Patent Publication Number: US-11397501-B2

Title: Coordinate measuring apparatus for measuring input position of coordinate indicating apparatus, and method of controlling the same

Description:
PRIORITY 
     This application is a continuation application of U.S. patent application Ser. No. 15/934,193, which was filed on Mar. 23, 2018, which is a continuation application of U.S. patent application Ser. No. 14/322,457, which was filed on Jul. 2, 2014 and issued as U.S. Pat. No. 9,927,938 on Mar. 27, 2018, and claims priority under 35 U.S.C. § 119(a) to Korean Application Serial No. 10-2013-0078176, which was filed in the Korean Intellectual Property Office on Jul. 4, 2013, the entire content of each of which is hereby incorporated by reference. 
    
    
     BACKGROUND 
     1. Field of the Invention 
     The present invention relates generally to a coordinate measuring apparatus for measuring an input position of a coordinate indicating apparatus, such as a finger or a stylus pen, and a method of manufacturing the same. 
     2. Description of the Related Art 
     In recent years, smart phones or tablet Personal Computers (PCs) have increased in popularity. A smart phone or a tablet PC mainly includes a touch screen, through which a user may enter an input at a specific coordinate by using a finger or a stylus pen. 
     The touch screen may operate using electrical methods, infrared methods, ultrasonic methods, etc. Examples of the electrical methods may include a Resistance (R) type touch screen and a Capacitive (C) type touch screen. 
     To date, R type touch screens, which recognize both a finger of a user and a stylus pen, are more commonly used, but the R type touch screens often have a problem caused by reflection due to a layer of air between transparent conducting film layers, for example, Indium Tin Oxide (ITO) layers. That is, transmittance of light transmitted from a display is lowered by a layer of air between ITO layers, and light reflection on a screen increases. 
     Accordingly, the use of C type touch screens has recently increased. The C type touch screens detect a difference between electrostatic capacities of a transparent electrode generated by a contact of an object. However, because it is difficult for the C type touch screens to physically distinguish a hand from a pen, the C type touch screens often generate operation errors due to an unintended contact of a hand during use thereof. 
     To address some of the drawbacks of the R and C type touch screens, Electro Magnetic Resonance (EMR) has been used, by including a separate coordinate measuring apparatus in addition to a C type touch screen. 
     For example, some recent smart phones or tablet PCs include both a C type panel and an EMR type panel. These smart phones or tablet PCs can detect inputs of both a portion of a body of a user and a stylus pen, in which case a C type panel can detect, for example, an input by a portion of a body of a user, e.g., a finger, and an EMR type panel can detect an input by another device, such as a stylus pen. However, when a user inputs an instruction to a smart phone or tablet PC while holding a stylus pen, a portion of a hand of the user often contacts the touch screen. Accordingly, the C type panel may still recognize the portion of the hand of the user as an instruction for touching a specific object, and thus an error will still occur. 
     SUMMARY 
     Accordingly, the present invention has been made to solve at least the above-described problems occurring in the prior art, and to provide at least the following advantages. 
     An aspect of the present invention is to provide a coordinate measuring apparatus and method for correctly measuring an input position of a coordinate indicating apparatus, by activating only a portion of a C type panel, when a signal by a pen is detected. 
     In accordance with an aspect of the present invention, a touch sensor is provided for detecting a contact position of a human body and a coordinate-indicating apparatus, the touch sensor including first detecting circuitry capable of detecting a contact position of a portion of the human body; second detecting circuitry capable of detecting a contact position of the coordinate-indicating apparatus; and a controller configured to identify, through the second detecting circuitry, an electromagnetic signal provided by the coordinate-indicating apparatus, and identify a detecting area based on the electromagnetic signal, with at least part of the touch sensor corresponding to the detecting area being activated and remaining parts of the touch sensor other than the at least part of the detecting area being deactivated. 
     In accordance with another aspect of the present invention, a touch sensor for detecting a contact position of a human body and a coordinate-indicating apparatus is provided, the touch sensor including first detecting circuitry, second detecting circuitry and a controller configured to identify, through the second detecting circuitry, an electromagnetic signal provided by the coordinate-indicating apparatus, identify a location of the coordinate-indicating apparatus based on the electromagnetic signal, and identify a detecting area of the first detecting circuitry based on the location of the coordinate-indicating apparatus, with the controller configured to identify a signal output from the detecting area as being generated by a touch intended by a user and identify a signal output from a remaining area of the first detecting circuitry other than the detecting area as being generated by a touch unintended by the user. 
     In accordance with a further aspect of the present invention, a method is provided for controlling a touch sensor including first detecting circuitry capable of detecting a contact position of a portion of a human body and second detecting circuitry capable of detecting a contact position of an coordinate-indicating apparatus, with the method including identifying, through the second detecting circuitry, an electromagnetic signal provided by the coordinate-indicating apparatus and identifying a detecting area based on the electromagnetic signal, with at least part of the touch sensor corresponding to the detecting area is activated and remaining parts of the touch sensor other than the at least part of the detecting area are deactivated. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  illustrates a coordinate indicating system according to an embodiment of the present invention; 
         FIG. 2  is a block diagram illustrating a coordinate measuring apparatus according to an embodiment of the present invention; 
         FIG. 3  is a side view illustrating a physical disposition of a first touch panel, a second touch panel, and a display, according to an embodiment of the present invention; 
         FIG. 4  illustrates a selection circuit and a loop according to an embodiment of the present invention; 
         FIGS. 5A to 5D  are flowcharts illustrating methods of controlling a coordinate measuring apparatus according to embodiments of the present invention; 
         FIGS. 6A to 6C  illustrate coordinate measuring apparatuses according to embodiments of the present invention; 
         FIG. 7  is a flowchart illustrating a method of controlling a coordinate measuring apparatus according to an embodiment of the present invention; 
         FIGS. 8A to 8B  illustrate an operation of a coordinate measuring apparatus according to an embodiment of the present invention; and 
         FIGS. 9A to 9B  illustrate an operation of a coordinate measuring apparatus according to an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION 
     Hereinafter, various embodiments of the present invention will be described more specifically with reference to the accompanying drawings. It should be noted that the same components of the drawings are designated by the same reference numeral anywhere. In the following description of the present disclosure, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present disclosure rather unclear. 
       FIG. 1  illustrates a coordinate indicating system according to an embodiment of the present invention. 
     Referring to  FIG. 1 , a coordinate measuring apparatus  100  may detect an input of a coordinate indicating apparatus  1 , e.g., a stylus pen, or a portion of a body of a user such as a finger, and measure a coordinate of an input position. 
     Although  FIG. 1  illustrates the coordinate measuring apparatus  100  as a smart phone or a tablet PC, the type of the coordinate measuring apparatus  100  is not particularly limited thereto. For example, the coordinate measuring apparatus  100  may be a device for measuring a coordinate, such as a digitizer, a C type ITO electrode, or a display device, which will be described below in more detail without limitation. 
     The coordinate indicating apparatus  1  may contact the coordinate measuring apparatus  100  to designate a specific coordinate of the coordinate measuring apparatus  100 . The coordinate indicating apparatus  1  may have a relatively small contact tip as compared with that of a fingertip. 
     The coordinate measuring apparatus  100  may determine whether a touch is generated by the coordinate indicating apparatus  1  or by a finger. That is, the coordinate measuring apparatus  100  may distinguish a type of a contact object. Herein, the contact object may be a conductive object such as a finger or a stylus pen which distinguishable from the conductive object. 
     First, the coordinate measuring apparatus  100  may measure an input position of the contact object, e.g., according to a change in capacitance due to a contact by the contact object. The measurement of a coordinate due to a change in capacitance will be described in more detail. Accordingly, the coordinate measuring apparatus  100  may measure both a coordinate of a finger and a coordinate of the coordinate indicating apparatus  1 . 
     For example, the coordinate measuring apparatus  100  may include a digitizer (not shown) that may include at least one loop, which transmits an electromagnetic transmission signal (hereinafter, a Tx signal) to the coordinate indicating apparatus  1  based on a preset timing schedule. 
     For example, the coordinate indicating apparatus  1  may include a resonance circuit, which outputs the received Tx signal. The signal output from the coordinate indicating apparatus  1  is often referred to as an electromagnetic reception signal (hereinafter, referred to as a Reception (Rx) signal). 
     The at least one loop receives the Rx signal from the coordinate indicating apparatus  1 , and determines an input position of the coordinate indicating apparatus  1  based on an intensity of the received Rx signal. For example, the coordinate measuring apparatus  100  may interpolate the intensities of Rx signals input to the loops, and may determine an input position of the coordinate indicating apparatus  1  based on the interpolation result. 
     The coordinate measuring apparatus  100  may also include a touch screen panel, e.g., a C type touch screen panel, which may detect a change in capacitance according to a physical input of a finger or the coordinate indicating apparatus  1 . The touch screen panel may determine an input position based on the detected change in capacitance. 
     The coordinate measuring apparatus  100  may also include a display unit for processing a display signal and providing visual data to a user. 
       FIG. 2  is a block diagram illustrating a coordinate measuring apparatus according to an embodiment of the present invention. 
     Referring to  FIG. 2 , a coordinate measuring apparatus  100  may be connected to an external device by using a mobile communication module  120 , a sub communication module  130 , and a connector  165 . Examples of the external device include a mobile phone, a smart phone, a tablet PC, a server, etc. 
     The coordinate measuring apparatus  100  includes a touch screen  190 , a touch screen controller  195 , a controller  110 , a mobile communication module  120 , a sub-range communication module  130 , a multimedia module  140 , a camera module  150 , a Global Positioning System (GPS) module  155 , an input/output module  160 , a sensor module  170 , a storage unit  175 , and a power supply  180 . The sub-range communication module  130  includes a Wireless Local Area Network (WLAN) module  131  and a short range communication module  132 , e.g., a Near Field Communication (NFC) module. The multimedia module  140  includes a broadcasting communication module  141 , an audio playback module  142 , and a video playback module  143 . The camera module  150  includes a first camera  151  and a second camera  152 , and the input/output module  160  includes a button  161 , a microphone  162 , a speaker  163 , a vibration motor  164 , a connector  165 , and a keypad  166 . 
     The controller  110  may include a Central Processing Unit (CPU)  111 , a Read Only Memory (ROM)  112  that stores a control program for controlling the coordinate measuring apparatus  100 , and a Random Access Memory (RAM)  113  that stores signals or data input from the outside of the coordinate measuring apparatus  100 , or is used as a storage region for operations performed by the coordinate measuring apparatus  100 . For example, the CPU  111  may include a single core, a dual core, a triple core, or a quad core. The CPU  111 , the ROM  112 , and the RAM  113  may be connected with each other through internal buses. 
     The controller  110  may control the mobile communication module  120 , the sub-range communication module  130 , the multimedia module  140 , the camera module  150 , the GPS module  155 , the input/output module  160 , the sensor module  170 , the storage unit  175 , the power supply unit  180 , the touch screen  190 , and the touch screen controller  195 . 
     The mobile communication module  120  connects the external apparatus to the coordinate measuring apparatus  100  through mobile communication by using one or more antennas (not shown) under the control of the controller  110 . The mobile communication module  120  transmits and receives radio signals for a voice call, a video call, a Short Message Service (SMS), or a Multimedia Message Service (MMS) to/from a portable phone, a smart phone, a tablet PC, or other devices that have telephone numbers or a network address input into the portable device  100 . 
     Although  FIG. 2  illustrates the sub-range communication module  130  may include the WLAN module  131  and the NFC module  132 , alternatively, the sub-range communication module  130  may include only the WLAN module  131  or only the NFC module  132 . 
     The WLAN module  131  may be connected to the Internet in a place in which a wireless Access Point (AP) is installed, under the control of the control unit  110 . The WLAN module  131  supports a WLAN standard (IEEE802.11x) of the Institute of Electrical and Electronics Engineers (IEEE). The NFC module  132  may wirelessly perform short-range communication between the coordinate measuring device  100  and an image forming device under a control of the controller  110 . Although  FIG. 2  illustrates an NFC module  132 , other short-range communication scheme may be used, such as Bluetooth and Infrared Data Association (IrDA) communication. 
     The coordinate measuring apparatus  100  may include at least one of the mobile communication module  120 , the wireless LAN module  131  and the short-range communication module  132  according to its performance. For example, the coordinate measuring apparatus  100  may include a combination of the mobile communication module  120 , the wireless LAN module  131  and the short-range communication module  132 , according to its performance. 
     The multimedia module  140  may include the broadcasting communication module  141 , the audio reproduction module  142  or the video reproduction module  143 . The broadcasting communication module  141  may receive a broadcasting signal (e.g., a TV broadcasting signal, a radio broadcasting signal, or a data broadcasting signal) or broadcasting additional information (e.g., Electric Program Guide (EPS) or Electric Service Guide (ESG)), which is transmitted from a broadcasting station through a broadcasting communication antenna under the control of the controller  110 . The audio playback module  142  may reproduce a stored or received digital audio file (e.g., a file of which the file extension is mp3, wma, ogg, or wav) under the control of the control unit  110 . The video playback module  143  may reproduce a stored or received digital video file (e.g., a file having a file extension of mpeg, mpg, mp4, avi, mov, or mkv) under the control of the controller  110 . The video playback module  143  may reproduce a digital audio file. 
     Although  FIG. 2  illustrates the multimedia module  140  may include the audio playback module  142 , the video playback module  143 , and the broadcasting communication module  141 , alternatively, at least one of the audio playback module  142 , the video playback module  143 , or the broadcasting communication module  141  may be included in multimedia module  140 . 
     Alternatively, the multimedia module  140  may be included in the controller  100 . 
     The first camera  151  and the second camera  152  photograph a still image or a moving image under the control of the controller  110 . Further, the first camera  151  or the second camera  152  may include an auxiliary light source (e.g., a flash) that provides an amount of light required for photographing. For example, the first camera  151  is disposed on a front surface of the coordinate measuring apparatus  100 , and the second camera  152  may be disposed on a rear surface of the coordinate measuring apparatus  100 , or the first camera  151  and the second camera  152  are arranged adjacent to each other (e.g., an interval between the first camera  151  and the second camera  152  is larger than 1 cm or smaller than 8 cm) to photograph a  3 D still image or a  3 D moving image. 
     The GPS module  155  may receive radio waves from a plurality of GPS satellites and may calculate a position of the coordinate measuring apparatus  100 . 
     In the input/output module  160 , the buttons  161  may be disposed on a front surface, a side surface or a rear surface of a housing of the coordinate measuring device  100 , and may include an electric power/lock button (not shown), a volume control button (not shown), a menu button, a home button, a back button, and a search button. 
     The microphone  162  receives a voice or a sound to generate an electrical signal under the control of the controller  110 . 
     The speaker  163  may output sounds corresponding to various signals (for example, a wireless signal, a broadcasting signal, a digital audio file, a digital video file, photographing a picture or the like) of the mobile communication module  120 , the sub-range communication module  130 , the multimedia module  140 , or the camera module  150  to an outside of the coordinate measuring device  100  under the control of the controller  110 . The speaker  163  may output sounds (e.g., a button operation sound or a ringtone corresponding to a voice call) corresponding to functions which the coordinate measuring apparatus  100  performs. One speaker  163  or a plurality of speakers  163  may be formed on a suitable position or positions of the housing of the electronic device  100 . 
     The vibration motor  164  may convert an electrical signal into a mechanical vibration under the control of the controller  110 . For example, in a vibration mode, the portable device  100  operates the vibration motor  164  when receiving a voice call from another device. One vibration motor  164  or a plurality of vibration motors  164  may be formed within the housing of the coordinate measuring apparatus  100 . The vibration motor  164  may also operate in response to a touch operation to provide tactile feedback. 
     The connector  165  may be used as an interface that interconnects the coordinate measuring apparatus  100  and an external apparatus or a power source. The coordinate measuring apparatus  100  may transmit data stored in the storage unit  175  of the coordinate measuring apparatus  100  to the external apparatus or receive data from the external apparatus through a wired cable connected to the connector  165  under the control of the control unit  110 . The coordinate measuring apparatus  100  may receive electric power from a power source or charge a battery, through the wired cable connected to the connector  165 . 
     The keypad  166  receives a key input from a user in order to control the coordinate measuring apparatus  100 . The keypad  166  includes a physical keypad formed in the coordinate measuring apparatus  100  or a virtual keypad displayed on the touch screen  190 . The physical keypad formed in the coordinate measuring apparatus  100  may be excluded according to a performance or structure of the coordinate measuring apparatus  100 . 
     The sensor module  170  includes at least one sensor for detecting a status of the coordinate measuring apparatus  100 . For example, the sensor module  170  may include a proximity sensor for detecting whether the user approaches the coordinate measuring apparatus  100 , an illumination intensity sensor for detecting an amount of light around the coordinate measuring apparatus  100 , or a motion sensor for detecting an operation of the coordinate measuring apparatus  100  (for example, a rotation of the coordinate measuring apparatus  100 , or an acceleration or vibrations applied to the coordinate measuring apparatus  100 ). The sensors of the sensor module  170  may be added or omitted according to the performance of the coordinate measuring apparatus  100 . 
     The storage unit  175  may store signals or data corresponding input/output to an operation of the mobile communication module  120 , the sub-range communication module  130 , the multimedia module  140 , the camera module  150 , the GPS module  155 , the input/output module  160 , the sensor module  170 , and the touch screen  190  under the control of the controller  110 . The storage unit  175  may store a control program for controlling the coordinate measuring apparatus  100  or the controller  110  and applications. 
     The term, “storage unit” may include the storage unit  175 , the ROM  112  and the RAM  113  in the control unit  110 , or a memory card (not shown), e.g., an SD card or a memory stick, mounted in the mobile apparatus  100 . The storage unit may include a non-volatile memory, a volatile memory, a Hard Disk Drive (HDD), and a Solid State Drive (SSD). 
     The power supply  180  may supply power to one battery or a plurality of batteries arranged at the coordinate measuring apparatus  100  according to a control of the controller  110 . The one or more batteries supply power to the coordinate measuring apparatus  100 . Further, the power supply unit  180  may supply the coordinate measuring apparatus  100  with power input from an external power source through a wired cable connected to the connector  165 . 
     The touch screen  190  may provide a user with a User Interface (UI) corresponding to various services (e.g., a voice call, data transmission, broadcasting, and photographing). The touch screen  190  may transmit an analog signal corresponding to at least one touch, which is input to the UI, to the touch screen controller  195 . The touch screen  190  may receive at least one touch through a user&#39;s body part (e.g., fingers including a thumb) or a touchable input means (e.g., a stylus pen). Further, the screen  190  may receive successive movements of one touch among the at least one touch. The touch screen  190  may transmit an analog signal corresponding to a continuous movement of an input touch to the touch screen controller  195 . 
     In addition, the touch is not limited to a touch between the touch screen  190  and a touch means, but includes a non-contact (for example, a case where an interval between the touch screen  190  and the user&#39;s body or the touch means is 1 mm or shorter). A distance of the non-contact input detected by the touch screen  190  may be changed according to the performance or the structure of the coordinate measuring apparatus  100 . 
     For example, the touch screen  190  may include a first touch panel  190   a  and a second touch panel  190   b . The first touch panel  190   a  may measure a touch or approach of a portion of the body of the user. For example, the first touch panel  190   a  may be realized in a resistive manner, a capacitive manner, an infrared manner, or an acoustic wave manner. Herein, the controller  110  may determine a signal for display control processing from detection signals of the first touch panel  190   a.    
     The second touch panel  190   b  may measure a touch or approach of an apparatus such as a stylus pen, i.e., the coordinate indicating apparatus  1 . For example, the second touch panel  190   b  utilizes an EMR method. 
     The display  190   c  may display an input image signal. 
     The touch screen controller  195  converts the analog signal received from the touch screen  190  to a digital signal (e.g., X and Y coordinates) and transmits the digital signal to the controller  110 . The controller  110  may control the touch screen  195  by using the digital signal received from the touch screen controller  190 . 
     Alternatively, the touch screen controller  195  may be included in the controller  110 . 
     The touch screen controller  195  may include a first touch panel controller  195   a  for controlling the first touch panel  190   a  and a second touch panel controller  195   b  for controlling the second touch panel  190   b.    
     Further, the controller  110  may detect various user inputs received through the camera module  150 , the input/output module  160 , and the sensor module  170 . The user input may include various types of information input into the coordinate measuring apparatus  100 , such as a gesture, a voice, a pupil action, a bio signal, etc., of the user in addition to the touch. The controller  110  may control an overall operation of the coordinate measuring apparatus  100  to perform a predetermined operation or function corresponding to a detected user input. 
       FIG. 3  is a side view illustrating a physical disposition of a first touch panel, a second touch panel, and a display, according to an embodiment of the present invention. Specifically,  FIG. 3  illustrates the first touch panel  190   a , the second touch panel  190   b , and the display  190   c.    
     Referring to  FIG. 3 , the display  190   c  may be disposed on the second touch panel  190   b , and the first touch panel  190   a  may be disposed on the display  190   c . The second touch panel  190   b  measures an electromagnetic signal received from the coordinate indicating apparatus  1  in order to measure an input point of the coordinate indicating apparatus  1 . The first touch panel  190   a  may measure a change in capacitance at a point with which a finger of the user contacts. Because the first touch panel  190   a  may be realized, for example, by an ITO, a user may recognize an image output from the display  190   c.    
       FIG. 4  illustrates a selection circuit and a loop according to an embodiment of the present invention. 
     Referring to  FIG. 4 , the loop  400  may include a first loop  401 , a second loop  402 , a third loop  403 , and a fourth loop  404 . The first to fourth loops  401  to  404  may be disposed lengthwise in the y-axis direction. The first to fourth loops  401  to  404  may transmit an electromagnetic signal, i.e., a Transmission (Tx) signal, or may receive an electromagnetic signal, i.e., an Rx signal. First to fourth switches  411  to  414  may be connected to ends of the first to fourth loops  401  to  404 . Opposite ends of the first to fourth loops  401  to  404  may be connected to a common terminal. 
     The controller  110  may control the first to fourth switches  411  to  414  of the selection circuit  410  to control connections of the first to fourth loops  401  to  404  to the controller  110 . For example, the controller  110  may control such that the first switch  411  is in an on state for a first sub-period. That is, the controller  110  may control such that the first loop  401  is connected to the controller  110  for the first sub-period. The controller  110  may control the second switch  412  such that the second loop  402  is connected to the controller  110  for a second sub-period, may control the third switch  413  such that the third loop  403  is connected to the controller  110  for a third sub-period, and may control the fourth switch  414  such that the fourth loop  404  is connected to the controller  110  for a fourth sub-period. 
       FIG. 5A  is a flowchart illustrating a method of controlling a coordinate measuring apparatus according to an embodiment of the present invention. 
     Referring to  FIG. 5A , the coordinate measuring apparatus may determine a detection state of the coordinate indicating apparatus in step S 501 . For example, the coordinate measuring apparatus may determine whether an intensity of the Rx signal received from the coordinate indicating apparatus is a predetermined value or more. When the intensity of the Rx signal received from the coordinate indicating apparatus is a preset value or more, the coordinate measuring apparatus may determine that the coordinate indicating apparatus is detected. When the intensity of the Rx signal received from the coordinate indicating apparatus is less than a preset value, the coordinate measuring apparatus may determine that the coordinate indicating apparatus is not detected. 
     In step S 503 , the coordinate measuring apparatus may determine an active area of the first touch panel in correspondence to a detection state of the coordinate indicating apparatus. For example, if it is determined that the coordinate indicating apparatus is detected, the coordinate measuring apparatus may activate only a preset portion of the first touch panel. If it is determined that the coordinate indicating apparatus is not detected, the coordinate measuring apparatus may activate the entire area of the first touch panel. 
     As described above, the first touch panel may detect a touch by a portion of the body of a user, such as a finger. Therefore, when a coordinate measuring apparatus such as a pen is detected, the coordinate measuring apparatus activates only a portion of the first touch panel and deactivates the remaining portions so that an inadvertent touch by a portion of a human body may not be detected. Accordingly, even if the user holding a stylus pen makes an input with the stylus pen while a portion of a hand also contacts with the touch screen, a malfunction caused by the hand contact can be prevented. 
       FIG. 5B  is a flowchart illustrating a method of controlling a coordinate measuring apparatus according to an embodiment of the present invention. The control method of  FIG. 5B  will be described in detail with reference to  FIGS. 6A to 6C , which illustrate coordinate measuring apparatuses according to embodiments of the present invention. 
     Referring to  FIG. 5B , the coordinate measuring apparatus may activate an entire area of a first touch panel in step S 511 .  FIG. 6A  illustrates a first panel of a coordinate measuring apparatus according to an embodiment of the present invention. 
     Referring to  FIG. 6A , the first touch panel  190   a  may include an electrode part  601 , x-axis electrode wires  611 ,  612 ,  613 , and  614 , y-axis electrode wires  621 ,  622 ,  623 , and  624 , and an Integrated Circuit (IC)  630 . 
     The electrode part  601  may detect a touch of a portion of the body of the user. For example, a change in capacitance by a touch of a portion of the body of a user may be detected. The x-axis electrode wires  611 ,  612 ,  613 , and  614  and the y-axis electrode wires  621 ,  622 ,  623 , and  624  may output a signal input from the electrode part  601  to the IC  630 . The IC  630  may determine a touch point of a portion of the body of the user based on signals received from the x-axis electrode wires  611 ,  612 ,  613 , and  614  and the y-axis electrode wires  621 ,  622 ,  623 , and  624 . 
     As illustrated in  FIG. 6A , in step S 511  of  FIG. 5B , the controller  110  may activate the entire area of the electrode part  601 . 
     Referring back to  FIG. 5B , the coordinate measuring apparatus may detect a pen signal in step S 513 . For example, as illustrated in  FIG. 6B , the stylus pen  1  may approach the coordinate measuring apparatus. The second touch panel (not shown) may detect the stylus pen  1 . 
     If it is determined that a pen signal is detected in step S 513 , the coordinate measuring apparatus may activate only a preset portion of the first touch panel in step S 515 . For example, as illustrated in  FIG. 6C , the controller  110  may activate only an upper end portion  650  of the electrode part  601 . Accordingly, even if a portion of the body of the user contacts the remaining portions of the electrode part  601 , the IC  630  may not detect that contact. Accordingly, a malfunction by a portion of the body of the user can be prevented. In addition, the user may still input an edge flick from an upper side. 
     As illustrated in  FIG. 6C , because the preset portion  650  of the electrode part  601  is activated, the edge flick from the upper side from the user may be detected. 
       FIG. 5C  is a flowchart illustrating a method of controlling a coordinate measuring apparatus according to an embodiment of the present invention. 
     Referring to  FIG. 5C , the coordinate measuring apparatus may determine a detection state of the coordinate indicating apparatus in step S 521 . For example, the coordinate measuring apparatus may determine whether an intensity of the Rx signal received from the coordinate indicating apparatus is a predetermined value or more. When the intensity of the Rx signal received from the coordinate indicating apparatus is a preset value or more, the coordinate measuring apparatus may determine that the coordinate indicating apparatus is detected. When the intensity of the Rx signal received from the coordinate indicating apparatus is less than a preset value, the coordinate measuring apparatus may determine that the coordinate indicating apparatus is not detected. 
     In step S 523 , the coordinate measuring apparatus may determine a used signal from output signals of the first touch panel in correspondence to a detection state of the coordinate indicating apparatus. For example, if it is determined that the coordinate indicating apparatus is detected, the coordinate measuring apparatus may activate only a preset signal of the output signals of the first touch panel. If it is determined that the coordinate indicating apparatus is not detected, the coordinate measuring apparatus may use all signals of the first touch panel. 
     As described above, the first touch panel may detect a touch by a portion of the body of a user, such as a finger. When a coordinate measuring apparatus such as a pen is detected, the coordinate measuring apparatus uses only a preset signal of the output signals of the first touch panel and does not use the remaining portions, so that a touch by a portion of a human body may not be detected. Accordingly, even if the user holding a stylus pen makes an input with stylus pen while bringing a portion of a hand into contact with the touch screen, a malfunction due to hand contact can be prevented. 
       FIG. 5D  is a flowchart illustrating a method of controlling a coordinate measuring apparatus according to an embodiment of the present invention. The control method of  FIG. 5D  will also be described in detail with reference to  FIGS. 6A to 6C . 
     Referring to  FIG. 5D , the coordinate measuring apparatus may use all signals output from the first touch panel in step S 531 . For example, as illustrated in  FIG. 6A , the controller  110  may determine an input point of a portion of the body of the user by using all signals input from the x-axis electrode wires  611 ,  612 ,  613 , and  614  and the y-axis electrode wires  621 ,  622 ,  623 , and  624 . 
     Referring back to  FIG. 5D , the coordinate measuring apparatus may detect a pen signal in step S 533 . For example, as illustrated in  FIG. 6B , the stylus pen  1  may approach the coordinate measuring apparatus, and the second touch panel (not shown) may detect the stylus pen  1 . 
     If it is determined that a pen signal is detected in step S 533 , the coordinate measuring apparatus may activate only some signals of the signals output from the first touch panel in step S 535 . 
     For example, as illustrated in  FIG. 6C , the controller  110  may use only a signal output from the present portion  650  of the electrode part  601 . More specifically, the controller  110  may determine an input point of a portion of the body of the user by using only signals input from the x-axis electrode wires  611 ,  612 ,  613 , and  614  and a signal input from the y-axis electrode wire  621 . That is, the controller  110  does not use signals input from the y-axis electrode wires  622 ,  623 , and  624 . Accordingly, even if a portion of the body of the user contacts a portion corresponding to the y-axis electrode wires  622 ,  623 , and  624 , a malfunction due to this contact can be prevented. 
       FIG. 7  is a flowchart illustrating a method of controlling a coordinate measuring apparatus according to an embodiment of the present invention. Further, the control method illustrated in  FIG. 7  will be described in detail with reference to  FIGS. 8A and 8B , which illustrate coordinate measuring apparatus according to an embodiment of the present invention. 
     Referring to  FIG. 7 , the coordinate measuring apparatus may activate an entire area of the first touch panel in step S 701 . The coordinate measuring apparatus may determine whether a height of the coordinate indicating apparatus from the second touch panel is below a hovering height in step S 703 . If a height of the coordinate indicating apparatus from the second touch panel is above the hovering height in step S 703 , the coordinate measuring apparatus maintains activation of the entire area of the first touch panel in step S 701 . 
     For example, as illustrated in  FIG. 8A , when a distance between the second touch panel  190   b  and the coordinate indicating apparatus  1  is a greater than the hovering height h, the coordinate measuring apparatus maintains the activation of the entire area of the first touch panel. For example, whether a distance between the coordinate indicating apparatus  1  and the second touch panel  190   b  is lower than the hovering height h may be determined based on an intensity of the Rx signal input from the coordinate indicating apparatus  1  to the second touch panel  190   b , e.g., if an intensity of the Rx signal input from the coordinate indicating apparatus  1  to the second touch panel  190   b  is greater than a preset threshold value. 
     For example, when an intensity of the Rx signal input from the coordinate indicating apparatus  1  to the second touch panel  190   b  is less than or equal to a preset threshold value, the controller  110  may determine that the distance between the coordinate indicating apparatus  1  and the second touch panel  190   b  is greater than the hovering height h. However, when the intensity of the Rx signal input from the coordinate indicating apparatus  1  to the second touch panel  190   b  is greater than the preset threshold value, the controller  110  may determine that the distance between the coordinate indicating apparatus  1  and the second touch panel  190   b  is within the hovering height h, as illustrated in  FIG. 8B . 
     If a height from the second touch panel of the coordinate indicating apparatus is lower than the hovering height in step S 703 , the coordinate measuring apparatus may activate only a preset portion of the first touch panel in step S 715 . For example, as illustrated in  FIG. 8B , when a distance between the second touch panel  190   b  and the coordinate indicating apparatus  1  is less than the hovering height h, the coordinate measuring apparatus may activate only the preset portion of the first touch panel. 
     Basically, the coordinate measuring apparatus may determine an activated area of the first touch panel according to a distance of a coordinate indicating apparatus therefrom. 
       FIGS. 9A to 9B  illustrate a coordinate measuring apparatus according to an embodiment of the present invention. 
     Referring to  FIG. 9A , the coordinate indicating apparatus  1  may touch a first point  900  on the touch screen. At the same time, the user&#39;s hand may also touch the touch screen. For example, when the user holds the coordinate indicating apparatus  1  with the right hand, the right hand of the user may contact a portion of the touch screen within in a preset area of the first point  900 . Therefore, to prevent an input being generating from the right hand contact, the controller  110  may determine a preset area  910  as an activated area, and a preset area  920  as a deactivated area, as illustrated in  FIG. 9B . 
     Alternatively, the controller  110  use only signals output from the x-axis electrode wires  611  and  612  and the y-axis electrode wires  621  and  622 , and may not use signals output from the x-axis electrode wires  613  and  614  and the y-axis electrode wires  623  and  624 . 
     As described above, only a portion that a hand of a user may contact is deactivated to prevent a malfunction. 
     Further, deactivation of a portion within in a preset area of the first point  900  is simply exemplary, and a portion that a hand of a user may contact in relation to a portion that the coordinate indicating apparatus  1  contacts can be deactivated using various methods. 
     The above-described, various embodiments of the present invention provide different methods and coordinate measuring apparatuses for correctly measuring an input position of a coordinate indicating apparatus, by activating only a portion of a C type panel when a signal by a pen is detected. Accordingly, a malfunction can be prevented, even when a user&#39;s hand inadvertently contacts a touch screen while the user inputs an instruction to the touch screen using the pen. In addition, a touch by a hand can still be detected when a user touches a frequently used portion with the user&#39;s hand. 
     While the present invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.