KR20120026397A - Method for detecting and repairing error of touch screen linearity and device thereof - Google Patents

Abstract

PURPOSE: A self correcting method and apparatus thereof are provided to improve the effectiveness of a touch screen by automatically checking bad linearity cells. CONSTITUTION: The X-Y coordinate of a touch screen and a wave value allocated to the X-Y coordinate are stored in a database(S31). When malfunction is generated in touch input operation, a cell where bad linearity is generated is distinguished(S33). The waveform value of the cell is acquired. The waveform value is stored by mapping the cell with the waveform value of the X-Y coordinate(S34). A screen for the waveform value of the cell is displayed by the touch input operation.

Description

METHOD FOR DETECTING AND REPAIRING ERROR OF TOUCH SCREEN LINEARITY AND DEVICE THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch screen laminated or bonded to a liquid crystal display, and more particularly, to a method and apparatus for determining and correcting a failure of touch screen linearity.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal may be further classified into a handheld terminal and a vehicle mount terminal according to whether a user can directly carry it.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In order to support and increase the function of such a terminal, it may be considered to improve the structural part and / or the software part of the terminal.

In general, a touch screen (or touch window) is a terminal-mounted input means, which is used by being laminated or bonded to the surface of an image display device such as a liquid crystal display device. , A stylus pen, or a touch pen) to display information corresponding to the selected content on the screen. However, as the number of times of use of the touch window increases by the user, a problem of poor linearity with respect to the touch input may occur, which may cause a malfunction.

SUMMARY OF THE INVENTION An object of the present invention is to prevent a malfunction by correcting a poor linearity of a touch screen by providing a method and apparatus for searching for a poor linearity of a touch screen, and determining a poor position to correct a poor touch screen.

In addition, an object of the present invention is to extend the service life of the touch window by correcting the position of the poor linearity in the touch window without replacing the touch window due to the poor linearity of the touch screen.

One example of the present invention for realizing the above problem is

Storing and storing the touch screen as a database of XY coordinate points and waveform values assigned to each XY coordinate point; If a touch input malfunctions during use of the touch screen, operating a self-calibration program to determine a cell in which a linearity defect of the touch screen occurs; After acquiring a waveform value of the determined poor linearity cell; The acquired waveform values are mapped to waveform values of cells having poor linearity and stored in the database. Thereafter, when the cell having poor linearity is selected by the touch input, since the mapped waveform value points to the XY coordinate point selected by the touch input, no malfunction occurs.

The present invention configured as described above has the effect of increasing the use efficiency of the touch screen by self-checking a cell having poor linearity on the touch screen and mapping a waveform value corresponding to the cell having poor linearity by self.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
Figure 2a is a front perspective view of a mobile terminal according to an embodiment of the present invention.
2B is a rear perspective view of a mobile terminal according to an embodiment of the present invention.
3 is a flowchart illustrating a method of determining and correcting a linearity defect of a touch screen according to an embodiment of the present invention.
4 is a diagram illustrating an XY coordinate point of a touch screen according to one embodiment of the present invention.
FIG. 5 is a diagram illustrating a cell in which an abnormal waveform is generated with respect to a touch input in a touch screen according to one embodiment of the present invention.
6 is an example of a screen provided by a self-correction program according to an embodiment of the present invention.
FIG. 7 is a diagram for distinguishing and displaying a cell in which an error occurs and a normal cell with respect to a touch input.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In addition, it should be noted that the accompanying drawings are only for easily understanding the spirit of the present invention and should not be construed as limiting the spirit of the present invention by the accompanying drawings.

Overall configuration of the mobile terminal

The mobile terminal described herein may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), navigation, and the like. However, it will be readily apparent to those skilled in the art that the configuration according to the embodiments described herein may also be applied to fixed terminals such as digital TVs, desktop computers, etc., except when applicable only to mobile terminals.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. The components shown in FIG. 1 are not essential, so that a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules that enable wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and a network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may mean a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a previously generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

The broadcast related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast related information may exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 may include, for example, Digital Multimedia Broadcasting-Terrestrial (DMB-T), Digital Multimedia Broadcasting-Satellite (DMB-S), Media Forward Link Only (MediaFLO), and Digital Video Broadcast (DVB-H). Digital broadcast signals can be received using digital broadcasting systems such as Handheld and Integrated Services Digital Broadcast-Terrestrial (ISDB-T). Of course, the broadcast receiving module 111 may be configured to be suitable for not only the above-described digital broadcasting system but also other broadcasting systems.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives a wireless signal with at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

The wireless internet module 113 refers to a module for wireless internet access and may be embedded or external to the mobile terminal 100. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

The location information module 115 is a module for obtaining a location of a mobile terminal, and a representative example thereof is a GPS (Global Position System) module.

Referring to FIG. 1, the A / V input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video call mode or the photographing mode. The processed image frame may be displayed on the display unit 151.

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. Two or more cameras 121 may be provided according to the use environment.

The microphone 122 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. The microphone 122 may implement various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for the user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like.

The sensing unit 140 detects a current state of the mobile terminal 100 such as an open / closed state of the mobile terminal 100, a location of the mobile terminal 100, presence or absence of a user contact, orientation of the mobile terminal, acceleration / deceleration of the mobile terminal, and the like. To generate a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be sensed. The sensing unit 140 may include a proximity sensor 141.

The output unit 150 is used to generate an output related to sight, hearing, or tactile sense, and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154. Can be.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in a call mode, the mobile terminal displays a user interface (UI) or a graphic user interface (GUI) related to the call. When the mobile terminal 100 is in a video call mode or a photographing mode, the mobile terminal 100 displays photographed and / or received images, a UI, and a GUI.

The display unit 151 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible). and at least one of a 3D display.

Some of these displays can be configured to be transparent or light transmissive so that they can be seen from the outside. This may be referred to as a transparent display. A representative example of the transparent display is TOLED (Transparant OLED). The rear structure of the display unit 151 may also be configured as a light transmissive structure. With this structure, the user can see the object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the implementation form of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another, or may be disposed integrally with one another, and may be disposed on different surfaces, respectively.

When the display unit 151 and a sensor for detecting a touch operation (hereinafter, referred to as a touch sensor) form a mutual layer structure (hereinafter referred to as a touch screen), the display unit 151 may be configured in addition to an output device. Can also be used as an input device. The touch sensor may have, for example, a form of a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in pressure applied to a specific portion of the display unit 151 or capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor may be configured to detect not only the position and area of the touch but also the pressure at the touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and then transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or an object present in the vicinity without using a mechanical contact by using an electromagnetic force or infrared rays. Proximity sensors have a longer life and higher utilization than touch sensors.

Examples of the proximity sensor include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. When the touch screen is capacitive, the touch screen is configured to detect the proximity of the pointer by the change of the electric field according to the proximity of the pointer. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the proximity touch is performed by the pointer on the touch screen refers to a position where the pointer is perpendicular to the touch screen when the pointer is in proximity proximity.

The proximity sensor detects a proximity touch and a proximity touch pattern (for example, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, and a proximity touch movement state). Information corresponding to the sensed proximity touch operation and proximity touch pattern may be output on the touch screen.

The sound output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output module 152 may also output a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The sound output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying occurrence of an event of the mobile terminal 100. Examples of events occurring in the mobile terminal include call signal reception, message reception, key signal input, and touch input. The alarm unit 153 may output a signal for notifying occurrence of an event in a form other than a video signal or an audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152, so that they 151 and 152 may be classified as part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. Vibration is a representative example of the haptic effect generated by the haptic module 154. The intensity and pattern of vibration generated by the haptic module 154 can be controlled. For example, different vibrations may be synthesized and output or may be sequentially output.

In addition to vibration, the haptic module 154 may be configured to provide a pin array that vertically moves with respect to the contact skin surface, a jetting force or suction force of air through an injection or inlet port, grazing to the skin surface, contact of an electrode, electrostatic force, and the like. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

The haptic module 154 may not only deliver a tactile effect through direct contact, but may also be implemented so that a user may feel the tactile effect through a muscle sense such as a finger or an arm. Two or more haptic modules 154 may be provided according to a configuration aspect of the mobile terminal 100.

The memory 160 may store a program for the operation of the controller 180 and may temporarily store input / output data (for example, a phone book, a message, a still image, a video, etc.). The memory 160 may store data relating to various patterns of vibration and sound output when a touch input on the touch screen is performed.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), RAM (Random Access Memory, RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Memory, Magnetic It may include a storage medium of at least one type of disk, optical disk. The mobile terminal 100 may operate in connection with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device, receives power, transfers the power to each component inside the mobile terminal 100, or transmits data inside the mobile terminal 100 to an external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip that stores various types of information for authenticating the usage rights of the mobile terminal 100, and includes a user identification module (UIM), a subscriber identify module (SIM), and a universal user authentication module ( Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

The interface unit may be a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or various command signals input from the cradle by a user may be transferred. It may be a passage that is delivered to the terminal. Various command signals or power input from the cradle may be operated as signals for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, perform related control and processing for voice calls, data communications, video calls, and the like. The controller 180 may include a multimedia module 181 for playing multimedia. The multimedia module 181 may be implemented in the controller 180 or may be implemented separately from the controller 180.

The controller 180 may perform a pattern recognition process for recognizing a writing input or a drawing input performed on the touch screen as text and an image, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

Various embodiments described herein may be implemented in a recording medium readable by a computer or similar device using, for example, software, hardware or a combination thereof.

According to a hardware implementation, the embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing other functions. The described embodiments may be implemented by the controller 180 itself.

According to the software implementation, embodiments such as the procedures and functions described herein may be implemented as separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code may be implemented in software applications written in a suitable programming language. The software code may be stored in the memory 160 and executed by the controller 180.

2A is a front perspective view of an example of a mobile terminal or a portable terminal according to the present invention.

The disclosed portable terminal 100 has a terminal body in the form of a bar. However, the present invention is not limited thereto and may be applied to various structures such as a slide type, a folder type, a swing type, a swivel type, and two or more bodies are coupled to be relatively movable.

The body includes a casing (casing, housing, cover, etc.) that forms an exterior. In this embodiment, the case may be divided into a front case 101 and a rear case 102. Various electronic components are built in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be further disposed between the front case 101 and the rear case 102.

The cases may be formed by injecting synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the audio output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, and the interface 170 may be disposed in the terminal body, mainly the front case 101. have.

The display unit 151 occupies most of the main surface of the front case 101. A sound output unit 151 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132 and the interface 170 may be disposed on side surfaces of the front case 101 and the rear case 102.

The user input unit 130 is manipulated to receive a command for controlling the operation of the portable terminal 100 and may include a plurality of operation units 131 and 132. The manipulation units 131 and 132 may also be collectively referred to as manipulating portions, and may be employed in any manner as long as the user operates the tactile manner with a tactile feeling.

Content input by the first or second manipulation units 131 and 132 may be variously set. For example, the first operation unit 131 receives commands such as start, end, scroll, and the like, and the second operation unit 132 controls the size of the sound output from the sound output unit 152 or the size of the sound output from the display unit 151 To the touch recognition mode of the touch screen.

FIG. 2B is a rear perspective view of the portable terminal shown in FIG. 2A.

Referring to FIG. 2B, a camera 121 ′ may be additionally mounted on the rear of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2A), and may be a camera having different pixels from the camera 121.

For example, the camera 121 has a low pixel so that the user's face is photographed and transmitted to the counterpart in case of a video call, and the camera 121 'photographs a general subject and does not transmit it immediately. It is desirable to have a high pixel because there are many. The cameras 121 and 121 'may be installed in the terminal body so as to be rotatable or pop-upable.

A flash 123 and a mirror 124 are further disposed adjacent to the camera 121 '. The flash 123 shines light toward the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to see his / her own face or the like when photographing (self-photographing) the user using the camera 121 '.

The sound output unit 152 'may be further disposed on the rear surface of the terminal body. The sound output unit 152 ′ may implement a stereo function together with the sound output unit 152 (see FIG. 2A), and may be used to implement a speakerphone mode during a call.

In addition to the antenna for talking and the like, a broadcast signal reception antenna 116 may be additionally disposed on the side of the terminal body. The antenna 116, which forms part of the broadcast receiving module 111 (see FIG. 1), can be installed to be able to be drawn out from the terminal body.

A power supply unit 190 for supplying power to the portable terminal 100 is mounted on the terminal body. The power supply unit 190 may be embedded in the terminal body or may be directly detachable from the outside of the terminal body.

The rear case 102 may be further equipped with a touch pad 135 for sensing a touch. Like the display unit 151, the touch pad 135 may also be configured to have a light transmission type. In this case, if the display unit 151 is configured to output time information on both sides, the time information can be recognized through the touch pad 135 as well. The information output on both surfaces may be controlled by the touch pad 135. Alternatively, a display may be additionally mounted on the touch pad 135, and a touch screen may be disposed on the rear case 102 as well.

The touch pad 135 operates in association with the display unit 151 of the front case 101. The touch pad 135 may be disposed parallel to the rear of the display unit 151. The touch pad 135 may have a size equal to or smaller than that of the display unit 151.

To determine the linearity of the touch screen Calibrated  Way

The present invention provides a method and system for using the service of an e-book content in order to solve the above problem.

The basic idea of the present invention is to save the coordinate values (the ADC values of the corresponding coordinates) of the touch screen are stored by default; Periodically testing the linearity of the touch screen according to a preset time; As a result of the test, determine a position (i.e., a bad cell in the touch screen) where an abnormal waveform occurs due to a poor linearity in the touch screen; By replacing the abnormal waveform with the corresponding coordinate value (that is, the ADC value) for the determined position, the defective cell of the touch screen determined to have poor linearity is corrected.

On the other hand, a poor linearity of the touch screen means that when a touch input is applied to the touch screen (or touch pad), for example, when a straight line is touched with a touch pen, the linear form of the touch screen does not bleed or tilt. It is the case that input coordinate value is not read. The ADC value is an analog waveform and corresponds to a value of a unique analog waveform corresponding to each coordinate of the touch screen. The description of the ADC value is a prior art, and a detailed description thereof will be omitted.

Hereinafter, for convenience of description of the present invention, it will be described on the assumption that the touch screen according to the present invention is laminated or bonded to the terminal.

3 is a flowchart illustrating a method of determining and correcting a linearity defect of a touch screen according to an embodiment of the present invention.

Referring to FIG. 3, the touch screen is divided into X and Y axes to form XY coordinate points, and each coordinate point is converted into a database and stored in the memory 160 (S31). In this case, step S31 may be performed at the time of mass production of the device (terminal) to which the embodiment of the present invention is applied, or may be performed when the device (terminal) to which the embodiment of the present invention is applied is initially booted. .

For example, as shown in FIG. 4, the touch screen is divided into XY coordinate points, and a unique ADC value is assigned to each coordinate point and stored in the memory 160. At this time, each XY coordinate point and each ADC value matching the XY coordinate point are stored.

If a user experiences a malfunction (ie poor linearity) due to a set period of time or a touch input malfunctions while the user is using the touch screen of the terminal 100, the controller 180 of the terminal 100 The self-correction program for determining the linearity failure is operated (S32). That is, as shown in FIG. 5, when linear touch inputs (ie, 51 to 56 in FIG. 5) are made in the Y-axis direction on the touch screen, for example, a first test is performed for the linearity test of the touch screen. 5 corresponds to a case where an abnormal waveform is taken as shown in the second touch input (52 in FIG. 5). That is, the second touch inputs other than the touch inputs (ie, 51, 53 to 56) have linearity with respect to the linear touch input, but the second touch input 52 has a poor linearity (57 in FIG. 5). This exists, and an abnormal waveform is taken.

In this case, the controller 180 of the terminal 100 operates the self-calibration program to provide a screen for determining the linearity defect of the touch screen as illustrated in FIG. 5 through the display unit 151. The user inputs a linear touch input in the horizontal direction (X-axis direction) or in the vertical direction (Y-axis direction) to determine a cell having poor linearity on the touch screen (S33). In this case, the cell corresponds to the XY coordinate point stored in step S31. 6 is an example of a screen provided when a self-calibration program is executed, and the user recognizes the specific cell (ie, XY coordinate value) stored in step S31 by touching the specific cell 61, for example. When the ADC value is found, it is determined as a cell that has no linearity error and is displayed in gray (or green or yellow, etc.).

FIG. 7 shows cells 57 (hereinafter referred to as “error cells”) in which an error (that is, abnormal waveform generation) has occurred in the touch input as hatched (or red, etc.) as a result of step S33. That is, in FIG. 7, the user inputs the touch screen in the horizontal direction 71 and / or the vertical direction 72 using a touch pen or the like to test the linearity of the cells. As a result, other cells except for the error cell 57 in which the abnormal waveform occurs in FIG. 7 are displayed on the screen as cells in which touch input is normally performed (for example, displayed as hatched, displayed in yellow or green). Meanwhile, in a state in which the self-calibration program is operated, the error cell 57 may be displayed on the touch screen so that the operation does not occur even when the user clicks with the touch pen. For example, the error cell is displayed in color by hatching. In addition, cells that normally operate may be processed without being hatched, and screens may be distinguished from each other.

That is, the controller 180 of the terminal 100 operates the self-calibration program, and the cell in which an error occurs in the user's touch input as shown in FIG. 7 (57 in FIG. 7) and the cell normally operating in FIG. 7 are hatched. The cells that have not been processed as are distinguished and displayed on the display unit 151. In this case, the controller 180 may determine the XY coordinate value and / or ADC value of the error cell 57 stored in the step S31 and the current ADC value of the error cell with respect to the cell 57 where the touch input error occurs. In other words, the analog values of the abnormal waveforms are compared and displayed in a hatched (or red, etc.) case when they are different from each other, thereby detecting the linearity defect of the touch screen. In addition, the controller 180 measures the current ADC value of the error cell 57, and converts the measured current ADC value (ie, the analog value of the abnormal waveform) into the ADC of the XY coordinate point corresponding to the error cell 57. After matching by the value, it is stored in the memory (S34). That is, the controller 180 converts the ADC value of the XY coordinate point corresponding to the error cell 57 to the current ADC value measured in step S34 in step S31. As a result, when the error cell 57 is touched after the step S34 is performed, the ADC value corresponding to the error cell 57 is read from the newly mapped ADC value in the step S34. 57) the normal operation is performed normally.

As described above, after the linearity of the touch screen is corrected for the cell in which the abnormal waveform is generated, the self-correction program is terminated by using the self-correction program (S35).

As described above, after converting the ADC value of the error cell through a series of processes of FIG. ADC value) The normal operation is performed by pointing the corresponding XY coordinate point of the error cell.

On the touch screen, Calibrated  Configuration of the terminal to which the method is applied

Hereinafter, a terminal according to the present invention will be described.

The configuration and function of the terminal according to the present invention will be described with reference to FIG. 1 through FIG. 2B with the focus on the function of the controller 180 of the terminal 100.

The functions and operations performed by the controller 180 of the terminal 100 according to the present invention are as described above. That is, if a defect occurs in the linearity of the touch screen, the controller 180 executes a self-calibration program, and determines a cell (that is, an error cell) and a cell that operates normally for a linear touch input of the user. Displayed on the display unit 151.

The controller 180 matches the current ADC value of the error cell (that is, the ADC value at which the abnormal waveform has occurred) with the ADC value of the corresponding XY coordinate point of the error cell, stores the result in a memory, and ends the self-calibration program. Let's do it.

In addition, according to an embodiment of the present invention, the above-described method may be implemented as code that can be read by a processor in a medium in which a program is recorded. Examples of processor-readable media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet). Include.

(Mobile terminal) having the above-described (name) is not limited to the configuration and method of the embodiments described above, the embodiments are all or all of the embodiments so that various modifications can be made Some may be optionally combined.

In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings.

Here, the terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, but should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all of the technical idea of the present invention, which can be replaced at the time of the present application It should be understood that there may be various equivalents and variations.

Claims (5)

(A) database-saving the XY coordinate point and the waveform value assigned to each XY coordinate point;
(B) determining a cell in which the linearity defect of the touch screen occurs if a touch input malfunctions during use of the touch screen;
(C) acquiring a waveform value of a cell in which the determined linearity is poor;
(D) mapping the obtained waveform value to a waveform value of an XY coordinate point corresponding to the cell having poor linearity; and storing the waveform value. The method of claim 1, wherein step (B)
Searching for a linear touch input on the touch screen;
And displaying, by the touch input, a waveform value of a cell having poor linearity on a screen. The method of claim 2,
And detecting a cell having a poor linearity and a cell having a normal linearity detected by the touch input and displaying the same on a screen. The method of claim 1, wherein the waveform value
Method for correcting poor linearity of a Turkish screen, characterized in that the ADC value. If the linearity of the touch screen is bad, run the self-calibration program,
Distinguish an error cell having a poor linearity detected by a touch input and a normal cell on the touch screen and display the same on a display unit,
And a controller which measures a waveform value of the error cell and maps the waveform value to the waveform value of the error cell.

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