Patent Publication Number: US-11392242-B2

Title: Fingerprint recognition touch sensor and electronic apparatus including the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a continuation application based on U.S. patent application Ser. No. 16/550,782, filed Aug. 26, 2019, in the US Patent and Trademark Office, which claims priority from Korean Patent Application No. 10-2019-0010664, filed on Jan. 28, 2019, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     Apparatuses consistent with embodiments relate to a touch sensor and an electronic apparatus including the touch sensor, and more particularly, to a fingerprint recognition touch sensor capable of performing both fingerprint recognition and touch sensing, and an electronic apparatus including the fingerprint recognition touch sensor. 
     2. Description of the Related Art 
     A touch screen is a simple and easy-to-use input device configured to recognize a touch position or related information on a screen, which a user contacts or presses by using a finger or the like, and transmit the touch position or the related information of the screen to a system. A capacitive touch screen has high transmittance, excellent durability, high touch resolution, and multi-touch capability. A touch screen panel is applied not only to mobile devices, such as smart phones, tablet personal computers (PCs), etc., but also to various electronic apparatuses, such as automatic teller machines (ATMs), automatic ticket issuing machines, navigation devices, etc. 
     Recently, a need for personal authentication for various mobile apparatuses and electronic apparatuses has gradually increased. Personal authentication functions using personal characteristics such as a fingerprint, a voice, a face, and an iris may be used in mobile devices, access control devices, and financial devices. Fingerprint recognition technologies of smart phones and tablet PCs according to existing methods are structured to include a fingerprint recognition module in addition to a touch screen module. 
     SUMMARY 
     According to embodiments, there is provided a touch sensor including a plurality of parallel transmitting lines extending in a first direction, a plurality of parallel receiving lines extending in a second direction crossing the first direction, and a transmitting driver configured to, in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines, and in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines, the second voltage being different than the first voltage. The touch sensor further includes a signal output unit configured to receive touch signals from the plurality of receiving lines. 
     The transmitting driver may be further configured to, in the first mode, sequentially apply one of the first driving signals of the first voltage, to each of the plurality of transmitting lines. 
     The transmitting driver may include a plurality of transmitting groups disposed in the second direction. Each of the plurality of transmitting groups may include adjacent ones of the plurality of transmitting lines. 
     The transmitting driver may be further configured to, in the second mode, sequentially apply the second driving signals of the second voltage, to each of the plurality of transmitting groups. 
     The plurality of transmitting groups may include a first transmitting group and a second transmitting group adjacent to the first transmitting group. The transmitting driver may be further configured to, in the second mode, apply the second driving signals of the second voltage simultaneously to first ones of the plurality of transmitting lines that are disposed in the first transmitting group, and then apply the second driving signals of the second voltage simultaneously to the second ones of the plurality of transmitting lines that are disposed in the second transmitting group. 
     The transmitting driver may include a plurality of transmitting circuits connected to the plurality of transmitting lines, respectively, a first voltage line configured to supply the first voltage to the plurality of transmitting circuits, and a second voltage line configured to supply the second voltage to the plurality of transmitting circuits. 
     The transmitting driver may be further configured to, in the first mode, connect the first voltage line to the plurality of transmitting circuits, and in the second mode, connect the second voltage line to the plurality of transmitting circuits. 
     The transmitting driver may be further configured to, in the first mode, sequentially and separately activate the plurality of transmitting circuits, and in the second mode, simultaneously activate ones of the plurality of transmitting circuits that are disposed in one of the plurality of transmitting groups. 
     The signal output unit may include a plurality of receiving groups disposed in the first direction. Each of the plurality of receiving groups may include adjacent ones of the plurality of receiving lines. 
     The signal output unit may include a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively, and a plurality of second receiving circuits. Each of the plurality of second receiving circuits may be disposed to correspond to a respective one of the plurality of receiving groups. 
     The signal output unit may be further configured to, in the first mode, connect the plurality of receiving lines respectively to the plurality of first receiving circuits, and simultaneously receive the touch signals through all of the plurality of first receiving circuits respectively connected to the plurality of receiving lines. 
     The signal output unit may be further configured to, in the second mode, connect ones of the plurality of receiving lines that are disposed in one of the plurality of receiving groups to one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups, and receive the touch signals through the one of the plurality of second receiving circuits connected to the ones of the plurality of receiving lines. 
     Each of the plurality of first receiving circuits may include a first feedback capacitor having a first capacitance, and each of the plurality of second receiving circuits may include a second feedback capacitor having a second capacitance greater than the first capacitance. 
     The transmitting driver may be further configured to, in a third mode, apply third driving signals of a third voltage lower than the first voltage and higher than the second voltage, to first ones of the plurality of transmitting lines that are sequentially disposed in one of the plurality of transmitting groups, and then apply the third driving signals of the third voltage to second ones of the plurality of transmitting lines that are sequentially disposed in the one of the plurality of transmitting groups. 
     The transmitting driver may include a plurality of transmitting circuits connected to the plurality of transmitting lines, respectively, a first voltage line configured to supply the first voltage to the plurality of transmitting circuits, a second voltage line configured to supply the second voltage to the plurality of transmitting circuits, and a third voltage line configured to supply the third voltage to the plurality of transmitting circuits. 
     The transmitting driver may be further configured to, in the first mode, connect the first voltage line to the plurality of transmitting circuits, in the second mode, connect the second voltage line to the plurality of transmitting circuits, and in the third mode, connect the third voltage line to the plurality of transmitting circuits. 
     The transmitting driver may be further configured to, in the first mode, sequentially and separately activate the plurality of transmitting circuits, in the second mode, simultaneously activate first ones of the plurality of transmitting circuits that are disposed in the one of the plurality of transmitting groups, and in the third mode, simultaneously activate second ones of the plurality of transmitting circuits that are connected to the first ones of the plurality of transmitting lines in the one of the plurality of transmitting groups, and then simultaneously activate third ones of the plurality of transmitting circuits that are connected to the second ones of the plurality of transmitting lines. 
     The signal output unit may include a plurality of receiving groups disposed in the first direction, each of the plurality of receiving groups may include adjacent ones of the plurality of receiving lines, and the signal output unit may further include a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively, and a plurality of second receiving circuits disposed to correspond to the plurality of receiving groups, respectively. 
     The signal output unit may be further configured to, in the third mode, receive the touch signals by connecting first ones of the plurality of receiving lines that are sequentially disposed in one of the plurality of receiving groups, to one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups, and then receive the touch signals by connecting second ones of the plurality of receiving lines that are sequentially disposed in the one of the plurality of receiving groups, to the one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups. 
     The signal output unit may include a plurality of receiving groups disposed in the first direction, and each of the plurality of receiving groups may include adjacent ones of the plurality of receiving lines. The signal output unit further may include a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively, a second receiving circuit disposed to correspond to first ones of the plurality of receiving lines that are sequentially disposed in each of the plurality of receiving groups, and a third receiving circuit disposed to correspond to second ones of the plurality of receiving lines that are sequentially disposed in each of the plurality of receiving groups. 
     The signal output unit may be further configured to, in the third mode, receive the touch signals by connecting the first ones of the plurality of receiving lines sequentially disposed in each of the plurality of receiving groups, to the second receiving circuit, while receiving the touch signals by connecting the second ones of the plurality of receiving lines sequentially disposed in each of the receiving groups, to the third receiving circuit. 
     The signal output unit may include a plurality of receiving groups disposed in the first direction, each of the plurality of receiving groups may include adjacent ones of the plurality of receiving lines, and the signal output unit may include a plurality of receiving circuits disposed to correspond to the plurality of receiving lines, respectively. 
     The signal output unit may be further configured to, in the first mode, connect the plurality of receiving lines respectively to the plurality of receiving circuits, and simultaneously receive the touch signals through all of the plurality of first receiving circuits respectively connected to the plurality of receiving lines, and in the second mode, receive the touch signals by connecting first ones of the plurality of receiving lines that are disposed in one of the plurality of receiving groups, to any first one of the plurality of receiving circuits in the one of the plurality of receiving groups. The signal output unit may be further configured to, in the third mode, receive the touch signals by connecting second ones of the plurality of receiving lines that are sequentially disposed in the one of the plurality of receiving groups, to any second one of the plurality of receiving circuits in the one of the plurality of receiving groups, and connecting third ones of the plurality of receiving lines that are sequentially disposed in the plurality of receiving groups, to another one of the plurality of receiving circuits in the one of the plurality of receiving groups. 
     The first mode may be a fingerprint recognition mode, the second mode may be a low resolution touch sensing mode, and the third mode may be a high resolution touch sensing mode. 
     According to embodiments, there is provided an electronic apparatus including a display panel, and a touch sensor including a plurality of parallel transmitting lines extending in a first direction, a plurality of parallel receiving lines extending in a second direction crossing the first direction, and a transmitting driver configured to, in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines, and in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines, the second voltage being different than the first voltage. The touch sensor further includes a signal output unit configured to receive touch signals from the plurality of receiving lines. 
     According to embodiments, there is provided a touch sensor including a plurality of parallel transmitting lines extending in a first direction, a plurality of parallel receiving lines extending in a second direction crossing the first direction, and a transmitting driver configured to, in a fingerprint recognition mode, apply first driving signals of a first voltage, to the plurality of transmitting lines, in a low resolution touch sensing mode, apply second driving signals of a second voltage, to the plurality of transmitting lines, the second voltage being different than the first voltage, and in a high resolution touch sensing mode, apply third driving signals of a third voltage, to the plurality of transmitting lines, the third voltage being lower than the first voltage and higher than the second voltage. The touch sensor further includes a signal output unit configured to receive touch signals from the plurality of receiving lines. 
     The transmitting driver may be further configured to, in the fingerprint recognition mode, sequentially apply one of the first driving signals of the first voltage, to each of the plurality of transmitting lines, in the low resolution touch sensing mode, sequentially apply the second driving signals of the second voltage, to each of a plurality of transmitting groups disposed in the second direction, each of the plurality of transmitting groups including adjacent ones of the plurality of transmitting lines, and in the high resolution touch sensing mode, sequentially apply the third driving signals of the third voltage, to each sub-group of the plurality of transmitting lines that is included in each of the plurality of transmitting groups. 
     The signal output unit may be further configured to, in the fingerprint recognition mode, simultaneously receive the touch signals from all of the plurality of receiving lines, in the low resolution touch sensing mode, receive the touch signals from one of a plurality of receiving groups disposed in the first direction, each of the plurality of receiving groups including adjacent ones of the plurality of receiving lines, and in the high resolution touch sensing mode, sequentially receive the touch signals from each sub-group of the plurality of receiving lines that is included in the one of the plurality of receiving groups. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram schematically illustrating an example of a structure of a touch sensor according to embodiments. 
         FIGS. 2A and 2B  are diagrams illustrating an example of an operation of a touch sensor in a fingerprint recognition mode, according to embodiments. 
         FIGS. 3A and 3B  are circuit diagrams illustrating an example of an operation of transmitting circuits disposed in a transmitting driver in a fingerprint recognition mode, according to embodiments. 
         FIG. 4  is a circuit diagram illustrating an example of an operation of receiving circuits disposed in a signal output unit in a fingerprint recognition mode, according to embodiments. 
         FIGS. 5A and 5B  are diagrams illustrating an example of an operation of a touch sensor in a touch sensing mode, according to embodiments. 
         FIG. 6  is a circuit diagram illustrating an example of an operation of transmitting circuits disposed in a transmitting driver in a touch sensing mode, according to embodiments. 
         FIG. 7  is a circuit diagram illustrating an example of an operation of receiving circuits disposed in a signal output unit in a touch sensing mode, according to embodiments. 
         FIG. 8  is a circuit diagram illustrating a structure of receiving circuits according to embodiments. 
         FIG. 9  is a diagram illustrating an example of an order in which a touch operation for each of areas on a touch panel is sensed in a high resolution touch sensing mode, according to embodiments. 
         FIGS. 10, 11, 12A, 12B, 13 and 14  are diagrams illustrating an example of an operation of a touch sensor in a high resolution touch sensing mode, according to embodiments. 
         FIG. 15  is a circuit diagram illustrating an example of a structure of receiving circuits disposed in a signal output unit, according to embodiments. 
         FIGS. 16, 17 and 18  are circuit diagrams illustrating an example of an operation of receiving circuits disposed in a signal output unit, according to embodiments. 
         FIG. 19  is a circuit diagram illustrating an example of a structure of receiving circuits disposed in a signal output unit, according to embodiments. 
         FIGS. 20 and 21  are circuit diagrams illustrating an example of an operation of receiving circuits disposed in a signal output unit, according to embodiments. 
         FIG. 22  is a block diagram illustrating an example of a structure of an electronic apparatus including a touch sensor, according to embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, a fingerprint recognition touch sensor and an electronic apparatus including the fingerprint recognition touch sensor will be described in detail with reference to the accompanying drawings. In the drawings hereinafter, like reference numerals refer to like elements and a size of each of components in the drawings may be exaggerated for clarity and convenience of description. Also, embodiments described hereinafter are only examples and various modifications may be possible based on the embodiments. Also, in a layered structure described hereinafter, an expression, such as “on” or “above,” may denote not only an element directly above/below/left to/right to another element by contacting the other element, but also an element above/below/left to/right to another element without contacting the other element. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. 
       FIG. 1  is a diagram schematically illustrating an example of a touch sensor  100  according to embodiments. Referring to  FIG. 1 , the touch sensor  100  may include a touch panel  110  in which a plurality of transmitting lines  121  that are parallel to each other and a plurality of receiving lines  131  that are parallel to each other are disposed to cross each other, a transmitting driver  120  configured to apply driving signals to the plurality of transmitting lines  121 , and a signal output unit  130  configured to receive touch signals from the plurality of receiving lines  131 . Also, the touch sensor  100  may further include a control circuit  140  configured to control operations of the transmitting driver  120  and the signal output unit  130 . In the drawings, the transmitting driver  120 , the signal output unit  130 , and the control circuit  140  are separately illustrated for convenience of description. However, the transmitting driver  120 , the signal output unit  130 , and the control circuit  140  may be realized as one electronic circuit. Also, the control circuit  140  may be disposed in an electronic apparatus including the touch sensor  100 . The touch panel  110  may be disposed on a display panel of an electronic apparatus or may be integrally manufactured with the display panel of the electronic apparatus. 
     The plurality of transmitting lines  121  parallel to each other may extend long in a first direction. Also, the plurality of receiving lines  131  parallel to each other may extend long in a second direction crossing the plurality of transmitting lines  121 . An end of each of the plurality of receiving lines  131  may be connected to the signal output unit  130 . The plurality of transmitting lines  121  and the plurality of receiving lines  131  may be disposed in different layers of the touch panel  110  in a height direction to not contact each other. Also, a dielectric may be disposed between the layer on which the plurality of transmitting lines  121  are disposed and the layer on which the plurality of receiving lines  131  are disposed. Thus, a node in which each of the plurality of transmitting lines  121  and each of the plurality of receiving lines  131  cross each other may operate as a capacitor. 
     The touch sensor  100  may sense a touch operation based on, for example, a capacitance method. In this case, self capacitance or mutual capacitance may be changed in the nodes in which the plurality of transmitting lines  121  and the plurality of receiving lines  131  cross each other, via a touch input or a fingerprint input, and a coordinate of the touch input or an image of a touch fingerprint may be calculated based on the changed capacitance in the plurality of touched nodes. Thus, the nodes in which the transmitting lines  121  and the receiving lines  131  cross each other may function as pixels for sensing a touch input or a fingerprint input. In the drawing, the plurality of transmitting lines  121  and the plurality of receiving lines  131  are indicated by using thin solid lines. However, actually, a plurality of transparent electrode patterns may be disposed along each of the plurality of transmitting lines  121  and the plurality of receiving lines  131 . 
     Also, the touch sensor  100  may be configured to perform both fingerprint recognition and touch sensing. To obtain a resolution that is sufficient to accurately recognize a pattern of a fingerprint, the transmitting lines  121  and the receiving lines  131  may be disposed at very narrow intervals, compared to a general touch sensor configured to sense only a touch operation. For example, the transmitting lines  121  and the receiving lines  131  may be disposed at intervals of about 50 μm to about 70 μm. 
     The touching sensing operation sensing a touch operation does not require high resolution, compared to the fingerprint recognition operation. When the touch sensing operation is performed by using the same method as the fingerprint recognition operation, power consumption of the touch sensor  100  may be increased and a time taken to scan the whole area of the touch panel  110  may be increased. Thus, the touch sensor  100  may be divided into an operation in a fingerprint recognition mode and an operation in a touch sensing mode, and the touch sensor  100  may differently operate in the fingerprint recognition mode and the touch sensing mode. 
     To this end, according to these embodiments, the plurality of transmitting lines  121  may be divided into a plurality of groups and the plurality of receiving lines  131  may be divided into a plurality of groups. For example, the transmitting driver  120  of the touch sensor  100  may include a plurality of transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e  disposed in the second direction in which the plurality of transmitting lines  121  are disposed. Each of the transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e  may include the plurality of transmitting lines  121  sequentially disposed to be adjacent to each other. Likewise, the signal output unit  130  of the touch sensor  100  may include a plurality of receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  disposed in the first direction in which the plurality of receiving lines  131  are disposed. Each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  may include the plurality of receiving lines  131  sequentially disposed to be adjacent to each other. 
     For example, for convenience,  FIG. 1  illustrates that the transmitting driver  120  includes the five transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e , one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  includes eight transmitting lines  121 , the signal output unit  130  includes the five receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e , and one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  includes eight receiving lines  131 . However, this is only an example, and the actual number of transmitting groups, the actual number of receiving groups, the actual number of transmitting lines  121 , and the actual number of receiving lines  131  may be much greater than the example. Also, the number of transmitting lines  121  assigned to one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  and the number of receiving lines  131  assigned to one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be four, ten, twelve, or more, rather than eight. Also, the number of transmitting lines  121  assigned to one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  and the number of receiving lines  131  assigned to one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be different from each other. 
     In the fingerprint recognition mode, the touch sensor  100  may sequentially apply a driving signal to each of the transmitting lines  121 , without taking into account the transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e.    
       FIGS. 2A and 2B  are diagrams illustrating an example of an operation of the touch sensor  100  in a fingerprint recognition mode, according to embodiments. Referring to  FIG. 2A , the transmitting driver  120  may apply a driving signal to the first transmitting line  121  indicated by a thick solid line and may not apply driving signals to the remaining transmitting lines  121 , under control of the control circuit  140 . Next, referring to  FIG. 2B , the transmitting driver  120  may apply a driving signal to the second transmitting line  121  indicated by a thick solid line and may not apply driving signals to the remaining transmitting lines  121 . Based on this method, the transmitting driver  120  may sequentially apply driving signals to the transmitting lines  121  in an order from the first transmitting line  121  to the last transmitting line  121  under control of the control circuit  140 . In this case, as illustrated in “A” in  FIG. 2A , an area in which one transmitting line  121  and one receiving line  131  cross each other may be a sensing unit. 
       FIGS. 3A and 3B  are circuit diagrams illustrating an example of an operation of transmitting circuits (Touch-Finger TX)  122  disposed in the transmitting driver  120  in a fingerprint recognition mode, according to embodiments. Referring to  FIGS. 3A and 3B , the transmitting driver  120  may include the plurality of transmitting circuits  122 , a first voltage line VDDH_H supplying a first voltage to the plurality of transmitting circuits  122 , and a second voltage line VDDH_L supplying a second voltage to the plurality of transmitting circuits  122 . Each of the transmitting circuits  122  may be connected to one transmitting line  121  corresponding thereto and may apply a driving signal to the corresponding transmitting line  121 . Thus, the number of transmitting circuits  122  in the transmitting driver  120  may be the same as the number of transmitting lines  121 . The first voltage line VDDH_H may provide a relatively high voltage to the transmitting circuits  122 , and the second voltage line VDDH_L may provide a relatively low voltage to the transmitting circuits  122 . 
     Referring to  FIG. 3A , the first transmitting circuit  122  may be activated in response to a transmitting control signal TX_EN of the control circuit  140 . Simultaneously, the control circuit  140  may connect the first voltage line VDDH_H providing a relatively high voltage, to the transmitting circuits  122 . Then, the first transmitting circuit  122 , which is activated, may apply the high voltage received from the first voltage line VDDH_H to the first transmitting line  121  connected thereto, as a driving signal. Thus, as illustrated in  FIG. 2A , the driving signal of a high voltage may be applied to the first transmitting line  121 . 
     Next, referring to  FIG. 3B , the second transmitting circuit  122  may be activated in response to a transmitting control signal TX_EN of the control circuit  140 . Then, the second transmitting circuit  122 , which is activated, may apply the high voltage received from the first voltage line VDDH_H to the second transmitting line  121  connected thereto, as a driving signal. Thus, as illustrated in  FIG. 3B , the driving signal of a high voltage may be applied to the second transmitting line  121 . 
     In the finger recognition mode, an area of the sensing unit illustrated in “A” is small, and thus, mutual capacitance may be less. Thus, to obtain a high signal to noise ratio (SNR) in the fingerprint recognition mode, the driving signal of the high voltage may be transmitted to the transmitting lines  121  by connecting the first voltage line VDDH_H to the transmitting circuits  122 . By doing so, a sensing sensitivity may be increased to increase the accuracy of fingerprint recognition. 
       FIG. 4  is a circuit diagram illustrating an example of an operation of receiving circuits disposed in the signal output unit  130  in a fingerprint recognition mode, according to embodiments.  FIG. 4  illustrates the receiving circuits disposed in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  of the signal output unit  130 . Referring to  FIG. 4 , the signal output unit  130  may include a plurality of fingerprint recognition receiving circuits (Finger RX)  132  and a plurality of touch sensing receiving circuits (Touch RX)  133 . Each of the fingerprint recognition receiving circuits  132  may be connected to one receiving line  131  corresponding thereto and may receive a touch signal generated due to a change ΔC M  in mutual capacitance from the connected receiving line  131  connected thereto. Thus, the total number of fingerprint recognition receiving circuits  132  may be the same as the total number of receiving lines  131  in the signal output unit  130 . 
     The touch sensing receiving circuits  133  may be disposed such that one touch sensing receiving circuit  133  corresponds to each of the plurality of receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e . In other words, one touch sensing receiving circuit  133  may be disposed in each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e . Thus, the total number of touch sensing receiving circuits  133  in the signal output unit  130  may be the same as the total number of receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e . One touch sensing receiving circuit  133  may be connected to all of the receiving lines  131  disposed in the receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  corresponding thereto. 
     In the fingerprint recognition mode, the signal output unit  130  may separately and simultaneously receive touch signals from all of the receiving lines  131 . To this end, the control circuit  140  may connect all the fingerprint recognition receiving circuits  132  in the signal output unit  130  to the receiving lines  131  corresponding thereto, through a first receiving control signal RX_EN 1 . Also, the control circuit  140  may disconnect the touch sensing receiving circuits  133  from the receiving lines  131  corresponding thereto, through a second receiving control signal RX_EN 2 . By doing so, the touch signals generated in the nodes between one transmitting line  121  to which the driving signal is applied and the plurality of receiving lines  131  crossing the transmitting line  121  may be separately sensed. 
     In the fingerprint recognition mode, the driving signal is sequentially applied to each of the plurality of transmitting lines  121  according to this method, so that the touch signals may be separately received from the plurality of receiving lines  131 . As described above, because the area of the node A in which one transmitting line  121  and one receiving line  131  cross each other is small, the touch panel  110  may be scanned via high resolution so that a fingerprint may be precisely recognized. Also, because the voltage of the driving signals applied to the transmitting lines  121  is high, the accuracy of the fingerprint recognition may be improved. 
       FIGS. 5A and 5B  are diagrams illustrating an example of an operation of the touch sensor  100  in a touch sensing mode, according to embodiments. Referring to  FIG. 5A , the transmitting driver  120  may simultaneously apply driving signals to all of the transmitting lines  121  indicated by thick solid lines in the first transmitting group  120   a  and may not apply driving signals to the transmitting lines  121  in the remaining transmitting groups  120   b ,  120   c ,  120   d , and  120   e , under control of the control circuit  140 . Next, referring to  FIG. 5B , the transmitting driver  120  may simultaneously apply driving signals to all of the transmitting lines  121  indicated by thick solid lines in the second transmitting group  120   b  and may not apply driving signals to the transmitting lines  121  in the remaining transmitting groups  120   a ,  120   c ,  120   d , and  120   e . Based on this method, the transmitting driver  120  may sequentially apply the driving signals to each of the transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e  from the first transmitting group  120   a  to the last transmitting group  120   e  under control of the control circuit  140 . In this case, as illustrated in “B” in  FIG. 5A , an area in which one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  crosses one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be a sensing unit. 
       FIG. 6  is a circuit diagram illustrating an example of an operation of the transmitting circuits (Touch-Finger TX)  122  disposed in the transmitting driver  120  in a touch sensing mode, according to embodiments.  FIG. 6  illustrates the transmitting circuits  122  disposed in one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  of the transmitting driver  120 . Referring to  FIG. 6 , in the operation illustrated in  FIG. 5A , all transmitting circuits  122  in the first transmitting group  120   a  may be simultaneously activated in response to a transmitting control signal TX_EN of the control circuit  140 . Then, the driving signals may be simultaneously applied to all transmitting lines  121  in the first transmitting group  120   a . Then, in the operation illustrated in  FIG. 5B , all transmitting circuits  122  in the second transmitting group  120   b  may be simultaneously activated in response to a transmitting control signal TX_EN of the control circuit  140 . Then, the driving signals may be simultaneously applied to all transmitting lines  121  in the second transmitting group  120   b.    
     Also, in the touch sensing mode, the control circuit  140  may connect the second voltage line VDDH_L providing a relatively low voltage, to the transmitting circuits  122 . Then, the transmitting circuits  122  that are activated may apply the low voltage received from the second voltage line VDDH_L to the transmitting lines  121  connected thereto, as the driving signals. Thus, the driving signals of the low voltage may be applied to the transmitting lines  121 . 
     In the touch sensing mode, an area of the sensing unit illustrated in “B” is large, and thus, mutual capacitance may be increased. For example, when one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  includes eight transmitting lines  121  and one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  includes eight receiving lines  131 , a mutual capacitance in the touch sensing mode may be approximately 64 times a mutual capacitance in the fingerprint recognition mode. Because of this aspect, an intensity of a touch signal may be greatly increased in the touch sensing mode to generate a great load to the signal output unit  130  processing the touch signal. Thus, to reduce the intensity of the touch signal in the touch sensing mode, the driving signals of the low voltage may be provided to the transmitting lines  121  by connecting the second voltage line VDDH_L to the transmitting circuits  122 . For example, a first voltage supplied by the first voltage line VDDH_H and a second voltage supplied by the second voltage line VDDH_L may be determined such that a change in mutual capacitance due to a touch operation in the fingerprint recognition mode is equal to a change in mutual capacitance due to a touch operation in the touch sensing mode (ΔC M =ΔV·C M ). 
     In the touch sensing mode, each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  of the signal output unit  130  may simultaneously receive the touch signal. In other words, one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may receive one touch signal. 
       FIG. 7  is a circuit diagram illustrating an example of an operation of the fingerprint recognition receiving circuits (Finger RX)  132  and the touch sensing receiving circuits (Touch RX)  133  disposed in the signal output unit  130  in a touch sensing mode, according to embodiments.  FIG. 7  illustrates the fingerprint recognition receiving circuits  132  and the touch sensing receiving circuits  133  disposed in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  in the signal output unit  130 . 
     Referring to  FIG. 7 , the signal output unit  130  may receive a touch signal by connecting the plurality of receiving lines  131  disposed in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  to one touch sensing receiving circuit  133 , in the touch sensing mode. To this end, the control circuit  140  may disconnect all of the fingerprint recognition receiving circuits  132  in the signal output unit  130  from the receiving lines  131  corresponding thereto, respectively, through a first receiving control signal RX_EN 1 . Also, the control circuit  140  may connect the touch sensing receiving circuits  133  to the receiving lines  131  corresponding thereto through a second receiving control signal RX_EN 2 . By doing so, one touch sensing receiving circuit  133  disposed in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may receive the touch signal from all of the receiving lines  131  disposed in the corresponding one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e . Based on this method, the touch signals generated in the nodes between one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  to which the driving signal is applied and the plurality of receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  crossing the transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  may be separately sensed. 
     As described above, the touch signal may be received through the fingerprint recognition receiving circuits  132  in the fingerprint recognition mode and the touch signal may be received through the touch sensing receiving circuits  133  in the touch sensing mode. The fingerprint recognition receiving circuits  132  and the touch sensing receiving circuits  133  may have the same structure, but may include capacitors having different capacitances from each other. 
       FIG. 8  is a circuit diagram illustrating a structure of the fingerprint recognition receiving circuits  132  and the touch sensing receiving circuits  133 , according to embodiments. Referring to  FIG. 8 , each of the fingerprint recognition receiving circuits  132  and the touch sensing receiving circuits  133  may include a feedback capacitor C F  connected to an input end and an output end of an amplifier. In  FIG. 8 , C M  is a mutual capacitance capacitor formed in nodes in which the transmitting lines  121  and the receiving lines  131  cross each other. As described above, because the mutual capacitance in the touch sensing mode and the mutual capacitance in the fingerprint recognition mode are different from each other, the capacitance of the feedback capacitor C F  of the fingerprint recognition receiving circuits  132  and the capacitance of the feedback capacitor C F  of the touch sensing receiving circuits  133  may be determined by taking this aspect into account. 
     When the fingerprint recognition receiving circuits  132  and the touch sensing receiving circuits  133  have the feedback capacitors C F  having the same capacitance, a ratio between a first voltage supplied through the first voltage line VDDH_H and a second voltage supplied through the second voltage line VDDH_L may be the same as a ratio between the mutual capacitance in the touch sensing mode and the mutual capacitance in the fingerprint recognition mode. For example, when one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  includes eight transmitting lines  121  and one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  includes eight receiving lines  131 , the first voltage may be approximately 64 times the second voltage. In this case, the first voltage may be excessively high. 
     The intensity of the touch signal is proportional to the change in the mutual capacitance and inversely proportional to the capacitance of the feedback capacitor C F  (that is, Vout∝ΔV·C M /C F ), and thus, a difference between the first voltage and the second voltage may be decreased by selecting the capacitance of the feedback capacitor C F  of the touch sensing receiving circuits  133  to be greater than the capacitance of the feedback capacitor C F  of the fingerprint recognition receiving circuits  132 . For example, when the capacitance of the feedback capacitor C F  of the touch sensing receiving circuits  133  is selected to be eight times the capacitance of the feedback capacitor C F  of the fingerprint recognition receiving circuits  132 , the first voltage may be eight times the second voltage. However, the numerical values described above are given for helping understand the disclosure. The number of transmitting lines  121  in one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e , the number of receiving lines  131  in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e , the ratio between the capacitance of the feedback capacitor C F  of the fingerprint recognition receiving circuits  132  and the capacitance of the feedback capacitor C F  of the touch sensing receiving circuits  133 , and the ratio between the first voltage and the second voltage may be variously selected according to a design of the touch sensor  100 . 
     As described in detail, the touch sensor  100  according to these embodiments may perform both the touch sensing and the fingerprint recognition. In the fingerprint recognition mode, the driving voltage may be increased to increase sensitivity, and in the touch sensing mode, the driving voltage may be decreased and all of the transmitting lines  121  and the receiving lines  131  may be used to improve the accuracy, precision, and linearity of the touch sensing operation. 
     When performing an operation of scrolling a screen or selecting a screen area in the touch sensing mode, low resolution may not cause inconvenience. However, when performing an operation of writing and inputting a letter or a number via a touch operation, it may be better to have high resolution. Thus, the touch sensing may be performed by dividing each of the transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e  and each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  into at least two, to increase the resolution of the touch sensing operation. Hereinafter, the touch sensing mode based on this group division will be referred to as a high resolution touch sensing mode and the touch sensing mode described with reference to  FIGS. 5A through 7  will be referred to as a low resolution touch sensing mode. 
       FIG. 9  is a diagram illustrating an example of an order in which a touch operation for each area of the touch panel  110  is sensed, in the high resolution touch sensing mode, according to embodiments. Referring to  FIG. 9 , the touch sensing operation may be performed by dividing each of the transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e  into two parts and dividing each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  into two parts. By doing so, the sensing unit illustrated in “B” in  FIG. 5A  is divided into four parts, and thus, the high resolution touch sensing mode may have four times the resolution of the low resolution touch sensing mode. In the high resolution touch sensing mode, the four divided areas may be scanned, for example, based on an order of the number illustrated in  FIG. 9 . 
       FIGS. 10, 11, 12A, 12B, 13 and 14  are diagrams illustrating an example of an operation of the touch sensor  100  in the high resolution touch sensing mode, according to embodiments. First, referring to  FIG. 10 , the transmitting driver  120  may simultaneously apply driving signals to a first portion of the transmitting lines  121  in the first transmitting group  120   a  and may not apply driving signals to the remaining transmitting lines  121 , under control of the control circuit  140 . For example, as indicated by a thick solid line in  FIG. 10 , the driving signals may be simultaneously applied to only the first portion of the transmitting lines  121  sequentially disposed in the first transmitting group  120   a.    
     Referring to  FIG. 11 , a first portion of the transmitting circuits Touch-Finger TX)  122  sequentially disposed in the first transmitting group  120   a  may be simultaneously activated in response to a transmitting control signal TX_EN of the control circuit  140 . Then, the driving signals may be simultaneously applied to the first portion of the transmitting lines  121  connected to the first portion of the activated transmitting circuits  122  in the first transmitting group  120   a . In this case, as illustrated in “C” in  FIG. 10 , an area in which a portion of each transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  and a portion of each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  cross each other may be a sensing unit. 
     The transmitting driver  120  may further include a third voltage line VDDH_M supplying a third voltage between the first voltage and the second voltage to the plurality of transmitting circuits  122 . In the high resolution touch sensing mode, the control circuit  140  may connect the third voltage line VDDH_M to the transmitting circuits  122 . Then, the activated transmitting circuits  122  may apply the third voltage received through the third voltage line VDDH_M to the transmitting lines  121  connected thereto, as the driving signals. Thus, the driving signals of the third voltage may be applied to the transmitting lines  121 . 
     An area of the sensing unit illustrated in “C” in the high resolution touch sensing mode is less than an area of the sensing unit illustrated in “B” in the low resolution touch sensing mode, and thus, as described above, the mutual capacitance of the sensing unit illustrated in “C” in the high resolution touch sensing mode may be correspondingly less than the mutual capacitance of the sensing unit illustrated in “B” in the low resolution touch sensing mode. For example, when each of the transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e  is divided into two parts and each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  is divided into two parts in the high resolution touch sensing mode, the mutual capacitance in the high resolution touch sensing mode may be ¼ times the mutual capacitance in the low resolution touch sensing mode. Thus, the third voltage may be higher than the second voltage to obtain a high SNR by maintaining the change in the mutual capacitance in the high resolution touch sensing mode to be the same as that in the low resolution touch sensing mode. Also, the third voltage may be lower than the first voltage supplied in the fingerprint recognition mode. For example, when each of the transmitting groups  120   a ,  120   b ,  120   c ,  120   d , and  120   e  is divided into two parts and each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  is divided into two parts, the third voltage may be four times the second voltage. However, the numerical values described above are only examples for helping understand the disclosure. Based on the number of parts into which each transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  is divided and the number of parts into which each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  is divided, the third voltage may be differently selected. 
     Also, according to a ratio between the capacitance of the feedback capacitor C F  of the fingerprint recognition receiving circuits  132  and the capacitance of the feedback capacitor C F  of the touch sensing receiving circuits  133  and a ratio between the mutual capacitance in the high resolution touch sensing mode and the mutual capacitance in the low resolution touch sensing mode, the first voltage and the third voltage may be the same. For example, when one transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  includes eight transmitting lines  121  and one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  includes eight receiving lines  131  and the capacitance of the feedback capacitor C F  of the touch sensing receiving circuits  133  is selected to be sixteen times the capacitance of the feedback capacitor C F  of the fingerprint recognition receiving circuits  132 , the first voltage may be four times the second voltage. Also, when each transmitting group  120   a ,  120   b ,  120   c ,  120   d , or  120   e  is divided into two parts and each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  is divided into two parts in the high resolution touch sensing mode, the third voltage may be four times the second voltage, to be the same as the first voltage. In this case, the transmitting driver  120  may not include the third voltage line VDDH_M and the control circuit  140  in the high resolution touch sensing mode may connect the first voltage line VDDH_H to the transmitting circuits  122 . 
     The signal output unit  130  may receive touch signals from a first portion of the receiving lines  131  sequentially disposed in each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e  and then may receive touch signals from the remaining receiving lines  131  sequentially disposed in each of the receiving groups  130   a ,  130   b ,  130   c ,  130   d , and  130   e , in the high resolution touch sensing mode. For example, the signal output unit  130  may simultaneously receive the touch signals from the receiving lines  131  corresponding to an area illustrated as “1” and then may simultaneously receive the touch signals from the receiving lines  131  corresponding to an area illustrated as “2” in  FIG. 9 . 
     Referring to  FIG. 12A , the signal output unit  130  may receive the touch signals by connecting the first portion of the receiving lines  131  sequentially disposed in each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  to one touch sensing receiving circuit (Touch RX)  133 , in the high resolution touch sensing mode. To this end, the control circuit  140  may disconnect all of the fingerprint recognition receiving circuits (Finger RX)  132  in the signal output unit  130  from the receiving lines  131  corresponding thereto, respectively, through a first receiving control signal RX_EN 1 . Also, the control circuit  140  may connect the receiving lines  131  corresponding to the area illustrated as “1” in  FIG. 9  in each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  to the touch sensing receiving circuit  133 , through a second receiving control signal RX_EN 2 . Then, one touch sensing receiving circuit  133  disposed in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may receive the touch signals from the first portion of the receiving lines  131  sequentially disposed in the corresponding one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e.    
     Thereafter, referring to  FIG. 12B , the signal output unit  130  may receive the touch signals by connecting a second portion of the receiving lines  131  sequentially disposed in each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  to one touch sensing receiving circuit (Touch RX)  133 . To this end, the control circuit  140  may disconnect the receiving lines  131  corresponding to the area illustrated as “1” in  FIG. 9  in each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  from the touch sensing receiving circuit  133  and may connect the receiving lines  131  corresponding to the area illustrated as “2” in  FIG. 9  to the touch sensing receiving circuit  133 , through a second receiving control signal RX_EN 2 . Then, one touch sensing receiving circuit  133  disposed in each receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may receive the touch signals from the second portion of the receiving lines  131  sequentially disposed in the corresponding receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e.    
     Next, referring to  FIG. 13 , the transmitting driver  120  may simultaneously apply driving signals to a second portion of the transmitting lines  121  in the first transmitting group  120   a  and may not apply driving signals to the remaining transmitting lines  121 , under control of the control circuit  140 . For example, as indicated by a thick solid line in  FIG. 13 , the driving signals may be simultaneously applied to only the second portion of the transmitting lines  121  sequentially disposed in the first transmitting group  120   a . To this end, referring to  FIG. 14 , a second portion of the transmitting circuits Touch-Finger TX)  122  sequentially disposed in the first transmitting group  120   a  may be simultaneously activated in response to a transmitting control signal TX_EN of the control circuit  140 . Then, the driving signals may be simultaneously applied to the second portion of the transmitting lines  121  connected to the second portion of the transmitting circuits  122  activated in the first transmitting group  120   a.    
     While the driving signals are simultaneously applied to the second portion of the transmitting lines  121  sequentially disposed in the first transmitting group  120   a , the signal output unit  130  may receive the touch signals based on the method described with reference to  FIGS. 12A and 12B . Based on this method, the high resolution touch sensing mode may be performed by separately applying the driving signals to portions of the transmitting lines  121  until the last transmitting group  120   e.    
     By using the method described in detail, the resolution of the touch sensing operation may be adjusted according to necessity, by variously selecting the groups of the transmitting lines  121  and the receiving lines  131  in the touch sensing mode. Also, the touch sensitivity and the SNR may be constantly maintained regardless of a change in the touch sensing resolution by appropriately changing the driving voltage according to the resolution of the touch sensing operation. 
     So far, it has been described that the touch signals are received through the fingerprint recognition receiving circuits  132  in the fingerprint recognition mode and the touch signals are received through the touch sensing receiving circuits  133  in the touch sensing mode. However, both in the fingerprint recognition mode and the touch sensing mode, one type of receiving circuit may be used to receive the touch signals. 
       FIG. 15  is a circuit diagram illustrating an example of a structure of a plurality of receiving circuits  132   a  through  132   h  disposed in the signal output unit  130 , according to embodiments.  FIG. 15  illustrates the receiving circuits disposed in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  of the signal output unit  130 . 
     Referring to  FIG. 15 , the signal output unit  130  may include the plurality of first through eighth receiving circuits  132   a  through  132   h  corresponding to a plurality of first through eighth receiving lines  131   a  through  131   h , respectively. The first through eighth receiving circuits  132   a  through  132   h  may be connected to the first through eighth receiving lines  131   a  through  131   h  corresponding thereto, respectively, in response to a first receiving control signal RX_EN 1  of the control circuit  140 . Also, the second through eighth receiving lines  131   b  through  131   h  may be selectively connected to the first receiving line  131   a  and the sixth through eighth receiving lines  131   f  through  131   h  may be selectively connected to the fifth receiving line  131   e , in response to a second receiving control signal RX_EN 2  of the control circuit  140 . The control circuit  140  may control connection between the first through eighth receiving lines  131   a  through  131   h  and the first through eighth receiving circuits  132   a  through  132   h , and connection between the first through eighth receiving lines  131   a  through  131   h  according to a fingerprint recognition mode, a low resolution touch sensing mode, and a high resolution touch sensing mode, by using the first receiving control signal RX_EN 1  and the second receiving control signal RX_EN 2 . 
       FIGS. 16, 17 and 18  are circuit diagrams illustrating an example of an operation of the first through eighth receiving circuits  132   a  through  132   h  disposed in the signal output unit  130 , according to embodiments. First, referring to  FIG. 16 , in the fingerprint recognition mode, the control circuit  140  may connect the first through eighth receiving circuits  132   a  through  132   h  to the first through eighth receiving lines  131   a  through  131   h  corresponding thereto, respectively, by using the first receiving control signal RX_EN 1 . Also, the control circuit  140  may disconnect the connection between all of the first through eighth receiving lines  131   a  through  131   h  by using the second receiving control signal RX_EN 2 . Then, the first through eighth receiving circuits  132   a  through  132   h  may simultaneously receive touch signals through the first through eighth receiving lines  131   a  through  131   h  corresponding thereto, respectively. 
     Also, referring to  FIG. 17 , in the low resolution touch sensing mode, the control circuit  140  may connect only the first receiving circuit  132   a  to the first receiving line  131   a  and may disconnect the second through eighth receiving circuits  132   b  through  132   h  from the second through eighth receiving lines  131   b  through  131   h , respectively, by using the first receiving control signal RX_EN 1 . Also, the control circuit  140  may connect all of the second through eighth receiving lines  131   b  through  131   h  to the first receiving line  131   a  by using the second receiving control signal RX_EN 2 . Then, the first receiving circuit  132   a  connected to the first receiving line  131   a  may simultaneously receive the touch signals from the first through eighth receiving lines  131   a  through  131   h . Thus, in the low resolution touch sensing mode, the touch signals generated in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be received through the first receiving circuit  132   a.    
     Referring to  FIG. 18 , in the high resolution touch sensing mode, the control circuit  140  may connect the first receiving circuit  132   a  to the first receiving line  131   a  and connect the fifth receiving circuit  132   e  to the fifth receiving line  131   e  by using the first receiving control signal RX_EN 1 . Then, the control circuit  140  may disconnect the second through fourth and the sixth through eighth receiving circuits  132   b  through  132   d  and  132   f  through  132   h  from the second through fourth and the sixth through eighth receiving lines  131   b  through  131   d  and  131   f  through  131   h , respectively. Also, the control circuit  140  may disconnect the sixth through eighth receiving lines  131   f  through  131   h  from the first receiving line  131   a , connect the second through fourth receiving lines  131   b  through  131   d  to the first receiving line  131   a , and connect the sixth through eighth receiving lines  131   f  through  131   h  to the fifth receiving line  131   e , by using the second receiving control signal RX_EN 2 . 
     Then, the first receiving circuit  132   a  connected to the first receiving line  131   a  may simultaneously receive the touch signals from the first through fourth receiving lines  131   a  through  131   d  sequentially disposed and the fifth receiving circuit  132   e  connected to the fifth receiving line  131   e  may simultaneously receive the touch signals from the fifth through eighth receiving lines  131   e  through  131   h  sequentially disposed. Thus, in the high resolution touch sensing mode, the touch signals generated in a first portion of one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be received by the first receiving circuit  132   a  and the touch signals generated in a second portion of the corresponding receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be received by the fifth receiving circuit  132   e.    
     According to these embodiments, the first receiving circuit  132   a  and the fifth receiving circuit  132   e  may simultaneously receive the touch signals generated in different areas in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e . Thus, an operational speed of the high resolution touch sensing mode may be improved. In the embodiments described with reference to  FIGS. 9 through 14 , the high resolution touch sensing mode having four times the resolution of the low resolution touch sensing mode may take four times the time taken by the low resolution touch sensing mode. However, in the embodiments described with reference to  FIGS. 15 through 18 , the high resolution touch sensing mode having four times the resolution of the low resolution touch sensing time may take only two times the time taken by the low resolution touch sensing mode. 
     In the embodiments described with reference to  FIGS. 15 through 18 , the capacitance of the feedback capacitor C F  in the fingerprint recognition mode may be the same as the capacitance of the feedback capacitor C F  in the touch sensing mode. Thus, the ratio between the first voltage supplied by the first voltage line VDDH_H and the second voltage supplied by the second voltage line VDDH_L may be the same as the ratio between the mutual capacitance in the touch sensing mode and the mutual capacitance in the fingerprint recognition mode. 
       FIG. 19  is a circuit diagram illustrating an example of a structure of a plurality of receiving circuits  132 ,  133   a  and  133   b  disposed in the signal output unit  130 , according to embodiments.  FIG. 19  illustrates the plurality of receiving circuits  132 ,  133   a , and  133   b  disposed in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  of the signal output unit  130 . Referring to  FIG. 19 , the signal output unit  130  may include the plurality of fingerprint recognition receiving circuits (Finger RX)  132  corresponding to the plurality of first through eighth receiving lines  131   a  through  131   h , respectively, and the first and second touch sensing receiving circuits (Touch RX)  133   a  and  133   b . Thus, compared to the embodiments illustrated in  FIG. 4 , the signal output unit  130  illustrated in  FIG. 19  may further include one more touch sensing receiving circuit. 
     The fingerprint recognition receiving circuits  132  may be connected to the first through eighth receiving lines  131   a  through  131   h  corresponding thereto, respectively, in response to the first receiving control signal RX_EN 1  of the control circuit  140 . The first touch sensing receiving circuit  133   a  may be selectively connected to the first through eighth receiving lines  131   a  through  131   h  or to the fifth through eighth receiving lines  131   e  through  131   h , in response to the second receiving control signal RX_EN 2  of the control circuit  140 . The second touch sensing receiving circuit  133   b  may be selectively connected to the first through fourth receiving lines  131   a  through  131   d  in response to the second receiving control signal RX_EN 2  of the control circuit  140 . The control circuit  140  may connect the first through eighth receiving lines  131   a  through  131   h  to the fingerprint recognition receiving circuits  132 , the first touch sensing receiving circuit  133   a , or the second touch sensing receiving circuit  133   b , according to the fingerprint recognition mode, the low resolution touch sensing mode, or the high resolution touch sensing mode, by using the first receiving control signal RX_EN 1  and the second receiving control signal RX_EN 2 . 
     For example, in the fingerprint recognition mode, the control circuit  140  may connect the fingerprint recognition receiving circuits  132  to the first through eighth receiving lines  131   a  through  131   h  corresponding thereto, respectively, by using the first receiving control signal RX_EN 1 . Also, the control circuit  140  may disconnect all of the first through eighth receiving lines  131   a  through  131   h  from the first touch sensing receiving circuit  133   a  and disconnect all of the fifth through eighth receiving lines  131   e  through  131   h  and the second touch sensing receiving circuit  133   b , by using the second receiving control signal RX_EN 2 . 
       FIGS. 20 and 21  are circuit diagrams illustrating an example of an operation of the plurality of receiving circuits  132 ,  133   a  and  133   b  disposed in the signal output unit  130 , according to embodiments. 
     Referring to  FIG. 20 , in the low resolution touch sensing mode, the control circuit  140  may disconnect all of the first through eighth receiving lines  131   a  through  131   h  from the fingerprint recognition receiving circuits (Finger RX)  132  corresponding thereto, respectively, by using the first receiving control signal RX_EN 1 . Also, the control circuit  140  may connect all of the first through eighth receiving lines  131   a  through  131   h  to the first touch sensing receiving circuit (Touch RX)  133   a  and disconnect the fifth through eighth receiving lines  131   e  through  131   h  from the second touch sensing receiving circuit  133   b , by using the second receiving control signal RX_EN 2 . Then, the first touch sensing receiving circuits  133   a  may simultaneously receive the touch signals from the first through eighth receiving lines  131   a  through  131   h . Thus, in the low resolution touch sensing mode, the touch signals generated in one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be received by the first touch sensing receiving circuit  133   a.    
     Referring to  FIG. 21 , in the high resolution touch sensing mode, the control circuit  140  may disconnect all of the first through eighth receiving lines  131   a  through  131   h  from the fingerprint recognition receiving circuits (Finger RX)  132  corresponding thereto, respectively, by using the first receiving control signal RX_EN 1 . Also, the control circuit  140  may connect only the fifth through eighth receiving lines  131   e  through  131   h  sequentially disposed to the first touch sensing receiving circuit (Touch RX)  133   a  and disconnect the first through fourth receiving lines  131   a  through  131   d  from the first touch sensing receiving circuit  133   a , by using the second receiving control signal RX_EN 2 . Also, the control circuit  140  may connect the first through fourth receiving lines  131   a  through  131   d  sequentially disposed to the second touch sensing receiving circuit  133   b . Then, the first touch sensing receiving circuit  133   a  may simultaneously receive the touch signals from the fifth through eighth receiving lines  131   e  through  131   h  and the second touch sensing receiving circuit  133   b  may simultaneously receive the touch signals from the first through fourth receiving lines  131   a  through  131   d.    
     In the embodiments illustrated in  FIGS. 19 through 21 , in the high resolution touch sensing mode, the touch signals generated in a first portion of one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be received by the first touch sensing receiving circuit  133   a . Simultaneously, the touch signals generated in a second portion of one receiving group  130   a ,  130   b ,  130   c ,  130   d , or  130   e  may be received by the second touch sensing receiving circuit  133   b . Thus, according to these embodiments, the high resolution touch sensing mode having four times the resolution of the low resolution touch sensing time may take only two times the time taken by the low resolution touch sensing mode. 
     Also, in the embodiments described with reference to  FIGS. 19 through 21 , the capacitance of the feedback capacitor C F  in the fingerprint recognition mode and the capacitance of the feedback capacitor C F  of the touch sensing mode may be different from each other. Thus, the ratio between the first voltage supplied by the first voltage line VDDH_H and the second voltage supplied by the second voltage line VDDH_L may be determined by taking into account the capacitance of the feedback capacitor C F  of the fingerprint recognition receiving circuits  132  and the capacitance of the feedback capacitor C F  of the first and second touch sensing receiving circuits  133   a  and  133   b.    
     The touch sensor  100  described in detail may be applied to various electronic apparatuses, such as smart phones, smart watches, tablet PCs, laptop computers, televisions (TVs), personal digital assistants (PDAs), portable multimedia players (PMP), etc. 
       FIG. 22  is a block diagram illustrating an example of a structure of an electronic apparatus  1000  including the touch sensor  100 , according to embodiments. Referring to  FIG. 22 , the electronic apparatus  1000  may include, for example, a central processing unit  1110 , a mobile communicator  1111 , a short-range wireless communicator  1112 , a broadcasting receiver  1113 , a camera portion  1114 , a sensor portion  1115 , a global positioning system (GPS) receiver  1116 , an input and output portion  1120 , a power supply  1130 , a memory  1140 , etc. Here, the “portion” may be a hardware component and/or a software component executed by the hardware component. 
     The mobile communicator  1111  may transceive wireless signals with any one or any combination of a base station, an external terminal, and a server in a mobile communication network. Here, the wireless signals may include a sound call signal, a video telephony call signal, or various forms of data according to transmittance and reception of text/multimedia messages. The short-range wireless communicator  1112  may perform functions for short-range wireless communication. The short-range wireless communicator  1112  may include a Bluetooth communicator, a Bluetooth low energy (BLE) communicator, a near field communicator, A WLAN (Wi-Fi) communicator, a Zigbee communicator, an infrared data association (IrDA) communicator, a Wi-Fi direct (WFD) communicator, an ultra wideband (UWB) communicator, an Ant+ communicator, etc., but is not limited thereto. 
     The broadcasting receiver  1113  may receive DMB broadcasting signals. The camera portion  1114  may include lenses and optical devices configured to capture a picture or a video. The sensor portion  1115  may include, for example, a gravity sensor configured to sense motions of the electronic apparatus  1000 , an illuminance sensor configured to sense brightness of light, a proximity sensor configured to sense proximity of a human being, a motion sensor configured to sense motion of a human being, etc. The GPS receiver  1116  may receive GPS signals from artificial satellites. By using these GPS signals, various services may be provided to a user. 
     Also, the input and output portion  1120  may provide an interface with respect to an external device or a user, and may include a button  1121 , a microphone  1122 , a speaker  1123 , a vibration motor  1124 , a connector  1125 , a display panel  1126 , etc. The power supply  1130  may be connected to a battery or an external power source to supply power to the electronic apparatus  1000 . 
     The memory  1140  may store various programs executed by the central processing unit  1110 . The central processing unit  1110  may control programs stored in the memory  1140  or operations of the other components described in detail. The programs stored in the memory  1140  may be divided into a plurality of modules according to functions thereof. For example, the modules may include a mobile communication module  1141 , a Wi-Fi module  1142 , a Bluetooth module  1143 , a DMB module  1144 , a camera module  1145 , a sensor module  1146 , a GPS module  1147 , a video reproducing module  1148 , an audio reproducing module  1149 , a power module  1150 , a user interface (UI) module  1151 , a fingerprint recognition module  1152 , etc. 
     The electronic apparatus  1000  may further include the touch sensor  100  and a touch screen controller  1161 . The touch sensor  100  may be disposed above a display panel  1126  or may be integrally manufactured with the display panel  1126 . The touch screen controller  1161  may control operations of the transmitting driver  120  and the signal output unit  130  of the touch sensor  100  in interconnection with the control circuit  140  of the touch sensor  100 . The touch screen controller  1161  may be integrally formed with the control circuit  140  of the touch sensor  100  in the electronic apparatus  1000  or may be software installed in the electronic apparatus  1000 . 
     In a state in which it is pre-set that a user is to perform user authentication via fingerprinting recognition, when the electronic apparatus  1000  requires user authentication, the touch screen controller  1161  may convert the operation of the touch sensor  100  into a fingerprint recognition mode. For example, when user authentication is required to cancel a screen lock state of the electronic apparatus  1000 , the fingerprint recognition mode may be started. Alternatively, the fingerprint recognition mode may be started also when user authentication is required to perform on-line banking, online payment, etc. using the electronic apparatus  1000 . When the fingerprint recognition mode is started, the central processing unit  1110  may execute, for example, the fingerprint recognition module  1152 , and the fingerprint recognition module  1152  may control the transmitting driver  120  and the signal output unit  130  via the touch screen controller  1161 . Thus, the electronic apparatus  1000  may perform the fingerprint recognition for user authentication only by a user&#39;s fingerprint contact on the display panel  1126 . Thus, because it is not required to mount an additional fingerprint sensor, a space for the fingerprint sensor may be spared. 
     When a touch operation is performed, such as selecting a screen area on the display panel  1126  or scrolling a screen, the touch screen controller  1161  may convert the operation of the touch sensor  100  into a low resolution touch sensing mode. Also, when a user executes a writing and inputting program through which the user may write and input letters or numbers by a touch operation, the touch screen controller  1161  may convert the operation of the touch sensor  100  into a high resolution touch sensing mode. 
     The fingerprint recognition touch sensor and the electronic apparatus including the same described in detail are described with reference to the embodiments illustrated in the drawings. However, the embodiments are only examples and it would be understood by one of ordinary skill in the art that various modifications and equivalent embodiments are possible based on the embodiments. Therefore, the disclosed embodiments have to be understood in a descriptive sense rather than a limiting sense. The scope of the disclosure is described in the claims rather than the descriptions above, and all differences within the range corresponding thereto shall be interpreted as being included in the claims.