PATENT ABSTRACT
A cover device including: a rear cover; a front cover rotatable with respect to the rear cover; and an odor detection module mounted to the front cover. The cover device enables miniaturization of an odor detector and ensures portability of an electronic device even through the odor detector is connected to the electronic device, and enhances the outward appearances of the electronic device, and an electronic device having the cover device.

PATENT DESCRIPTION
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims the benefit under 35 U.S.C. §119(a) of Korean Patent Application No. 10-2014-0063018 filed on May 26, 2014 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. 
     FIELD 
     One or more exemplary embodiments relate generally to an electronic device, and more particularly, to a cover device having an odor detector and an electronic device having the cover device. 
     BACKGROUND 
     Various electronic devices are available to users. Users access to various types of content from various types of electronic devices, such as a portable phone, an MP3 player, a Portable Multimedia Player (PMP), and an e-book reader. Diverse functions, including a camera function, a music video playback function, a multimedia playback function, and game paying function, as well as wireless transmission and reception of data, are integrated in these electronic devices. Owing to the portability, convenience, and multimedia functions of electronic devices, users may use them in diverse environment, both indoors and outdoors. As a consequence, a large number of users carry electronic devices daily. 
     Such an electronic device is provided with a display on its front surface to provide multi-functions. Many smartphones have a display occupying almost the entirety of its front surface, the display being responsive to a touch. 
     As described above, an electronic device may have various modules to allow a user to use various types of content as well as a voice call. In addition, the electronic device may have an odor detecting module, i.e., an odor detector. 
     Odor detectors, such as a gas/Volatile Organic Compound (VOC) sensor, may sense scent, odor, temperature, humidity, or other ambient air conditions, have been developed. An odor detector may be configured as a standalone device or in electrical or mechanical connection within an electronic device. If the odor detector is provided as a standalone device, the odor detector may sense scent, odor, temperature, humidity, or other ambient air conditions around it and may display the sensed information on a separate display window. On the other hand, if the odor detector is operated in connection to an electronic device, the odor detector may sense scent, odor, temperature, humidity, or other ambient air conditions around a user and may display the sensed information or its equivalent information on the electronic device. 
     In the case where the odor detector operates standalone, the odor detector should be provided with a display through which the user may view information about the ambient environment (odor, scent, temperature, humidity, or other ambient air conditions) and equipped with various parts for driving the display and displaying the sensed information on the display, such as a power supply, driver, and backlight. Due to these requirements, the size and cost of the standalone odor detector is increased. 
     On the other hand, in the case where the odor detector is connected to an electronic device, the odor detector may be connected to a connection port for power supply or data transmission and reception, or a connection port like an ear jack. In this case, the odor detector protrudes outward from the electronic device through the connection port, which makes the electronic device less portable and degrades an outer appearance of the electronic device. Moreover, if the electronic device connected to the odor detector is dropped or impacted, a connector of the odor detector or the connection port of the electronic device is vulnerable to damage. To use the odor detector, the odor detector must be connected to the electronic device. Frequent attachment and detachment of the odor detector to and from the electronic device increases the risk of breakage of the connector of the odor detector or the connection port of the electronic device. 
     If the odor detector is provided inside the electronic device, the odor detector is limited in its effectiveness in collecting ambient environment information such as odor, scent, temperature, humidity, or other ambient air conditions. As a consequence, data is difficult to detect accurately and data accuracy is decreased. 
     The above is presented to assist with an understanding of one or more exemplary embodiments. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to one or more exemplary embodiments. 
     SUMMARY 
     One or more exemplary embodiments may address the above-mentioned problems and/or disadvantages and provide the advantages described below. However, it is not necessary for an exemplary embodiment to address all of the above-mentioned problems or disadvantages, and an exemplary embodiment may not address any of the above-mentioned problems or disadvantages. 
     An aspect of one or more exemplary embodiments is to provide a cover device which enables miniaturization of an odor detector, ensures portability of an electronic device even though the odor detector is connected to the electronic device, and enhances the outward appearances of the electronic device, and an electronic device having the cover device. 
     Another aspect of one or more exemplary embodiments is to provide a cover device which is easily connected to an electronic device without adversely affecting a connection port, decreases the risk of damaging an odor detector or the electronic device when the odor detector or the electronic device is impacted, accommodates the odor detector, and ensures connection stability despite frequent attachment to or detachment from the electronic device, and an electronic device having the cover device. 
     Another aspect of one or more exemplary embodiments is to provide a cover device which activates an odor detector by connecting to an electronic device, has the odor detector exposed outward to enable the odor detector to easily detect accurate data of about an ambient environment (for example, odor, scent, humidity, temperature, and the like), and displays this data on the electronic device, and an electronic device having the cover device. 
     Another aspect of one or more exemplary embodiments is to provide a cover device with an odor detector, to which a scent cartridge is electrically connected so that the cover device may receive contents of an electronic device (for example, a rose displayed on a display of the electronic device) and provide information (for example, fragrance, odor, and the like) to a user according to the contents of the electronic device, and an electronic device having the cover device. 
     In accordance with an aspect of one or more exemplary embodiments, there is provided a cover device. The cover device includes: a rear cover; a front cover rotatable with respect to the rear cover; and an odor detection module mounted to the front cover. 
     An opening may be formed on a front surface of the front cover, and the odor detection module may be accommodated in opening. 
     The cover device may further include a multi-porous member disposed on a front surface of the opening configured to enable the odor detection module to detect information corresponding to an ambient environment. 
     The opening may include: a rear recess for detachably accommodating the odor detection module; and a front recess, having a larger area than the rear recess, for accommodating the multi-porous member. 
     The opening may include a plurality of porous holes. 
     The front cover may include: a first member having the opening; and a second member on a surface of the first member. 
     The odor detection module may be mounted between the first member and the second member on a rear surface of the opening. 
     The cover device may further include a connection module provided in the rear cover configured to connect with a connection terminal in a body of an electronic device to pair the odor detection module with the electronic device. 
     The connection module may include: a connection surface provided on the front cover, and configured to be electrically connected to the odor detection module when the odor detection module is mounted; a connection member provided on the rear cover and configured to be electrically connected to the odor detection module and the connection terminal of the body; and a connection line provided between the connection surface and the connection member. 
     The connection member may be configured to be electrically connected to at least one of a connection terminal connected at a micro Secure Digital (SD) connection port of a rear surface of the body, a connection terminal connected at a Universal Serial Bus (USB) connection port, a connection terminal connected at an ear jack connection port, and a connection terminal provided separately from connection ports on the rear surface of the body. 
     The connection module may be configured to wirelessly connect with the electronic device using at least one of a Near Field Communication (NFC) connection, a Bluetooth connection, and a ZigBee connection. 
     The cover device may further include a power supply disposed on the front cover, configured to supply power to the odor detection module. 
     A recess may be formed around the odor detection module inside the front cover, and the power supply may be configured to be detachably accommodated in the recess formed around the odor detection module. 
     The cover device may further include a scent-emitting cartridge disposed on the front cover, scent-emitting cartridge configured to emit scent. 
     When the rear cover is engaged with a rear surface of a body of an electronic device, the scent-emitting cartridge may be paired with the electronic device. 
     In accordance with another aspect of one or more exemplary embodiments, there is provided a cover device. The cover device includes: a rear cover; a front cover rotatable with respect to the rear cover and comprising an opening; an odor detection module mounted in the opening; a multi-porous member mounted in the opening and covering the odor detection module; and a connection module configured to, when the rear cover is engaged with a rear surface of a body of the electronic device, pair the odor detection module with an electronic device. 
     The connection module may include: a connection member disposed on the rear cover, electrically connected to the odor detection module, and configured to be electrically connected to a connection port of the body when the rear cover is engaged with the rear surface of the body of the electronic device; and a connection line provided between the connection member and the odor detection module, and configured to electrically connect the odor detection module to the connection member. 
     The connection module may include at least one of a Near Field Communication (NFC) chip, Bluetooth chip, and ZigBee chip. 
     The cover device may further include a battery on the front cover configured to supply power to the odor detection module. 
     In accordance with another aspect of one or more exemplary embodiments, there is provided an electronic device having a cover device including: a body; a rear cover engaged with a rear surface of the body; a front cover rotatable with respect to the rear cover and configured to cover a front surface of the body; an odor detection module mounted to the front cover; a connection module configured to pair, when the rear cover is engaged with the rear surface of the body, the odor detection module with the body; and a controller configured to control the body according to a sensed value of the odor detection module. 
     The body may include a rear case comprising a battery mounting space on the rear surface of the body, and the rear cover may include a cover device configured to cover the rear case. 
     An opening may be formed on the front cover configured to accommodate the odor detection module, and the odor detection module may be mounted in the opening. 
     The electronic device may further include a plurality of porous holes provided in the opening. 
     The electronic device may further include a multi-porous member provided in the opening, covering the odor detection module and configured to enable the odor detection module to detect information corresponding to an ambient environment. 
     The connection module may include: a connection member disposed on the rear cover, and configured to electrically connect to the odor detection module and a connection port of the body; and a connection line provided between the connection member and the odor detection module, and configured to electrically connect the odor detection module to the connection member. 
     The rear cover may be engaged with the rear surface of the body, the connection member may be electrically connected to the connection port, and the controller may be configured to receive a signal corresponding to the electrical connection between the connection member and the connection port and to control an activation of a user module corresponding to the odor detection module. 
     The electronic device may further include a display. 
     The odor detection module may be further configured to, in response to external information being supplied to the odor detection module through the opening, sense the information, and the controller may be further configured to receive a value corresponding to the sensed information and control the display to display the received value. 
     The connection module may be further configured to wirelessly pair the body with the odor detection module and operates using at least one of Near Field Communication (NFC), Bluetooth, and ZigBee. 
     The connection module may be further configured to, when the rear cover is engaged with the rear surface of the body, pair the body with the odor detection module, and the controller may be further configured to receive a pairing signal from the connection module and control an activation of a user module corresponding to the odor detection module. 
     The electronic device may further include a battery disposed on the front cover and configured to supply power to the odor detection module. 
     The electronic device may further include: a display; and a scent-emitting cartridge provided in on the front cover, and configured to emit scents. 
     When the rear cover is engaged with the rear surface of the body, the scent-emitting cartridge may be connected to the body, and the controller may be further configured to control the scent-emitting cartridge according to information displayed on the display. 
     In accordance with an aspect of one or more exemplary embodiments, there is provided a cover device. The cover device includes: a rear cover configured to engage with a back surface of an electronic device; a front cover rotatably connected to the rear cover; and an odor detector mounted on the front cover, the odor detector being configured to sense information about an ambient environment, and to operate, when the rear cover is engaged with the back surface of the electronic device, under a control of the electronic device. 
     The cover device may further include a scent-emitting cartridge configured to emit scents, and to operate, when the rear cover is engaged with the back surface of the electronic device, under a control of the electronic device. 
     The cover device may further include a connector configured to, in response to the rear cover being engaged with the back surface of the electronic device, pair the odor detector with the electronic device. 
     The connector may be further configured to, in response to pairing the odor detector with the electronic device, transmit a notification to the electronic device. 
     The electronic device may be configured to, in response to receiving the notification, execute a user module and control the odor detector based on the user module. 
     The cover device may further include a connector configured to, in response to the rear cover being engaged with the back surface of the electronic device, pair the odor detector and the scent-emitting cartridge with the electronic device. 
     The connector may be further configured to, in response to pairing the odor detector and the scent-emitting cartridge with the electronic device, transmit a notification to the electronic device. 
     The electronic device may be configured to, in response to receiving the notification, execute a user module and control the odor detector and the scent-emitting cartridge based on the user module. 
     Other aspects, advantages, and salient features of one or more exemplary embodiments will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the accompanying drawings, discloses certain exemplary embodiments. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features and advantages of certain exemplary embodiments will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIGS. 1A and 1B  illustrate a cover device according to an exemplary embodiment; 
         FIGS. 2A and 2B  illustrate a cover device with a multi-porous member in an opening according to an exemplary embodiment; 
         FIGS. 3A, 3B, and 3C  illustrate an odor detection module that may be mounted on a front cover of a cover device according to various exemplary embodiments; 
         FIG. 4  is an exploded perspective view of the front cover according to the exemplary embodiment illustrated in  FIG. 3A ; 
         FIG. 5  illustrates a cover device having a cartridge mounted on a front cover according to an exemplary embodiment; 
         FIGS. 6A and 6B  illustrate an electronic device having a cover device according to an exemplary embodiment; 
         FIGS. 7A and 7B  are block diagrams of an electronic device having a cover device according to various exemplary embodiments; 
         FIGS. 8A and 8B  are block diagrams of an electronic device connected to a cover device according to various exemplary embodiments; 
         FIG. 9  illustrates connecting an electronic device to a cover device according to an exemplary embodiment; 
         FIG. 10  illustrates various structures for wired connections of an electronic device to a cover device according to various exemplary embodiments; 
         FIG. 11  illustrates a state of wired connection between a body and an odor detection module in an electronic device according to an exemplary embodiment; 
         FIG. 12  illustrates an inner surface of a cover device according to an exemplary embodiment; 
         FIGS. 13A and 13B  illustrate a cover device in which a power supply is separately provided to an odor detection module according to an exemplary embodiment; 
         FIG. 14  is a flowchart of an operation for driving an electronic device having a cover device according to an exemplary embodiment; and 
         FIG. 15  illustrates use states of an odor detection module in a cover device according to an exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     The following description with reference to the accompanying drawings is provided to assist in an understanding of various exemplary embodiments as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skilled in the art will recognize that various changes and modifications to the corresponding embodiments In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are merely used to enable a clear and consistent understanding of embodiments and should not be considered limiting. It should be apparent to those skilled in the art that the following description of exemplary embodiments is provided for illustrative purposes only, and should not be construed as limiting the claims and their equivalents. 
     It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
     Further, throughout the drawings, like reference numerals will be understood to refer to like parts, components, and structures. 
     By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide. 
     An electronic device according to one or more exemplary embodiments may be any of a terminal, a portable terminal, a mobile terminal, a communication terminal, a portable communication terminal, a portable mobile terminal, and a display device. 
     For example, the electronic device may be at least one of a smart phone, a portable phone, a navigation device, a game console, a Television (TV), an in-vehicle head unit, a laptop computer, a tablet computer, a Portable Multimedia Player (PMP), and a Personal Digital Assistant (PDA). The electronic device may be a pocket-size portable communication terminal having wireless communication functionality. 
     The electronic device may be a flexible device or a flexible display device. 
     Now, a description will be given of a cover device and an electronic device having the cover device according to various exemplary embodiments. 
       FIGS. 1A and 1B  illustrate a cover device according to an exemplary embodiment. 
     Referring to  FIG. 1A , a cover device  200  may include a rear cover  210  and a front cover  220  having an odor detection module  300 , i.e., an odor detection device, an odor detector, an odor detecting module, or an odor detecting device, mounted on it. The cover device  200  may further include a connection module, i.e., a connector, for electrically connecting the odor detection module  300  to a body  100  of an electronic device by pairing, when the cover device  200  is engaged with the electronic device. The cover device  200  may be a flip cover. 
     The front cover  220  may be rotatably connected to the rear cover  210  and may cover a front surface of the body  100 . The odor detection module  300  is mounted on an outer surface of the front cover  220 , exposed outward. The front cover  220  is provided with an opening  250  in which the odor detection module  300  is mounted and which is opened so that information about an ambient environment may be detected by the odor detection module  300 . 
     As illustrated in  FIG. 1B , the opening  250  may include a plurality of porous holes  251  through which information about an ambient environment may be introduced to the odor detection module  300  mounted in the opening  250 . For example, ambient air may be able to interact with the odor detection module  300  through the porous holes  251 . However, this is merely an example. 
       FIGS. 2A and 2B  illustrate a cover device with a multi-porous member in an opening an according to an exemplary embodiment. 
     The cover device  200  illustrated in  FIGS. 2A and 2B  may be similar to the cover device  200  illustrated in  FIGS. 1A and 1B . The opening  250  may be shaped into a recess opened from the front surface of the front cover  220  and a multi-porous member  400  may be mounted in the opening  250 . 
     Referring to  FIG. 2B , the opening  250  may be provided on the front surface of the front cover  220 , and the odor detection module  300  and the multi-porous member  400  may be sequentially stacked in the opening  250 . 
     The opening  250  may include a rear recess  251   a  and a front recess  251   b  and may be opened from the front surface of the front cover  220 . The rear recess  251   a  may be formed in a size and shape corresponding to a size and shape of the odor detection module  300 , so that the odor detection module  300  may be detachably mounted in the rear recess  251   a . The front recess  251   b  may be formed in a larger size than the rear recess  251   a  and thus stepped up to the rear recess  251   a . The multi-porous member  400  may be mounted in the rear recess  251   a  to allow the collection of ambient environment information by the odor detection module  300 . While the rear recess  251   a  and the front recess  251   b  are described as stepped, the opening  250  is not limited to specific shapes and sizes. For example, if the odor detection module  300  is formed in a smaller size than the multi-porous member  400 , the rear recess  251   a  may be formed in a smaller size than the front recess  251   b . However, if the odor detection module  300  and the multi-porous member  400  are of the same size, the rear recess  251   a  and the front recess  251   b  may be formed in the same size. 
     Further, when the cover device  200  is engaged with the body  100 , the odor detection module  300  may be electrically connected to the body  100  through a wired structure through a connection surface  610  formed in the rear recess  251   a  ( FIGS. 10-12 ). The connection surface  610  may be connected to connection members  630 {circle around ( 1 )},  630 {circle around ( 2 )},  630 {circle around ( 3 )}, and  630 {circle around ( 4 )} via connection lines  620 {circle around ( 1 )},  620 {circle around ( 2 )},  620 {circle around ( 3 )}, and  620 {circle around ( 4 )}. The connection members  630 {circle around ( 1 )},  630 {circle around ( 2 )},  630 {circle around ( 3 )}, and  630 {circle around ( 4 )} may be electrically engaged with connection terminals  640 {circle around ( 1 )},  640 {circle around ( 2 )},  640 {circle around ( 3 )}, and  640 {circle around ( 4 )} of the body  100  so that a signal value detected by the odor detection module  300  may be applied to the body  100 . 
       FIGS. 3A, 3B, and 3C  illustrate an odor detection module that may be mounted on a front cover of a cover device according to various exemplary embodiments, and  FIG. 4  is an exploded perspective view of the front cover according to the exemplary embodiment illustrated in  FIG. 3A . 
     According to embodiments, various shapes are available for the front cover  220  for accommodating the odor detection module  300 . 
     Referring to  FIGS. 3A and 4 , the front cover  220  may include a first member  221  and a second member  222 . The odor detection module  300  may be mounted between the first member  221  and the second member  222 . The first member  221  serves as the front surface of the front cover  220 . The opening  250  having the porous holes  251  or the multi-porous member  400  may be formed in the first member  221 . According to an exemplary embodiment, the opening  250  is a penetrating hole and the multi-porous member  400  is fit into the opening  250 . 
     The second member  222  is provided on one surface of the first member  221 , to serve as an inner surface of the front cover  220 , facing a display  120  formed on the front surface of the body  100 . 
     The odor detection module  300  may be mounted between the first member  221  and the second member  222  on the rear surface of the opening  250  of the first member  221 . 
     Referring to  FIG. 3B , the opening  250  may penetrate through the inner and outer surfaces of the front cover  220 , and an engagement member  500  may be provided on the rear surface of the opening  250  to ensure engagement of the odor detection module  300  and prevent interference between the odor detection module  300  and the display  120  of the body  100 . The porous holes  251  or the multi-porous member  400  may be provided in the opening  250 . According to an exemplary embodiment, the opening  250  is a penetrating hole and the multi-porous member  400  is fit in the opening  250 . The odor detection module  300  may be mounted on the rear surface  250  of the opening  250 , that is, on the inner surface of the front cover  220 . The engagement member  500  is provided to stably engage the odor detection module  300  with the inner surface of the front cover  220  and prevent interference between the odor detection module  300  protruding from the inner surface of the front cover  220  and the display  120  formed on the front surface of the body  100 . 
     Referring to  FIG. 3C , the opening  250  may be a recess opened from the front surface of the front cover  220 . The odor detection module  300  may be mounted in the opening  250 . The opening  250  may have a size and shape that enables a mounting of the odor detection module  300 . The multi-porous member  400  may be engaged with the front surface of the front cover  220  along the periphery of the opening  250 , to cover the opening  250 . 
     As illustrated with reference to  FIGS. 3A to 4 , many modifications or variations may be made to the shape, structure, or configuration of the front cover  220  for mounting the odor detection module  300 , taking into account the design of the front cover  220  and easy mounting and assembly of the odor detection module  300 . 
     As the odor detection module  300  is exposed to the outside through the opening  250 , the odor detection module  300  may sense information about an ambient environment. The odor detection module  300  may include a Gas/Volatile Organic Compound (VOC) sensor. Since the odor detection module  300  is provided on the front cover  220 , there is no need for separately carrying an odor detection module  300 . When the cover device  200  is engaged with the electronic device, the odor detection module  300  may be paired with the electronic device through wires and/or wirelessly, to thereby sense scent, odor, temperature, humidity, or other ambient air conditions in an ambient environment. 
     As illustrated in  FIG. 15 , the odor detection module  300  may sense information about the ambient environment, sense or reproduce scent based on the sensed information, search for information, provide information such as environment safety information, verify food safety, and provide health care information according to the ambient environment information. 
       FIG. 5  illustrates a cover device having a cartridge mounted on a front cover according to an exemplary embodiment. 
     Referring to  FIG. 5 , a cartridge  800  may be provided in the vicinity of the odor detection module  300  behind the front cover  220  in order to emit scent. An additional opening  260  (hereinafter, referred to as a second opening  260 ) may be formed in the front cover  220 , for detachably accommodating the cartridge  800 . 
     A plurality of porous holes  261  may be formed into the front surface of the front cover  220  in the second opening  260  and a mounting space of the cartridge  800  may be formed in the porous holes  261 . When the rear cover  210  is engaged with the rear surface of the body  100  of the electronic device, the cartridge  800  may be paired with the body  100  and may be electrically connected to the odor detection module  300 . The cartridge  800  may include one or more of a scent ample, a scent sponge, and a scent capsule. When the cover device  200  is engaged with the electronic device, the cartridge  800  may be set to an active state so that it may operate. Accordingly, the controller  170  may provide information related to scent corresponding to information displayed on the display  120  and control the cartridge  800  according to the displayed information. 
       FIGS. 6A and 6B  illustrate an electronic device having a cover device according to one an exemplary embodiment, and  FIGS. 7A and 7B  are block diagrams of an electronic device having a cover device according to various exemplary embodiments. 
     Referring to  FIGS. 6A, 6B, and 7A , an electronic device having the cover device  200  according to an exemplary embodiment may include the body  100  and the cover device  200  that covers the front and rear surfaces of the body  100  and has the odor detection module  300  mounted in it. Various parts for executing multi-functions of the electronic device, such as a circuit board for driving the various parts, a battery  150  for supplying power ( FIG. 10 ), and the controller  170  for controlling the electronic device, may be included in the body  100 . 
     The body  100  may be a structure such as a smartphone, a portable phone, a navigation device, a game console, a TV, a vehicle-mounted head unit, a laptop computer, a tablet computer, a PMP, or a PDA. 
     The body  100  may have a rectangular shape, but this is merely an example. The display  120  may be provided on a front surface of the body  100 , so that a user may view a screen and enter an input. A rear case  115  having a mounting space for the battery  150  may be engaged with the rear surface of the body  100 . 
     When the cover device  200  is engaged with the body  100 , the controller  170  may recognize the engagement and control an activation of a user module corresponding to the odor detection module  300  along with the engagement of the odor detection module  300  so that the user module may be operated. The controller  170  may control the display  120  to display information corresponding to a signal value sensed by the odor detection module  300 . 
     Referring to  FIG. 7B , if the cartridge  800  is provided on the front cover  220  along with the odor detection module  300 , the controller  170  may control the cartridge  800  based on scent-related information included in information displayed on the display  120 . For example, the controller  170  may control the cartridge to emit a scent corresponding to scent-related information displayed on the display  120 , or in accordance with a user command. 
     Connection modules, i.e., connectors, may be provided in the body  100  of the electronic device and the cover device  200 . The odor detection module  300  may be electrically connected to the body  100  (refer to  FIGS. 8A to 12 ). The connection modules may be provided so that when the rear cover  210  is engaged with the rear surface of the body  100  of the electronic device, the odor detection module  300  may be paired with the body  100  through the connection modules. 
     The connection modules will be described below in greater detail with reference to  FIGS. 8A to 12 . 
       FIGS. 8A and 8B  are block diagrams of an electronic device connected to a cover device according to various exemplary embodiments, and  FIG. 9  illustrates connecting an electronic device to a cover device according to an exemplary embodiment. 
     Referring to  FIGS. 8A, 8B, and 9 , the body  100  may include a Bluetooth module  652   a , a Near Field Communication (NFC) module  652   b , or a wireless communication module, such as a Zigbee module to enable wireless transmission and reception between the electronic device and an external device (the cover device  200  having the odor detection module  300  in an embodiment). The Bluetooth module  652   a , Near Field Communication (NFC) module  652   b , and wireless communication module may include a Bluetooth chip, a NFC chip, or a wireless communication chip, respectively. The cover device  200  may be provided with a Bluetooth module  651   a , an NFC module  651   b , or a wireless communication module near the odor detection module  300  on the front cover  220 . The Bluetooth module  652   a , the NFC module  652   b , and the wireless communication module may pair with the Bluetooth module  652   a , Near Field Communication (NFC) module  652   b , or wireless communication module of the body  200 , respectively. If the above wireless communication modules are activated, a detection value from the odor detection module  300  may be supplied to the controller  170  by wireless pairing between the wireless communication modules. 
       FIG. 10  various structures for wired connections of an electronic device to a cover device according to various exemplary embodiments,  FIG. 11  illustrates a state of wired connection between a body and an odor detection module in an electronic device according to an exemplary embodiment, and  FIG. 12  illustrates an inner surface of a cover device according to an exemplary embodiment. 
     Referring to  FIGS. 10, 11, and 12 , various structures for electrically connecting the cover device to the body of the electronic device in a wired manner are described. 
     Four connection terminals  640 {circle around ( 1 )},  640 {circle around ( 2 )},  640 {circle around ( 3 )}, and  640 {circle around ( 4 )} may be provided on a rear surface of the body of the electronic device. For example, the connection terminal  640 {circle around ( 1 )} is connected near a Universal Serial Bus (USB) connection port  111  of the body  100 , the connection terminal  640 {circle around ( 2 )} is connected near a micro Secure Digital (SD) connection port  112  on the rear surface of the body  100 , the connection port  640 {circle around ( 3 )} is connected near an ear-jack connection port  113 , and the connection terminal  640 {circle around ( 4 )} is provided separately from connection terminals on the rear surface of the body  100 . While four connection modules labeled by {circle around ( 1 )} to {circle around ( 4 )} are shown as provided on the rear surface of the cover device  200  and the body  100 , this is merely an example, and one or more connection modules may be provided in the body. 
     The connection terminal  640 {circle around ( 1 )} (hereinafter, referred to as the first terminal  640 {circle around ( 1 )}) may extend from the USB connection port  111  at a predetermined position of the body  100 , which will be connected to an external power source or a data cable, exposed on a surface of the rear case  115 . The connection member  630 {circle around ( 1 )} may be provided in correspondence with the position of the first terminal  640 {circle around ( 1 )} on the inner surface of the rear cover  210 . The connection line  620 {circle around ( 1 )} may be provided to connect the odor detection module  300  provided on the front cover  220  to the first terminal  640 {circle around ( 1 )} provided on the rear cover  210  through the connection member  630 {circle around ( 1 )}. When the rear cover  210  is engaged with the rear surface of the body  100 , covering the rear case  115  of the body  100 , the connection member  630 {circle around ( 1 )} of the rear cover  210  contacts the first terminal  640 {circle around ( 1 )} exposed on the surface of the rear case  115 . Accordingly, the odor detection module  300  may be driven in electrical connection with the body  100 . 
     When the connection member  630 {circle around ( 1 )} is electrically connected to the first terminal  640 {circle around ( 1 )}, a signal generated upon the engagement between the connection member  630 {circle around ( 1 )} and the first terminal  640 {circle around ( 1 )} may be supplied to the controller  170 . The controller  170  may control an activation of the odor detection module  300  in response to receiving the connection signal. The controller  170  may control an operation of the odor detection module  300  based on a user module corresponding to the odor detection module  300 . 
     The connection terminal  640 {circle around ( 2 )} (hereinafter, referred to as the second terminal  640 {circle around ( 2 )}) may extend from the micro SD connection port  112  at one portion of the rear case  115 , exposed on the surface of the rear case  115 . The connection member  630 {circle around ( 2 )} may be provided in correspondence with the position of the second terminal  640 {circle around ( 2 )} on the inner surface of the rear cover  210 . When the rear cover  210  is engaged with the rear surface of the body  100 , covering the rear case  115  of the body  100 , the connection member  630 {circle around ( 2 )} of the rear cover  210  contacts the second terminal  640 {circle around ( 2 )} exposed on the surface of the rear case  115 . Accordingly, the odor detection module  300  may be driven in electrical connection with the body  100 . 
     When the connection member  630 {circle around ( 2 )} is electrically connected to the second terminal  640 {circle around ( 2 )}, a signal generated upon the engagement between the connection member  630 {circle around ( 2 )} and the second terminal  640 {circle around ( 2 )} may be supplied to the controller  170 . The controller  170  may control an activation and operation of the odor detection module  300 . 
     The connection terminal  640 {circle around ( 3 )} (hereinafter, referred to as the third terminal  640 {circle around ( 3 )}) may extend from the connection port  113  of an external device, such as an ear jack, provided at one portion of the body  100 , exposed on the surface of the rear case  115 . The connection member  630 {circle around ( 3 )} may be provided in correspondence with the position of the third terminal  640 {circle around ( 3 )} on the inner surface of the rear cover  210 . The connection line  620 {circle around ( 3 )} may be provided to connect the odor detection module  300  provided on the front cover  220  to the third terminal  640 {circle around ( 3 )} provided on the rear cover  210 . When the rear cover  210  is engaged with the rear surface of the body  100 , covering the rear case  115  of the body  100 , the connection member  630 {circle around ( 3 )} of the rear cover  210  contacts the third terminal  640 {circle around ( 3 )} exposed a the surface of the rear case  115 . Accordingly, the odor detection module  300  may be driven in electrical connection with the body  100 . 
     When the connection member  630 {circle around ( 3 )} is electrically connected to the third terminal  640 {circle around ( 3 )}, a signal generated upon the engagement between the connection member  630 {circle around ( 3 )} and the third terminal  640 {circle around ( 3 )} may be supplied to the controller  170 , and the controller  170  may control an activation of the odor detection module  300 . 
     The connection terminal  640 {circle around ( 4 )} (hereinafter, referred to as the fourth terminal  640 {circle around ( 4 )}) may be provided separately from the USB connection port  111 , the USD connection port  112 , or the ear jack connection port  113 . The connection member  630 {circle around ( 4 )} may be provided in correspondence with the position of the fourth terminal  640 {circle around ( 4 )} on the inner surface of the rear cover  210 . The connection line  620 {circle around ( 4 )} may be provided to electrically connect the odor detection module  300  provided on the front cover  220  to the fourth terminal  640 {circle around ( 4 )} provided on the rear cover  210 . When the rear cover  210  is engaged with the rear surface of the body  100 , covering the rear case  115  of the body  100 , the connection member  630 {circle around ( 4 )} of the rear cover  210  contacts the fourth terminal  640 {circle around ( 4 )} exposed on the surface of the rear case  115 . Accordingly, the odor detection module  300  may be driven in electrical connection with the body  100 . 
     When the connection member  630 {circle around ( 4 )} is electrically engaged with the fourth terminal  640 {circle around ( 4 )}, a signal generated upon the engagement between the connection member  630  {circle around ( 4 )} and the fourth terminal  640 {circle around ( 4 )} may be supplied to the controller  170 , and the controller  170  may control an activation and operation of the odor detection module  300 . 
     The electronic device having the cover device  200  according to various exemplary embodiments is configured so that when the cover device  200  is engaged with the electronic device, the odor detection module  300  is connected to the body  100  either through wires or wirelessly and driven by power from the electronic device. However, power supply to the odor detection module is not limited to power from the electronic device. 
       FIGS. 13A and 13B  illustrate a cover device in which a power supply is separately provided to an odor detection module according to an exemplary embodiment. 
     Referring to  FIGS. 13A and 13B , the front cover  220  may include a power supply  700  for separately supplying power to the odor detection module  300 . That is, the power supply  700  is electrically connected to the odor detection module  300  and supplies operational power to the odor detection module  300 . In the foregoing exemplary embodiments, the odor detection module  300  uses power from the electronic device. The use of the odor detection module  300  may lead to fast depletion of the battery  150  of the electronic device, especially in comparison with operating without the odor detection module  300 . However, the power consumption of the battery  150  of the electronic device may be minimized by separately providing a power supply  700  for operating the odor detection module  300 . 
       FIG. 14  is a flowchart of an operation for driving an electronic device having a cover device according to an exemplary embodiment. 
     Referring to  FIG. 14 , when the rear cover  210  is engaged with the rear case  115  of the body  100 , covering the rear case  115 , the rear cover  210  may be paired with and connected to the rear case  115 . The controller  170  recognizes that the rear cover  210  with the odor detection module  300  has covered the rear surface of the body  100  and controls an activation of a user setting for the odor detection module  300 . 
     Once the user activates the user setting for the odor detection module  300 , the odor detection module  300  is operated and detects information about an ambient environment of the electronic device having the cover device  200  (S 10 ). That is, the odor detection module  300  may detect scent, humidity, temperature, and an amount of fine dust in the air. The odor detection module  300  provides a detected value to the controller  170 . The controller  170  executes a mode according to the detected value provided by the odor detection module  300  (S 20 ). The controller  170  controls the display  120  to display ambient environment information according to the detected information (S 30 ). For example, if the odor detection module  300  detects the scent of an orange, odor detection module  300  may provide a detected value about the orange to the controller  170 , and the controller  170  may display information related to the orange, such as information about when oranges are in season, prices of oranges, a regions that grow oranges, and how the orange is fresh, on the display  120 . 
     Since an odor detection module is provided on the front surface of a cover device, the odor detection module can be miniaturized and, even though the cover device having the odor detection module is provided in an electronic device, the overall size of the electronic device can be minimized. 
     Since the odor detection device is provided in the cover device, the odor detection device can be connected to the electronic device just by connecting the cover device to the electronic device. Therefore, the portability, aesthetics, and durability of the electronic device can be maintained or enhanced. 
     Further, as the cover device is engaged with the rear surface of the electronic device and the odor detection device is also connected to the electronic device through the rear surface, a connection device is not externally exposed outward and a connection between the odor detection device and the electronic device can be facilitated. Compared to a conventional odor detector that protrudes at a power/data connection port or an ear-jack connection port of an electronic device and thus is vulnerable to breakage due to frequent connection or impact, one or more exemplary embodiments can reduce the risk of breakage caused by impact or frequent connection and ensure stable connection because the odor detection device is connected to the electronic device by the engagement between the cover device and the rear surface of the electronic device. 
     When the cover device having the odor detection device is connected to the electronic device, the odor detection device can be activated. As the odor detection device is exposed outwardly from the cover device, the odor detection device can detect accurate data corresponding to the ambient environment (odor, scent, humidity, and temperature), thereby increasing data reliability. 
     Also, as a scent-emitting cartridge is electrically connected to the cover device having the odor detection device, a scent based on contents of the electronic device, for example, the scent of a rose displayed on the display of the electronic device can be provided to a user by emissions from the scent-emitting cartridge. 
     While the disclosure has been shown and described with reference to certain exemplary embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the claims and their equivalents.