Abstract:
An apparatus for projecting an image, according to one embodiment of the present invention, projects an image, detects a user gesture operation in an area between an image screen area, where an image screen corresponding to the projected image is displayed, and the apparatus for projecting an image, and carries out a control operation corresponding to the detected gesture operation. The operation of detecting the user gesture operation includes distinguishing, into a plurality of areas, the area between the image screen area and the apparatus for projecting an image, and detecting the user gesture operation with respect to the plurality of distinguished plurality of areas.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
       [0001]    The present invention relates to an image projection apparatus and a method of operating the same and, more particularly to an image projection apparatus for sensing a user gesture related to a projected image and performing operation corresponding to the sensed user gesture, and a method of operating the same. 
       2. Description of the Related Art 
       [0002]    Recently, a method of displaying an image includes a method of displaying an image through a display apparatus and a method of displaying an image through an image projection apparatus such as a projector. 
         [0003]    Upon displaying an image through a display apparatus, there is a limit on screen size and an image should be displayed only on the screen of the display apparatus. 
         [0004]    In contrast, an image projection apparatus such as a projector can provide a greater screen size than that of the display apparatus and can display an image at various positions according to image projection direction. 
         [0005]    However, in the image projection apparatus, the size and quality of a displayed image may be significantly changed according to a distance and angle between an image projection place and the image projection apparatus. Therefore, it is necessary to appropriately adjust the quality of the image projected by the image projection apparatus according to the distance between the image projection place and the image projection apparatus. 
         [0006]    Recently, a touch type input method of enabling a user to directly touch a screen of a display apparatus using various touch methods is widely used. In the touch type input method, since a user can directly touch a displayed screen, the user can intuitively recognize an input method and a use method. However, an image projection apparatus does not have a display and thus cannot receive user input using a touch method. 
       SUMMARY OF THE INVENTION 
       [0007]    An object of the present invention is to project an image corresponding to a distance to an image projection place to provide a high-quality image to a user. 
         [0008]    In addition, another object of the present invention is to recognize a user gesture related to a projected screen to perform control operation of a projected image. 
         [0009]    According to an aspect of the present invention, there is a method of operating an image projection apparatus including projecting an image, sensing a user gesture in an area between an image screen area, in which an image screen corresponding to the projected image is displayed, and the image projection apparatus, and performing control operation corresponding to the sensed gesture. 
         [0010]    According to another aspect of the present invention, there is an image projection apparatus including an image projection unit configured to project an image, a sensing unit configured to sense a user gesture in an area between an image screen area, in which an image screen corresponding to the projected image is displayed, and the image projection apparatus, and a controller configured to perform control operation corresponding to the user gesture sensed by the sensing unit. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]      FIG. 1  is a block diagram showing the configuration of an image projection apparatus according to an embodiment of the present invention. 
           [0012]      FIG. 2  is a diagram showing the concept of image projection according to an embodiment of the present invention. 
           [0013]      FIG. 3  is a diagram showing the concept of image projection according to another embodiment of the present invention. 
           [0014]      FIG. 4  is a block diagram showing a terminal according to an embodiment of the present invention. 
           [0015]      FIG. 5  is a flowchart illustrating a method of operating an image projection apparatus according to an embodiment of the present invention. 
           [0016]      FIG. 6  is a diagram showing image projection according to an embodiment of the present invention. 
           [0017]      FIG. 7  is a diagram showing image projection according to another embodiment of the present invention. 
           [0018]      FIG. 8  is a diagram showing display of a connected terminal according to an embodiment of the present invention. 
           [0019]      FIG. 9  is a diagram showing an image screen upon an incoming call according to an embodiment of the present invention. 
           [0020]      FIG. 10  is a user gesture area according to an embodiment of the present invention. 
           [0021]      FIG. 11  is a diagram showing a first gesture area according to an embodiment of the present invention. 
           [0022]      FIG. 12  is a diagram showing a menu display screen according to an embodiment of the present invention. 
           [0023]      FIG. 13  is a diagram showing user input for a menu display screen according to an embodiment of the present invention. 
           [0024]      FIG. 14  is a diagram showing a volume control screen according to an embodiment of the present invention. 
           [0025]      FIG. 15  is a diagram showing user input for a volume control screen according to an embodiment of the present invention. 
           [0026]      FIG. 16  is a diagram showing a second gesture area according to an embodiment of the present invention. 
           [0027]      FIG. 17  is a diagram showing user gesture input according to an embodiment of the present invention. 
           [0028]      FIG. 18  is a diagram showing user input in the second gesture area according to an embodiment of the present invention. 
           [0029]      FIG. 19  is a diagram showing user gesture input according to another embodiment of the present invention. 
           [0030]      FIG. 20  is a diagram showing user input in the second gesture area according to another embodiment of the present invention. 
           [0031]      FIG. 21  is a diagram showing an entire channel list display screen according to an embodiment of the present invention. 
           [0032]      FIG. 22  is a diagram showing user input in the second gesture area according to another embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0033]    Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The suffixes “module” and “unit” in elements used in description below are given only in consideration of ease in preparation of the specification and do not have specific meanings or functions. Therefore, the suffixes “module” and “unit” may be used interchangeably. 
         [0034]    Hereinafter, a method of operating an image projection apparatus and an image projection apparatus using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
         [0035]    The image projection apparatus according to the embodiment of the present invention is, for example, an intelligent image projection apparatus having a broadcast reception function and a computer supporting function. The image projection apparatus further includes an Internet function in addition to a broadcast reception function and has a convenient interface, such as a voice recognition, gesture recognition or handwriting input device, a touch screen or a pointing device. The image projection apparatus may be connected to the Internet and a computer through a wired or wireless Internet function to perform e-mail, web browsing, banking and gaming. A general-purpose OS may be used for various functions. 
         [0036]    Accordingly, the image projection apparatus described in the present invention may perform various user-friendly functions, because various applications are freely added to or deleted from a general-purpose OS. The image projection apparatus may be an image projector, for example, and is applicable to a smartphone in some cases. 
         [0037]      FIG. 1  is a block diagram showing the configuration of an image projection apparatus according to an embodiment of the present invention. 
         [0038]    Referring to  FIG. 1 , the image projection apparatus  100  may include a sensing unit  105 , a voice acquisition unit  110 , an image acquisition unit  120 , a broadcast reception unit  130 , an external device interface  135 , a memory  140 , a user input interface  150 , a communication unit  160 , a controller  170 , an image projection unit  180 , an audio output unit  185  and a power supply  190 . 
         [0039]    The sensing unit  105  may include one or more sensors for sensing at least one of internal information of the image projection apparatus, peripheral environment information of the image projection apparatus and user information. For example, the sensing unit  105  may include at least one of a distance sensor  106 , a proximity sensor, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, a gravity sensor, a gyroscope sensor, a motion sensor  107 , an RGB sensor, an infrared (IR) sensor, a fingerprint sensor, an ultrasonic sensor, an optical sensor, a battery gauge, an environment sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation sensor, a heat sensor, a gas sensor, etc.) and a chemical sensor (e.g., e-nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the image projection apparatus  100  disclosed in the present specification may use a combination of information sensed by at least two of the sensors. 
         [0040]    The voice acquisition unit  110  may acquire voice. 
         [0041]    The voice acquisition unit  110  may include at least one microphone and acquire voice through the microphone. 
         [0042]    The voice acquisition unit  110  may deliver the acquired voice to the controller  170 . 
         [0043]    The image acquisition unit  120  may acquire an image. 
         [0044]    The image acquisition unit  120  may include at least one camera and may acquire an image through the camera. The image acquisition unit  120  may acquire the image of a user. In addition, the image acquisition unit  120  may acquire the biometric information such as an image of the iris or veins of the user. 
         [0045]    The image acquisition unit  120  may deliver the acquired information to the controller  170 . 
         [0046]    The voice acquisition unit  110  and the image acquisition unit  120  may be included in the user input interface  150 . 
         [0047]    Meanwhile, the broadcast reception unit  130  may include a tuner  131 , a demodulator  132  and a network interface  133 . 
         [0048]    The external device interface  135  may receive and deliver an application or an application list in an adjacent external device to the controller  170  or the memory  140 . 
         [0049]    The external device interface  135  may include a terminal for connection with an external device and may be connected to a connector of the external device. 
         [0050]    The external device interface  135  may supply power received from the power supply  190  to the connected external device as driving power. 
         [0051]    In addition, the external device interface  135  may deliver an operation signal received from the external device to the controller  170 . 
         [0052]    Meanwhile, the external device interface  135  may include a sensor for sensing connection with the external device and may recognize connection with the external device. 
         [0053]    The network interface  133  may provide an interface for connecting the image projection apparatus  100  to a wired/wireless network including an Internet. The network interface  133  may transmit or receive data to or from another user or another electronic apparatus through a connected network or another network linked to the connected network. 
         [0054]    In addition, some content stored in the image projection apparatus  100  may be transmitted to a selected user or a selected electronic apparatus among other users or other electronic apparatuses pre-registered with the image projection apparatus  100 . 
         [0055]    The network interface  133  may access a predetermined webpage through a connected network or another network linked to the connected network. That is, the network interface may access the predetermined webpage through the network to transmit or receive data to or from the server. 
         [0056]    The network interface  133  may receive content or data provided by a content provider or a network operator. That is, the network interface  133  may receive content such as movies, advertisements, games, VOD, broadcast signals, etc. and information related thereto from the content provider or the network provider through the network. 
         [0057]    In addition, the network interface  133  may receive update information and update files of firmware provided by the network operator and transmit data to the Internet, the content provider or the network operator. 
         [0058]    The network interface  133  may select and receive a desired application of applications open to the public through the network. 
         [0059]    The memory  140  may store programs for signal processing and control of the controller  170  and store video, audio or data signals subjected to signal processing. 
         [0060]    In addition, the memory  140  may temporarily store video, audio or data signals received from the external device interface  135  or the network interface  133  or store information on a predetermined image through a channel storage function. 
         [0061]    The memory  140  may store an application or an application list received from the external device interface  135  or the network interface  133 . 
         [0062]    In addition, the memory  140  may store biometric information of a user. Here, the biometric information of the user may include unique information related to the body of the user, such as fingerprint, iris, face or voice of the user. 
         [0063]    The image projection apparatus  100  may reproduce and provide a content file (a moving image file, a still image file, a music file, a document file, an application file, etc.) stored in the memory  140  to the user. 
         [0064]    The memory  140  may store personalized service information of the user. Here, the personalized service information of the user may include at least one of functions frequently used by the user, channels frequently viewed by the user and setting values set by the user. The personalized service information of the user may include information on personalized functions and personalized menus of a plurality of users. 
         [0065]    The user input interface  150  may deliver a signal input by the user to the controller  170  or deliver a signal from the controller  170  to the user. For example, the user input interface  150  may receive and process control signals such as power on/off, channel selection and screen settings from the remote control device  300  or transmit and process a control signal from the controller  170  to the remote control device  300 , according to various communication methods such as Bluetooth, Ultra Wideband (UWB), ZigBee, radio frequency (RF) communication or infrared (IR) communication. 
         [0066]    In addition, the user input interface  150  may deliver a control signal received through a local key such as a power key, a channel key, a volume key or a setting key to the controller  170 . 
         [0067]    The communication unit  160  may include one or more modules enabling wired or wireless communication between the image projection apparatus  100  and the network or between the image projection apparatus  100  and a peripheral device. Here, the peripheral device may include one or more of the below-described terminal  200  and the remote control device  300 . 
         [0068]    For example, the communication unit  160  may include an Internet module for Internet access and enable the image projection apparatus  100  to access the Internet through the Internet module by wire or wirelessly. 
         [0069]    As another example, the communication unit  160  may include a short-range communication module for enabling the image projection apparatus  100  to wirelessly communicate with another device. As one embodiment, the short-range communication module included in the communication unit  160  may include Bluetooth, Radio Frequency IDentification (RFID), Infrared Data Association (IrDA), Ultra-WideBand (UWB), ZigBee, wireless LAN (WLAN) (Wi-Fi), Near Field Communication (NFC), etc. The other device may be the below-described terminal  200 . 
         [0070]    The video signal processed by the controller  170  may be input to the image projection unit  180  to display video corresponding to the video signal. In addition, the video signal processed by the controller  170  may be input to an external output device through the external device interface  135 . 
         [0071]    The audio signal processed by the controller  170  may be input to the audio output unit  185  to output audio. In addition, the audio signal processed by the controller  170  may be input to an external device through the external device interface  135 . 
         [0072]    The controller  170  may control the overall operation of the image projection apparatus  100 . 
         [0073]    The controller  170  may receive a sense signal for connection of an external device from the external device interface and control the power supply  190  to deliver driving power to the connected external device through the external device interface  135 . 
         [0074]    In addition, the controller  170  may recognize voice acquired through the voice acquisition unit  110  and perform control operation corresponding to the recognized voice. 
         [0075]    In addition, the controller  170  may compare a plurality of voice signals corresponding to the voice of the user, recognize a voice signal having best quality and perform control operation corresponding to the recognized voice. 
         [0076]    The controller  170  may compare a plurality of voices acquired by the voice acquisition unit  110  having a plurality of microphones and determine the location of the user. More specifically, the controller  170  may compare voices acquired by the plurality of microphones and determine the location of the user who has spoken. 
         [0077]    Meanwhile, the controller  170  may control the image projection apparatus  100  using a user command input through the user input interface  150  or an internal program and access the network to download an application or application list desired by the user to the image projection apparatus  100 . 
         [0078]    The controller  170  may output channel information selected by the user through the image projection unit  180  or the audio output unit  185  along with the processed video or audio signal. 
         [0079]    In addition, the controller  170  may output, through the image projection unit  180  or the audio output unit  185 , the video signal or the audio signal received from an external device, for example, the camera or the camcorder through the external device interface  135 , according to an external device image reproduction command received through the user input interface  150 . 
         [0080]    Meanwhile, the controller  170  may control the image projection unit  180  to display an image and to project a broadcast image received through the tuner  131 , an external input image received through the external device interface  135 , an image received through the network interface or an image stored in the memory  140 . In this case, the image projected by the image projection unit  180  may be a still image or a moving image and may be a 2D image or a 3D image. 
         [0081]    In addition, the controller  170  may perform control to project content stored in the image projection apparatus  100 , received broadcast content or external input content. The content may be a broadcast image, an external input image, an audio file, a still image, an accessed webpage and a document file. 
         [0082]    In addition, the controller  170  may compare one or more of the input biometric information and pattern information of the user with one or more of the pre-stored biometric information and pattern information. The controller  170  may retrieve the same biometric information as the user from one or more of the pre-stored biometric information and pattern information. 
         [0083]    In addition, the controller  170  may acquire personalized service information of the user corresponding to one or more of the biometric information and pattern information input based on one or more of the input biometric information and pattern information of the user. For example, the controller  180  may recognize the user based on the received fingerprint image or fingerprint information of the user. The controller  180  may acquire personalized service information corresponding to the recognized user. 
         [0084]    In addition, the controller  170  may adjust an image to be projected based on a distance to an image projection place. 
         [0085]    The image projection unit  180  may project various images. 
         [0086]    The image projection unit  180  may include a light source unit  181 , a lens unit  182  and a reflection unit  183 . 
         [0087]    The light source unit  181  emits a beam. 
         [0088]    The lens unit  182  selectively transmits only a predetermined wavelength of the beam generated by the light source unit  181 . 
         [0089]    The reflection unit  183  reflects the beam transmitted by the lens unit  182 . In addition, the reflection unit  183  may rotate in all directions and reflect the transmitted beam in various directions. 
         [0090]    The image projection unit  180  may project the beam emitted from the light source unit  181  onto an image projection place through the lens unit  182 . 
         [0091]    In addition, in the image projection unit  180 , the beam emitted from the light source unit  181  may pass through the lens unit  182  and reflect off of the reflection unit  183  to project an image onto a projection place. 
         [0092]    This will be described with reference to  FIGS. 2 and 3 . 
         [0093]      FIG. 2  is a diagram showing the concept of image projection according to an embodiment of the present invention. 
         [0094]    Referring to  FIG. 2 , in the image projection unit  180 , the beam emitted from the light source unit  181  may pass through the lens unit  182  and reflect off of the reflection unit  183  to project an image onto a projection place. An image screen  400 , on which the image projected by the image projection unit  180  is displayed, may be displayed on an image projection surface. 
         [0095]      FIG. 3  is a diagram showing the concept of image projection according to another embodiment of the present invention. 
         [0096]    Referring to  FIG. 3 , in the image projection unit  180 , the beam generated by the light source unit  181  passes through the lens unit  182  to project an image onto a projection place. An image screen  400 , on which the image projected by the image projection unit  180  is displayed, may be displayed on an image projection surface. 
         [0097]    The image projection unit  180  may project the image in various projection directions using the reflection unit  183 . 
         [0098]    The image projection method of the image projection unit  180  is well known and a detailed description thereof will thus be omitted. 
         [0099]    The image projection unit  180  may convert the video signal, data signal or OSD signal processed by the controller  170  or the video signal or data signal received from the external device interface  135  into RGB signal and generate a drive signal. 
         [0100]    Meanwhile, the image projection apparatus  100  shown in  FIG. 1  is merely exemplary and thus some of the shown components may be combined or omitted or other components may be added according to the type of the image projection apparatus  100 . 
         [0101]    That is, two or more components may be combined or one component may be divided into two or more components, if necessary. In addition, the functions performed by each block merely serve illustrate the embodiments of the present invention and details of operations or devices do not restrict the scope of the present invention. 
         [0102]    According to another embodiment of the present invention, the image projection apparatus  100  may receive and reproduce an image through the network interface  133  or the external device interface  135 , without the tuner  131  and the demodulator  132 , unlike  FIG. 1 . 
         [0103]    For example, the image projection apparatus  100  may be implemented by an image processing device for receiving broadcast signals or content according to various network services, such as a set-top box, and a content reproduction device for reproducing content received from the image processing device. 
         [0104]    In this case, an image display method according to an embodiment of the present invention may be performed by the image projection apparatus  100  described with reference to  FIG. 1 , the image processing device such as the set-top box or a content reproduction device including the image projection unit  180  and the audio output unit  185 . 
         [0105]    Next, a terminal  200  according to an embodiment of the present invention will be described with reference to  FIG. 4 . 
         [0106]      FIG. 4  is a block diagram showing a terminal  200  according to an embodiment of the present invention. 
         [0107]    Referring to  FIG. 4 , the terminal  200  may include a wireless communication unit  210 , an audio/video (A/V) input unit  220 , a user input unit  230 , a sensing unit  240 , an output unit  250 , a memory  260 , an interface  270 , a controller  280  and a power supply  290 . The components shown in  FIG. 4  are not mandatory and the terminal may be implemented by different number of components. 
         [0108]    Hereinafter, the components will be sequentially described. 
         [0109]    The wireless communication unit  210  may include one or more modules for enabling wireless communication between the terminal  200  and the network or between the terminal  200  and the image projection apparatus  100 . For example, the wireless communication unit  210  may include at least one of a broadcast reception module, a mobile communication module, a wireless Internet module, a short-range communication module and a location information module. 
         [0110]    The A/V input unit  220  is used to input an audio signal or a video signal and may include a camera  221  and a microphone  222 . The camera  221  processes an image frame of a still image or a moving image obtained by an image sensor in a video call mode or a capture mode. The processed image frame may be displayed through the display unit  251 . 
         [0111]    The image frame processed by the camera  221  may be stored in the memory  260  or transmitted to an external device through the wireless communication unit  210 . Two or more cameras may be provided according to use environments thereof. 
         [0112]    The microphone  222  receives an external sound signal through a microphone and processes the external sound signal into electrical voice data in a call mode, a recoding mode or a voice recognition mode. The processed voice data may be converted into a format transmittable to a mobile communication base station through the wireless communication unit  210 , in a call mode. Various noise cancellation algorithms for cancelling noise generated in a process of receiving an external sound signal may be implemented in the microphone  222 . Two or more microphones  222  may be provided according to use environments thereof. 
         [0113]    The user input unit  230  generates input data for operation control of the terminal  200  by the user. The user input unit  230  may include a key pad, a dome switch, a touch pad (resistive/capacitive), a jog wheel, a jog switch, etc. 
         [0114]    The sensing unit  240  may include one or more sensors for sensing at least one of internal information of the terminal, peripheral environment information of the terminal and user information. For example, the sensing unit  240  may include at least one of a proximity sensor  241 , an illumination sensor  242 , a touch sensor, an acceleration sensor, a magnetic sensor, a gravity sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared (IR) sensor, a fingerprint sensor, an ultrasonic sensor, an optical sensor (e.g., a camera  221  or a microphone  222 ), a battery gauge, an environment sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation sensor, a heat sensor, a gas sensor, etc.), and a chemical sensor (e.g., e-nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification may use a combination of information sensed by at least two of the sensors. 
         [0115]    The sensing unit  240  senses the current state of the terminal  200  such as the opened or closed state of the terminal  200 , the location of the terminal  200 , user contact or non-contact, the direction of the terminal or acceleration/deceleration of the terminal and generates a sensing signal for controlling operation of the terminal  200 . For example, if the terminal  200  is a slide phone, whether the slide phone is open or closed may be sensed. In addition, whether the power supply  290  supplies power or whether an external device is connected to the interface  270  may be sensed. 
         [0116]    The output unit  250  is used to generate visual, audible or tactile outputs and may include a display  251 , an audio output module  252 , an alarm unit  253 , a haptic module  254 , etc. 
         [0117]    The display  251  displays (i.e. outputs) information processed by the mobile terminal  200 . For example, if the mobile terminal  200  is in the call mode, a UI or Graphical User Interface (GUI) related to a call is displayed on the display  251 . If the mobile terminal  200  is in the video call mode or capture mode, a captured and/or received image, a UI, or a GUI is displayed on the display  251 . 
         [0118]    The display  251  may include at least one of a Liquid Crystal Display (LCD), a Thin Film Transistor-LCD (TFT-LCD), an Organic Light-Emitting Diode (OLED) display, a flexible display, and a three-dimensional (3D) display. 
         [0119]    If the display  251  and a sensor for sensing touch (hereinafter, referred to as a touch sensor)  244  are layered, the display  251  can be used not only as an output device but also as an input device. The touch sensor  244  may take the form of, for example, a touch film, a touch sheet, a touch pad, etc. 
         [0120]    The touch sensor  244  may convert variation in pressure applied at or in capacitance generated from a specific position of the display  251  into an electrical input signal. The touch sensor  244  may detect a touch pressure as well as a touched position and area. 
         [0121]    Upon sensing touch input, the touch sensor  244  outputs a touch signal or touch signals corresponding to the touch input to a touch controller. The touch controller processes the touch signal or signals and provides the processed signal or signals to the controller  280 . Thus, the controller  280  identifies a touched area of the display  251 . 
         [0122]    The audio output module  252  may output audio data received from the wireless communication unit  210  or stored in the memory  260  in a call signaling mode, call mode, recording mode, voice recognition mode, or broadcast reception mode. The audio output module  252  also outputs a sound signal (e.g. an incoming call ringtone, an incoming message ringtone, etc.) related to a function performed by the terminal  200 . The audio output module  252  may include a receiver, a speaker, a buzzer, etc. 
         [0123]    The alarm module  253  outputs a signal indicating occurrence of an event in the terminal  200 . Examples of the event occurring in the mobile terminal may include incoming call signaling, message reception, key input, touch input, etc. The alarm module  253  may notify occurrence of an event using a signal other than a video or audio signal, for example, vibration. Considering that the video or audio signal can be output through the display  251  or the audio output module  252 , the display  251  or the audio output module  252  may be regarded as a part of the alarm module  253 . 
         [0124]    The haptic module  254  generates various haptic effects to the user. A major example of the haptic effects is vibration. The strength and pattern of vibrations generated from the haptic module  254  can be controlled. For instance, different kinds of vibrations may be combined or sequentially output. 
         [0125]    The memory  260  may store programs needed for operations of the controller  280  and may temporarily store input data and output data (e.g. a phonebook, a message, a still image, a moving image, etc.). The memory  260  may store data regarding vibrations of various patterns and sounds that are output when the touchscreen is touched. The memory  260  may include at least one of flash memory-type storage medium, a hard disk-type storage medium, a multimedia card micro type storage medium, a card-type memory (e.g. Secure Digital (SD) or eXtreme Digital (XD)), a Random Access Memory (RAM), a Static Random Access memory (SRAM), a Read-Only Memory (ROM), an Electrically Erasable Programmable ROM (EEPROM), a Programmable Read-only Memory (PROM), a magnetic memory, a magnetic disk and an optical disc. The terminal  200  may operate on the Internet in regard to a web storage for performing the storage function of the memory  260 . 
         [0126]    The interface  270  serves as an interface for external devices to be connected with the terminal  200 . For example, the interface  270  can receive data transmitted from an external device, receive power to transfer to elements and components within the terminal  200 , or transmit internal data of the terminal  200  to an external device. The interface  270  may include wired or wireless headset ports, external power supply ports, wired or wireless data ports, memory card ports, ports for connecting a device having an identification module, audio input/output (I/O) ports, video I/O ports, earphone ports, or the like. 
         [0127]    The identification module may be a chip that stores various information for authenticating a use authority of the terminal  200  and may include a user identity module (UIM), a subscriber identity module (SIM), a universal subscriber identity module (USIM), and the like. In addition, the device having the identification module (also referred to herein as an “identifying device”) may be manufactured in the form of a smart card. Accordingly, the identifying device can be connected with the terminal  200  via a port. 
         [0128]    The controller  280  generally provides overall control to the terminal  200 . For instance, the controller  280  performs control operations and processes in relation to a voice call, data communication, a video call, etc. The controller  280  may include a multimedia module  281  for multimedia reproduction. The multimedia module  281  may be included in the controller  280  or may be provided separately from the controller  280 . 
         [0129]    The controller  280  can also perform pattern recognition processing to recognize handwriting input or a picture drawing input performed on the touchscreen as characters or images. 
         [0130]    In addition, the controller  280  may acquire information on movement of the user based on the sensing value acquired by the sensing unit  240 . For example, the controller  280  may acquire movement distance and movement speed of the user and calculate calories consumed by the user. 
         [0131]    The power supply  290  receives external power or internal power and supplies power to each component, for the operation of each component, under control of the controller  280 . 
         [0132]    Meanwhile, the mobile terminal may include a wearable device wearable by the user in addition to a handheld device. The wearable device may include a smart watch, smart glasses or a head mounted display (HMD). Hereinafter, examples of the wearable device will be described. 
         [0133]    The wearable device is able to exchange data with another terminal  200  (or otherwise cooperate with the terminal  200 ). The short-range communication module  214  may sense or recognize the wearable device, and permit communication between the wearable device and the terminal  200 . In addition, when the sensed wearable device is a device which is authenticated to communicate with the terminal  100 , the controller  280 , for example, may cause transmission of data processed in the terminal  200  to the wearable device via the short-range communication module  214 . Hence, a user of the wearable device may use the data processed in the terminal  200  on the wearable device. For example, when a call is received by the terminal  200 , the user may answer the call using the wearable device. Also, when a message is received by the terminal  200 , the user can check the received message using the wearable device. 
         [0134]    Hereinafter, a method of operating the image projection apparatus  100  will be described with reference to  FIGS. 5 to 22 . 
         [0135]      FIG. 5  is a flowchart illustrating a method of operating an image projection apparatus  100  according to an embodiment of the present invention. 
         [0136]    Referring to  FIG. 5 , the controller  170  of the image projection apparatus  100  measures a distance to an image projection place through the sensing unit  105  (S 101 ). 
         [0137]    The sensing unit  105  may measure a distance to an image projection place. Here, the image projection place may also be referred to as an image screen area. 
         [0138]    As an embodiment, the sensing unit  105  may measure a distance to one surface, onto which an image is projected, using a distance sensor  106 . Thus, the controller  170  may acquire information on the distance from the sensing unit to the image projection place. 
         [0139]    The controller  170  of the image projection apparatus  100  adjusts an image to be projected based on the measured distance (S 103 ). 
         [0140]    The controller  170  may adjust one or more of the focus, size and quality of the image to be projected based on the measured distance. For example, the controller  170  may adjust one or more of the focus, resolution, size, brightness, color and contrast of the image to be projected based on the measured distance. 
         [0141]    The controller  170  of the image projection apparatus  100  controls the image projection unit  180  to project the adjusted image (S 105 ). 
         [0142]    The controller  170  may control the image projection unit  180  to project the adjusted image onto one image projection surface. 
         [0143]    This will be described with reference to  FIGS. 6 and 7 . 
         [0144]      FIG. 6  is a diagram showing image projection according to an embodiment of the present invention. 
         [0145]    Referring to  FIG. 6 , the controller  170  may control the image projection unit  180  to project the adjusted image onto the image screen area. On the image projection surface, an image screen  400  may be displayed. Meanwhile, the reflection unit  183  of the image projection unit  180  may reflect the beam for the projected image on to the image projection surface. 
         [0146]      FIG. 7  is a diagram showing image projection according to another embodiment of the present invention. 
         [0147]    Referring to  FIG. 7 , the controller  170  may control the image projection unit  180  to project the adjusted image onto an image projection surface. An image screen  400  may be displayed on the image projection surface. Meanwhile, the reflection unit  183  of the image projection unit  180  may reflect the beam for the projected image onto an image projection surface. Here, the reflection unit  183  may adjust the reflection direction of the beam and project the image onto a surface different from the surface shown in  FIG. 1 . Thus, the image projection apparatus  100  may project the image in various directions by adjusting the reflection direction of the reflection unit  183 . 
         [0148]      FIG. 5  is referred to again. 
         [0149]    The controller  170  of the image projection apparatus  100  detects the terminal  200  (S 107 ). 
         [0150]    The controller  170  may detect the terminal  200  located within a predetermined distance of the image projection apparatus  100 . 
         [0151]    As an embodiment, the controller  170  may generate a detection signal for detecting the terminal  200  and transmit the generated detection signal to the terminal  200  located within the predetermined distance through the communication unit  160 . The controller  170  may receive a response signal from the terminal  200  through the communication unit  160 . 
         [0152]    As another embodiment, the controller  170  may receive a response signal according to operation for tagging the image projection apparatus  100  with the terminal  200 . Here, the response signal according to the tagging operation may be a signal using a non-contact proximity wireless communication technology. 
         [0153]    The controller  170  of the image projection apparatus  100  receives an operation signal from the detected terminal (S 109 ). 
         [0154]    The controller  170  may receive an operation signal related to operation of the image projection apparatus  100  from one or more detected terminals  200  through the communication unit  160 . 
         [0155]    Here, the operation signal may be a signal for controlling the image projection apparatus  100 , an image signal for an image projected by the image projection apparatus  100  or a sound signal for output of sound. In addition, the operation signal may be a signal for displaying the screen displayed on the terminal  200  on the image screen  400  through the image projection apparatus  100  and outputting sound output from the terminal. 
         [0156]    The controller  170  of the image projection apparatus  100  performs operation corresponding to the received operation signal (S 111 ). 
         [0157]    The controller  170  may perform operation corresponding to the operation signal received from the terminal  200  and operation corresponding to the received operation signal may include various operations performed by the terminal  200 . For example, operation corresponding to the operation signal received from the terminal  200  may include operation related to a voice call, data communication, video communication and application execution. 
         [0158]    This will be described with reference to  FIGS. 8 and 9 . 
         [0159]      FIG. 8  is a diagram showing display of a connected terminal according to an embodiment of the present invention. 
         [0160]    Referring to  FIG. 8 , the controller  180  may display a terminal connection icon  420  indicating that one or more terminals  200  are detected and connected in the image projected by the image projection unit  180 . The terminal connection icon  420  may be displayed on the image screen  400  according to the image projected by the image projection unit  180 . 
         [0161]    In addition, the controller  170  may receive the operation signal from the detected terminal  200  and output various image screens  400  and sound related to operation of the terminal  200 . For example, the controller  170  may receive the operation signal for one or more of an incoming call, a message and an alarm of the terminal  200  and output one or more of the image screen  400  and sound corresponding to the received operation signal. 
         [0162]      FIG. 9  is a diagram showing an image screen upon an incoming call according to an embodiment of the present invention. 
         [0163]    The controller  170  may receive the operation signal for the incoming call from the detected terminal  200  through the communication unit  160 . The controller  170  may display an incoming call notification window  470  on the image screen  400  corresponding to the operation signal for the incoming call. The incoming call notification window  470  may be displayed on the image window  400  according to the image projected by the image projection unit  180  and information  480  on a caller may be displayed. Here, the information on the caller may include one or more of the telephone number, name, photo and memo of the caller. 
         [0164]    The above-described example serves to illustrate operation of the controller  170  performed in correspondence with the operation signal received from the terminal  200 , without being limited thereto. Accordingly, the image projection apparatus  100  may perform various operations capable of being performed by the terminal  200  according to selection of the user or designer. 
         [0165]      FIG. 5  will be referred to again. 
         [0166]    The controller  170  of the image projection apparatus  100  senses a user gesture (S 113 ). 
         [0167]    The controller  170  may sense a user gesture through one or more of the sensing unit  105  and the image acquisition unit  120 . 
         [0168]    As an embodiment, the controller  170  may acquire information on motion of the user through one or more sensors included in the sensing unit  105  and sense the user gesture based on the acquired information. 
         [0169]    As another embodiment, the controller  170  may recognize motion of the user based on the image of the user acquired by the image acquisition unit  120  and sense the user gesture based on the recognized motion. 
         [0170]    Meanwhile, the controller  170  may sense user input in an area between the image projection apparatus  100  and the projected image screen  400 . In addition, the controller  170  may divide the area between the image projection apparatus  100  and the projected image screen  400  into a plurality of areas and sense user input in each of the plurality of areas. Here, the area between the image projection apparatus  100  and the image screen  400  may be referred to as a gesture area  500 . 
         [0171]    This will be described with reference to  FIG. 10 . 
         [0172]      FIG. 10  is a user gesture area according to an embodiment of the present invention. 
         [0173]    Referring to  FIG. 10 , the gesture area  500  between the image projection apparatus  100  and the image screen  400  may be divided into a first gesture area  510  and a second gesture area  530 . 
         [0174]    As an embodiment, the motion sensor  107  of the image projection apparatus  100  may sense user motion in the gesture area  500 . The controller  170  may acquire information on user motion from the motion sensor  107  and sense a user gesture. The controller  170  may identify user motion in the first gesture area  510  or the second gesture area  530  of the gesture area  500  based on the acquired information on user motion. The controller  170  may perform operation corresponding to the area. Hereinafter, this will be described in detail. 
         [0175]      FIG. 5  is referred to again. 
         [0176]    The controller  170  of the image projection apparatus  100 , if it is determined that the sensed user gesture is in the first gesture area (S 115 ), performs control operation corresponding to the displayed image screen (S 117 ). 
         [0177]    The controller  170  may perform control operation corresponding to the displayed image screen  400  if the user gesture sensed by the sensing unit  105  is in the first gesture area  510 . Here, the control operation corresponding to the displayed image screen  400  may correspond to one of a menu, a notification window, a popup window and a control bar displayed on the image screen  400 . 
         [0178]    This will be described with reference to  FIGS. 11 to 15 . 
         [0179]      FIG. 11  is a diagram showing a first gesture area according to an embodiment of the present invention. 
         [0180]    Referring to  FIG. 11 , the first gesture area  510  may be an area located within a predetermined distance from the image screen  400  between the image projection apparatus  100  and the image screen  400 . Here, the predetermined distance to the first gesture area  510  may be variously set according to selection of the user or designer. 
         [0181]    An embodiment of control operation corresponding to a user gesture in the first gesture area  510  will be described with reference to  FIGS. 12 to 13 . 
         [0182]      FIG. 12  is a diagram showing a menu display screen according to an embodiment of the present invention. 
         [0183]      FIG. 13  is a diagram showing user input for a menu display screen according to an embodiment of the present invention. 
         [0184]    Referring to  FIG. 12 , the controller  170  may project the image screen  400  included in the menu window  410  related to the function of the image projection apparatus  100  through the image projection unit  180 . Thus, a screen corresponding to the image signal and the menu window  410  may be displayed on the projected image screen  400 . The controller  170  may acquire user input corresponding to the menu window  410  through the motion sensor  107  included in the sensing unit  105 . Here, user input corresponding to the menu window  410  may be user input for selecting one of the menus displayed in the menu window  410 . The user input corresponding to the menu window  410  may be user gesture input in the first gesture area  510 . This will be described in detail with reference to  FIG. 13 . 
         [0185]    Referring to  FIG. 13 , the controller  170  may recognize user gesture input in the first gesture area  510  through the motion sensor  107 . The controller  170  may perform control operation corresponding to the image screen  400  displayed based on the user gesture input in the first gesture area  510 . Thus, the controller  170  may perform operation corresponding to the selected menu window  410  based on user input in the first gesture area  510  and the menu window  410  of the image screen  400  corresponding to the user input. Another embodiment of control operation corresponding to the user gesture in the first gesture area  510  will be described with reference to  FIGS. 14 to 15 . 
         [0186]      FIG. 14  is a diagram showing a volume control screen according to an embodiment of the present invention. 
         [0187]      FIG. 15  is a diagram showing user input for a volume control screen according to an embodiment of the present invention. 
         [0188]    Referring to  FIG. 14 , the controller  170  may project the image screen  400  including the volume control bar  430  related to the volume of the image projection apparatus  100  through the image projection unit  180 . Thus, a screen corresponding to an image signal and the volume control bar  430  may be displayed on the projected image screen  400 . The controller  170  may acquire user input corresponding to the volume control bar  430  through the motion sensor  107  included in the sensing unit  105 . Here, the user input corresponding to the volume control bar  430  may be user input for moving the location of a control tap displayed in the volume control bar  430 . The user input corresponding to the volume control bar  430  may be user gesture input in the first gesture area  510 . This will be described in detail with reference to  FIG. 15 . 
         [0189]    Referring to  FIG. 15 , the controller  170  may recognize user gesture input in the first gesture area  510  through the motion sensor  107 . The controller  170  may perform control operation corresponding to the image screen  400  displayed based on the user gesture input in the first gesture area  510 . Thus, the controller  170  may perform operation corresponding to the moved volume control tap based on the user input in the first gesture area  510  and the volume control bar  430  of the image screen  400  corresponding to the user input. 
         [0190]    The controller  170  may perform operation corresponding to the user input in the first gesture area  510  based on the user gesture and the displayed image screen  400 . 
         [0191]    Operation corresponding to the user input in the first gesture area  510  is mere exemplary and the present invention is not limited thereto. Accordingly, operation corresponding to the user input in the first gesture area  510  may be variously set according to selection of the user or designer. 
         [0192]      FIG. 5  is referred to again. 
         [0193]    The controller  170  of the image projection apparatus  100 , if it is determined that the sensed user gesture is in the second gesture area (S 119 ), performs control operation corresponding to the sensed user gesture (S 121 ). 
         [0194]    The controller  170  may perform control operation corresponding to the sensed user gesture, if it is determined the user gesture sensed through the sensing unit  105  is in the second gesture area  510 . 
         [0195]    This will be described with reference to  FIGS. 16 to 20 . 
         [0196]      FIG. 16  is a diagram showing a second gesture area according to an embodiment of the present invention. 
         [0197]    Referring to  FIG. 16 , the second gesture area  530  may be an area outside the predetermined distance from the image screen  400  in the area between the image projection apparatus  100  and the image screen  400 . Accordingly, the second gesture area  530  may be an area obtained by excluding the first gesture area  510  of the gesture area  500 . 
         [0198]    An embodiment of control operation corresponding to the user gesture in the second gesture area  530  will be described with reference to  FIGS. 17 to 18 . 
         [0199]      FIG. 17  is a diagram showing user gesture input according to an embodiment of the present invention. 
         [0200]      FIG. 18  is a diagram showing user input in the second gesture area according to an embodiment of the present invention. 
         [0201]    Referring to  FIG. 17 , the controller  170  may project the image screen  400  according to the image signal through the image projection unit  180 . Thus, the screen corresponding to the image signal may be displayed on the projected image screen  400 . The controller  170  may acquire user gesture input through the motion sensor  107  included in the sensing unit  105 . Here, the gesture input may be a user gesture moving in the right direction of the image screen  400 . The user gesture moving in the right direction of the image screen  400  may be user gesture input in the second gesture area  530 . This will be described in detail with reference to  FIG. 18 . 
         [0202]    Referring to  FIG. 18 , the controller  170  may recognize the user gesture input in the second gesture area  530  through the motion sensor  107 . The controller  170  may perform control operation for switching the channel of the displayed image screen  400  to another channel based on the user gesture input in the second gesture area  530 . Thus, the controller  170  may switch the channel of the displayed image screen  40  to another channel when acquiring the user gesture input moving in the right direction in the second gesture area  530 . 
         [0203]    Meanwhile, the controller  170  may perform control operation for switching the channel of the displayed image screen  400  to another channel when acquiring user gesture input moving in the left direction in the second gesture area  530 . The switched channel may be different from the channel switched according to the user gesture input moving in the right direction. 
         [0204]    Another embodiment of control operation corresponding to the user gesture in the second gesture area  530  will be described with reference to  FIGS. 19 to 20 . 
         [0205]      FIG. 19  is a diagram showing user gesture input according to another embodiment of the present invention. 
         [0206]      FIG. 20  is a diagram showing user input in the second gesture area according to another embodiment of the present invention. 
         [0207]    Referring to  FIG. 19 , the controller  170  may project the image screen  400  according to the image signal through the image projection unit  180 . Thus, the screen corresponding to the image signal may be displayed on the projected image screen  400 . The controller  170  may acquire user gesture input through the motion sensor  107  included in the sensing unit  105 . Here, the gesture input may be a user gesture moving in an upper direction of the image screen  400 . The user gesture moving in the upper direction of the image screen  400  may be user gesture input in the second gesture area  530 . This will be described in detail with reference to  FIG. 20 . 
         [0208]    Referring to  FIG. 20 , the controller  170  may recognize the user gesture input in the second gesture area  530  through the motion sensor  107 . The controller  170  may perform operation for increasing the volume of sound corresponding to the displayed image screen  400  based on the user gesture input in the second gesture area  530 . Thus, the controller  170  may increase the volume of sound corresponding to the displayed image screen  400  when acquiring the user gesture input moving in the upper direction in the second gesture area  530 . 
         [0209]    The controller  170  may decrease the volume of sound corresponding to the displayed image screen  400  when acquiring user gesture input moving in the lower direction within the second gesture area  530 . 
         [0210]    Another embodiment of control operation corresponding to a user gesture in the second gesture area  530  will be described with reference to  FIGS. 21 to 22 . 
         [0211]      FIG. 21  is a diagram showing an entire channel list display screen according to an embodiment of the present invention. 
         [0212]      FIG. 22  is a diagram showing user input in the second gesture area according to another embodiment of the present invention. 
         [0213]    Referring to  FIG. 21 , the controller  170  may project the image screen  400  including an entire channel list  450  indicating a list of channels through the image projection unit  180 . Thus, a screen corresponding to the image signal and the entire channel list  450  may be displayed on the projected image screen  400 . The controller  170  may acquire user input through the motion sensor  107  included in the sensing unit  105 . Here, the gesture input may be a user gesture moving in the upper direction of the image screen  400 . The user gesture moving in the upper direction of the image screen  400  may be user gesture input in the second gesture area  530 . This will be described in detail with reference to  FIG. 22 . 
         [0214]    Referring to  FIG. 22 , the controller  170  may recognize user gesture input in the second gesture area  530  through the motion sensor  107 . The controller  170  may perform control operation for scrolling the entire channel list  450  included in the displayed image screen  400  in the upper direction based on the user gesture input in the second gesture area  530 . The controller  170  may scroll the entire channel list  450  included in the displayed image screen  400  in the upper direction when acquiring the user gesture input moving in the upper direction in the second gesture area  530 . 
         [0215]    Meanwhile, the controller  170  may scroll the entire channel list  450  included in the displayed image screen  400  in the lower direction when acquiring the user gesture input moving in the lower direction in the second gesture area  530 . 
         [0216]    The controller  170  may perform operation corresponding to the user input in the second gesture area  530  based on the user gesture. 
         [0217]    Operation corresponding to the user input in the second gesture area  530  is exemplary and the present invention is not limited thereto. Accordingly, operation corresponding to the user input in the second gesture area  530  may be variously set according to selection of the user or designer. 
         [0218]    The image projection apparatus  100  according to the present invention can project an image according to a distance to an image projection place, thereby providing a high-quality image. 
         [0219]    In addition, in the present invention, it is possible to output an operation screen and sound of the connected terminal  200  through the image projection apparatus  100 . 
         [0220]    In addition, in the present invention, it is possible to perform various control operations based on user input in an area between the image projection apparatus  100  and the image screen  400 . Since it is possible to perform different control operations according to the distance to the image screen  400 , the user can easily control the image projection apparatus  100  without direct input to the image projection apparatus  100  or the input device. 
         [0221]    According to various embodiments of the present invention, since it is possible to project an image corresponding to a distance of an image projection place, it is possible to provide a user with a high-quality image. 
         [0222]    In addition, in the present invention, since various user gestures related to a projected image can be recognized, it is possible to easily perform operations and functions desired by a user. 
         [0223]    According to one embodiment of the present invention, the above-described method may be implemented as code that can be written to a processor-readable recording medium and can thus be read by a processor. Examples of the processor-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, optical data storage, and a carrier wave (e.g., data transmission over the Internet). 
         [0224]    The above-described image projection apparatus is not limited to the configurations and the methods of the above-described embodiments and some or all of the above-described embodiments may be combined to be variously modified.