Abstract:
An information processing apparatus including a main body, a member including a projection device, the member moveably attached to the main body, a detector that detects an orientation of the moveable member with respect to the main body, and a processor that controls the projection device based on an output of the detector.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of priority under 35 U.S.C. §119 to Japanese Patent Application JP 2010-244426 filed in the Japan Patent Office on Oct. 29, 2010, the entire content of which is hereby incorporated by reference. 
       BACKGROUND 
       [0002]    The present disclosure relates to a projection device, a projection method, and a program. 
         [0003]    Devices having projection units for projecting images (projectors) have been known so far (see JP 2007-219225A). Further, recently, imaging devices mounted with small projectors have been proposed. According to such imaging device, content acquired through imaging can be projected from the projector. Thus, the content can be viewed by a large number of users without using a display device. 
       SUMMARY 
       [0004]    However, the aforementioned imaging device has a problem in that, as a button or menu should be operated by the time projection from the projector is started, the operation for starting the projection is complex. 
         [0005]    In light of the foregoing, it is desirable to provide an imaging device, a method for controlling the imaging device, and a program, which are novel and improved, and which can reduce the complexity of the operation for starting projection from a projection unit. 
         [0006]    According to an exemplary embodiment, the disclosure is directed to an information processing apparatus including a main body, a member including a projection device, the member moveably attached to the main body, a detector that detects an orientation of the moveable member with respect to the main body, and a processor that controls the projection device based on an output of the detector. 
         [0007]    According to another exemplary embodiment, the disclosure is directed to an information processing method performed by an information processing apparatus, the method including detecting, by a detector of the information processing apparatus, an orientation of a movable member movably attached to the main body of the information processing apparatus with respect to the main body, and controlling, by a processor of the information processing apparatus, a projection device included on the movable member based on an output of the first detector. 
         [0008]    According to another exemplary embodiment, the disclosure is directed to a non-transitory computer-readable medium including computer-program instructions, which when executed by an information processing apparatus, cause the information processing apparatus to perform a method that includes detecting an orientation of a member moveably attached to a main body of the information processing apparatus, the member including a projection device, and controlling the projection device based on an output of the first detector. 
         [0009]    According to the embodiments of the present disclosure described above, it is possible to reduce the complexity of the operation for starting projection from a projection unit. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is a perspective view showing the appearance of an imaging device in accordance with an embodiment of the present disclosure; 
           [0011]      FIG. 2  is a perspective view showing the appearance of an imaging device in accordance with an embodiment of the present disclosure; 
           [0012]      FIG. 3  is an explanatory diagram showing the configuration of a projector module; 
           [0013]      FIG. 4  is an explanatory diagram showing a specific example of an imaging screen; 
           [0014]      FIG. 5  is an explanatory diagram showing a specific example of an index screen; 
           [0015]      FIG. 6  is an explanatory diagram showing a specific example of a playback screen; 
           [0016]      FIG. 7  is a block diagram showing the configuration of an imaging device in accordance with the first embodiment of the present disclosure; 
           [0017]      FIG. 8  is a flowchart showing the operation process of the imaging device in accordance with the first embodiment of the present disclosure; 
           [0018]      FIG. 9  is a perspective view showing the posture of the imaging device during projection in accordance with the first embodiment of the present disclosure; 
           [0019]      FIG. 10  is a perspective view illustrating the operation of the imaging device during projection in accordance with the first embodiment of the present disclosure; 
           [0020]      FIG. 11  is a flowchart showing the operation process of an imaging device in accordance with the second embodiment of the present disclosure; and 
           [0021]      FIG. 12  is a perspective view showing the posture of the imaging device during projection in accordance with the second embodiment of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0022]    Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the appended drawings. Note that, in this specification and the appended drawings, structural elements that have substantially the same function and structure are denoted with the same reference numerals, and repeated explanation of these structural elements is omitted. 
         [0023]    The “DETAILED DESCRIPTION OF THE EMBODIMENTS” will be described in accordance with the following order. 
         [0024]    1. Basic Configuration of Imaging Device in accordance with Embodiment of the Present Disclosure 
         [0025]    2. First Embodiment
       2-1. Configuration of Imaging Device   2-2. Operation of Imaging Device       
 
         [0028]    3. Second Embodiment 
         [0029]    4. Conclusion 
       1. BASIC CONFIGURATION OF IMAGING DEVICE IN ACCORDANCE WITH EMBODIMENT OF THE PRESENT DISCLOSURE 
       [0030]    The present disclosure can be implemented in various configurations as exemplarily described in detail in “2. First Embodiment” to “3. Second Embodiment.” In addition, an imaging device ( 1 ) described in each embodiment includes: 
         [0000]    A: a main body unit  4 ;
 
B: an open/close unit  8  connected to the main body unit  4  in an openable/closable manner;
 
C: a projection unit (a projector module  18 ) provided on the open/close unit  8 ; and
 
D: a control unit (a main control unit  100 ) that controls the start of projection in accordance with the direction that the main body unit  4  faces and the projection direction of the projection unit.
 
         [0031]    In this specification, an imaging device is referred to as an example of a projection device. In addition, although the imaging device  1  (video camera) is shown as an example of an imaging device in each embodiment of the present disclosure, the imaging device is not limited thereto. For example, the imaging device can be an information processing device such as a PC (Personal Computer), a PDA (Personal Digital Assistant), a home game machine, a portable phone, a PHS (Personal Handyphone System), a portable music playback device, a portable image processing device, or a portable game machine. 
         [0032]    Hereinafter, a basic configuration that is common to each embodiment will be described with reference to  FIGS. 1 to 6 . 
         [0033]      FIGS. 1 and 2  are perspective views each showing the appearance of an imaging device  1  in accordance with an embodiment of the present disclosure. As shown in  FIG. 1 , the imaging device  1  includes a main body unit  4 , a hinge mechanism  6 , and an open/close unit  8 . 
         [0034]    The main body unit  4  of the imaging device  1  includes a zoom operation unit  21 , a manual operation unit  22 , a still image capturing operation unit  23 , a mode operation unit  24 , a projection switching operation unit  25 , and an imaging optical unit  31 . 
         [0035]    The imaging optical unit  31  is an imaging unit that includes a shooting lens for condensing light emitted from a subject and a zoom lens, and that forms an image of the subject at a signal conversion unit such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). When an image of the subject is formed at the signal conversion unit, the image of the subject is converted into an electrical image signal by the signal conversion unit. 
         [0036]    The zoom operation unit  21  receives a user&#39;s operation for changing the focal length of the imaging optical unit  31  in the shooting mode. The zoom operation unit  21  includes a lever that can be tiled to a wide position or a telephoto position as shown in  FIG. 1 , for example. In this case, the imaging optical unit  31  reduces the focal length (shrinks the image of the subject) when the lever is tilted to the wide position, and increases the focal length (enlarges the image of the subject) when the lever is tilted to the telephoto position. 
         [0037]    The manual operation unit  22  receives a user&#39;s operation for focusing the imaging optical unit  31 . The manual operation unit  22  includes a dial that can rotate clockwise or counterclockwise as shown in  FIG. 1 , for example. In this case, the imaging optical unit  31  adjusts the focal position in accordance with the rotation direction and the rotation amount of the dial. 
         [0038]    The still image capturing operation unit  23  receives a user&#39;s operation for capturing a still image. The still image capturing operation unit  23  includes a pressing button as shown in  FIG. 1 , for example. In this case, the imaging device  1  captures a still image in accordance with pressure applied to the button, thereby acquiring image data of the still image. 
         [0039]    The mode operation unit  24  receives a user&#39;s operation for switching the operation mode of the imaging device  1 . Herein, operation modes of the imaging device  1  are broadly divided into a shooting mode and a playback mode, for example. The mode operation unit  24  includes a pressing button as shown in  FIG. 1 , for example. In this case, the imaging device  1  switches the operation mode between the shooting mode and the playback mode in accordance with pressure applied to the button. 
         [0040]    Note that the shooting mode is an operation mode for capturing an image of a subject by operating the imaging optical unit  31 , the signal conversion unit, and the like. Meanwhile, the playback mode is an operation mode for playing back the image data acquired in the shooting mode, for example. The details of such operation modes are described below with reference to  FIG. 4  to  FIG. 6 . 
         [0041]    The projection switching operation unit  25  receives a user&#39;s operation for switching whether or not to project a screen, which has been generated by the imaging device  1 , from the projector module  18 . For example, the projection switching operation unit  25  includes a pressing button as shown in  FIG. 1 , for example. In this case, the imaging device  1  switches whether or not to project a screen from the projector module  18  in accordance with pressure applied to the button. Note that while a screen is projected from the projector module  18 , the touch panel  12  can display the same screen as the projection screen, display a screen that is different from the projection screen, or display no screen. 
         [0042]    Described above is the configuration of the main body unit  4  of the imaging device  1 . Next, the configuration of the open/close unit  8  that is connected to the main body unit  4  via the hinge mechanism  6  will be described. 
         [0043]    The open/close unit  8  is connected to the main body unit  4  via the hinge mechanism  6  such that it can rotate about a first rotation axis L 1  and about a second rotation axis L 2 , which is perpendicular to the first rotation axis L 1 , shown in  FIG. 2 .  FIG. 1  shows a state in which the open/close unit  8  is closed with respect to the main body unit  4 , while  FIG. 2  shows a state in which the open/close unit  8  is rotated about the first rotation axis L 1  so that the open/close unit  8  is open with respect to the main body unit  4 . 
         [0044]    Such an open/close unit  8  has the touch panel  12  on one side and has the projector module  18  on a side surface as shown in  FIG. 2 . Note that the position at which the projector module is provided is not limited to the side surface of the open/close unit  8  shown in  FIG. 2 , and can be another side surface of the open/close unit  8 , the same surface as the surface on which the touch panel  12  is provided, or a rear surface. 
         [0045]    The touch panel  12  is an example of an operation display unit having a display function and an operation detection function. The touch panel  12  can display an image of a subject obtained by focusing light with the imaging optical unit  31  in the shooting mode, and can display an index screen, a playback screen, or the like described below in the playback mode. In addition, the user is able to input various instructions or information to the imaging device  1  by operating the touch panel  12 . 
         [0046]    The projector module  18  is a projection unit that projects a screen generated by the imaging device  1 . The projector module  18  can, in response to a user&#39;s operation on the projection switching operation unit  25 , project an index screen, a playback screen, or the like described below, for example. Hereinafter, the detailed configuration of the projector module  18  will be described with reference to  FIG. 3 . 
         [0047]      FIG. 3  is an explanatory diagram showing the configuration of the projector module  18 . As shown in  FIG. 3 , the projector module  18  includes a light source  182 , an optical image display unit  184 , and a projection lens  186 . 
         [0048]    The light source  182  includes white LED (Light Emitting Diode) that emits white light, and an optical unit that diffuses the light emitted from the white LED and shines the light onto the optical image display unit  184 . Although this embodiment mainly describes an example in which the light source  182  includes white LED, the configuration of the light source  182  is not limited thereto. For example, the light source  182  can include a high-pressure mercury lamp. 
         [0049]    The optical image display unit  184  is a liquid crystal panel that displays a screen for projection. The screen displayed on the optical image display unit  184  is supplied to the projection lens  186  by the light emitted from the light source  182 . The projection lens  186  forms an image of the screen, which is displayed on the optical image display unit  184 , on the projection screen. 
         [0050]    (Shooting Mode and Playback Mode) 
         [0051]    Described above is the basic configuration of the imaging device  1  in accordance with an embodiment of the present disclosure. Next, the shooting mode and the playback mode, which are the operation modes of the imaging device  1 , will be described. 
         [0052]    The shooting mode is an operation mode for capturing an image of a subject by operating the imaging optical unit  31 , the signal conversion unit, and the like. In this shooting mode, an imaging screen R of a subject obtained by the imaging optical unit  31  is displayed on the touch panel  12  as shown in  FIG. 4 . Further, while the imaging screen R is being recorded, a recording mark  62  is added to the imaging screen R as shown in  FIG. 4 . 
         [0053]    Note that when the still image capturing operation unit  23  is pressed by the user in the shooting mode, the imaging device  1  captures a still image of the subject to acquire image data of the still image. 
         [0054]    Then, when the mode operation unit  24  is pressed by the user in the shooting mode, the imaging device  1  switches the operation mode to the playback mode. The playback mode is an operation mode for playing back content data. Therefore, after switching the operation mode to the playback mode, the imaging device  1  generates an index screen I for the user to select content data to be played back. 
         [0055]      FIG. 5  is an explanatory diagram showing a specific example of the index screen I. As shown in  FIG. 5 , the index screen I includes thumbnails s 1 , s 2 , s 3 , . . . each corresponding of a plurality of pieces of content data. Note that the content data can be image data acquired by the imaging device  1  through imaging or image data acquired from the outside. In addition, the data type of the content data is not limited to image data, and the data type of the content data can be audio data, game, software, or the like. In addition, each thumbnail s can be either a still image or a moving image. 
         [0056]    The index screen I includes an upward scroll button  64  and a downward scroll button  66 . The user is able to scroll on the index screen I in any direction by selecting the upward scroll button  64  or the downward scroll button  66 . 
         [0057]    In addition, the user is able to select content data to be played back by placing a cursor  68  over a desired thumbnail on the index screen I. Then, when content data to be selected is determined by the user, the imaging device  1  starts playing back the selected content data and generates a playback screen of the content data. 
         [0058]      FIG. 6  is an explanatory diagram showing a specific example of the playback screen P of the content data. As shown in  FIG. 6 , the playback screen P of the content data includes a stop button  71 , a fast-rewind button  72 , a play/pause button  73 , a fast-forward button  74 , and a return button  76 . 
         [0059]    When the stop button  71 , the fast-rewind button  72 , the play/pause button  73 , or the fast-forward button  74  is selected by the user, the imaging device  1  controls playback of the content data in accordance with the selected button. For example, when the stop button  71  is selected by the user, the imaging device  1  stops playback of the content data. In addition, when the return button  76  is selected by the user, the imaging device  1  stops playback of the content data, and generates the index screen I. 
         [0060]    Although description has been made above of an example in which switching between the shooting mode and the playback mode is performed in accordance with a user&#39;s operation on the mode operation unit  24 , the trigger to switch the mode is not limited thereto. For example, a button for switching the operation mode to the playback mode can be added to the imaging screen R so that the imaging device  1  can, when the button for switching the operation mode to the playback mode is selected by the user, switch the operation mode to the playback mode. Likewise, a button for switching the operation mode to the shooting mode can be added to the index screen I or the playback screen P so that the imaging device  1  can, when the button for switching the operation mode to the shooting mode is selected by the user, switch the operation mode to the shooting mode. 
         [0061]    The configuration of the index screen I is not limited to the example shown in  FIG. 5 . For example, the index screen I can be a screen in which a thumbnail of image data is overlaid on a position associated with the image data on a map (e.g., imaging position), or a screen in which a thumbnail of image data is overlaid on a position associated with the image data on the time axis (e.g., imaging date and time). 
         [0062]    In addition, the imaging device  1  in the playback mode can display the aforementioned index screen I or playback screen P on the touch panel  12 , and can also project such screen from the projector module  18 . 
       2. FIRST EMBODIMENT 
     2-1. Configuration of Imaging Device 
       [0063]      FIG. 7  is a block diagram showing the configuration of the imaging device  1  in accordance with the first embodiment of the present disclosure. As shown in  FIG. 7 , the imaging device  1  in accordance with the first embodiment of the present disclosure includes a control unit  10 , an imaging unit  30 , and a recording/playback processing unit  40 . 
         [0064]    The shooting unit (imaging unit)  30  includes the imaging optical unit  31 , an optical unit control unit  32 , a signal conversion unit  33 , an image signal processing unit  34 , an audio input unit  35 , and an audio signal processing unit  36 . 
         [0065]    The imaging optical unit  31  includes a lens group for imaging a subject, a diaphragm adjustment mechanism, a focus adjustment mechanism, a zoom mechanism, a shutter mechanism, a flash mechanism, a shake correction mechanism, and the like, and forms an image of the subject at the signal conversion unit  33 . 
         [0066]    The optical unit control unit  32 , upon receiving a control signal from the control unit  10 , generates a control signal to be supplied to the imaging optical unit  31 . Then, the optical unit control unit  32  supplies the generated control signal to the imaging optical unit  31  and performs control such as zoom control, shutter control, and exposure control. 
         [0067]    The signal conversion unit  33  includes, for example, an image sensor such as a CCD or a CMOS as described above. The signal conversion unit  33 , when supplied with an image acquisition timing signal from the control unit  10  on the basis of a user&#39;s operation on the operation input unit  20 , converts an image of the subject, which has been formed on an imaging plane by the imaging optical unit  31 , into an electrical image signal, and supplies it to the image signal processing unit  34 . In the shooting mode, image acquisition timing signals are continuously supplied from the control unit  10 . Thus, the signal conversion unit  33  acquires image signals of a plurality of frames by continuously converting image signals of the subject. 
         [0068]    The image signal processing unit  34 , on the basis of a control signal from the control unit  10 , performs processes such as gamma correction and AGC (Auto Gain Control) on the image signal, and also performs a process of converting the image signal into a digital format. 
         [0069]    The audio input unit  35  collects sound around the subject in the shooting mode. The audio input unit  35  converts the collected sound into an electrical audio signal, and supplies it to the audio signal processing unit  36 . The audio signal processing unit  36 , on the basis of a control signal from the control unit  10 , performs processes such as correction or AGC on the audio signal, and also performs a process of converting the audio signal into a digital format. 
         [0070]    The recording/playback processing unit  40  includes an encoding/decoding unit  41 , a disc interface  42 , a storage device  44 , an output processing unit  45 , and buffer memory  46  as shown in  FIG. 7 , and functions as a playback unit and a recording unit. 
         [0071]    The encoding/decoding unit  41  has an encoding function in which an image signal and an audio signal supplied from the shooting unit  30  and additional recording information such as time information are encoded and multiplexed using a MPEG scheme or the like, and then converted into compressed data including image data and audio data. 
         [0072]    Meanwhile, the encoding/decoding unit  41  also has a decoding function (a playback function) in which image data and audio data are separated from the compressed data, and then the image data and the audio data are decoded into an image signal and an audio signal (a playback processing unit). 
         [0073]    In addition, the encoding/decoding unit  41  further performs, on the basis of a control signal from the control unit  10 , automatic white balance control, exposure correction control, magnification control in accordance with digital zoom magnification, and the like on the image signal supplied from the image signal processing unit  34 . 
         [0074]    The disc interface  42  writes the compressed data supplied from the encoding/decoding unit  41  into the storage device  44 . In addition, the disc interface  42  reads the compressed data from the storage device  44  and supplies it to the encoding/decoding unit  41 . Note that the storage device  44  can be an optical disc such as DVD-R (Digital Versatile Disc Recordable) or BD (Blu-Ray Disc®). 
         [0075]    The output processing unit  45  is controlled by the main control unit  100  via a system bus  109 . The output processing unit  45  supplies the compressed data supplied from the encoding/decoding unit  41  to the control unit  10  and an editing device  200 . Herein, the editing device  200  can be, for example, an information processing device connected to the imaging device  1  via an output terminal of the output processing unit  45 . The user is able to edit image data, audio data, or the like using the editing device  200 . 
         [0076]    The buffer memory  46  includes, for example, SDRAM and is used as a work area for performing encoding or decoding with the encoding/decoding unit  41 . 
         [0077]    The control unit  10  is configured such that, as shown in  FIG. 7 , the main control unit  100 , ROM (Read Only Memory)  101 , RAM (Random Access Memory)  102 , an operation input interface  103  that receives an operation input from the operation input unit  20  or from the touch panel  12 , a display control unit  104  that controls the touch panel  12 , a memory card interface  105  to be loaded with a memory card  14 , a clock circuit  106  that generates time information for use in the recording of the shooting time or the like, and a projector control unit  108  that controls the projector module  18  are connected via the system bus  109 . 
         [0078]    The main control unit  100  manages the processing of the entire imaging device  1 , and uses the RAM  102  as a work area. In addition, the main control unit  100  performs control in accordance with an operation mode specified through a user&#39;s operation on the mode operation unit  24 . 
         [0079]    For example, when the operation mode is the shooting mode, the main control unit  100  stops power supply to the projector control unit  108  and the projector module  18 , and causes the touch panel  12  to display an image signal supplied from the image signal processing unit  34  via the display control unit  104 . 
         [0080]    Meanwhile, when the operation mode is the playback mode, the main control unit  100  stops power supply to the shooting unit  30 , and generates the playback screen P or the index screen I on the basis of a playback signal or thumbnails of image data supplied from the encoding/decoding unit  41 , and further causes the touch panel  12  to display the playback screen P or the index screen I via the display control unit  104 . 
         [0081]    In the ROM  101 , a program for controlling the shooting unit  30  and a program for executing recording control, playback control, and the like on image signals and audio signals are written. 
         [0082]    The operation input interface  103  transmits operation signals from the connected operation input unit  20  and touch panel  12  to the main control unit  100 . Note that the zoom operation unit  21 , the manual operation unit  22 , the still image capturing operation unit  23 , the mode operation unit  24 , the projection switching operation unit  25 , and the like are collectively referred to as the operation input unit  20 . 
         [0083]    The display control unit  104  performs control for displaying on the touch panel  12  the image signal supplied from the image signal processing unit  34 , the playback screen P or the index screen I generated by the main control unit  100 , and the like. 
         [0084]    The memory card interface  105  writes the compressed data supplied from the encoding/decoding unit  41  to the memory card  14 . In addition, the memory card interface  105  reads the compressed data from the memory card  14  and supplies it to the encoding/decoding unit  41 . 
         [0085]    The clock circuit  106  generates time information representing the year, month, date, time, hour, minute, second, and the like. 
         [0086]    A shake sensor  107  detects shake of the main body unit  4 . For example, when the operation mode is the shooting mode, the main control unit  100  sends a detection result obtained by the shake sensor  107  to the optical unit control unit  32 . Next, the optical unit control unit  32  corrects the shake by bending the optical axis by shifting shift lenses, which are included in the lens group forming the imaging optical unit  31 , vertically and horizontally in accordance with the detection result (optical shake correction). When the operation mode is the playback mode and when shake of the main body unit  4  is not detected by the shake sensor  107 , the main control unit  100  determines that the main body unit  4  is still, that is, in a state of being placed. 
         [0087]    The projector control unit  108  performs control for projecting a screen onto a projection screen  3  from the projector module  18 . On the basis of the control of the projector control unit  108 , the playback screen P or the index screen I, for example, is projected onto the projection screen  3  from the projector module  18 . In particular, the projector control unit  108  in accordance with this embodiment controls the start of projection in accordance with the direction that the main body unit  4  faces and the projection direction of the projector module. The details of the projection start control will be described in “2-2. Operation of Imaging Device” with reference to  FIGS. 8 and 9 . 
         [0088]    A set direction detection unit  110  detects the direction that the main body unit  4  faces on the basis of a detection result obtained by a gravity sensor  15 . Information indicating the direction that the main body unit  4  faces, which has been detected by the set direction detection unit  110 , is used for the projection start control described below. 
         [0089]    A panel angle detection unit  111  detects the open/close angle of the open/close unit  8  around the axis L 1  and the open/close angle of the open/close unit  8  around the axis L 2  on the basis of a detection result obtained by a panel angle sensor  19 . The main control unit  100 , on the basis of the open/closed state of the open/close unit  8  detected by the panel angle detection unit  111  and the direction that the touch panel  12  faces, determines the projection direction of the projector module  18  provided on the open/close unit  8 . Information indicating the projection direction is used for the projection start control described below. 
       2-2. Operation of Imaging Device 
       [0090]    Next, the operation of the imaging device  1  in accordance with this embodiment will be descried with reference to  FIGS. 8 and 9 .  FIG. 8  is a flowchart showing the operation process of the imaging device  1  in accordance with this embodiment.  FIG. 9  is a perspective view showing the posture of the imaging device  1  during projection in accordance with this embodiment. 
         [0091]    As shown in  FIG. 8 , the main control unit  100  starts projection of a screen from the projector module  18  via the projector control unit  108  when the shake sensor  107  has not detected shake of the main body unit  4  and thus has determined that the imaging device  1  is in a state of being placed (step S 302 /Yes), the set direction detection unit  110  has detected that the imaging optical unit  31  of the main body unit  4  faces upward and is placed in the vertical direction in which the imaging optical axis direction D 1  is vertical as shown in  FIG. 9  (step S 304 /Yes), and the panel angle detection unit  111  has detected that, provided that the rotation angle of the touch panel  12  provided on the open/close unit  8  about the rotation axis L 2  when the touch panel  12  faces upward and is placed horizontally is zero degree, the rotation angle is within ±45° (step S 306 /Yes). 
         [0092]    Herein, the projection start conditions shown in steps S 302  to S 306  above will be described. First, when projection with a projector is performed, it is assumed that a user places the imaging device  1  on a table or the like. Thus, if the main body unit  4  has been placed is detected in step S 302 . 
         [0093]    Next, the imaging device  1  is usually used while the imaging optical axis direction D 1  of the main body unit  4  is placed in the horizontal direction. Thus, in this embodiment, a case in which the imaging device  1  is used while the imaging optical axis direction D 1  of the main body unit  4  is placed in the vertical direction as shown in  FIG. 9  is used as a special trigger to control the start of projection. Thus, the condition of step S 304  is provided. 
         [0094]    Further, as projection from a projector is usually performed toward a vertical plane such as a wall or a screen, it is desired that the projection start control be performed when the projection direction is approximately horizontal. In addition, it is also desired that a user be able to select a projection screen, for example, by operating the touch panel  12  during the projection. Thus, it is desired that the projector module  18  provided on the open/close unit  8  be provided at a position where the projection direction D 2  is horizontal as shown in  FIG. 9  when the main body unit  4  is placed such that the imaging optical unit  31  faces upward and is placed in the vertical direction in which the imaging optical axis direction D 1  is vertical, and the open/close unit  8  is in a state of being open with respect to the main body unit  4  with the touch panel  12  facing outward (the touch panel  12  facing upward). 
         [0095]    Although the touch panel  12  shown in  FIG. 9  is placed horizontally, there may be cases in which a user would be able to operate the touch panel  12  more easily if it is tilted a little. Thus, projection is desirably performed even when, provided that the rotation angle of the touch panel  12  about the rotation axis L 2  when the touch panel  12  faces upward and is placed horizontally as shown in  FIG. 9  is zero degree, the rotation angle is within ±45°. Thus, the condition of step S 306  is provided. 
         [0096]    After projection is started in accordance with the conditions shown in steps S 302  to S 306  described above, when the shake sensor  107  has detected shake of the main body unit  4  and thus has determined that the imaging device  1  is in a state of being lifted (step S 310 /No), when the set direction detection unit  110  has detected a set direction of the imaging optical axis direction D 1  of the main body unit  4  other than the vertical, upward direction (S 312 /No), and when the panel angle detection unit  111  has detected that the touch panel  12  provided on the open/close unit  8  does not face upward and the rotation angle is not within ±45° (step S 314 /No), the main control unit  100  terminates the projection of a screen from the projector module  18  via the projector control unit  108 . 
         [0097]    Herein, even when the open/close unit  8  is more or less rotated while the touch panel  12  is operated, the projection is desirably continued. Thus, in step S 314  described above, the projection is not terminated as long as, provided that the rotation angle of the touch panel  12  about the rotation axis L 2  when the touch panel  12  faces upward and is placed horizontally as shown in  FIG. 9  is zero degree, the rotation angle is within ±45° (step S 314 /Yes). 
         [0098]    (Operation During Projection) 
         [0099]    Next, an operation unit when the imaging device  1  in accordance with this embodiment is projecting a screen will be described. In addition to an operation input received by the aforementioned touch panel  12 , a user&#39;s operation different from that in the shooting mode can also be received by the operation input unit  20 . For example, the zoom operation unit  21  shown in  FIG. 9  includes a lever that can be tiled to a wide position or a telephoto position, for example, as described above, and can receive a user&#39;s operation for enlarging or shrinking an image in the shooting mode. However, in the playback mode, when the index screen I shown in  FIG. 5  is projected, for example, it is also possible to select a thumbnail by moving the cursor  68  to a side to which the lever is tilted. 
         [0100]    Further, the imaging device  1  in accordance with this embodiment can receive a user&#39;s operation from an image captured by the imaging optical unit  31  of the imaging unit  30  in the playback mode. In this case, unlike in the shooting mode, the image captured by the imaging optical unit  31  is not recorded on the storage device  44  or displayed on the touch panel  12 . 
         [0101]    For example, when the imaging optical unit  31  has imaged a hand movement of a user as shown in  FIG. 10  while the index screen I shown in  FIG. 5  is projected, it is possible to select a thumbnail by moving the cursor  68  in the direction of the hand movement. Using the imaging optical unit  31  in this manner allows a gesture input. 
         [0102]    In addition, when the imaging optical unit  31  has imaged a face of a user, the main control unit  100  can recognize the face and calculate the feature of the face, and then extract an image containing a face with the same feature from the storage device  44  and display the image as a thumbnail. 
       3. SECOND EMBODIMENT 
       [0103]    Next, the imaging device  1  in accordance with the second embodiment of the present disclosure will be described with reference to  FIGS. 11 and 12 .  FIG. 11  is a flowchart showing the operation process of the imaging device  1  in accordance with this embodiment.  FIG. 12  is a perspective view showing the posture of the imaging device  1  during projection in accordance with this embodiment. 
         [0104]    As shown in  FIG. 11 , the main control unit  100  starts projection of a screen from the projector module  18  via the projector control unit  108  when the shake sensor  107  has not detected shake of the main body unit  4  and thus has determined that the imaging device  1  is in a state of being placed (step S 402 /Yes), the set direction detection unit  110  has detected that the imaging optical unit  31  of the main body unit  4  faces downward and is placed in the vertical direction in which the imaging optical axis direction D 1  is vertical as shown in  FIG. 12  (step S 404 /Yes), and the panel angle detection unit  111  has detected that, provided that the rotation angle of the touch panel  12  provided on the open/close unit  8  about the rotation axis L 2  when the touch panel  12  faces upward and is placed horizontally is zero degree, the rotation angle is within ±45° (step S 406 /Yes). 
         [0105]    Herein, the projection start conditions shown in steps S 402  to S 406  above will be described. First, the description of step S 402  will be omitted as it is similar to step S 302  described in the aforementioned [2-2. Operation of Imaging Device]. 
         [0106]    Next, the condition of step S 404  will be described. The imaging device  1  is usually used while the imaging optical axis direction D 1  of the main body unit  4  is placed in the horizontal direction. Thus, a case in which the imaging device  1  is used while the imaging optical axis direction D 1  of the main body unit  4  is placed in the vertical direction as shown in  FIG. 12  is used as a special trigger to control the start of projection. In addition, unlike in the aforementioned first embodiment, the imaging device  1  in accordance with this embodiment is set such that the imaging optical unit  31  of the main body unit  4  faces downward and is placed in the vertical direction in which the imaging optical axis direction D 1  is vertical. 
         [0107]    Further, as projection from a projector is usually performed toward a vertical plane such as a wall or a screen as described above, it is desired that the projection start control be performed when the projection direction is approximately horizontal. In addition, it is also desired that a user be able to select a projection screen, for example, by operating the touch panel  12  during the projection. Thus, it is desired that the projector module  18  provided on the open/close unit  8  be provided at a position where the projection direction D 2  is horizontal as shown in  FIG. 12  when the main body unit  4  is placed such that the imaging optical unit  31  faces downward and is placed in the vertical direction in which the imaging optical axis direction D 1  is vertical, and the open/close unit  8  is in a state of being open with respect to the main body unit  4  with the touch panel  12  facing inward (the touch panel  12  facing upward). 
         [0108]    Although the touch panel  12  shown in  FIG. 12  is placed horizontally, there may be cases in which a user would be able to operate the touch panel  12  more easily if it is tilted a little. Thus, projection is desirably performed even when, provided that the rotation angle of the touch panel  12  about the rotation axis L 2  when the touch panel  12  faces upward and is placed horizontally as shown in  FIG. 12  is zero degree, the rotation angle is within ±45°. Thus, the condition of step S 406  is provided. 
         [0109]    After projection is started in accordance with the conditions shown in steps S 402  to S 406  described above, when the shake sensor  107  has detected shake of the main body unit  4  and thus has determined that the imaging device  1  is in a state of being lifted (step S 410 /No), when the set direction detection unit  110  has detected a set direction of the imaging optical axis direction D 1  of the main body unit  4  other than the vertical, downward direction (S 412 /No), and when the panel angle detection unit  111  has detected that the touch panel  12  provided on the open/close unit  8  does not face upward and the rotation angle is not within ±45° (step S 414 /No), the main control unit  100  terminates the projection of a screen from the projector module  18  via the projector control unit  108 . 
         [0110]    Herein, even when the open/close unit  8  is more or less rotated while the touch panel  12  is operated, the projection is desirably continued. Thus, in step S 414  described above, the projection is not terminated as long as, provided that the rotation angle of the touch panel  12  about the rotation axis L 2  when the touch panel  12  faces upward and is placed horizontally as shown in  FIG. 12  is zero degree, the rotation angle is within ±45° (step S 414 /Yes). 
       4. CONCLUSION 
       [0111]    As described above, the imaging device  1  in accordance with the embodiments of the present disclosure automatically projects a screen in accordance with the direction that the main body unit  4  faces and the projection direction of the projector module  18 . Thus, it is possible to reduce the burden of the complex operation for starting projection for the user, and to simplify the operation for starting the projection. 
         [0112]    Although the preferred embodiments of the present disclosure have been described in detail with reference to the appended drawings, the present disclosure is not limited thereto. It is obvious to those skilled in the art that various modifications or variations are possible insofar as they are within the technical scope of the appended claims or the equivalents thereof. It should be understood that such modifications or variations are also within the technical scope of the present disclosure. 
         [0113]    For example, the steps in the process of the imaging device  1  in this specification need not necessarily be processed in a time-series order in accordance with the order described in the flowchart. For example, steps S 302 , S 304 , and S 306  in the process of the imaging device  1  shown in  FIG. 8  can be performed in an order different from that described in the flowchart, or be processed in parallel. 
         [0114]    It is also possible to create a computer program for causing built-in hardware in the imaging device  1  to exert a function that is equivalent to each configuration of the aforementioned imaging device  1 . In addition, a storage medium having the computer program stored therein is also provided.