of the first pressure touch sensors 22 is 1, and a projection of the first pressure touch sensors in a plane where the touch screen 21 is located is annular; the number of the second pressure touch sensors 23 is 4, and the second pressure touch sensors are distributed in an array in an area where a middle portion of the touch screen 21 is located. As shown in fig. 3B, the number of the first pressure touch sensors 22 is 4, and the first pressure touch sensors are respectively located at an upper portion, a right portion, a lower portion, and a left portion, which are sequentially connected on the peripheral side of the touch screen 21; the number of the second pressure touch sensors 23 is 4, and the second pressure touch sensors are distributed in an array in an area where a middle portion of the touch screen 21 is located.
Fig. 4 is a schematic diagram illustrating a structure of an electronic device 400 according to an exemplary embodiment, for example, the electronic device 400 may be a mobile phone, a tablet computer, an e-book reader, a multimedia player, and the like. As shown in fig. 4, the electronic device 400 includes: a touch module 410 and a processor 420.
The touch module 410 includes: the touch screen, a first pressure touch sensor, b second pressure touch sensor and touch integrated circuit IC, a is positive integer, and b is positive integer.
The projection of each first pressure touch sensor in the plane of the touch screen is positioned in the area of the peripheral side part of the touch screen; the projection of each second pressure touch sensor in the plane of the touch screen is positioned in the area of the middle part of the touch screen; each first pressure touch sensor and each second pressure touch sensor are respectively electrically connected with the touch IC.
The touch IC is also electrically connected to the processor 420 through a bus.
The processor 420 receives the pressure signal reported by the touch IC through the bus, and controls the electronic device to execute a corresponding operation according to the pressure signal.
The structure of the touch module 410 can refer to the description and illustration in the embodiment shown in fig. 1 or fig. 2, and the description of this embodiment is not repeated.
In summary, in the electronic device provided in this embodiment, the first pressure touch sensor that is independent from the second pressure touch sensor is disposed at the peripheral portion of the touch screen, and the first pressure touch sensor detects the pressure signal at the peripheral portion of the touch screen, so that when the peripheral edge portion of the touch screen deforms, the reference capacitance value of the first pressure touch sensor is corrected, thereby ensuring the detection accuracy of the touch module on the pressure signal; the problem that the peripheral edge part of the touch screen deforms due to external factors such as pressure and falling of the electronic equipment, so that the detection precision of the pressure touch sensor on the pressure signal is influenced is solved; therefore, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
FIG. 5 is a flow chart illustrating a method of pressure calibration according to an exemplary embodiment. The pressure calibration method can be applied to the touch IC of the touch module provided by the embodiment. The pressure calibration method may include the following steps.
In step 501, an actual capacitance value and a reference capacitance value corresponding to the target pressure touch sensor are obtained.
The target pressure touch sensor is one of the a first pressure touch sensors, and the reference capacitance value is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect the pressure signal.
In step 502, when the actual capacitance value is not equal to the reference capacitance value, it is detected whether an operating body acting on the target pressure touch sensor exists currently.
In step 503, if no operation body is currently present, the reference capacitance value is corrected based on the actual capacitance value.
In summary, in the pressure calibration method provided in this embodiment, the first pressure touch sensor that is independent from the second pressure touch sensor is disposed at the peripheral portion of the touch screen, and the first pressure touch sensor detects the pressure signal at the peripheral portion of the touch screen, so that when the peripheral edge portion of the touch screen deforms, the reference capacitance value of the first pressure touch sensor is corrected, thereby ensuring the detection accuracy of the touch module on the pressure signal; the problem that the peripheral edge part of the touch screen deforms due to external factors such as pressure and falling of the electronic equipment, so that the detection precision of the pressure touch sensor on the pressure signal is influenced is solved; therefore, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
FIG. 6 is a flow chart illustrating a method of pressure calibration according to another exemplary embodiment. The pressure calibration method can be applied to the touch IC of the touch module provided by the embodiment. The pressure calibration method may include the following steps.
In step 601, an actual capacitance value and a reference capacitance value corresponding to the target pressure touch sensor are obtained.
The target pressure touch sensor is one of the a first pressure touch sensors, and the reference capacitance value is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect the pressure signal.
The reference capacitance value corresponding to the target pressure touch sensor is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect the pressure signal. Each first pressure touch sensor has a corresponding reference capacitance value, and the reference capacitance value is adjustable. In addition, when the electronic device is shipped from a factory, the initial reference capacitance value corresponding to each first pressure touch sensor is already stored in the electronic device. The actual capacitance value corresponding to the target pressure touch sensor is the capacitance value actually corresponding to the target pressure touch sensor when the target pressure touch sensor detects the pressure signal.
In step 602, when the actual capacitance value is not equal to the reference capacitance value, whether a touch signal exists at a position corresponding to the target pressure touch sensor in the touch screen is detected. If yes, go to step 603; if not, the following steps 604 and 605 are performed.
When the actual capacitance value is not equal to the reference capacitance value, it indicates that the target pressure touch sensor detects a pressure signal, which may be generated by an operating body (e.g., a user's finger) applying pressure to the target pressure touch sensor; the peripheral edge portion of the touch screen may be deformed due to external factors such as pressure and dropping of the electronic device, so that the target pressure touch sensor located at the peripheral edge portion of the touch screen detects the pressure signal. In order to distinguish the two reasons for generating the pressure signal, the touch IC detects whether an operation body acting on the target pressure touch sensor exists at present; if the pressure signal exists, the pressure signal is generated by applying pressure to the target pressure touch sensor by the operation body; if the pressure signal does not exist, the pressure signal is generated due to deformation of the peripheral side edge part of the touch screen.
In the embodiment, the touch IC detects whether a touch signal exists at a position corresponding to the target pressure touch sensor in the touch screen; if the touch signal exists, determining that an operation body acting on the target pressure touch sensor exists; and if the touch signal does not exist, determining that an operation body acting on the target pressure touch sensor does not exist. The touch screen further comprises a common touch sensor, the common touch sensor is electrically connected with the touch IC, and the touch IC detects whether a touch signal exists at a position corresponding to the target pressure touch sensor in the touch screen through the common touch sensor.
In step 603, it is determined that there is an operating body acting on the target pressure touch sensor.
In step 604, it is determined that there is no operating body acting on the target pressure touch sensor.
In step 605, the reference capacitance value is corrected based on the actual capacitance value.
When detecting that there is no operation body acting on the target pressure touch sensor at present, it indicates that the pressure signal is generated due to deformation of the peripheral edge portion of the touch screen, and the touch IC corrects the reference capacitance value according to the actual capacitance value, including: the actual capacitance value is used as the corrected reference capacitance value. That is, the reference capacitance value corresponding to the target pressure touch sensor is replaced by the obtained actual capacitance value, so as to obtain the corrected reference capacitance value. By the mode, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
Alternatively, in consideration of the fact that the target pressure touch sensor may detect the pressure signal due to an external force such as a slight impact, friction, or the like, which is generated by an object such as a key, a pendant, or the like, on the electronic device, but such an object is not an operation body, in order to prevent the touch IC from mistakenly recognizing the pressure signal as being generated due to deformation, the touch IC detects whether a duration in which the actual capacitance value is unequal to the reference capacitance value is greater than a predetermined duration after detecting that the actual capacitance value is unequal to the reference capacitance value and no operation body acting on the target pressure touch sensor currently exists, and corrects the reference capacitance value according to the actual capacitance value when the duration is greater than the predetermined duration. Because the pressure signal generated by deformation is constantly present after the deformation is generated, and the pressure signal generated by external force such as slight impact, friction and the like of an article is transient or intermittent, the pressure signal generated by external force such as slight impact, friction and the like of the article can be effectively distinguished by the mode, and the reference capacitance value is prevented from being corrected by mistake.
In summary, in the pressure calibration method provided in this embodiment, the first pressure touch sensor that is independent from the second pressure touch sensor is disposed at the peripheral portion of the touch screen, and the first pressure touch sensor detects the pressure signal at the peripheral portion of the touch screen, so that when the peripheral edge portion of the touch screen deforms, the reference capacitance value of the first pressure touch sensor is corrected, thereby ensuring the detection accuracy of the touch module on the pressure signal; the problem that the peripheral edge part of the touch screen deforms due to external factors such as pressure and falling of the electronic equipment, so that the detection precision of the pressure touch sensor on the pressure signal is influenced is solved; therefore, the electronic equipment cannot respond to the pressure signal generated by deformation, and the error response is avoided.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. A touch module, comprising: the touch screen, a first pressure touch sensors, b second pressure touch sensors and a touch Integrated Circuit (IC), wherein a is a positive integer, and b is a positive integer;
the projection of each first pressure touch sensor in the plane of the touch screen is positioned in the area of the peripheral side part of the touch screen; the projection of each second pressure touch sensor in the plane of the touch screen is located in the area of the middle part of the touch screen, the number b of the second pressure touch sensors is greater than or equal to 2, and the b second pressure touch sensors are distributed in an array form;
each first pressure touch sensor and each second pressure touch sensor are respectively electrically connected with the touch IC.
2. The touch module of claim 1, wherein the number a of the first pressure touch sensors is 4, and the peripheral portion is enclosed by an upper portion, a right portion, a lower portion and a left portion which are sequentially connected;
the projections of the 4 first pressure touch sensors in the plane of the touch screen are respectively located in the areas where the upper portion, the right portion, the lower portion and the left portion are located.
3. The touch module of claim 1, wherein the number a of the first pressure touch sensors is 1, and a projection of the first pressure touch sensors on a plane of the touch screen is annular and located in an area where the peripheral portion is located.
4. The touch module of claim 1, wherein the touch IC is configured to:
acquiring an actual capacitance value and a reference capacitance value corresponding to a target pressure touch sensor, wherein the target pressure touch sensor is one of the a first pressure touch sensors, and the reference capacitance value is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect a pressure signal;
when the actual capacitance value is not equal to the reference capacitance value, detecting whether an operation body acting on the target pressure touch sensor exists at present;
and if the operation body does not exist at present, correcting the reference capacitance value according to the actual capacitance value.
5. An electronic device, characterized in that the electronic device comprises: the touch control module and the processor;
the touch module comprises: the touch screen, a first pressure touch sensors, b second pressure touch sensors and a touch Integrated Circuit (IC), wherein a is a positive integer, and b is a positive integer;
the projection of each first pressure touch sensor in the plane of the touch screen is positioned in the area of the peripheral side part of the touch screen; the projection of each second pressure touch sensor in the plane of the touch screen is located in the area of the middle part of the touch screen, the number b of the second pressure touch sensors is greater than or equal to 2, and the b second pressure touch sensors are distributed in an array form;
each first pressure touch sensor and each second pressure touch sensor are respectively electrically connected with the touch IC;
the touch IC is also electrically connected with the processor through a bus.
6. A pressure calibration method applied to the touch integrated circuit IC of the touch module as claimed in claim 1, the method comprising:
acquiring an actual capacitance value and a reference capacitance value corresponding to a target pressure touch sensor, wherein the target pressure touch sensor is one of the a first pressure touch sensors, and the reference capacitance value is a capacitance value corresponding to the target pressure touch sensor when the target pressure touch sensor does not detect a pressure signal;
when the actual capacitance value is not equal to the reference capacitance value, detecting whether an operation body acting on the target pressure touch sensor exists at present;
and if the operation body does not exist at present, correcting the reference capacitance value according to the actual capacitance value.
7. The method according to claim 6, wherein the detecting whether there is an operation body currently acting on the target pressure touch sensor comprises:
detecting whether a touch signal exists at a position, corresponding to the target pressure touch sensor, in the touch screen;
if the touch signal exists, determining that an operation body acting on the target pressure touch sensor exists;
and if the touch signal does not exist, determining that an operation body acting on the target pressure touch sensor does not exist.
8. The method of claim 6, wherein the modifying the reference capacitance value according to the actual capacitance value comprises:
and taking the actual capacitance value as a corrected reference capacitance value.
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| CN108762582A (en) * | 2018-07-27 | 2018-11-06 | 北京小米移动软件有限公司 | Touch control component and electronic equipment |
| CN109714037B (en) * | 2018-12-12 | 2023-08-18 | 芯海科技（深圳）股份有限公司 | Pressure key sensor, press detection method, and computer-readable storage medium |
| CN110244251B (en) * | 2019-07-17 | 2021-09-10 | 深圳市汇顶科技股份有限公司 | Method and device for acquiring calibration coefficient and calibration chip |
| CN112540703B (en) | 2019-09-19 | 2022-08-26 | 华为技术有限公司 | Touch screen control method and electronic equipment |
| CN110703947B (en) * | 2019-09-30 | 2022-09-02 | Oppo（重庆）智能科技有限公司 | Touch screen correction method and device, electronic equipment and storage medium |
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| CN103677452B (en) * | 2012-08-30 | 2017-05-24 | 华为终端有限公司 | Capacitive touch screen calibration method and capacitive touch device |
| CN102945109B (en) * | 2012-11-29 | 2015-10-28 | 锐迪科科技有限公司 | Mutual capacitance screen detects the method for touch area |
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