WO2013107310A1

WO2013107310A1 - Method and terminal for calibrating capacitive touch screen

Info

Publication number: WO2013107310A1
Application number: PCT/CN2013/070168
Authority: WO
Inventors: 崔宇
Original assignee: 华为终端有限公司
Priority date: 2012-01-18
Filing date: 2013-01-07
Publication date: 2013-07-25
Also published as: CN102541382A

Abstract

Disclosed are a method and a terminal for calibrating a capacitive touch screen. The method comprises: receiving a signal for waking up the capacitive touch screen; calibrating the capacitive touch screen; determining whether screen freezing happens to the capacitive touch screen; and re-calibrating the capacitive touch screen when determining that screen freezing happens to the capacitive touch screen. The terminal comprises the capacitive touch screen, and the terminal further comprises: a receiving module, a calibrating module, a screen freezing determining module and a re-calibrating module. According to the method and the terminal for calibrating the capacitive touch screen of the embodiments of the present invention, a base value can be determined accurately by the terminal by means of determining whether screen freezing happens to the capacitive touch screen during waking-up and by re-calibrating the capacitive touch screen when determining that screen freezing happens to the capacitive touch screen, so that the problem of screen freezing happening when the terminal is woken up can be solved, thereby improving the user experience.

Description

Method and terminal for calibrating a capacitive touch screen This application is filed on January 18, 2012, the Chinese Patent Office, the application number is CN 201210015800. 1. The priority of the Chinese patent application entitled "Method and Terminal for Calibrating a Capacitive Touch Screen" The entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and terminal for calibrating a capacitive touch screen in the field of communications. BACKGROUND OF THE INVENTION The main structure of a capacitive touch screen is to apply a transparent special metal conductive material to the surface of the glass. When a finger or other conductor touches the metal conductive layer, the capacitance of the touched touch point on the capacitive touch screen changes, so that the frequency of the oscillator connected thereto changes, and therefore, it can be determined by measuring the frequency change. Touch location information. Due to the good sensitivity, light transmittance and sharpness of capacitive touch screens, most smart phones now use capacitive touch screens and support multi-touch.

The capacitive touch screen has a reference signal value (Basel ine). When a finger or other electrical conductor touches the touch screen, the obtained signal value changes with respect to the reference signal value, and the chip determines the finger or other conductor according to the change of the signal value. Operation information such as location. Since the signal value of the capacitive touch screen is susceptible to external conditions such as temperature and humidity, the reference signal value needs to be constantly calibrated to accommodate changes in the outside world. When the phone is hibernated and awake again, there may be many changes in the outside world, so the touch screen will self-calibrate when waking up. If there is a conductor when waking up, for example, if the human body touches the touch screen, then the self-calibration will consider the state of the conductor to be normal, and the state without the conductor will be considered as always having the touch point pressed. This causes the touch screen to freeze when it is woken up, that is, the touch screen fails.

In the prior art, the operating system used by most smart phones currently requires a sliding touch screen to be unlocked when the mobile phone wakes up, and the mobile phone may be required to slide the touch screen to connect or hang up the phone, and only supports single touch at this time, therefore, if If another touch point is pressed, the freeze screen will occur and the phone cannot be unlocked or answered. In the prior art, the solution to this is: After sliding and unlocking, the upper layer software notifies whether the current state of the underlying driver has been normally unlocked. The problem of this scheme is that the coupling between the upper layer software and the underlying driver is increased, which may result in portability. Poor sex and unstable system.

Therefore, when the terminal with the capacitive touch screen is awakened, the touch screen is likely to freeze, which results in the user being unable to operate and the user experience is poor. Summary of the invention

The embodiment of the invention provides a method and a terminal for calibrating a capacitive touch screen, which can effectively solve the problem that a frozen screen occurs when the terminal wakes up, and the user cannot operate.

In one aspect, an embodiment of the present invention provides a method for calibrating a capacitive touch screen, the method comprising: receiving a signal waking up the capacitive touch screen; performing calibration on the capacitive touch screen; determining whether the capacitive touch screen freezes; When it is determined that the capacitive touch screen freezes, the capacitive touch screen is recalibrated.

In another aspect, the embodiment of the present invention provides a terminal, the terminal includes a capacitive touch screen, and the terminal further includes: a receiving module, configured to receive a signal for waking up the capacitive touch screen; and a calibration module, configured to: The touch screen is calibrated; the freeze screen determining module is configured to determine whether the capacitive touch screen freezes; and the recalibration module is configured to re-perform the capacitive touch screen when the freeze screen determining module determines that the capacitive touch screen freezes calibration.

Based on the foregoing technical solution, the method and terminal for calibrating a capacitive touch screen according to an embodiment of the present invention, by determining whether a capacitive touch screen freezes, and re-calibrating when determining that a capacitive touch screen freezes, enables the terminal to accurately determine the reference. The value can effectively solve the problem that the terminal freezes when waking up, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are only some implementations of the present invention. For example, other drawings may be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic flow chart of a method of calibrating a capacitive touch screen in accordance with an embodiment of the present invention.

2 is another schematic flowchart of a method of calibrating a capacitive touch screen according to an embodiment of the invention.

3 is a schematic block diagram of a terminal in accordance with an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. . Based on the embodiments of the present invention, all of those obtained by those of ordinary skill in the art without creative efforts Other embodiments are intended to fall within the scope of the invention.

It should be understood that, in the embodiment of the present invention, the terminal includes, but is not limited to, various devices including a capacitive touch screen, such as various mobile phones, tablet computers, PDAs, notebook computers, desktop computers, and showcases.

It should also be understood that the technical solutions of the embodiments of the present invention can also be applied to other various terminals having a capacitive touch screen, including a mobile phone with a capacitive touch screen, a tablet computer with a capacitive touch screen, and various audio and video with a capacitive touch screen. Player, etc. For convenience of description, the embodiment of the present invention will be exemplified by a mobile phone having a capacitive touch screen, but the present invention is not limited thereto.

FIG. 1 shows a schematic flow diagram of a method 100 of calibrating a capacitive touch screen in accordance with an embodiment of the present invention. As shown in FIG. 1, the method 100 includes:

S110. Receive a signal for waking up the capacitive touch screen.

S120, calibrating the capacitive touch screen.

S130. Determine whether the capacitive touch screen freezes.

S140. After determining that the capacitive touch screen freezes, recalibrate the capacitive touch screen. In step S110, it should be noted that when the terminal is dormant, any other operation performed by the user to activate the terminal may be considered as an operation of waking up the capacitive touch screen of the terminal, that is, when the terminal is activated, the terminal will receive Wake up the signal from the capacitive touch screen. The activation refers to waking up the terminal in a sleep state, including but not limited to, awakening by a user triggering a button, a wake-up of an incoming call, a wake-up of a short message, and the like, which is not limited in this embodiment of the present invention. When the capacitive touch screen receives the wake-up signal, the terminal having the capacitive touch screen can perform a calibration operation on the capacitive touch screen, and can determine whether the capacitive touch screen freezes according to the touch state information of the capacitive touch screen; When it is determined that the capacitive touch screen freezes, the capacitive touch screen is recalibrated.

In S120, after receiving the signal of the wake-up capacitive touch screen, the terminal having the capacitive touch screen performs a calibration operation on the capacitive touch screen. It should be understood that the terminal can perform calibration operation on the capacitive touch screen according to the current usual calibration method, and after performing calibration operation on the capacitive touch screen, calibration data which is usually used as a reference value can be obtained.

Therefore, the method for calibrating a capacitive touch screen according to an embodiment of the present invention can ensure that the terminal can accurately determine the reference value by determining whether a capacitive touch screen has a freeze screen and re-calibrating when determining that the capacitive touch screen freezes, thereby avoiding The problem of freezing the screen occurs when the terminal wakes up, thereby improving the user experience.

In addition, compared with the prior art, the method for calibrating the capacitive touch screen of the embodiment of the present invention can be operated independently and effectively because the coupling with the upper application software can be avoided, and the portability is good, and the method is optional. Intentional unlocking graphics can be adapted, not limited by the unlocking graphics, and the application range is wider. Moreover, the method of calibrating a capacitive touch screen of an embodiment of the present invention does not add additional power consumption.

In S130, the terminal having the capacitive touch screen can determine whether the capacitive touch screen freezes according to the touch state information of the capacitive touch screen. For example, the terminal may determine whether the capacitive touch screen is frozen or not according to information such as the number of touched touch points of the capacitive touch screen, the time when the touched point is touched, and various touch operations performed by the user on the capacitive touch screen.

For example, in the embodiment of the present invention, if at least one touch point of the capacitive touch screen receives the touch signal all the time, it may be determined that the capacitive touch screen is frozen; the “always” refers to at least the capacitive touch screen. Receiving a touch signal continuously in two periods of receiving the touch signal; or at least two touch points of the capacitive touch product simultaneously receiving the touch signal, and determining that the capacitive touch screen freezes.

Therefore, in the embodiment of the present invention, optionally, determining whether the capacitive touch screen is frozen or not includes: detecting whether the capacitive touch screen has at least one touch point to receive a touch signal, and the “always” means at least The capacitive touch screen continuously receives the touch signal in two periods of receiving the touch signal; and when the capacitive touch screen has the at least one touch point, determining that the capacitive touch screen is frozen.

Optionally, determining whether the capacitive touch screen is frozen or not includes: detecting whether the capacitive touch screen has at least two touch points and receiving a touch signal simultaneously; and determining, when the capacitive touch screen has the at least two touch points, determining The capacitive touch screen freezes.

For example, when the terminal is awakened, if the human body touches the capacitive touch screen, then the calibrated capacitive touch screen is not in a normal state, so that at least one touch point of the capacitive touch screen is always pressed for a predetermined time. At this time, it can be considered that the capacitive touch screen freezes, that is, it is in an abnormal state or a failure state, and thus it is determined that there is an error in the calibration data at this time, and a freeze screen phenomenon occurs.

For example, when the terminal is woken up, the terminal usually only supports single touch, so that when at least two touch points of the capacitive touch screen are simultaneously pressed, the capacitive touch screen may be considered to freeze, that is, confirm the current time. The calibrated capacitive touch screen is in an abnormal state, and it is determined that there is an error in the calibration data at this time, and a freeze screen phenomenon occurs.

Optionally, in the embodiment of the present invention, when the capacitive touch screen has an effective sliding operation, it is determined that the capacitive touch screen does not freeze; or any point of the capacitive touch screen does not receive the touch for a predetermined time. The signal, and no more than two touch points simultaneously receive the touch signal, determining that the capacitive touch screen does not freeze.

Therefore, in the embodiment of the present invention, determining whether the capacitive touch screen is frozen or not may include: detecting Whether there is an effective sliding operation on the capacitive touch screen; when there is an effective sliding operation on the capacitive touch screen, it is determined that the capacitive touch screen does not freeze.

Optionally, determining whether the capacitive touch screen is frozen or not may include: not receiving the touch signal at any point of the capacitive touch screen for a predetermined time, and when no more than two touch points simultaneously receiving the touch signal , it is determined that the capacitive touch screen does not freeze.

For example, when the terminal is dormant, it is usually required to slide the touch screen to unlock the touch screen. Therefore, if the capacitive touch screen of the terminal has an effective sliding operation (for example, 100 pixels), then the capacitive touch screen can be considered to be in a normal state, so this can be The calibration data obtained by performing the calibration operation is used as a reference value. On the other hand, when the terminal is woken up, the terminal usually only supports single touch, so that any point of the capacitive touch screen does not always receive the touch signal for a predetermined time, and no more than two touch points are simultaneously received. When the signal is touched, then the capacitive touch screen can be considered to be in a normal state to determine that the capacitive touch screen does not freeze.

In S140, the terminal having the capacitive touch screen re-calibrates the capacitive touch screen when determining that the capacitive touch screen freezes, and determines whether the capacitive touch screen freezes.

For example, when the terminal determines that the capacitive touch screen freezes, the calibration operation of the capacitive touch screen may be re-executed, and it is determined again whether the capacitive touch screen freezes until the freezing screen of the capacitive touch screen is determined to be ended. Or set a calibration time. When no freeze screen is detected during the calibration time after the calibration operation, it is considered that the capacitive touch screen does not freeze and exit the calibration process. Therefore, the problem that the terminal freezes when waking up can be effectively avoided, thereby significantly improving the user experience.

It should be understood that when the terminal having the capacitive touch screen determines that the capacitive touch screen does not freeze, the terminal can determine the calibration data obtained by the calibration operation as the reference value. Therefore, the terminal having the capacitive touch screen can determine the calibration data for performing the calibration operation on the capacitive touch screen as the reference value when the capacitive touch screen is in the normal state, thereby avoiding that when the capacitive touch screen is in an abnormal state, The freeze screen phenomenon caused by the wrong calibration data as the reference value.

The method for calibrating a capacitive touch screen according to an embodiment of the present invention will be described in detail below with reference to FIG. 2 as an example of a mobile phone having a capacitive touch screen. It should be noted that the embodiment of the present invention is not limited to a mobile phone.

As shown in FIG. 2, a method 200 of calibrating a capacitive touch screen according to an embodiment of the invention includes:

S210, when the mobile phone with the capacitive touch screen has an incoming call, the mobile phone is turned on, or the mobile phone is unlocked, the hand Receiving a signal to wake up the capacitive touch screen;

S220, the mobile phone can perform calibration operation on the capacitive touch screen, and obtain corresponding calibration data;

5230, the mobile phone can determine whether the capacitive touch screen freezes and whether the calibration process times out;

5231, when the capacitive touch screen has an effective sliding operation, the mobile phone can determine that the capacitive touch screen does not freeze the screen; or the touch signal is not received at any point of the capacitive touch screen for a predetermined time. "Continuous" means that the touch signal is continuously received in at least two periods in which the capacitive touch screen receives the touch signal; and when no more than two touch points simultaneously receive the touch signal, the mobile phone can also determine the capacitive touch screen. No freeze screen occurs; and according to the set timer, it is determined that the calibration process has not timed out, and the process ends;

S232, at least one touch point of the capacitive touch screen receives the touch signal for a predetermined time, the mobile phone may determine the capacitive touch screen freeze screen; or receive the touch signal at the at least two touch points of the capacitive touch screen. The mobile phone can also determine the capacitive touch screen freeze screen for recalibration.

S233, the mobile phone can determine, according to the set timer, that the calibration process does not time out; when the mobile phone determines that the calibration process times out, the process ends.

S240, the calibration process ends.

It should be understood that when it is determined that the capacitive touch screen does not freeze (S231), the process ends; when it is determined that the capacitive touch screen freezes (S232), the process proceeds to S220, recalibration, that is, it is determined that the capacitive touch screen is frozen. When the screen does not time out, the capacitive touch screen is recalibrated, and it is determined again whether the capacitive touch screen freezes; when it is determined that the calibration flow has timed out (S233), the process ends.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention. The implementation process constitutes any limitation.

A method of calibrating a capacitive touch screen according to an embodiment of the present invention is described in detail above with reference to Figs. 1 through 2, and a terminal having a capacitive touch screen according to an embodiment of the present invention will be described hereinafter with reference to Fig. 3.

FIG. 3 shows a schematic block diagram of a terminal 300 in accordance with an embodiment of the present invention. As shown in FIG. 3, the terminal 300 includes:

The receiving module 310 is configured to receive a signal for waking up the capacitive touch screen. Have an incoming call at the terminal, the terminal When the power is turned on or the terminal is unlocked, a signal to wake up the capacitive touch screen is received.

a calibration module 320, configured to calibrate the capacitive touch screen;

a freeze screen determining module 330, configured to determine whether a frozen screen occurs on the capacitive touch screen;

The recalibration module 340 is configured to recalibrate the capacitive touch screen when the freeze screen determination module 330 determines that the capacitive touch screen is frozen.

Therefore, the terminal of the calibrated capacitive touch screen of the embodiment of the present invention determines whether the capacitive touch screen freezes when it is awakened, and re-calibrates when it is determined that the capacitive touch screen freezes, so that the terminal can accurately determine the reference value. Therefore, it is possible to avoid the problem that the terminal freezes when waking up, thereby improving the user experience.

The freeze screen determination module 330 includes:

a first detecting unit, configured to detect whether the capacitive touch screen has at least one touch point and receive a touch signal for a certain period of time; the “always” means continuous in at least two cycles of receiving the touch signal by the capacitive touch screen Receiving a touch signal;

The first determining unit is configured to determine that the capacitive touch screen freezes when the first detecting unit detects that the capacitive touch screen has the at least one touch point.

Optionally, the freeze screen determining module 330 may further include:

a second detecting unit, configured to detect whether the capacitive touch screen has at least two touch points and simultaneously receive a touch signal;

And a second determining unit, configured to: when the second detecting unit detects that the capacitive touch screen has the at least two touch points, determine that the capacitive touch screen is frozen.

Optionally, the freeze screen determination module 330 includes:

a third detecting unit, configured to detect whether the capacitive touch screen has an effective sliding operation;

And a third determining unit, configured to determine, when the third detecting unit detects that the capacitive touch screen has an effective sliding operation, determining that the capacitive touch screen does not freeze.

In the embodiment of the present invention, the freeze screen determining module 330 is further configured to: when any point of the capacitive touch screen is not pressed all the time, and no more than two touch points are simultaneously pressed , Make sure that the capacitive touch screen does not have a frozen screen.

It should be understood that the terminal 300 may include various terminals having a capacitive touch screen, such as a mobile phone having a capacitive touch screen, a tablet having a capacitive touch screen, various audio and video players having a capacitive touch screen, and the like.

It should also be understood that the terminal 300 for calibrating the capacitive touch screen according to an embodiment of the present invention may correspond to the terminal of the calibrated capacitive touch screen in the method of the embodiment of the present invention, and the above and other operations of the respective modules in the terminal 300 For the sake of brevity, the operation and/or function are respectively omitted in order to implement the corresponding processes of the respective methods in FIG. 1 to FIG. 2 .

Therefore, the terminal of the calibrated capacitive touch screen of the embodiment of the present invention can re-calibrate by determining whether the capacitive touch screen freezes, and re-calibrate when determining that the capacitive touch screen freezes, so that the terminal can accurately determine the reference value, thereby avoiding The problem of freezing the screen occurs when the terminal wakes up, thereby improving the user experience.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiments, and details are not described herein.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separate, and the components displayed as the unit may or may not be physical units, i.e., may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be a software product. The computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all of the methods described in various embodiments of the present invention. Or part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code. .

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent person can be easily conceived within the technical scope of the present invention by anyone skilled in the art. Modifications or substitutions are intended to be included within the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

A method for calibrating a capacitive touch screen, comprising:

Receiving a signal waking up the capacitive touch screen;

Calibrating the capacitive touch screen;

Determining whether the capacitive touch screen has a frozen screen;

The capacitive touch screen is recalibrated when it is determined that the capacitive touch screen is frozen.

2. The method according to claim 1, wherein the determining whether the capacitive touch screen generates a freeze screen comprises:

Detecting whether the capacitive touch screen has at least one touch point to receive a touch signal all the time;

When the capacitive touch screen has the at least one touch point, it is determined that the capacitive touch screen is frozen.

The method according to claim 1, wherein the determining whether the capacitive touch screen generates a frozen screen comprises:

Detecting whether the capacitive touch screen has at least two touch points and simultaneously receiving a touch signal;

When the capacitive touch screen has the at least two touch points, it is determined that the capacitive touch screen freezes.

Detecting whether there is an effective sliding operation on the capacitive touch screen;

When there is an effective sliding operation on the capacitive touch screen, it is determined that the capacitive touch screen does not freeze.

A terminal, comprising a capacitive touch screen, wherein the terminal further comprises:

a receiving module, configured to receive a signal for waking up the capacitive touch screen;

a calibration module, configured to calibrate the capacitive touch screen;

a freeze screen determining module, configured to determine whether a frozen screen occurs on the capacitive touch screen;

And a recalibration module, configured to recalibrate the capacitive touch screen when the freeze screen determination module determines that the capacitive touch screen is frozen.

The terminal according to claim 5, wherein the freeze screen determining module comprises: a first detecting unit, configured to detect whether the capacitive touch screen has at least one touch point to receive a touch signal;

a first determining unit, configured to detect, by the first detecting unit, that the capacitive touch screen has the at least one When the touch point is touched, it is determined that the capacitive touch screen is frozen.

The terminal according to claim 5, wherein the freeze screen determining module comprises: a second detecting unit, configured to detect whether the capacitive touch screen has at least two touch points and simultaneously receive a touch signal;

The terminal according to claim 5, wherein the freeze screen determining module comprises: a third detecting unit, configured to detect whether the capacitive touch screen has an effective sliding operation; and a third determining unit, configured to: When the third detecting unit detects that there is an effective sliding operation on the capacitive touch screen, it is determined that the capacitive touch screen does not freeze.