Abstract:
The object of the present invention is to provide a digital camera capable of deciding display form of the multi-display optimally suited an external monitor on the basis of detecting pixel information of the external monitor connected to the digital camera. In one aspect of the present invention, a digital camera includes a memory that stores a plurality of image frames, a display that shows an image frame, an output means that outputs image data to an electric instrument, a multi-display forming means that shows simultaneously a plurality of image frames stored in the memory, an image selection means that selects a given image frame among the plurality of image frames of the multi-display shown on the display, and a controller that controls such that when the multi-display is shown on the display, only the given image data selected by the image selection means is output from the output means.

Description:
INCORPORATION BY REFERENCE  
       [0001]     The disclosures of the following priority applications are herein incorporated by reference:  
         [0002]     Japanese Patent Application No. 2003-309624 filed on Sep. 2, 2003;  
         [0003]     Japanese Patent Application No. 2003-309625 filed on Sep. 2, 2003.  
       BACKGROUND OF THE INVENTION  
       [0004]     1. Field of the Invention  
         [0005]     The present invention relates to a digital camera, and in particular to a way to display an image data on a large screen monitor connected to the digital camera through a network.  
         [0006]     2. Description of Related Art  
         [0007]     Until recently, image data shot or reproduced by a digital camera has been confirmed by a small LCD display attached by the digital camera. In order to confirm with a large screen, the digital camera can output either digital or analogue video signal to an ordinary domestic TV set. Recently, various wireless LAN methods have been proposed. Among them, UWB (Ultra Wideband) or IEEE802.11g for one of a short-range wireless communication method realizes a data transmission rate of 100 Mbps, so that the waiting time accompanying with a large amount of data transmission is drastically reduced. By connecting domestic instruments including these functions with a wireless LAN, it becomes possible to construct a new domestic network that has never been accomplished.  
         [0008]     Japanese Laid-Open Patent Application No. 2000-101915 discloses a reproduction device that expands and outputs an image signal of a designated program only based on a reproduction signal from a medium on which reduced images of a plurality of programs is stored in a frame. Japanese Laid-Open Patent Application No. 11-212755 discloses an image display device (scanner) including a display decision means that decides the number and the size of reduced images suitable for a monitor screen on the basis of information regarding input monitor screen. Japanese Laid-Open Patent Application No. 2001-16545 discloses an image reproduction device that outputs image signals suitable for an external display upon connecting the external display. Specifically, relative to a display form of a built in display, a display form of an external display becomes small in proportional to the display size. Moreover, it discloses that image signals providing to the built in display are made to be equal to those providing to an external display or the built in display is not shown.  
         [0009]     Output data from an ordinary digital camera is the same one shown on the LCD monitor of the digital camera, so that an image stored in the digital camera can merely be seen on an externally arranged large screen monitor. It cannot be said that the merit that there are two monitors and one of them has a large screen is effectively used.  
         [0010]     In the aforementioned prior art, regardless of the size of the external monitor connected to the digital camera, a fixed multi-display is simply output to the external monitor. Or, although information regarding the size of the external monitor is detected, the display form of the output multi-display is determined by detecting only the size or the aspect ratio of the display.  
       SUMMARY OF THE INVENTION  
       [0011]     The present invention is made in view of the aforementioned problems and has an object to provide a digital camera capable of deciding display form of the multi-display optimally suited an external monitor on the basis of detecting pixel information of the external monitor connected to the digital camera.  
         [0012]     An invention according to claim  1  includes a memory that stores a plurality of image frames, a display that shows an image frame, an output means that outputs image data to an electric instrument, a multi-display forming means that shows simultaneously a plurality of image frames stored in the memory, an image selection means that selects a given image frame among the plurality of image frames of the multi-display shown on the display, and a controller that controls such that when the multi-display is shown on the display, only the given image data selected by the image selection means is output from the output means. Accordingly, a multi-display is reproduced on an LCD monitor of the digital camera, and only an image data of one image frame selected from the displayed multi image frames, so that only a selected image frame can be displayed on the large screen of the external monitor.  
         [0013]     An invention according to claim  2  further includes a measuring means that measures a lapsed time after the image selection means selects the given image frame, and a detecting means that detects that the measured time measured by the measuring means passes a given time, wherein the control means controls such that when the detecting means detects that the lapsed time after the image selection means selects the given image frame has passed the given time, the image data of the given image frame selected by the image selection means is output from the output means. Accordingly, when a particular image data is to output to the external monitor, since the image data is output at a given time after selecting the image frame, only the image data to be output can be securely output to the external monitor.  
         [0014]     An invention according to claim  3  further includes a measuring means that measures a lapsed time after the image selection means selects the given image frame, and a detecting means that detects that the measured time measured by the measuring means passes a given time, wherein the control means controls such that the control means continues outputting the image data of the image frame shown on the display until the detecting means detects that the lapsed time has passed the given time. Accordingly, since a previous image frame is continuously shown for a given time after selecting a new image frame, a blank image frame does not shown on the display without showing a given time period.  
         [0015]     An invention according to claim  4  is characterized in that the output means outputs the image data to the electric instrument through a network. An invention according to claim  5  is characterized in that the image data is the whole image data of the image frames stored in the memory. An invention according to claim  6  is characterized in that the image data is the image data stored in the memory after thinned out with a given ratio.  
         [0016]     An invention according to claim  7  includes a memory that stores a plurality of image frames, a display that shows an image frame, an output means that outputs image data to an electric instrument, a multi-display forming means that shows simultaneously a plurality of image frames stored in the memory, an image selection means that selects a given image frame among the plurality of image frames of the multi-display shown on the display, a controller that controls the output means to output an image data of the given image frame selected by the image selection means, and an output selection means that selects either the image data of the given image frame selected by the image selection means or the image data of the multi-display to output from the output means upon showing the multi-display on the display. Accordingly, either the multi-display reproducing on the digital camera or an image frame selected from the multi-display can be selected as an output data for the external monitor.  
         [0017]     An invention according to claim  8  includes a memory that stores image frames, a display that shows an image frame, an output means that outputs image data to an electric instrument, a selection means that selects a given image frame among the image frames stored in the memory, a measuring means that measures a lapsed time after the selection means selects the given image frame, a detecting means that detects that the measured time measured by the measuring means passes a given time, and a control means that controls such that when the detecting means detects that the lapsed time after the selection means selects the given image frame has passed the given time, the image data of the given image frame selected by the selection means is output from the output means. Accordingly, when a particular image data is to output to the external monitor, since the image data is output at a given time after selecting the image frame, only the image data to be output can be securely output to the external monitor.  
         [0018]     An invention according to claim  9  includes a memory that stores image frames, a display that shows an image frame, an output means that outputs image data to an electric instrument, a selection means that selects a given image frame among the image frames stored in the memory, a measuring means that measures a lapsed time after the selection means selects the given image frame, a detecting means that detects that the measured time measured by the measuring means passes a given time, and a control means that controls such that the output means continues outputting the image data of the image frame shown on the display until the detecting means detects that the lapsed time has passed the given time. Accordingly, since a previous image frame is continuously shown for a given time after selecting a new image frame, a blank image frame does not shown on the display without showing a given time period.  
         [0019]     An invention according to claim  10  includes a first display that shows an image data, an interface that communicates data with a display means having a second display that shows an image data, a discrimination means that discriminates horizontal and vertical pixel in formation of the second display connected through the interface, and a setting means that sets the number of reduced image frames such that in a multi-display showing a plurality of image frames on the same image screen at a time, the number of the plurality of image frames is set to a given number of image data for the first display and is set to the number of reduced image frames based on the discrimination result of the discrimination means for the second display. Accordingly, in the display of the digital camera, the number of the multi-display is a given number. However, in the display means connected to the digital camera, the number of the multi-display can be optimally set in accordance with the information regarding the pixel number of the display means.  
         [0020]     An invention according to claim  11  further includes an output means that outputs from the interface the multi-display of the number of the image data selected either that of the given number set by the setting means or that based on the discrimination result of the discrimination means.  
         [0021]     An invention according to claim  12  further includes a instruction means that instructs the first display to show the multi-display having the same number of image data as the multi-display shown on the second display set by the setting means. Accordingly, the same number of image data as the multi-display of the external display can be shown on the display of the digital camera. An invention according to claim  13  is characterized in that the number of the image data of the multi-display shown on the second display is different from the given number of the image data.  
         [0022]     An invention according to claim  14  further includes an output means that outputs output data of the multi-display shown on the second display from the interface, and an off instruction means that instructs the first display to be off when the output means outputs output data. Accordingly, when the image data for the external monitor is output, user&#39;s confusion that the number of the multi-display shown on the digital camera is different from that of the external monitor can be prevented by making off the monitor of the digital camera.  
         [0023]     An invention according to claim  15  is characterized in that the interface communicates data with the display means through the network.  
         [0024]     An invention according to claim  16  includes a first display that shows an image data, an interface that communicates data with a display means having a second display that shows an image data, a discrimination means that discriminates horizontal and vertical pixel information of the second display connected through the interface, and a setting means that sets an arrangement of reduced image frames such that in a multi-display showing a plurality of image frames on the same image screen at a time, an arrangement of the plurality of image frames is set to a given arrangement of image data for the first display and is set to the arrangement of reduced image frames based on the discrimination result of the discrimination means for the second display. Accordingly, when an image frame with one of shorter sides at the top such as a cellular phone is shown on an ordinary TV monitor with long sideways, even if the same number of multi-display is shown, the best arrangement for the multi-display can be determined in response to the image frame with long sideways or one of shorter sides at the top such.  
         [0025]     An invention according to claim  17  further includes an output means that outputs from the interface the multi-display of the arrangement of the image data selected either that of the given arrangement set by the setting means or that based on the discrimination result of the discrimination means. An invention according to claim  18  further includes a instruction means that instructs the first display to show the multi-display having the same arrangement of image data as the multi-display shown on the second display set by the setting means. An invention according to claim  19  is characterized in that the arrangement of the image data of the multi-display shown on the second display is different from the given arrangement of the image data.  
         [0026]     An invention according to claim  20  further includes an output means that outputs output data of the multi-display shown on the second display from the interface, and an off instruction means that instructs the first display to be off when the output means outputs output data. Accordingly, when the image data for the external monitor is output, user&#39;s confusion that the number of the multi-display shown on the digital camera is different from that of the external monitor can be prevented by making off the monitor of the digital camera. An invention according to claim  21  is characterized in that the interface communicates data with the display means through the network.  
         [0027]     Other feature and advantages according to the present invention will be readily understood from the detailed description of the preferred embodiments in conjunction with the accompanying drawings. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0028]      FIG. 1  is a block diagram showing the construction of a digital camera according to the present invention.  
         [0029]      FIG. 2  is a drawing showing a display example of a digital camera and an external monitor according to the present invention.  
         [0030]      FIG. 3  is a flow chart explaining a reproduction movement of a digital camera according to the present invention.  
         [0031]      FIG. 4  is a flow chart explaining a display movement of a digital camera and an external monitor according to the present invention.  
         [0032]      FIG. 5  is a flow chart explaining a display movement of a digital camera and an external monitor according to the present invention.  
         [0033]      FIG. 6  is a flow chart explaining a display movement of a digital camera and an external monitor according to the present invention.  
         [0034]      FIG. 7  is a flow chart explaining a display movement of a digital camera and an external monitor according to the present invention.  
         [0035]      FIG. 8  is a timing chart of image display according to the present invention.  
         [0036]      FIG. 9  is a drawing showing another display example of a digital camera and an external monitor according to the present invention. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0037]     Each embodiment of the present invention is explained below with reference to accompanying drawings.  
         [0038]      FIG. 1  is a block diagram showing major functions of a digital camera  1  according to the present invention.  
         [0039]     An imaging portion  101  for imaging a subject is composed of an imaging lens, an aperture stop, a shutter, an imaging device, a driver for driving the imaging device, and the like. Here, the imaging device is a photoelectric imaging device using a CCD or MOS type solid-state imaging device for outputting an electric signal corresponding to the image intensity of an image of the subject formed on an imaging plane of the imaging device. An imaging signal from the imaging portion  101  is transformed by an A/D converter  102  into a digital signal and is stored temporally in a buffer memory  103 . The buffer memory  103  can simultaneously store image data for a plurality of image frames shot by the imaging portion  101 . The imaging signal is performed processing such as edge enhancement, gamma correction, color correction and the like, as well as compression/expansion processing upon storing/reproducing by a processor  105  in accordance with an instruction by a CPU  104 . The processed data is also stored temporally in the buffer memory  103 . The image data compressed by the processor  105  is stored if necessary in a memory card  106  removably loaded in the digital camera. The image data shot by the imaging portion  101  transferred by the A/D converter  102  into a digital signal is displayed on an LCD (liquid crystal display) monitor  107 . The LCD monitor  107  is used also for displaying image data stored in the memory card  106  upon reproducing. The shot/reproduced image data is transferred also to an external display through an interface  108 . The connection with the external display upon transferring the image data may be the one using a cable such as USB, IEEE1394, and the like, or the one using a wireless connection such as wireless LAN, Bluetooth, and the like. In the embodiment of the present invention, it is assumed that a digital camera and each electric instrument such as a TV monitor, and the like placed in each room is connected by a domestic wireless LAN. Among these electric instruments, those whose powers are on detect ID (identification information) of each other and are able to send/receive data in accordance with a predetermined procedure. When a plurality of instruments are detected, an instrument to be sent/received data is selected in accordance with a predetermined priority. An operating member  109  includes a shutter release button for instructing a start of shooting and is explained later at length in  FIG. 2 . CPU  104  controls whole sequence of the digital camera  1  upon shooting/reproducing. Moreover, the CPU  104  has a counter  1041  for counting a lapsed time from a selection of an image frame upon reproducing image data. This function is explained later in detail.  
         [0040]     An example of display according to the present invention is explained with reference to  FIG. 2 , when the digital camera  1  is connected to an external large display  2 . In  FIG. 2 , the same member as in  FIG. 1  is attached the same reference number. The external large display (external monitor)  2  may be a domestic TV monitor or a TV set with a large display  201 . The TV set directly receives the data from the digital camera  1  by an antenna  202  with a protocol of a wireless LAN as well as receives an ordinary television program. Alternatively, a control server for controlling whole domestic network may be set up in order to communicate various data between each instrument through the server.  
         [0041]     The external appearance of the digital camera  1  is explained. The above-described operating member  109  is constructed at least by respective buttons denoted by reference numbers  1091  through  1095 .  1091  denotes a shutter release button for instructing to start shooting.  1092  denotes a select dial for selecting a storing mode or a reproduction mode.  1093  denotes a multi-selector for moving a cursor up, down, right or left on various menu items, which are shown on the display by pressing a menu display button  1094 , in order to set and decide the item or function shown on the menu. The multi-selector  1093  may be used as various manners such as zooming in/out upon shooting, renewing a reproducing frame upon reproducing, selecting an image frame from multi-display images, or zooming in/out for a reproducing image frame.  1095  denotes a multi-display switching button for switching whether multi-frames or a single frame is displayed on the LCD monitor.  1061  denotes a slot for the memory card  106 .  1081  denotes an antenna for transmitting various data to external monitors with a protocol of a wireless LAN. As an embodiment of the present invention, in  FIG. 2 , a right lower frame surrounded with a bold line (the frame number  4  is displayed in  FIG. 2 ) among 4 frames of multi-display image displayed on the LCD monitor  107  is selected, and the image data of the selected frame is transmitted to the TV monitor  2  to be displayed on the large display  201 .  
         [0042]     The procedure of the present invention is explained with reference to flow charts shown in  FIGS. 3 through 7 .  FIG. 3  is a flow chart showing an outline of a movement of the digital camera  1  according to the present invention upon connecting an external monitor  2 . In step S 11 , whether the power switch of the digital camera is on or not is confirmed. When the power is on, the flow proceeds to step S 12 . In step S 12 , whether or not the digital camera  1  is connected with an external monitor  2  is checked by confirming the aforementioned identification information. The manner of connection may be either a wire connection or a wireless connection. When the digital camera  1  is not connected, the flow proceeds to step S 13 . In step S 13 , whether the power has been off or not is checked. When the power has been off, the flow proceeds to the end. When the power has not been off, the flow returns to step S 12 . In step S 12 , whether or not the digital camera  1  is connected with an external monitor  2  is checked. On the way to the loop of steps S 12  and S 13  when an external monitor  2  is not connected, the digital camera  1  independently carries out shooting or reproducing, but it is not necessary for the explanation of the present invention, so that the explanation is omitted.  
         [0043]     In step S 12 , when it is confirmed that the digital camera  1  is connected with an external monitor  2 , the flow proceeds to step S 14 . In step S 14 , the digital camera  1  reads out information regarding the external monitor  2  such as the numbers of vertical and horizontal pixels, the aspect ratio, and the like. In step S 15 , whether or not the reproduction mode is selected by the select dial  1092  is checked. When the shooting mode is set, the flow proceeds to step S 16 . In step S 16 , shooting procedure is carried out. When the reproduction mode is set, the flow proceeds to step S 17 . In step S 17 , a display mode for selection frame or multi-frames display of the external monitor  2  or the LCD display  107  is set upon reproduction mode. The specific contents of the display mode are explained in step S 18 . In the display mode, in order to switch the display of the LCD monitor  107  from a single frame display to a multi-frames display, the aforementioned multi-display switching button  1095  is to be pressed. The other display modes are set by selecting the selection menu, which is shown on the LCD monitor  107  by pressing the menu display button  1094  and the contents of which are explained later in step S 19 , with the multi-selector  1093 .  
         [0044]     In step S 18 , in accordance with the display mode of the reproduction mode set in step S 17 , a reproduced image is displayed on the LCD monitor  107  or a given image data is shown on the external monitor  2 . The detail of the reproduction on the monitor in step S 18  is explained with reference to  FIGS. 4 through 7 . In step S 19 , whether or not the power switch of the digital camera  1  is off is checked. When the power switch is not off, the flow returns to step S 15 . When the power switch is off, the flow proceeds to the end.  
         [0045]     The reproduction on the monitor shown in step S 18  in  FIG. 3  is explained with reference to  FIGS. 4 through 7 . At first, in step S 101  in  FIG. 4 , whether the multi-frames display on the LCD monitor  107  is set by pressing the multi-display switching button  1095  is confirmed. When the multi-frames display is set, the multi-frames display of 4 frames as shown in  FIG. 2  is displayed on the LCD monitor  107 , and then the flow proceeds to S 109  in  FIG. 5 . In this case, the number of frames shown in the multi-frames display can be set by the multi-selector  1093  to the other numbers such as 9 or the like.  
         [0046]     When the multi-frames display is not set, the flow proceeds to step S 102 . In step S 102 , the counter  1041  explained in  FIG. 1  is reset, and whether a given lapsed time from a single frame display has been passed is checked. When a given lapsed time has not been passed, the flow proceeds to step S 106 . When a given lapsed time has been passed, the flow proceeds to step S 105 . In step S 105 , the same image data shown on the LCD monitor  107  is output to the external monitor  2 . In step S 106 , whether the selection of the next image frame is carried out or not is checked. The selection is carried out by the up/down function of the multi-selector  1093 . When the next image frame is selected, the flow returns to step S 102 , and the counter  104  is reset. When the next image frame is not selected, the flow proceeds to step S 107 . In step S 107 , whether the multi-frames display on the LCD monitor  107  is set or not is checked again. When it is confirmed that the multi-frames display is set, the flow proceeds to step S 109  in  FIG. 5 . When it is confirmed that the multi-frames display is not set, the flow proceeds to step S 108 . In step S 108 , whether the select dial  1092  is set to other than the reproduction mode is checked. When the reproduction mode is continuously set, the flow returns to step S 103  to show the selected image on the LCD monitor  107  continuously. In step S 108 , when it is confirmed that the reproduction mode has been finished, the flow proceeds to the end.  
         [0047]     In this manner, the reproduction image of a single frame is displayed successively on the LCD monitor  107  in response to up/down operation of the multi-selector  1093 . However in the large display  201  of the external monitor  2 , even if a next image is selected within a predetermined time, the image is not shown. The display mode is explained with reference to  FIG. 8 . In  FIG. 8 , the upper chart shows image display timing of the LCD monitor  107 . The lower chart shows that of the external monitor  2 . In  FIG. 8 , image A starts being shown on the external monitor  2  a predetermined time (T) after selecting the image A. Then, the image A is continuously shown on the external monitor  2  because the predetermined time (T) does not have passed after selecting an image B, or C. Then, the displayed image on the external monitor  2  changes from A to D the predetermined time (T) after selecting an image D. Accordingly, restlessness that reproduced image is changed one after another on the external monitor  2  can be prevented. Moreover, since image data disinclined to show is actually not transmitted, the camera movement and network line can be used effectively. Here, although the predetermined time (T) is preferably about 0.5 second, the value should be changeable according to the user. The value can be easily set by the menu display button  1094  or the multi-selector  1093 .  
         [0048]     In step S 101  or S 107 , when it is confirmed that the multi-frames display is set by the multi-display switching button  1095 , the flow proceeds to step S 109  in  FIG. 5 . In step S 109 , whether it is set that the same multi-display shown on the LCD monitor  107  is output to the external monitor  2  or that a single frame selected from the multi-display shown on the LCD monitor  107  is output to the external monitor  2  is checked. This setting is carried out by selecting an item “select external monitor output” (not shown) among select menu items that are shown by pressing the menu display button  1094 . After the selection, since two items “output multi-display” and “output selected frame” are displayed (not shown), the setting is completed by selecting either one. The multi-selector  1093  is used for the setting. When “output selected frame” is selected, the flow proceeds to step S 115 . When “output multi-display” is selected, the flow proceeds to step S 110 . In step S 110 , in order to show multi-display on the LCD monitor  107  and the external monitor  2 , multi-display data for respective image displays is formed. This step S 110  is explained later in detail with reference to  FIG. 7 . In step S 111 , whether instruction for renewing the multi-display on the LCD monitor  107  or the external monitor  2  has been made or not is checked. As an example for renewing the multi-display, by using the multi-selector  1093  shown in  FIG. 2 , the image frame selection cursor (bold frame surrounding the frame number  4  in  FIG. 2 ) is brought to upper left frame or lower right frame, and is further moved the same direction, then newly 4-frame image or 9-frame image is displayed. When the instruction for renewing is made in this manner, the flow returns to step S 110  to show multi-display on the LCD monitor  107  or the external monitor  2 . When the instruction for renewing is not made in step S 111 , the flow proceeds to step S 112 . In step S 112 , whether the display mode is changed to a single frame display by the multi-display switching button  1095  is checked. When the setting is still multi-display mode, the flow returns to step S 109 . When it is confirmed that the display mode is changed to the single frame display, the flow proceeds to step S 113 . In step S 113 , whether the power of the LCD monitor  107  is off or not is checked. Although this is explained in detailed explanation of the step S 110  in  FIG. 7 , there happens the case that the power of the LCD monitor  107  is off. When the power is off, the flow proceeds to step S 114  to make on the power. When the power is on, the flow returns to step S 102  in  FIG. 4 .  
         [0049]     In step S 109 , when it is set such that a single frame selected from the multi-display is to output to the external monitor  2 , the flow proceeds to step S 115  in  FIG. 6  to form multi-display for displaying on the LCD monitor  107 . In step S 116 , a cursor for selecting a given image frame is superposed on the formed multi-display and is shown on the LCD monitor  107 . An example is shown in  FIG. 2 . Normally, in the initial image displayed as a multi-display, upper left frame (frame number  1  in this figure) is surrounded with a bold frame indicating as selected. However,  FIG. 2  shows the case that frame number  4  is selected by the multi-selector  1093 . In step S 117 , the counter  1041  is reset as the same as step S 102 . In step S 118 , whether the selected frame surrounded with a bold cursor is selected for a given time or not is checked. When the given time has not been lapsed as the same reason as step S 104 , the flow proceeds to step S 120 . When the given time has been lapsed, the flow proceeds to step S 119 . In step S 119 , the image data selected by the cursor is output to the external monitor  2 . In step S 120 , whether a next image frame is selected by the multi-selector  1093  or not is checked. When a next image frame is selected, the flow returns to step S 116  to show multi-display with different cursor position. When a next image frame is not selected, the flow proceeds to step S 121 . In step S 121 , whether the instruction for renewing the multi-display is made or not is checked.  
         [0050]     When the instruction for renewing is made, the flow returns to S 115  to form a new multi-display for the LCD monitor  107 . When the instruction for renewing is not made, the flow proceeds to step S 122 . In step S 122 , similar to the aforementioned step S 109 , whether it is set that the same multi-display shown on the LCD monitor  107  is output to the external monitor  2  is checked. When the setting is changed to output the multi-display, the flow returns to step S 110  to proceed to the sequence for outputting the multi-display to the external monitor  2 . When the setting is not changed, the flow proceeds to step S 123 . In step S 123 , whether the setting for the multi-display of the LCD monitor  107  is changed or not is checked. When the setting is changed, the flow returns to step S 102  for outputting a single image frame. When the setting is not changed, the flow proceeds to step S 124 . In step S 124 , whether the reproduction mode has been completed or not is checked. When it is confirmed that the reproduction mode has been completed, the flow proceeds to the end. When it is confirmed that the reproduction mode has not been completed, the flow returns to step S 118  to repeat the flow for outputting selected image frame to the external monitor  2 .  
         [0051]     The above-mentioned sequence makes it possible to carry out multi-display on the LCD monitor  107  as well as to carry out a single frame display on the external monitor  2  by selecting a single frame among the reduced images of the multi-display shown on the LCD monitor  107 . Accordingly, even if you are showing a single image frame on a large screen of the external monitor  2 , you can confirm what images are stored in addition to this by the LCD monitor of the digital camera. In this case also, when you move the cursor for selecting another image frame within a short time period, a selected image frame before moving the cursor is not output to the external monitor  2 . In a digital camera capable of shooting movie, when a movie and a typical image frame representing its contents or literal data indicating the stored contents are stored together in a memory card  106 , the typical image frame or literal data may be displayed in a list on the LCD monitor  107  while displaying a selected movie on the external monitor  2 .  
         [0052]     Then, forming and outputting a multi-display on the LCD monitor  107  and the external monitor  2  in step S 110  in  FIG. 5  is explained with reference to  FIG. 7 . In step S 130 , whether it is set that the same multi-display image data showing on the LCD monitor  107  is shown on the external monitor  2  is checked. Although this setting can be set in advance by using the menu display button  1094  and the multi-selector  1093 , either case may be set by default in advance. When it has been set that the same multi-display as the LCD monitor  107  is output to the external monitor  2 , the flow proceeds to step S 131 , otherwise to step S 132 . In step S 132 , the numbers of pixels of horizontal and vertical direction of the connected external monitor  2  are identified from the external monitor information read out in step S 14  in  FIG. 3 . In step S 133 , an arrangement of reduced image frames and the number of frames in the multi-display shown on the large screen  201  of the external monitor  2  are determined in accordance with the identified numbers of pixels.  
         [0053]     In step S 134 , whether the arrangement and the numbers of pixels determined in step S 133  are different from those shown on the LCD monitor  107  or not is checked. When they are the same, the flow proceeds to step S 131 , otherwise to step S 135 . In step S 135 , whether the power of the LCD monitor  107  is on or not is checked. When the power is on, since the display content of the LCD monitor  107  is different from that of the external monitor  3 , the user may confuse upon selecting an image frame by the multi-selector  1093 . In order to prevent this, in step S 136 , the display of the LCD monitor  107  is off, and in step S 137 , the multi-display image data for the external monitor  2  is output. In step S 134 , when the multi-display image of the LCD monitor  107  is the same as that of the external monitor  2 , the flow proceeds to step S 131 . In step S 131 , the multi-display image for the LCD monitor  107  is formed, and, in step S 138 , the same multi-display image data as the LCD monitor  107  is output to the external monitor  2 .  
         [0054]     An example of multi-display described above is shown in  FIG. 9 . In  FIG. 9 , the digital camera  1  is the same digital camera explained in  FIG. 2 . An external monitor  3  is different from the external monitor  2  in  FIG. 2  and is the one that has a large screen with long sideways. The digital camera  1  displays 2 by 3, 6-image frames on the external monitor  3  on the basis of the vertical and horizontal pixel numbers relative to 2 by 2, 4-image frames on the LCD monitor  107  in  FIG. 2 . Moreover, 4-image frames of a reduced multi-display shown in  FIG. 2  is naturally displayed on the LCD monitor  107  of the digital camera  1 . However, while the external monitor  3  is connected, the digital camera outputs image data for 6 image frames to the external monitor  3  and its LCD monitor  107  is off as shown in  FIG. 9 . In this manner, when the number of image frames displayed on the external monitor is different from that displayed on the LCD monitor, although it is natural that the display arrangement is different in each cases, there is a case that even if the number of image frames to be displayed is not different, the arrangement becomes different. For example, it is the case that an image screen of a cellular phone having one of shorter sides at the top is displayed on a image screen having long sideways of an ordinary TV monitor. In this case also, the LCD monitor of the cellular phone had better be off.  
         [0055]     Additional advantages and modification will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.