Patent Publication Number: US-2018032173-A1

Title: Display module capable of detecting location using electromagnetic induction and capacitance methods, and display device having same

Description:
TECHNICAL FIELD 
     The present invention relates to a display module capable of detection a location using an electromagnetic induction method and a display device including the same, and more particularly, to a display module capable of detection a location using capacitance and electromagnetic induction methods capable of detecting a touch location due to a touch operation and a location of an electronic pen due to electromagnetic induction, and a display device including the same. 
     BACKGROUND ART 
     A touch panel is widely used as an input device in a display device including a mobile communication terminal, a PDA, a tablet PC, and the like. 
     In a display device in the related art, the touch panel is used to be separately configured on or below a display device including an organic light emitting diode (OLED), a liquid crystal display (LCD), an active matrix organic light emitting diode (AMOLED), a field emission display (FED), and the like. 
     Meanwhile, recently, input devices capable of detecting both a touch by the finger and a touch by the electronic pen, particularly, both an input using a capacitance method and an input using an electromagnetic induction method for detecting the location of the electronic pen emitting an induced electromagnetic field have been developed. 
     The capacitance method is a method in which a transparent electrode pattern is formed on a capacitive touch sensor substrate with a transparent conductive material such as indium tin oxide (ITO), metal mesh, Ag nano wire or CNT, and a flexible circuit board connected to the outside is electrically connected to the transparent electrode pattern. 
     In addition, the input using the electromagnetic induction method may be variously provided, for example, when a battery is built in the electronic pen or when the battery is not built in. 
     When the battery is not built in the electronic pen, a resonance circuit connected to a capacitor and a coil provided in the electronic pen is resonated by a resonance circuit connected to a capacitor and a coil provided in the input device to transmit energy. 
     In addition, the input device senses the energy transmitted from the electronic pen to detect the location of the electronic pen. 
     However, in a conventional display device, a touch panel for detecting a touch location due to a touch operation of a finger separately configured from a display device and a digitizer panel for detecting a location of the electronic pen emitting an induced electromagnetic field are combined. 
     As a result, the conventional display device has a problem in that the thickness thereof is relatively increased. In addition, since the touch panel for detecting the touch location due to the touch operation of the finger separately configured from the display device and the digitizer panel for detecting the location of the electronic pen emitting the induced electromagnetic field need to be separately manufactured and combined to each other, there is a problem in that the efficiency of the operation is reduced in manufacturing the display device. 
     Therefore, studies for integrating a coordinate input sensor capable of simultaneously detecting the touch location due to the touch operation and the location of the electronic pen in the display device are required. 
     DISCLOSURE 
     Technical Problem 
     The present invention has been made in an effort to provides a display module capable of detecting a locating using capacitance and electromagnetic induction methods and a display device including the same, in which a location detecting unit that detects a touch location from a capacitance change due to a touch operation and a location of an electronic pen from a change in an electromagnetic field due to electromagnetic induction is integrated in the display device. 
     Technical Solution 
     An aspect of the present invention provides a display module capable of detecting a location using capacitance and electromagnetic induction methods, the display module comprising: a display device; and a location detecting unit which is integrally provided in the display device and detects a touch location from a change in capacitance due to a touch operation and detects a location of an electronic pen from a change in inductive electromagnetic field due to electromagnetic induction. 
     The location detecting unit may include a base loop that surrounds at least a part of a sensing area; a plurality of first conductive patterns which is elongated in a first direction in the sensing area and parallel to each other in a second direction crossing the first direction; a plurality of second conductive patterns which are elongated in the second direction in the sensing area and parallel to each other in the first direction to detect a touch location from a capacitance change due to a touch operation by making pairs with the first conductive patterns; and a plurality of third conductive patterns which are elongated in the second direction in the sensing area, connected to the base loop, and parallel to each other in the first direction to detect a location of the electronic pen from the change in the induced electromagnetic field generated as the electronic pen emitting electromagnetic force is approached by making pairs with the first conductive patterns. 
     The second conductive patterns and the third conductive patterns may be formed on one surface of the substrate disposed in the display device in parallel in the first direction, the first conductive patterns may be formed on one surface of the substrate in parallel in the second direction and cross the second conductive patterns and the third conductive patterns, and the first conductive patterns may be formed on one surface of the substrate by connecting a plurality of unit conductive patterns formed in the first direction between the second conductive patterns and the third conductive patterns by a bridge, or the second conductive patterns and the third conductive patterns are formed on one surface of the substrate by connecting a plurality of unit conductive patterns formed between the first conductive patterns in the second direction by a bridge. 
     The second conductive patterns and the third conductive patterns may be formed on one surface of the substrate disposed in the display device in parallel in the first direction, and the first conductive patterns may be formed on the other surface of the substrate in parallel in the second direction. 
     The first conductive patterns, the second conductive patterns, the third conductive patterns, and the base loop may be formed on one surface or the other surface of at least one of a backlight unit a bottom polarizer, a TFT glass substrate, a filter glass substrate, a top polarizer, and a cover glass configuring a liquid crystal display (LCD) device or formed on one surface or the other surface of at least one of a TFT glass substrate, a polarizer, and a cover glass configuring an organic light emitting diodes (OLED) device. 
     The display module may further include a capacitance controller which connects one ends of the first conductive patterns to the other ends or opens the other ends of the first conductive patterns and applies a signal to at least one of one ends and the other ends of the first conductive patterns to detect the signal shown in the second conductive patterns, or connects one ends of the second conductive patterns to the other ends or opens the other ends of the second conductive patterns and applies a signal to at least one of one ends and the other ends of the second conductive patterns to detect the signal shown in the first conductive patterns, while the first conductive patterns and the second conductive patterns are disconnected from the base loop; and an electromagnetic induction controller which detects a transmission location of an induced electromagnetic field in the second direction based on a signal output from one ends of the first conductive patterns and detects a transmission location of an induced electromagnetic field in the first direction based on a signal output from one ends of the third conductive patterns, while the first conductive patterns and the third conductive patterns are connected with the base loop, in which in the case of detecting the transmission location of the induced electromagnetic field, one ends of the first conductive patterns and the third conductive patterns may be connected to the electromagnetic induction controller and the other ends thereof are connected to the base loop. 
     The electromagnetic induction controller may detect a location of the electronic pen in the second direction based on the signal output from one ends of at least two first conductive patterns and detect the location of the electronic pen in the first direction based on the signal output from one ends of at least two third conductive patterns. 
     The location detecting unit may include a base loop that surrounds at least a part of a sensing area; a plurality of first conductive patterns which is elongated in a first direction in the sensing area and parallel to each other in a second direction crossing the first direction; and a plurality of second conductive patterns which is elongated in a second direction in the sensing area and parallel to each other in the first direction, in which the first conductive patterns and the second conductive patterns may make pairs to detect a touch location from a capacitance change due to a touch operation while the first conductive patterns and the second conductive patterns are disconnected from the base loop, and the first conductive patterns and the second conductive patterns may make pairs to detect the location of the electronic pen from a change in an induced electromagnetic field generated as the electronic pen emitting electromagnetic force is approached, while the first conductive patterns and the second conductive patterns are connected with the base loop. 
     The second conductive patterns may be formed on one surface of the substrate disposed in the display device in parallel in the first direction, the first conductive patterns may be formed on one surface of the substrate in parallel in the second direction and cross the second conductive patterns, and the first conductive patterns may be formed on one surface of the substrate by connecting a plurality of unit conductive patterns formed in the first direction between the second conductive patterns by a bridge, or the second conductive patterns may be formed on one surface of the substrate by connecting a plurality of unit conductive patterns formed between the first conductive patterns in the second direction by a bridge, so that the first conductive patterns and the second conductive patterns are insulated from each other. 
     The second conductive patterns may be formed on the one surface of the substrate configuring the upper surface of the display device in parallel in the first direction, and the first conductive patterns may be formed on the other surface of the substrate in parallel in the second direction. 
     The first conductive patterns, the second conductive patterns, and the base loop may be formed on one surface or the other surface of at least one of a backlight unit a bottom polarizer, a TFT glass substrate, a filter glass substrate, a top polarizer, and a cover glass configuring a liquid crystal display (LCD) device or formed on one surface or the other surface of at least one of a TFT glass substrate, a polarizer, and a cover glass configuring an organic light emitting diodes (OLED) device. 
     The display module may further include a capacitance controller which connects one ends of the first conductive patterns to the other ends or opens the other ends of the first conductive patterns and applies a signal to at least one of one ends and the other ends of the first conductive patterns to detect the signal shown in the second conductive patterns, or connects one ends of the second conductive patterns to the other ends or opens the other ends of the second conductive patterns and applies a signal to at least one of one ends and the other ends of the second conductive patterns to detect the signal shown in the first conductive patterns, while the first conductive patterns and the second conductive patterns are disconnected from the base loop; and an electromagnetic induction controller which detects a transmission location of an induced electromagnetic field in the second direction based on a signal output from one ends of the first conductive patterns and detects a transmission location of an induced electromagnetic field in the first direction based on a signal output from one ends of the second conductive patterns, while the first conductive patterns and the second conductive patterns are connected with the base loop, in which in the case of detecting the transmission location of the induced electromagnetic field, one ends of the first conductive patterns and the second conductive patterns may be connected to the electromagnetic induction controller and the other ends thereof may be connected to the base loop. 
     The electromagnetic induction controller may detect a location of the electronic pen in the second direction based on the signal output from one ends of at least two first conductive patterns and detect the location of the electronic pen in the first direction based on the signal output from one ends of at least two second conductive patterns. 
     The display module may further include an energy supply unit which is integrally provided in the display device and supplies energy to the electronic pen by applying a frequency corresponding to a resonance frequency having a resonance circuit of the electronic pen. 
     The base loop may be disposed at one edge or the other edge of the substrate disposed in the display device to surround at least a part of the sensing area. 
     Another aspect of the present invention provides a display device including: a case frame; and a display module which is embedded in the case frame, visually displays an image, and detects a touch location from a capacitance change due to a touch operation and a location of an electronic pen from a change in an induced electromagnetic field due to electromagnetic induction. 
     Advantageous Effects 
     According to the embodiments of the present invention, the location detecting unit that detects the touch location from the capacitance change due to the touch operation and the location of the electronic pen from the change in the electromagnetic field due to the electromagnetic induction is integrated in the display device, thereby detecting the touch location due to the touch operation and the location of the electronic pen while the display module displays the image and minimizing the thickness of the display module. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is an exploded perspective view illustrating a display device according to a first embodiment of the present invention. 
         FIGS. 2A and 2B  are schematic views for describing detecting a touch location using a capacitance method. 
         FIG. 3  is a schematic view for describing detecting a location of an electronic pen using an electromagnetic induction method. 
         FIGS. 4A and 4B  are schematic views for describing detecting a location of an electronic pen using an electromagnetic induction method according to an embodiment when a plurality of line antennas is provided. 
         FIGS. 5A and 5B  are schematic views for describing detecting a location of an electronic pen using an electromagnetic induction method according to another embodiment when a plurality of line antennas is provided. 
         FIGS. 6 and 7  are plan views illustrating a structure of a location detecting unit according to a first embodiment of the present invention. 
         FIG. 8  is a cross-sectional view illustrating a display module in which the location detecting unit is integrally provided in an LCD according to the first embodiment of the present invention. 
         FIGS. 9 and 10  are cross-sectional views illustrating the location detecting unit which is formed on a filter glass substrate of the LCD according to the first embodiment of the present invention, as cross-sectional views taken along line A-A. 
         FIG. 11  is a cross-sectional view illustrating a display module in which the location detecting unit is integrally provided in an OLED according to the first embodiment of the present invention. 
         FIGS. 12 and 13  are plan views illustrating a structure of a location detecting unit according to a second embodiment of the present invention. 
         FIGS. 14 and 15  are cross-sectional views illustrating the location detecting unit which is formed on a filter glass substrate of the LCD according to the first embodiment of the present invention, as cross-sectional views taken along line B-B. 
     
    
    
     MODES OF THE INVENTION 
     In order to fully understand the present invention, operational advantages of the present invention and objects achieved by implementing the present invention, the prevent invention will be described with reference to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents illustrated in the accompanying drawings. 
     Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals illustrated in the respective drawings designate like members. 
     First, a display device according to a first embodiment of the present invention will be described as follows. 
       FIG. 1  is an exploded perspective view illustrating a display device according to a first embodiment of the present invention,  FIGS. 2A and 2B  are schematic views for describing detecting a touch location using a capacitance method,  FIG. 3  is a schematic view for describing detecting a location of an electronic pen using an electromagnetic induction method,  FIGS. 4A and 4B  are schematic views for describing detecting a location of an electronic pen using an electromagnetic induction method according to an embodiment when a plurality of line antennas is provided,  FIGS. 5A and 5B  are schematic views for describing detecting a location of an electronic pen using an electromagnetic induction method according to another embodiment when a plurality of line antennas is provided,  FIGS. 6 and 7  are plan views illustrating a structure of a location detecting unit according to a first embodiment of the present invention,  FIG. 8  is a cross-sectional view illustrating a display module in which the location detecting unit is integrally provided in an LCD according to the first embodiment of the present invention,  FIGS. 9 and 10  are cross-sectional views illustrating the location detecting unit which is formed on a filter glass substrate of the LCD according to the first embodiment of the present invention, as cross-sectional views taken along line A-A, and  FIG. 11  is a cross-sectional view illustrating a display module in which the location detecting unit is integrally provided in an OLED according to the first embodiment of the present invention. 
     Referring to  FIG. 1 , a display device according to a first embodiment of the present invention includes a case frame  100 , an image display unit  100  which is embedded in the case frame  100  to detect a touch location due to a touch operation and a location of an electronic pen while displaying an image, and a window glass  300  disposed on a front surface of the case frame  100 . 
     In addition, the display module  200  and the window glass  300  are sequentially stacked to be coupled to the case frame  100 . 
     The display module  200  according to the embodiment includes a display device  210  that visually displays an image, and a location detecting unit  250  which is integrally provided in the display device  210  and detects a touch location from a change in capacitance due to a touch operation and detects a location of an electronic pen from a change in inductive electromagnetic field due to electromagnetic induction. 
     That is, in the display module  200  according to the embodiment, the location detecting unit  250  is integrally provided in the display device  210  to form one unit module. 
     In the embodiment, the display device  210  serves to display the image to a user and may be various display devices including an organic light emitting diode (OLED), a liquid crystal display (LCD), an active matrix organic light emitting diode (AMOLED), a field emission display (FED), and the like. In addition, in the embodiment, the display device  210  includes both flat and curved types. 
     Since the display module  200  according to the embodiment includes the location detecting unit  250  that detects the touch location using a capacitance method and the location of the electronic pen using an electromagnetic induction method, before describing the display module  200  according to the embodiment, a method of detecting the touch location using a capacitance method and the location of the electronic pen using an electromagnetic induction method will be described schematically. 
     First, referring to  FIGS. 2A and 2B , a method of detecting the touch location using a capacitance method will be described below. 
     A signal input pattern Tx provided to input a signal to the display module  200  is arranged and a signal sensing pattern Rx may be arranged in a direction crossing the signal input pattern Tx. 
     Referring to  FIG. 2A , the signal input pattern Tx and the signal sensing pattern Rx are closely disposed, cross each other and are electrically insulated from each other. 
     In addition, when a pulse signal  50  by an AC voltage is input to the signal input pattern Tx, a predetermined range of charges is accumulated in the signal sensing pattern Rx which is disposed close to the signal input pattern Tx (see X of  FIG. 2B ). 
     At this time, when a finger or the like approaches the signal sensing pattern Rx, an amount of charges accumulated in the signal sensing pattern Rx is changed by the finger or the like (see Y in  FIG. 2B ) and a location of the finger may be detected by sensing a change in charge amount. 
     In addition, a method of detecting a location of an electronic pen using an electromagnetic induction method will be described below with reference to  FIGS. 3 to 5B . Referring to  FIG. 3 , when a line antenna  20  is connected to a closed loop  50  and the electronic pen  60  approaches the line antenna  20  side, an inductive voltage is generated in the line antenna  20  by the electronic pen  60 . 
     In this case, a resonant circuit connected to a coil L 2  and a capacitor C 2  is provided in the electronic pen  60 , and although not illustrated, a coil L 1  and a capacitor C 1  are connected to a power coil (not illustrated) that is provided separately outside the closed loop  50  to supply energy to the electronic pen  60 . 
     Accordingly, when the electronic pen  60  approaches a location close to the line antenna  20 , LC resonance (L 1 *C 1 =L 2 *C 2 ) is generated and energy is transmitted from the electronic pen  60  to the line antenna  20  to generate an inductive voltage. 
     In addition, as illustrated in  FIG. 3 , induction currents i 1  and i 2  flow along the line antenna  20  by the inductive voltage, and herein, when the electronic pen  60  is located at the center of the line antenna  20 , the induced current i 1  and the induced current i 2  flowing through the closed loop  50  are the same in magnitude. 
     In addition, when the electronic pen  60  is located at the left side of the line antenna  20 , the induced current i 1  has a value larger than the induced current i 2 , and when the electronic pen  60  is located at the right side of the line antenna  20 , the current i 2  has a value larger than the induced current i 1 . 
       FIGS. 4A and 4B  are a view for describing the location detection of the electronic pen using the electromagnetic induction method according to the embodiment, and illustrates changes in magnitude and phase of the voltage output from a plurality of line antennas  20  when the plurality of line antennas  20  is provided. 
     Herein,  FIG. 4A  illustrates the arrangement of the plurality of line antennas  20 , a switch  10 , and a differential amplifier  30  and  FIG. 4B  illustrates magnitudes and phases of the voltage output from the plurality of line antennas  20 . 
     Referring to  FIG. 4A , assuming that the electronic pen  60  is located on the relatively right side from the center, when the switch  10  is in the first location, as illustrated in  FIG. 4B , the switch  10  has a relatively low voltage value, but as the switch  10  moves to the right side, that is, the switch  10  moves from the first location to the fourth location, the voltage value increases in a positive (+) direction and then decreases again and has a value of O|V| at a point  40  where the electromagnetic pen  60  is located, and increases in a negative (−) direction in the switch  10  at the fourth location which is located at the right side from the point  40  where the electromagnetic pen  60  is located. 
     That is, when the plurality of line antennas  20  is disposed and the plurality of line antennas  20  are sequentially scanned through the switch  10 , the magnitude and the phase of the voltage is changed according to the location of the electronic pen  60 . In this case, the location of the electronic pen  60  corresponds to the point where the voltage value is 0|V|. 
       FIGS. 5A and 5B  are a view for describing the location detection of the electronic pen using the electromagnetic induction method according to another embodiment, and illustrates changes in magnitude and phase of the voltage output from two adjacent line antennas  20  among the plurality of line antennas  20  when the plurality of line antennas  20  is provided. 
     Herein,  FIG. 5A  illustrates the arrangement of the plurality of line antennas  20 , the first and second switches  11  and  15 , and the first to third differential amplifiers  31 ,  33  and  35  and  FIG. 5B  illustrates differences of magnitudes and phases of the voltages output from the two adjacent line antennas  20  among the plurality of line antennas  20 . 
     For example,  FIG. 5B  illustrates a value obtained by subtracting the magnitude and the phase of the voltage from the second differential amplifier  33  when the second switch  15  is at the second location from the magnitude and the phase of the voltage output from the first differential amplifier  31  when the first switch  11  is at the first location, as a value output from the third differential amplifier  35 . 
     Referring to  FIG. 5B , the magnitude and the phase output from the third differential amplifier  35  have maximum values at the point  40  where the electronic pen  60  is located. This may be confirmed from the magnitude and the phase output from the differential amplifier  30  at the first and fourth locations of the switch  10  in  FIG. 4B . 
     Further, as illustrated in  FIG. 5A , a method of obtaining a location of the electronic pen  60  by using the differences in magnitude and phase of the voltages output from the two adjacent line antennas  20  may offset noise generated from the two adjacent line antennas  20 , and thus, there is an advantage of more accurately finding the location of the electronic pen  60 . 
     Meanwhile, in the embodiment, the location of the electronic pen  60  may be detected using the magnitudes and the phases of the voltages output from the two line antennas  20 , but by extending this, the location of the electronic pen  60  may be detected using the magnitudes and the phases of the voltages output from at least two line antennas. 
     As described above, in the display module  200  according to the embodiment, the location detecting unit  250  capable of detecting the touch location using the capacitance method and the location of the electronic pen using the electromagnetic induction method, is integrally provided in the display device  210  to form one unit module. 
     Referring to  FIGS. 6 and 7 , the location detecting unit  250  capable of detecting the touch location using the capacitance method and the location of the electronic pen using the electromagnetic induction method according to the first embodiment of the present invention will be described below. 
     The location detecting unit  250  according to the embodiment includes a base loop  251 , a plurality of first conductive patterns  252  which is elongated in a first direction and parallel to each other in a second direction crossing the first direction, a plurality of second conductive patterns  257  which is elongated in the second direction and parallel to each other in the first direction, and a plurality of third conductive patterns  258  which is elongated in the second direction, connected to the base loop  251 , and parallel to each other in the first direction. 
     Herein, the first direction is a width direction of the case frame  100  and the second direction is a length direction of the case frame  100 , but the directions may be defined reversely. In addition, one ends of the third conductive patterns  258  (particularly, an upper end of the third conductive pattern  252  illustrated in  FIGS. 6 and 7 ) are maintained to be connected to a controller  285  to be described below or set to be open state, or a predetermined voltage may be applied or grounded. The other end of the third conductive pattern  258  (particularly, a lower end of the third conductive pattern  252  illustrated in  FIGS. 6 and 7 ) may be connected to the base loop  251 . 
     The base loop  251  is disposed to surround at least a part of a sensing area. Herein, the sensing area refers to an area where a user approaches or touches a finger to enable a capacitive touch input, and approaches or touches an electromagnetic pen that emits an electromagnetic force to enable an induced electromagnetic field input. 
     The sensing area may be the entire surface of the display device  210  and in the embodiment, the sensing area coincides with an area surrounded by the base loop  251  in order to minimize a bezel width of the case frame  100 . 
     In addition, the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258  are disposed inside the sensing area and inside the base loop  251 . 
     Further, the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258  are insulated from each other. 
     Meanwhile, the location detecting unit  250  according to the embodiment needs to detect the touch location from the capacitance change due to the touch operation and the location of the electronic pen from the change of the induced electromagnetic field due to the electromagnetic induction. 
     To this end, the first conductive patterns  252  and the second conductive patterns  257  make pairs to detect touch location from the capacitance change due to the touch operation, and the first conductive patterns  252  and the third conductive patterns  257  make pairs to detect the location of the electronic pen from the change of the induced electromagnetic field. 
     Particularly, in this embodiment, the first conductive patterns  252  are commonly used for detecting the touch location using the capacitance method and the location of the electronic pen using the electromagnetic induction method. 
     To this end, as illustrated in  FIGS. 6 and 7 , a multiplexer  260  which is a switching element is provided at one side of the location detecting unit  250 . 
     The multiplexer  260  may be a 2:1 MUX  260  and the 2:1 MUX  260  has two inputs and one output. 
     The 2:1 MUXs  260  are disposed in a number corresponding to the number of the first conductive patterns  252 , one end of the first conductive pattern  252  (particularly, the left end of the first conductive pattern  252  illustrated in  FIGS. 6 and 7 ) is connected to one input of the 2:1 MUX  260  and the base loop  251  is connected to the other input, and the other end of the first conductive pattern  252  (particularly, the right end of the first conductive pattern  252  illustrated in  FIGS. 6 and 7 ) is connected to the output. 
     In addition, the 2:1 MUX  260  is controlled by a capacitance controller  281  or an electromagnetic induction controller  285  to be described below. 
     In a capacitance sensing mode of detecting the touch location due to the touch operation, when the capacitance controller  281  is activated, the 2:1 MUX  260  connects one ends and the other ends of the first conductive patterns  252  to each other. 
     In addition, the capacitance controller  281  applies a signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A and 2B ) to one ends and the other ends of the first conductive patterns  252  and senses a signal (e.g., the signal sensing pattern Rx illustrated in  FIGS. 2A and 2B ) shown in the second conductive patterns  257  to detect the touch location from the capacitance change due to the touch operation. Alternatively, the capacitance controller  281  applies the signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A  and  2 B) to one ends (particularly, the upper end of the second conductive pattern  257  illustrated in  FIGS. 6 and 7 ) and the other ends (particularly, the lower end of the second conductive pattern  257  illustrated in  FIGS. 6 and 7 ) of the second conductive patterns  257  and senses the signal shown in the first second conductive patterns  252  to detect the touch location from the capacitance change due to the touch operation. 
     Meanwhile, the 2:1 MUX  260  applies the signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A and 2B ) to any one of one ends and the other ends of the first conductive patterns  252  while one ends and the other ends of the first conductive patterns  252  are disconnected from each other and senses the signal (e.g., the signal sensing pattern Rx illustrated in  FIGS. 2A and 2B ) shown in the second conductive patterns  257  to detect the touch location from the capacitance change due to the touch operation. Alternatively, the 2:1 MUX  260  applies the signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A and 2B ) to any one of one ends and the other ends of the second conductive patterns  257  and senses the signal (e.g., the signal sensing pattern Rx illustrated in  FIGS. 2A and 2B ) shown in the first conductive patterns  252  to detect the touch location from the capacitance change due to the touch operation. 
     Meanwhile, although not illustrated, the multiplexer may be an N:1 MUX (not illustrated) and the N:1 MUX has N inputs and one output. The other ends of the first conductive patterns  252  are connected to the N inputs of the N:1 MUX and the base loop  252  is connected to the output. 
     As such, when the multiplexer is configured by the N:1 MUX, while the first conductive patterns  252  are disconnected from the base loop  251 , the capacitance controller  281  applies the signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A and 2B ) to any one of one ends and the other ends of the first conductive patterns  252  and senses the signal (e.g., the signal sensing pattern Rx illustrated in  FIGS. 2A and 2B ) shown in the second conductive patterns  257  to detect the touch location from the capacitance change due to the touch operation. Alternatively, the capacitance controller  281  applies the signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A and 2B ) to any one of one ends and the other ends of the second conductive patterns  257  and senses the signal (e.g., the signal sensing pattern Rx illustrated in  FIGS. 2A and 2B ) shown in the first conductive patterns  252  to detect the touch location from the capacitance change due to the touch operation. 
     As such, the first conductive patterns  252  and the second conductive patterns  257  make pairs to be used for detecting the touch location from the capacitance change due to the touch operation as illustrated in  FIG. 3  described above. 
     In addition, in an electromagnetic induction mode of detecting the location of the electronic pen from the change in induced electromagnetic field, when the electromagnetic induction controller  285  is activated, the 2:1 MUX  260  connects the other ends of the first conductive patterns  252  with the base loop  251 . 
     In addition, the electromagnetic induction controller  285  compares the voltage of the base loop  251  with the inductive voltage output from one ends of the first conductive patterns  252  to detect the location of the electronic pen (the location of the induced electric field transmitted from the resonance circuit) in the second direction (see  FIGS. 4A and 4B ) or detect the location of the electronic pen in the second direction based on the signal output from one end of the two adjacent first conductive patterns  252  (particularly, by comparing a difference of the inductive voltage) (see  FIGS. 5A and 5B ). Further, the electromagnetic induction controller  285  compares the voltage of the base loop  251  with the inductive voltage output from one ends of the third conductive patterns  258  to detect the location of the electronic pen (the location of the induced electric field transmitted from the resonance circuit) in the first direction (see  FIGS. 4A and 4B ) or detect the location of the electronic pen in the first direction based on the signal output from one end of the two adjacent third conductive patterns  258  (particularly, by comparing a difference of the inductive voltage) (see  FIGS. 5A and 5B ). 
     Meanwhile, although not illustrated, when the multiplexer is the N:1 MUX (not illustrated), the N:1 MUX detects a transmission location of the induced electromagnetic field in the second direction based on the voltage of the base loop  251  and the voltage output from one end of the selected first conductive pattern  252  while the other ends of the first conductive patterns  252  are connected with the base loop  251  (see  FIGS. 4A and 4B ) or may detect the location of the electronic pen in the second direction based on the signal output from one ends of the two adjacent first conductive patterns  252  (particularly, by comparing the difference of the induced voltage) (see  FIGS. 5A and 5B ). Further, the N:1 MUX detects a transmission location of the induced electromagnetic field in the first direction based on the voltage of the base loop  251  and the inductive voltage output from one end of the selected third conductive pattern  252  connected with the base loop  251  (see  FIGS. 4A and 4B ) or may detect the location of the electronic pen in the first direction based on the signal output from one ends of the two adjacent third conductive patterns  252  (particularly, by comparing the difference of the induced voltage) (see  FIGS. 5A and 5B ). 
     As such, the first conductive patterns  252  and the third conductive patterns  257  make pairs to be used for detecting the location of the electronic pen from the change in the induced electromagnetic field as illustrated in  FIGS. 3 to 5B  described above. 
     Meanwhile, a structure in which the location detecting unit  250  according to the embodiment is integrally provided in the display device  210  will be described below. 
     For example, as illustrated in  FIG. 8 , when the display device  210  is the LCD, a structure of the display module  200  in which the display device  210  and the location detecting unit  250  are integrated will be described below. 
     The LCD is formed by sequentially stacking respective constituent elements including a bottom polarizer  212  on a backlight unit  211 , a TFT glass substrate  213  on which a thin film transistor (TFT)  214 , a liquid crystal layer  215 , a filter glass substrate  217  in which a color filter  216  is deposited on the rear surface, a top polarizer  218 , a cover glass  219 , and the like. 
     In this case, in order to minimize the thickness of the display module  200 , the location detecting unit  250  according to the embodiment may be integrally formed on the upper surface of the filter glass substrate  217  as illustrated in  FIG. 8 . 
     Particularly, as illustrated in  FIG. 9 , the first conductive patterns  252 , the second conductive patterns  257 , and the third conductive patterns  259  may be formed to be sequentially deposited on the upper surface of the filter glass substrate  217 . 
     That is, the second conductive patterns  257  and the third conductive patterns  258  are alternately formed on the upper surface of the filter glass substrate  217  in parallel in the first direction, and as illustrated in  FIGS. 6 and 9 , the first conductive patterns  252  are formed on the upper surface of the filter glass substrate  217  by connecting a plurality of unit conductive patterns  253  formed in the first direction between the plurality of second conductive patterns  257  and third conductive patterns  258  with a bridge  254 . 
     Herein, the bridge  254  is connected to a wire  256  so that the plurality of unit conductive patterns  253  spaced apart from each other to maintain a state in which the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns are insulated from each other electrically communicate with each other and the outside of the wire  256  is covered by an insulator  255 . As such, the plurality of unit conductive patterns  253  are connected to each other with the bridge  254  to form the first conductive patterns  253 . 
     Meanwhile, a plurality of first conductive patterns  252  are formed on the upper surface of the filter glass substrate  217  in parallel in the second direction, and as illustrated in  FIG. 7 , the second conductive patterns  257  and the third conductive patterns  258  may be formed by connecting the plurality of unit conductive patterns  253  formed between the plurality of first conductive patterns  252  in the second direction with the bridge  254 . 
     In addition, the base loop  251  is formed at the upper edge of the filter glass substrate  217  to be spaced apart from the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258  and disposed to cover the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258 . 
     Further, in  FIG. 9 , it is illustrated that the base loop  251  is disposed at the upper edge of the filter glass substrate  217 , but is not limited thereto and may be disposed at the lower edge of the filter glass substrate  217 . 
     Further, the first conductive patterns  252 , the second conductive patterns  257 , and the third conductive patterns  258  may be formed on one surface and the other surface of the filter glass substrate  217 . 
     Particularly, as illustrated in  FIG. 10 , a plurality of second conductive patterns  257  and third conductive patterns  258  are alternately formed on the upper surface of the filter glass substrate  217  in the first direction in parallel and a plurality of first conductive patterns  252  may be formed on the lower surface of the filter glass substrate  217  in the second direction in parallel. 
     As described above, when the first conductive patterns  252  are formed on the lower surface of the filter glass substrate  217  and the second conductive patterns  257  and the third conductive patterns  258  are formed on the upper surface of the filter glass substrate  217 , the bridge  254  illustrated in  FIG. 9  needs not to be used. 
     In addition, the base loop  251  is formed at the upper edge or the lower edge of the filter glass substrate  217  to be spaced apart from the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258  and disposed to cover the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258 . 
     Further, in  FIGS. 9 and 10 , the base loop  251  is formed on the upper surface or the lower surface of the filter glass substrate  217 , but is not limited thereto, and the base loop  251  may be disposed at any place of the respective constituent elements configuring the LCD having the stacked structure illustrated in  FIG. 8  and particularly, may be formed on the bottom of the backlight unit  211 . 
     Meanwhile, in  FIGS. 8 to 10 , it is illustrated that the first conductive patterns  252 , the second conductive patterns  257 , the third conductive patterns  258 , and the base loop  251  are formed on the upper surface or the lower surface of the filter glass substrate  217 , and the embodiment is not limited thereto. The first conductive patterns  252 , the second conductive patterns  257 , the third conductive patterns  258 , and the base loop  251  may be formed on one surface or the other surface of any one of the respective constituent elements including the backlight unit  211 , the bottom polarizer  212 , the TFT glass substrate  213 , the filter glass substrate  217 , the top polarizer  218 , the cover glass  219 , and the like which configure the LCD device having the stacked structure illustrated in  FIG. 8 . 
     Further, the first conductive patterns  252 , the second conductive patterns  257 , the third conductive patterns  258 , and the base loop  251  may be disposed on the bottom of the display module  200  according to the embodiment. 
     In addition, the base loop  251  is formed to be spaced apart from the patterns of at least one of the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258 . 
     Further, for example, as illustrated in  FIG. 11 , when the display device is the OLED, a structure of the display module  200  in which the display device  210  and the location detecting unit  250  are integrated will be described below. 
     As illustrated in  FIG. 11 , the OLED is formed by sequentially stacking respective constituent elements including a TFT glass substrate  213   a  deposited with a TFT  214   a , an organic EL layer  215   a , a polarizer  218   a , a cover glass  219   a , and the like. 
     In this case, in order to minimize the thickness of the display module  200 , the location detecting unit  250  according to the embodiment may be stacked between the organic EL layer  215   a  and the polarizer  218   a  to be integrally formed. 
     Particularly, as illustrated in  FIG. 9 , a glass substrate  217   a  is stacked between the organic EL layer  215   a  and the polarizer  218   a , and the first conductive patterns  252 , the second conductive patterns  257 , and the third conductive patterns  259  may be formed to be sequentially deposited on the upper surface of the glass substrate  217   a.    
     That is, the second conductive patterns  257  and the third conductive patterns  258  are alternately formed on the upper surface of the glass substrate  217   a  in parallel in the first direction, and the first conductive patterns  252  are formed on the upper surface of the glass substrate  217  by connecting a plurality of unit conductive patterns  253  formed in the first direction between the plurality of second conductive patterns  257  and third conductive patterns  258  with a bridge  254 . 
     Herein, the bridge  254  is connected to a wire  256  so that the plurality of unit conductive patterns  253  spaced apart from each other to maintain a state in which the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns are insulated from each other electrically communicate with each other and the outside of the wire  256  is covered by an insulator  255 . As such, the plurality of unit conductive patterns  253  are connected to each other with the bridge  254  to form the first conductive patterns  253 . 
     Meanwhile, a plurality of first conductive patterns  252  are formed on the upper surface of the filter glass substrate  217  in parallel in the second direction, and as illustrated in  FIG. 7 , the second conductive patterns  257  and the third conductive patterns  258  may be formed by connecting the plurality of unit conductive patterns  253  formed between the plurality of first conductive patterns  252  in the second direction with the bridge  254 . 
     In addition, the base loop  251  is formed at the upper edge of the glass substrate  217   a  to be spaced apart from the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258  and disposed to cover the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258 . 
     Meanwhile, in  FIG. 9 , it is illustrated that the base loop  251  is disposed at the upper edge of the glass substrate  217   a , but is not limited thereto and may be disposed at the lower edge of the glass substrate  217   a.    
     Further, the first conductive patterns  252 , the second conductive patterns  257 , and the third conductive patterns  258  may be formed on one surface and the other surface of the glass substrate  217   a.    
     Particularly, as illustrated in  FIG. 10 , a plurality of second conductive patterns  257  and third conductive patterns  258  are alternately formed on the upper surface of the glass substrate  217   a  in the first direction in parallel, and a plurality of first conductive patterns  252  may be formed on the lower surface of the glass substrate  217   a  in the second direction in parallel. 
     As described above, when the first conductive patterns  252  are formed on the lower surface of the glass substrate  217  and the second conductive patterns  257  and the third conductive patterns  258  are formed on the upper surface of the glass substrate  217   a , the bridge  254  illustrated in  FIG. 9  needs not to be used. 
     In addition, the base loop  251  is formed at the upper edge or the lower edge of the glass substrate  217   a  to be spaced apart from the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258  and disposed to cover the first conductive patterns  252 , the second conductive patterns  257  and the third conductive patterns  258 . 
     Further, in  FIGS. 9 and 10 , the base loop  251  is formed on the upper surface or the lower surface of the glass substrate  217   a , but is not limited thereto, and the base loop  251  may be disposed at any place of the respective constituent elements configuring the OLED having the stacked structure illustrated in  FIG. 11 . 
     Meanwhile, in  FIGS. 9 and 10 , it is illustrated that the first conductive patterns  252 , the second conductive patterns  257 , the third conductive patterns  258 , and the base loop  251  are formed on the upper surface or the lower surface of the glass substrate  217   a , and the embodiment is not limited thereto. The first conductive patterns  252 , the second conductive patterns  257 , the third conductive patterns  258 , and the base loop  251  may be formed on one surface or the other surface of any one of the respective constituent elements including the TFT glass substrate  213   a , the polarizer  218   a , the cover glass  219   a , and the like which configure the OLED device having the stacked structure illustrated in  FIG. 11 . Further, the first conductive patterns  252 , the second conductive patterns  257 , the third conductive patterns  258 , and the base loop  251  may be disposed on the bottom of the display module  200  according to the embodiment. 
     Further, the location detecting unit  250  according to the embodiment may detect the location of the electronic pen using the electromagnetic induction method. 
     The detecting of the location of the electronic pen using the electromagnetic induction method needs to be configured so that the electronic pen may emit electromagnetic force. 
     Accordingly, the electronic pen may be configured to provide a battery and emit electromagnetic force by the battery itself, but in the embodiment, even when the battery is not provided in the electronic pen, the electronic pen is configured to emit the electromagnetic force to supply the energy to the electronic pen. 
     As a result, the display module  200  according to the embodiment further includes an energy supply unit  270  which is integrally provided in the display device and supplies energy to the electronic pen by applying a frequency corresponding to the resonance frequency of the resonance circuit of the electronic pen. 
     In the energy supply to the electronic pen, it is preferred that the energy is supplied to the electronic pen before detecting the location of the electronic pen using the electromagnetic induction method. 
     The energy supply unit  270  includes a power coil  270  in a coil form, and a coil driver (not illustrated) for driving the power coil  270  by supplying AC voltage and current to the power coil  270 . 
     The power coil  270  serves to supply the energy to the electronic pen including the resonance circuit using the induced electromagnetic field. 
     The AC voltage/current corresponding to the resonance frequency of the resonance circuit of the electronic pen is applied to the power coil  270 . In addition, the power coil  270  may be disposed outside the sensing area, inside the sensing area, or outside and inside the sensing area. 
     In addition, the power coil  270  may be formed of a single pattern printed on the substrate in a coil form, or a plurality of substrates formed with the coil-shaped patterns may be configured to overlap with each other and connect to each other. 
     The power coil  270  may be disposed at a location spaced apart from the outside at a predetermined interval from the base loop  251  coinciding with the sensing area as illustrated in  FIGS. 6 and 7 . 
     Further, the power coil  270  may be stacked on the bottom of the backlight unit  211  as illustrated in  FIG. 8  and may be stacked on the bottom of the TFT glass substrate  213   a  as illustrated in  FIG. 11 . 
     Further, although not illustrated, the power coil  270  may be integrally provided at the side of the display device  210  and stacked on the bottom of the backlight unit  211  or the TFT glass substrate  213   a  together with the base loop  251 . 
     The electronic pen emits electromagnetic force while causing resonance due to an inductive current by the electromagnetic force generated from the power coil  270  and emits electromagnetic force which is gradually offset even though the electromagnetic force is removed from the power coil  270 . 
     Meanwhile, the first conductive patterns  252  and the second conductive patterns  257  make pairs to be used for detecting a touch location from the capacitance change due to the touch operation, and the first conductive patterns  252  and the third conductive patterns  257  make pairs to be used for detecting the location of the electronic pen from the change in the induced electromagnetic field. 
     Accordingly, the display module  200  according to the first embodiment of the present invention further includes a capacitance controller  281  to control the detection of the touch location and the location of the electronic pen and an electromagnetic induction controller  285 . 
     The capacitance controller  281  serves to detect the touch location from the capacitance change due to the touch operation of a finger and the like. 
     Referring to  FIGS. 6 and 7 , as described above, the capacitance controller  281  controls the 2:1 MUX  260  to connect one ends of the first conductive patterns  252  to the other ends of the first conductive patterns  252  or open the other ends of the first conductive patterns  252 . 
     In addition, the capacitance controller  281  applies the signal (for example, the signal input pattern Tx in  FIGS. 2A and 2B ) to at least one of one ends and the other ends of the first conductive patterns  252  and senses a signal (for example, the signal sensing pattern Rx in  FIGS. 2A and 2B ) shown in the second conductive patterns  257  to detect the touch location from the capacitance change due to the touch operation. 
     In addition, the capacitance controller  281  applies the signal (for example, the signal input pattern Tx in  FIGS. 2A and 2B ) to at least one of one ends and the other ends of the second conductive patterns  257  and senses a signal (for example, the signal sensing pattern Rx in  FIGS. 2A and 2B ) shown in the first conductive patterns  252  to detect the touch location from the capacitance change due to the touch operation. 
     That is, the capacitance controller  281  identifies a location where a characteristic (for example, an amplitude or a frequency) of the RX signal to determine a cross point of the first conductive pattern  252  and the second conductive pattern  257  corresponding to the corresponding location as the touch location. 
     Further, as described above, the electromagnetic induction controller  285  controls the 2:1 MUX  260  to connect the other ends of the first conductive patterns  252  to the base loop  251  and detects a transmission location of the induced electromagnetic field in the second direction based on the voltage of the base loop  251  and the inductive voltage output from the one ends of the first conductive patterns  252 . Herein, one ends of the first conductive patterns  252  are connected to the electromagnetic induction controller  285 . 
     Particularly, the electromagnetic induction controller  285  connects the other ends of the plurality of first conductive patterns  252  to the base loop  251  and compares the voltage of the base loop  251  with the inductive voltage output from one ends of the first conductive patterns  252  to detect the location of the electronic pen in the second direction (the location of the induced electromagnetic field emitted from the resonance circuit) (see  FIGS. 4A and 4B ) or compares a difference of the inductive voltages output from one ends of the two adjacent first conductive patterns  252  to detect the location of the electronic pen in second direction (see  FIGS. 5A and 5B ). 
     In addition, the electromagnetic induction controller  285  compares the voltage of the base loop  251  with the inductive voltage output from one ends of the selected third conductive patterns  258  while the other ends of the third conductive patterns  258  are connected to the base loop  251  to detect the location of the electronic pen in the first direction (see  FIGS. 4A and 4B ) or compares a difference of the inductive voltages output from one ends of the two adjacent third conductive patterns  258  to detect the location of the electronic pen in first direction (see  FIGS. 5A and 5B ). Herein, one ends of the third conductive patterns  258  are connected to the electromagnetic induction controller  285 . 
     Meanwhile, in the embodiment, it is described that the location of the electronic pen is detected by comparing differences of inductive voltages output from one ends of the two adjacent first conductive patterns  252  and one ends of the two adjacent third conductive patterns  258 , but it is not limited thereto. Further, the location of the electronic pen may be detected by comparing differences of inductive voltages output from one ends of at least two first conductive patterns  252  and one ends of the third conductive patterns  258 . 
     In addition, the display module  200  according to the first embodiment of the present invention further includes a main controller  280  to control independently the capacitance controller  281  and the electromagnetic induction controller  285 . The capacitance controller  281  and the electromagnetic induction controller  285  are connected to the main controller  280  and selectively operated. 
     That is, the main controller  280  activates the capacitance controller  281  in the case of detecting the touch location and reversely, activates the electromagnetic induction controller  285  in the case of detecting the location of the electronic pen. 
     Since the capacitance controller  281  and the electromagnetic induction controller  285  commonly use the first conductive patterns  252 , the respective operations do not overlap with each other and selectively operate. 
     Accordingly, the capacitance controller  281  and the electromagnetic induction controller  285  are connected to the main controller  280  to mutually transmit an occupancy rate and an occupancy time for the first conductive patterns  252 . 
     Meanwhile, while the capacitance controller  281  is operating, the unused base loop  251  may be set to an open state, or a specific voltage may be applied or grounded. In the embodiment, the base loop  251  is opened. 
     Further, while capacitance controller  281  is operating, the unused third conductive patterns  258  are maintained to be connected to the electromagnetic induction controller  285  or may be set to an open state, or a specific voltage may be applied or grounded. 
     As described above, referring to  FIGS. 6 and 7 , the first conductive patterns  252  may be used to sense both the capacitance touch and the induced electromagnetic field input, and when the first direction is the width direction of the case frame  100  and the second direction is the length direction of the case frame  100 , connection lines of the second conductive patterns  257  and the third conductive patterns  258  may be disposed in the length direction of the case frame  100  without increasing in the bezel width direction which is the side of the case frame  100 , thereby minimizing the size of the bezel width for disposing the connection lines. 
     Next, a display device according to a second embodiment of the present invention will be described below. 
       FIGS. 12 and 13  are plan views illustrating a structure of a location detecting unit according to a second embodiment of the present invention and  FIGS. 14 and 15  are cross-sectional views illustrating the location detecting unit which is formed on a filter glass substrate of the LCD according to the first embodiment of the present invention, as cross-sectional views taken along line B-B. 
     A display device according to a second embodiment of the present invention includes a case frame (not illustrated), a display module (not illustrated) which is embedded in the case frame to detect a touch location due to a touch operation and a location of an electronic pen while displaying an image, and a window glass (not illustrated) disposed on a front surface of the case frame. 
     Since the case frame and the window glass according to the second embodiment of the present invention are the same as the case frame  100  and the window glass  300  according to the first embodiment of the present invention, the detailed description thereof will be omitted. 
     Hereinafter, the display module which is a difference from the first embodiment of the present invention will be described. 
     The display module according to the second embodiment of the present invention includes a display device that visually displays an image, and a location detecting unit  250   a  which is integrally provided in the display device and detects a touch location from a change in capacitance due to a touch operation and detects a location of an electronic pen from a change in inductive electromagnetic field due to electromagnetic induction. 
     In the display module according to the embodiment, the location detecting unit  250  is integrally provided in the display device to form one unit module. 
     In the embodiment, the display device serves to display the image to a user and may be various display devices including an organic light emitting diode (OLED), a liquid crystal display (LCD), an active matrix organic light emitting diode (AMOLED), a field emission display (FED), and the like. In addition, in the embodiment, the display device includes both flat and curved types. 
     In the embodiment, the location detecting unit  250   a  serves to detect the touch location from a change in capacitance due to the touch operation and the location of the electronic pen from a change in induced electromagnetic field generated when the electronic pen emitting electromagnetic force is approached. 
     The location detecting unit  250   a  according to the embodiment includes a base loop  251   a , a plurality of first conductive patterns  252   a  which are elongated in a first direction and parallel to each other in a second direction crossing the first direction, a plurality of second conductive patterns  257   a  which are elongated in the second direction and parallel to each other in the first direction. 
     Herein, the first direction is a width direction of the case frame and the second direction is a length direction of the case frame, but the directions may be defined reversely. 
     The base loop  251   a  is disposed to surround a sensing area. Herein, the sensing area refers to an area where a user approaches or touches a finger to enable a capacitive touch input, and approaches or touches an electromagnetic pen that emits an electromagnetic force to enable an induction electromagnetic field input. 
     The sensing area may be the entire surface of the display device and in the embodiment, the sensing area coincides with an area surrounded by the base loop  251   a  in order to minimize a bezel width of the case frame. 
     In addition, the first conductive patterns  252   a  and the second conductive patterns  257   s  are disposed inside the sensing area and inside the base loop  251   a.    
     Further, the first conductive patterns  252   a  and the second conductive patterns  257   a  are insulated from each other. 
     Meanwhile, the location detecting unit  250   a  according to the embodiment needs to detect the touch location from the capacitance change due to the touch operation and the location of the electronic pen from the change in the induced electromagnetic field due to the electromagnetic induction. 
     To this end, the first conductive patterns  252   a  and the second conductive patterns  257   a  make pairs to be used for detecting the touch location from the capacitance change due to the touch operation and the location of the electronic pen from the change in the induced electromagnetic field due to the electromagnetic induction. 
     As illustrated in  FIGS. 12 and 13 , a multiplexer  260   a  which is a switching element is provided at one side of the location detecting unit  250   a.    
     The multiplexer  260   a  may be an N:1 MUX  260   a  and the N:1 MUX  260   a  has N inputs and one output. 
     The other ends of the first conductive patterns  252   a  (particularly, the right end of the first conductive pattern  252   a  illustrated in  FIGS. 12 and 13 ) and the other ends of the second conductive patterns  257   a  (particularly, the lower end of the second conductive pattern  257   a  illustrated in  FIGS. 12 and 13 ) are connected to the N inputs of the N:1 MUX  260   a  and the base loop  251   a  is connected to the output. 
     The N:1 MUX  260   a  is controlled by a capacitance controller  281   a  or an electromagnetic induction controller  285   a  to be described below. 
     In a capacitance sensing mode for detecting the touch location due to the touch operation, when the capacitance controller  281   a  is activated, the N:1 MUX  260   a  disconnects the other ends of the first conductive patterns  252   a  and the second conductive patterns  257   a  from the base loop  251   a.    
     In addition, the capacitance controller  281   a  applies a signal (for example, a signal input pattern Tx in  FIGS. 2A and 2B ) to at least one of one ends and the other ends of the first conductive patterns  252   a  in a state where the first conductive patterns  252   a  and the second conductive patterns  257   a  are disconnected from the base loop  251   a  and senses a signal shown in the second conductive pattern  257   a  (for example, a signal sensing pattern Rx in  FIGS. 2A and 2B ) to detect a touch location from the capacitance change due to the touch operation. Alternatively, the capacitance controller  281   a  applies a signal (for example, a signal input pattern Tx in  FIGS. 2A and 2B ) to at least one of one ends (particularly, the upper end of the second conductive pattern  257   a  illustrated in  FIGS. 12 and 13 ) and the other ends of the second conductive patterns  257   a  and senses a signal shown in the first conductive patterns  252   a  (for example, a signal sensing pattern Rx in  FIGS. 2A and 2B ) to detect a touch location from the capacitance change due to the touch operation. 
     Further, although not illustrated, the multiplexer may be a 2:1 MUX and the 2:1 MUX has two inputs and one output. 
     The 2:1 MUX is arranged in a number corresponding to the number of the first conductive patterns  252   a  and the second conductive patterns  257   a , and one end of the first conductive pattern  252   a  or the second conductive pattern  257   a  is connected to one input of the 2:1 MUX, the base loop  251   a  is connected to the other input, and the other end of the first conductive pattern  252   a  or the second conductive pattern  257   a  is connected to the output. 
     As such, when the multiplexer is configured by the 2:1 MUX, while the first conductive patterns  252   a  and the second conductive patterns  257   a  are disconnected to the base loop  251 , the capacitance controller  281   a  applies the signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A and 2B ) to at least one of one ends and the other ends of the first conductive patterns  252  and senses the signal shown in the second conductive patterns  257  (e.g., the signal sensing pattern Rx illustrated in  FIGS. 2A and 2B ) to detect the touch location from the capacitance change due to the touch operation. Alternatively, the capacitance controller  281  applies the signal (e.g., the signal input pattern Tx illustrated in  FIGS. 2A and 2B ) to at least one of one ends and the other ends of the second conductive patterns  257  and senses the signal shown in the first conductive patterns  252  (e.g., the signal sensing pattern Rx illustrated in  FIGS. 2A and 2B ) to detect the touch location from the capacitance change due to the touch operation. 
     As such, the first conductive patterns  252   a  and the second conductive patterns  257   a  make pairs to be used for detecting the touch location from the capacitance change due to the touch operation as illustrated in  FIG. 3  described above. 
     Further, in an electromagnetic induction mode of detection a location of an electronic pen from a change in induced electromagnetic field, when the electromagnetic induction controller  285   a  is activated, the electromagnetic induction controller  285   a  controls the N:1 MUX  260   a  to detect the location of the electronic pen (a transmission location of the induced electromagnetic field) in the second direction by comparing the voltage of the base loop  251   a  with the voltage output from one end of the first conductive pattern  252   a  while the other ends of the first conductive patterns  252   a  and the second conductive patterns  257   a  are connected with the base loop  251   a  (see  FIGS. 4A and 4B ) or may detect the location of the electronic pen in the second direction based on the signal output from one ends of the two adjacent first conductive patterns  252   a  (particularly, by comparing the difference of the induced voltage) (see  FIGS. 5A and 5B ). Further, the electromagnetic induction controller  285   a  may detect the location of the electronic pen in the first direction by comparing the voltage of the base loop  251   a  and the inductive voltage output from one end of the second conductive pattern  257   a  (see  FIGS. 4A and 4B ) or may detect the location of the electronic pen in the first direction based on the signal output from the other ends of the two adjacent second conductive patterns  257   a  (particularly, by comparing the difference of the induced voltage) (see  FIGS. 5A and 5B ). 
     Meanwhile, although not illustrated, when the multiplexer is the 2:1 MUX, the electromagnetic induction controller  285   a  controls the N:1 MUX  260   a  to detect a transmission location of the induced electromagnetic field in the second direction based on the voltage of the base loop  251   a  and the voltage output from one ends of the selected first conductive patterns  252   a  while the other ends of the first conductive patterns  252   a  and the second conductive patterns  257   a  are connected with the base loop  251   a  (see  FIGS. 4A  and  4 B) or may detect the location of the electronic pen in the second direction based on the signal output from one ends of the two adjacent first conductive patterns  252  (particularly, by comparing the difference of the induced voltage) (see  FIGS. 5A and 5B ). Further, the electromagnetic induction controller  285   a  may detect the location of the electronic pen in the first direction based on the voltage of the base loop  251   a  and the voltage output from one ends of the selected second conductive patterns  257   a  connected to the base loop  251   a  (see  FIGS. 4A and 4B ) or may detect the location of the electronic pen in the first direction based on the signal output from the other ends of the two adjacent second conductive patterns  257   a  (particularly, by comparing the difference of the induced voltage) (see  FIGS. 5A and 5B ). As such, the first conductive patterns  252   a  and the third conductive patterns  257   a  make pairs to be used for detecting the location of the electronic pen from the change in the induced electromagnetic field as illustrated in  FIGS. 3 to 5B  described above. 
     Meanwhile, a structure in which the location detecting unit  250   a  according to the embodiment is integrally provided in the display device will be described below. 
     For example, as illustrated in  FIG. 8 , when the display device is the LCD, a structure of the display module  200  in which the display device and the location detecting unit  250   a  are integrated will be described below. 
     In order to minimize the thickness of the display module, the location detecting unit  250   a  according to the embodiment may be integrally formed on the upper surface of the filter glass substrate  217 . 
     Particularly, as illustrated in  FIG. 14 , the first conductive patterns  252   a  and the second conductive patterns  257   a  may be formed to be sequentially deposited on the upper surface of the filter glass substrate  217 . 
     That is, the second conductive patterns  257   a  are alternately formed on the upper surface of the filter glass substrate  217  in parallel in the first direction, and as illustrated in  FIGS. 12 and 14 , the first conductive patterns  252   a  are formed on the upper surface of the filter glass substrate  217  by connecting a plurality of unit conductive patterns  253   a  formed in the first direction between the plurality of second conductive patterns  257   a  with a bridge  254   a.    
     Herein, the bridge  254   a  is connected to a wire  256   a  so that the plurality of unit conductive patterns  253   a  spaced apart from each other to maintain a state in which the first conductive patterns  252   a  and the second conductive patterns  257   a  are insulated from each other electrically communicate with each other and the outside of the wire  256   a  is covered by an insulator  255   a . As such, the plurality of unit conductive patterns  253   a  are connected to each other with the bridge  254   a  to form the first conductive patterns  253   a.    
     Meanwhile, a plurality of first conductive patterns  252   a  are formed on the upper surface of the filter glass substrate  217   a  in parallel in the second direction, and as illustrated in  FIG. 11 , the second conductive patterns  257   a  may be formed by connecting the plurality of unit conductive patterns  253   a  formed between the plurality of first conductive patterns  252   a  in the second direction with the bridge  254   a.    
     In addition, the base loop  251   a  is formed at the upper edge of the filter glass substrate  217  to be spaced apart from the first conductive patterns  252   a  and the second conductive patterns  257   a  and disposed to cover the first conductive patterns  252   a  and the second conductive patterns  257   a.    
     Meanwhile, in  FIG. 11 , it is illustrated that the base loop  251   a  is disposed at the upper edge of the filter glass substrate  217 , but is not limited thereto and may be disposed at the lower edge of the filter glass substrate  217 . 
     Further, the first conductive patterns  252   a  and the second conductive patterns  257   a  may be formed on one surface and the other surface of the filter glass substrate  217 . 
     Particularly, as illustrated in  FIG. 15 , a plurality of second conductive patterns  257   a  are alternately formed on the upper surface of the filter glass substrate  217  in the first direction in parallel and a plurality of first conductive patterns  252   a  may be formed on the lower surface of the filter glass substrate  217  in the second direction in parallel. 
     As described above, when the first conductive patterns  252   a  are formed on the lower surface of the filter glass substrate  217  and the second conductive patterns  257   a  and the third conductive patterns  258  are formed on the upper surface of the filter glass substrate  217 , the bridge  254  illustrated in  FIG. 14  needs not to be used. 
     In addition, the base loop  251   a  is formed at the upper edge or the lower edge of the filter glass substrate  217  to be spaced apart from the first conductive patterns  252   a  and the second conductive patterns  257   a  and disposed to cover the first conductive patterns  252   a  and the second conductive patterns  257   a.    
     Further, in  FIGS. 14 and 15 , the base loop  251   a  is formed on the upper surface or the lower surface of the filter glass substrate  217 , but is not limited thereto, and the base loop  251   a  may be formed on the bottom of the backlight unit  211  illustrated in  FIG. 8 . 
     Meanwhile, in  FIGS. 8, 14, and 15 , it is illustrated that the first conductive patterns  252   a , the second conductive patterns  257   a , and the base loop  251   a  are formed on the upper surface or the lower surface of the filter glass substrate  217 , and the embodiment is not limited thereto. The first conductive patterns  252   a , the second conductive patterns  257   a , and the base loop  251   a  may be formed on one surface or the other surface of any one of the respective constituent elements including the backlight unit  211 , the bottom polarizer  212 , the TFT glass substrate  213 , the filter glass substrate  217 , the top polarizer  218 , the cover glass  219 , and the like which configure the LCD device having the stacked structure illustrated in  FIG. 8 . Further, the first conductive patterns  252   a , the second conductive patterns  257   a , and the base loop  251   a  may be disposed on the bottom of the display module  200  according to the embodiment. 
     In addition, the base loop  251   a  is formed to be spaced apart from the patterns of at least one of the first conductive patterns  252   a  and the second conductive patterns  257   a.    
     Further, in the case where the display device is the OLED, when describing the structure of the display module in which the display device and the locating detecting unit  250   a  are integrated, as illustrated in  FIGS. 14 and 15 , it is illustrated that the first conductive patterns  252   a , the second conductive patterns  257   a , and the base loop  251   a  are formed on the upper surface or the lower surface of the glass substrate  217   a , and the embodiment is not limited thereto. The first conductive patterns  252   a , the second conductive patterns  257   a , and the base loop  251   a  may be formed on one surface or the other surface of any one of the respective constituent elements including the TFT glass substrate  213   a , the polarizer  218   a , the cover glass  219   a , and the like which configure the OLED device having the stacked structure illustrated in  FIG. 11 . Further, the first conductive patterns  252   a , the second conductive patterns  257   a , and the base loop  251   a  may be disposed on the bottom of the display module according to the embodiment. 
     Hereinafter, when the display device is the OLED, the structure of the display module in which the display device and the locating detecting unit  250   a  are integrated refers to the structure of the display module according to the first embodiment of the present invention, and the detailed description thereof will be omitted. 
     Referring to  FIGS. 12 and 13 , the display module according to the embodiment further includes an energy supply unit  270   a  which is integrally provided in the display device and supplies energy to the electronic pen by applying a frequency corresponding to the resonance frequency of the resonance circuit of the electronic pen. 
     In addition, the energy supply unit  270   a  includes a power coil  270   a  in a coil form, and a coil driver (not illustrated) for driving the power coil  270   a  by supplying AC voltage and current to the power coil  270   a.    
     Since the power coil  270   a  according to the embodiment is the same as the power coil  270  according to the first embodiment of the present invention, the detailed description thereof will be omitted. 
     Meanwhile, the location detecting unit  250   a  according to the embodiment detects the touch location from the capacitance change due to the touch operation and the location of the electronic pen from the change of the induced electromagnetic field due to the electromagnetic induction. 
     In this case, while the other ends of the first conductive patterns  252   a  and the other ends of the second conductive patterns  257   a  are disconnected from the base loop  251   a , the first conductive patterns  252   a  and the second conductive patterns  257   a  make pairs to detect the touch location from the capacitance change due to the touch operation. 
     Further, while the first conductive patterns  252   a  and the other ends of the second conductive patterns  257   a  are connected with the base loop  251   a , the first conductive patterns  252   a  and the second conductive patterns  257   a  make pairs to detect the location of the electronic pen from the change in the induced electromagnetic field generated when the electronic pen emitting electromagnetic force is approached. 
     Accordingly, the display module according to the second embodiment of the present invention further includes a capacitance controller  281   a  to control the detection of the touch location and the location of the electronic pen and an electromagnetic induction controller  285   a.    
     Referring to  FIGS. 12 and 13 , the capacitance controller  281   a  controls an N:1 MUX  260   a  and applies a signal (for example, a signal input pattern Tx of  FIGS. 2A and 2B ) to at least one of one ends and the other ends of the first conductive patterns  252   a  while the first conductive patterns  252   a  and the other ends of the second conductive patterns  257   a  are disconnected from the base loop  251   a  and senses a signal shown in the second conductive patterns  257   a  (for example, a signal sensing pattern Rx of  FIGS. 2A and 2B ) to detect the touch location from the capacitance change due to the touch operation. 
     Further, the capacitance controller  281   a  applies the signal (for example, the signal input pattern Tx in  FIGS. 2A and 2B ) to at least one of one ends and the other ends of the second conductive patterns  257   a  and senses a signal (for example, the signal sensing pattern Rx in  FIGS. 2A and 2B ) shown in the first conductive patterns  252   a  to detect the touch location from the capacitance change due to the touch operation. 
     That is, the capacitance controller  281   a  identifies a location where a characteristic (for example, an amplitude or a frequency) of the RX signal to determine a cross point of the first conductive pattern  252   a  and the second conductive pattern  257   a  corresponding to the corresponding location as the touch location. 
     Meanwhile, the electromagnetic induction controller  285   a  controls the N:1 MUX  260   a  to detect a transmission location of the induced electromagnetic field in the second direction based on the voltage of the base loop  251   a  and the voltage output from one ends of the selected first conductive patterns  252   a  while the first conductive patterns  252   a  and the other ends of the second conductive patterns  257   a  are connected with the base loop  251   a  (see  FIGS. 4A and 4B ) or may detect the location of the electronic pen in the second direction by comparing the difference of the induced voltage output from one ends of the two adjacent first conductive patterns  252   a  (see  FIGS. 5A and 5B ). Further, one ends of the first conductive patterns  252   a  and the second conductive patterns  257   s  are connected to the electromagnetic induction controller  285   a.    
     In addition, the electromagnetic induction controller  285   a  detects a transmission location of the induced electromagnetic field in the first direction based on the voltage of the base loop  251   a  and the voltage output from one ends of the selected second conductive patterns  252   a  (see  FIGS. 4A and 4B ) or may detect the location of the electronic pen in the first direction by comparing the difference of the induced voltage output from one ends of the two adjacent second conductive patterns  257   a  (see  FIGS. 5A and 5B ). 
     Meanwhile, in the embodiment, it is described that the location of the electronic pen is detected by comparing differences of inductive voltages output from one ends of the two adjacent first conductive patterns  252  and one ends of the two adjacent second conductive patterns  257   a , but it is not limited thereto. Furthermore, the location of the electronic pen may be detected by comparing differences of inductive voltages output from one ends of at least two first conductive patterns  252   a  and one ends of the second conductive patterns  257   a.    
     In addition, the display module according to the second embodiment of the present invention further includes a main controller  280   a  to control independently the capacitance controller  281   a  and the electromagnetic induction controller  285   a . The capacitance controller  281   a  and the electromagnetic induction controller  285   a  are connected to the main controller  280   a  and selectively operated. 
     That is, the main controller  280   a  activates the capacitance controller  281   a  in the case of detecting the touch location and reversely, activates the electromagnetic induction controller  285   a  in the case of detecting the location of the electronic pen. 
     As described above, the present invention is not limited to the embodiments described herein, and it would be apparent to those skilled in the art that various changes and modifications might be made without departing from the spirit and the scope of the present invention. Therefore, it will be determined that the changed examples or modified examples are included in the appended claims of the present invention. 
     INDUSTRIAL APPLICABILITY 
     The present invention may be applied to an information technology (IT) industry field.