JP2010068459A - Digital video display system, digital camera, and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital video display system that allows a subject taken by a digital camera to be displayed to have a normal posture on a display screen. <P>SOLUTION: A digital video display system 100 includes: a digital camera 1 having a housing, a lens, and a rotation angle detection means; and a display device 3 having a display screen and a display screen support means. The rotation angle detection means detects inclination angles α, β with respect to the horizontal direction during shooting. When the display screen displays photographed video data, the display screen support means tilts the display screen to a position rotated by the inclination angles α, β from a horizontal condition. This enables the video not taken in a horizontal condition to be looked in the same manner as when the video is taken in the horizontal condition in which the housing of the digital camera is not rotated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a digital video display system, and more particularly, to a digital video display system suitable for viewing an image shot in a non-horizontal state using a rotation angle detection means such as a sensor.

  Conventionally, video captured by a digital camera is converted into a digital signal and stored in a storage device. The user uses a software or the like to connect a monitor such as a computer or television to the digital camera and shoot with the digital camera. Systems that allow viewing and editing of recorded images are widely used.

  Here, when a picture is taken with the digital camera held horizontally, the picture of the stored picture frame is in a vertical state. Also, if the digital camera is held vertically and the video is shot, the video of the stored video frame is in a lying state. As a result, when this image is viewed by the display device, the image of the image frame is displayed on the display screen in a vertical or lying state according to the image angle at the time of shooting, and is not suitable for viewing.

  On the other hand, in Patent Document 1, for example, the tilt angle of a digital camera is detected during video shooting of the digital camera, the video frame of the video shot based on the detected angle is rotated, and the vertical direction of the subject during playback is determined. There is disclosed a video storage method for a digital camera that converts to a uniform storage format and stores the video in the same direction regardless of the rotation angle of the digital camera at the time of shooting.

  According to the method of Patent Document 1, a video frame of a shot video can be rotated and the format can be converted and saved so that the vertical direction of the subject is aligned during playback.

Also, in Patent Document 2, when each frame image constituting a moving image is captured, the tilt state of the digital camera is detected, and a vertical / horizontal flag indicating the detected tilt state is recorded in association with each frame image of the moving image. In addition, a technique is disclosed in which during playback of a moving image, each frame image is rotated based on a vertical / horizontal flag corresponding to each frame image to thereby correct the horizontal position of each frame image and reproduce it. Thereby, regardless of the shooting angle at the time of moving image shooting, the horizontal position of a series of moving images can always be reproduced in an easy-to-view manner according to the actual horizontal direction.
JP 2001-119665 A (published April 27, 2001) Japanese Patent Laying-Open No. 2006-212378 (released on August 10, 2006)

  However, in the methods of Patent Documents 1 and 2, since the video frame to be shot is rectangular in normal cases, for example, when the data is rotated 90 ° and stored, the aspect ratio of the video size is not uniform, Depending on the display method such as the screen display, the aspect ratio of the storage format and the display screen may not match, so if the display is in the storage format, blank space will appear on the display screen, or the video must be enlarged or cropped to eliminate the blank space. I had to. For this reason, there was a problem that the original video would be different.

  The present invention has been made in view of the above-described problems, and its purpose is to change the format of video data even when a photographer takes a picture while rotating the casing of the digital camera at an arbitrary angle. It is another object of the present invention to provide a digital video display system that can be viewed in the same manner as when a picture is taken in a horizontal state in which the casing of the digital camera is not rotated on the display screen.

  In order to solve the above problems, a digital video display system according to the present invention includes a digital camera and a display device, and displays video data of a video photographed by the digital camera on a display screen of the display device. The digital camera includes a housing, a lens, and a rotation angle detection unit. The optical axis direction when the optical axis direction of the lens is in the horizontal direction is defined as an X axis, and a horizontal direction orthogonal to the X axis is defined. Compared to the case in the horizontal state where the optical axis direction of the lens coincides with the X axis, the case is a clockwise rotation around the X axis of the case at the time of shooting viewed from the front. The rotation angle is α, and the counterclockwise rotation angle around the Y-axis of the housing at the time of shooting viewed from the left side of the housing forward is compared with the housing in the horizontal state. In the case of the degree β, the rotation angle detection means detects at least one of the angle α and the angle β, and the display device supports the display screen so as to be tiltable. The horizontal direction when the direction orthogonal to the display screen is in the horizontal direction is the x-axis, the horizontal direction orthogonal to the x-axis is the y-axis, and the direction orthogonal to the display screen is the x-axis When the display screen displays the video data when the horizontal frame of the display screen is horizontal and the horizontal state of the display screen is the horizontal support state, the display screen support means is configured to display the video data when viewed from the front of the display screen. A position obtained by rotating the display screen from the initial support state by an angle α counterclockwise about the x axis and an angle β counterclockwise around the y axis when viewed from the right toward the front of the display screen. It is characterized by supporting.

  According to the above configuration, when the digital camera is photographed with the angle α clockwise when viewed from the front about the X axis and the angle β rotated counterclockwise when viewed from the left of the housing about the Y axis The display screen instruction means of the display device is an angle α counterclockwise about the x axis when viewed from the front of the display screen, and an angle β counterclockwise about the y axis when viewed from the right toward the front of the display screen. The display screen is supported at the rotated position. As a result, even if a video that has not been format-converted is displayed on the display screen, when viewed from the front of the display screen in the initial support state, the video is in the same state as when the digital camera was photographed in a horizontal state. In this way, even when the photographer shoots with the digital camera casing rotated at an arbitrary angle, the digital camera casing is not rotated on the display screen without changing the video data format. It is possible to provide a digital video display system that can be viewed in the same manner as when shooting in a state. Moreover, since various expressions can be made by changing the display method without destroying the video data itself, entertainment can be added.

  In the digital video display system according to the present invention, in addition to the above configuration, the rotation angle detecting means is preferably an inclination sensor that detects at least one of the angle α and the angle β.

  With this configuration, since the rotation angle detection means can be realized with a simple structure called an inclination sensor, the cost can be saved.

  In the digital video display system according to the present invention, in addition to the above-described configuration, the display screen support means includes a support shaft, a movable joint portion, and a rotation control means, and the support shaft includes the movable joint. Preferably, the rotation control means is attached to the back surface of the display screen via a portion, and the display screen is tilted by rotating the movable joint portion.

  With this configuration, the display screen can be reliably rotated and supported up to a predetermined position with a simple structure.

  The digital camera according to the present invention is a digital camera comprising a housing, a lens, and a rotation angle detection means, wherein the optical axis direction when the optical axis direction of the lens is in the horizontal direction is the X axis, Compared to a case in a horizontal state where the horizontal direction perpendicular to the X axis is the Y axis and the optical axis direction of the lens coincides with the X axis, the X of the case at the time of photographing as viewed from the front A clockwise rotation angle about the axis is defined as an angle α, and the Y axis of the casing at the time of photographing when viewed from the left side of the casing toward the front as compared with the casing in the horizontal state. The rotation angle detection means detects at least one of the angle α and the angle β when the counterclockwise rotation angle is β.

  Further, a display device according to the present invention is a display device for displaying video data of a video photographed by the digital camera on a display screen, comprising display screen support means for tiltably supporting the display screen, wherein the display When the direction orthogonal to the screen is the horizontal direction, the horizontal direction is the x-axis, the horizontal direction orthogonal to the x-axis is the y-axis, the direction orthogonal to the display screen matches the x-axis, and When the horizontal state of the display screen is set to the initial support state, when the display screen displays the video data, the display screen support means is centered on the x-axis when viewed from the front of the display screen. Supporting the display screen at a position rotated from the initial support state by an angle α counterclockwise and an angle β counterclockwise around the y axis when viewed from the right toward the front of the display screen. Features.

  With the above configuration, even when the photographer shoots with the digital camera housing rotated to an arbitrary angle, the posture of the subject can be viewed as normal on the display screen, and the photographer shoots with the digital camera. The video can be displayed as it is on the display screen without converting the format, so the cost of converting the format can be saved, and various expressions can be created just by changing the display method without destroying the video data itself. Can be added.

  In the digital video display system according to the present invention, the digital camera includes a housing, a lens, and a rotation angle detection unit, and the optical axis direction when the optical axis direction of the lens is in the horizontal direction is an X axis, Compared to a case in a horizontal state where the horizontal direction perpendicular to the X axis is the Y axis and the optical axis direction of the lens coincides with the X axis, the X of the case at the time of photographing as viewed from the front A clockwise rotation angle about the axis is defined as an angle α, and the Y axis of the casing at the time of photographing when viewed from the left side of the casing toward the front as compared with the casing in the horizontal state. The rotation angle detection means detects at least one of the angle α and the angle β, and the display device tilts the display screen. Display screen support means to support When the direction orthogonal to the display screen is the horizontal direction, the horizontal direction is the x axis, the horizontal direction orthogonal to the x axis is the y axis, and the direction orthogonal to the display screen is the same as the x axis. In the case where the horizontal frame of the display screen is in the initial support state, when the display screen displays the video data, the display screen support means looks at the x from the front of the display screen. The display screen is rotated from the initial support state by an angle α counterclockwise around the axis, and an angle β counterclockwise around the y axis when viewed from the right toward the front of the display screen. To support.

  According to the above configuration, even when the photographer shoots with the digital camera casing rotated at an arbitrary angle, the digital camera casing is rotated on the display screen without changing the video data format. As a result, it is possible to provide a digital video display system that can be viewed in the same manner as when shooting in a horizontal state.

  In the digital camera according to the present invention, when the optical axis direction of the lens is in the horizontal direction, the optical axis direction is the X axis, the horizontal direction orthogonal to the X axis is the Y axis, and the optical axis of the lens is Compared with the case in a horizontal state whose direction coincides with the X axis, the clockwise rotation angle about the X axis of the case at the time of photographing viewed from the front is defined as the angle α, and the horizontal When the angle β is a counterclockwise rotation angle around the Y-axis of the case when viewed from the left side of the case toward the front as compared to the case in the state, the rotation angle The detecting means detects at least one of the angle α and the angle β.

  Further, the display device of the present invention includes display screen support means for supporting the display screen so as to be tiltable, and when the direction orthogonal to the display screen is in the horizontal direction, the horizontal direction is the x axis, and the x axis When the horizontal direction orthogonal to the y-axis is the y-axis, the direction orthogonal to the display screen coincides with the x-axis, and the horizontal frame of the display screen is horizontal, the initial support state is set. When displaying the data, the display screen support means rotates the angle α counterclockwise around the x axis when viewed from the front of the display screen, and the y axis when viewed from the right toward the front of the display screen. The display screen is supported at a position rotated from the initial support state by an angle β counterclockwise from the center.

  With the above configuration, even when the photographer shoots with the digital camera housing rotated to an arbitrary angle, the posture of the subject can be viewed as normal on the display screen, and the photographer shoots with the digital camera. The video can be displayed as it is on the display screen without converting the format, so the cost of converting the format can be saved, and various expressions can be created just by changing the display method without destroying the video data itself. Can be added.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of a digital video display system 100 according to the present invention. As shown in FIG. 1, a digital video display system 100 of the present invention includes a digital camera 1, a storage device 2, and a display device 3. The video data of the video shot by the digital camera 1 is stored in the storage device 2, the video data stored in the storage device 2 is read into the display device 3, and the display device 3 displays the display according to the video data. Do.

  FIG. 2 is a schematic perspective view of the digital camera 1 of the present invention. As shown in FIG. 2, the digital camera 1 includes a housing 11, a lens 12, a triaxial angle sensor (rotation angle detection means) 13, a data processing means 14, and a shutter 15. The triaxial angle sensor 13 and the data processing unit 14 are built in the housing 11.

  Here, when the optical axis direction of the lens is in the horizontal direction, the optical axis direction is the X axis, the horizontal direction orthogonal to the X axis is the Y axis, and the vertical direction orthogonal to the X axis and the Y axis is Z. Axis. Further, as compared with the case 11 in the horizontal state in which the optical axis direction of the lens 12 coincides with the X axis, the rotation angle of the case 11 about the X axis when the image is taken from the front when viewed from the front. Is the angle α. Furthermore, compared with the case 11 in the horizontal state, the rotation angle of the case 11 in the counterclockwise direction around the Y axis when shooting from the left direction of the case 11 toward the front is defined as an angle β. To do.

  At this time, the triaxial angle sensor 13 detects the angle α and the angle β. More specifically, the horizontal state is a state in which, when the casing 11 is a rectangular parallelepiped, the optical axis direction of the lens 12 coincides with the X axis, and the bottom surface of the casing 11 is in a horizontal state. means. The triaxial angle sensor 13 may detect any one of the angles α and β. In this case, a biaxial angle sensor or a uniaxial angle sensor may be provided instead of the triaxial angle sensor 13. For example, when the angle α around the X axis and the angle β around the Y axis are detected, an inclination sensor can be used instead of the triaxial angle sensor 13.

  In the present embodiment, the triaxial angle sensor 13 detects an angle α around the X axis and an angle β around the Y axis. FIG. 3 is a view of the posture of the digital camera 1 at the time of photographing as seen from the front of the lens, and shows a state in which the housing 11 is rotated from the horizontal state clockwise by the angle α around the X axis. .

  FIG. 4 is a view of the posture of the digital camera at the time of photographing when viewed from the left side of the housing 11 toward the front. The housing 11 is in a counterclockwise direction around the Y axis from the horizontal state by an angle β. An inclined state is shown. As described above, these two angles α and β are detected and measured by the three-axis angle sensor 13 built in the digital camera 1 of the present invention.

  The digital camera 1 shown in FIGS. 3 and 4 corresponds to a situation in which an object is photographed with a camera photographing posture inclined slightly from above to the right of the object to be photographed. For this reason, for example, when shooting an upright plant planted in a flower pot, as shown in FIG. 5, the image data obtained by shooting is in a tilted state.

  Further, the data processing means 14 adds the angle data detected by the three-axis angle sensor 13 when the subject is photographed by the digital camera 1 to the video data of the photographed video, and the storage device 2 Remember me.

  The storage device 2 may be a general-purpose device that can store video data, and is preferably a device that can be attached to and detached from the digital camera 1 such as an SD card.

  FIG. 6 is a block diagram illustrating a configuration example of the triaxial angle sensor 13, the data processing unit 14, and the storage device 2 of the digital camera 1. As shown in FIG. 6, the data processing unit 14 includes an X-axis rotation angle detection circuit 141, a Y-axis rotation angle detection circuit 142, an information addition circuit 143, and a control circuit 144. The detection angle output from the triaxial angle sensor 13 is input to the rotation angle detection circuit 141 around the X axis and the rotation angle detection circuit 142 around the Y axis. The X-axis rotation angle detection circuit 141 detects the angle α based on the detected angle output, and outputs angle data a indicating the angle α to the information addition circuit 143. The Y-axis rotation angle detection circuit 142 detects the angle β based on the detected angle output, and outputs angle data b indicating the angle β to the information addition circuit 143.

  Video data is input to the information addition circuit 143 together with the angle data a and the angle data b, and the information addition circuit 143 adds the angle data a and the angle data b to the video data to generate composite video data. . The composite video data is stored in the storage device 2 by the control circuit 144.

  As described above, the video processing unit 14 adds the angles α and β in the X and Y axes of the digital camera 1 to the video data when it is shot, and does not destroy the video area of the video data. Data can be created and saved.

  Next, the display device 3 of the present invention will be described with reference to FIGS.

  FIG. 7 is a schematic perspective view showing the display device 3 of the present invention. As shown in FIG. 7, the display device 3 includes a display screen 31, a support shaft 32 that supports the display screen 31, and a pedestal 33 that supports the support shaft 32. Here, when the direction orthogonal to the display screen 31 is the horizontal direction, the horizontal direction is the x axis, the horizontal direction orthogonal to the x axis is the y axis, and the vertical direction orthogonal to the x axis and the y axis is the z axis. And In FIG. 7, the display screen 31 is in a state where the direction orthogonal to the display screen 31 coincides with the x axis and the horizontal frame of the display screen 31 is horizontal. In the following description, this state is referred to as an initial support state.

  FIG. 8 is a side view of the display device 3 as viewed from the right direction toward the front. As shown in FIG. 8, a movable joint 34 is provided at the joint between the display screen 31 and the support shaft 32. Further, the display device 3 incorporates a rotation control means 35 (not shown in FIG. 8) for rotating the movable joint portion 34. The movable joint 34 has a rotation mechanism that rotates the display screen 31 around the x axis and the y axis. In addition to this, the movable joint 34 may be rotatable around the z-axis. FIG. 8 shows the orientation of the display screen 31 when the video imaged by the digital camera 1 is displayed on the display screen 31. Specifically, the display screen 31 rotates from the initial support state by an angle β counterclockwise (hereinafter referred to as “vertical rotation”) about the y axis when viewed from the right toward the front of the display screen 31. is doing.

  FIG. 9 is a front view of the posture of the display screen 31 as viewed from the front of the display screen 31 in the case where an image captured by the digital camera 1 is similarly displayed on the display screen 31. Specifically, the display screen 31 is rotated from the initial support state by an angle α counterclockwise (hereinafter referred to as “lateral rotation”) about the x axis as viewed from the front of the display screen.

  FIG. 10 is a diagram illustrating a state in which an image captured by the digital camera 1 is actually displayed on the tilted display screen 31 illustrated in FIG. 9. By supporting the display screen 31 in a state inclined at a predetermined angle in this way, the user is in a state where the plant planted in the flower pot is upright, that is, not rotated around the X axis and the Y axis. It can be viewed in the same state as the flower pot photographed by the digital camera 1 in the horizontal state. Further, the video displayed on the display screen 31 is displayed as it is without undergoing format conversion with respect to the video shot by the digital camera 1. Therefore, the cost for format conversion can be saved. Moreover, since various expressions can be made by changing the display method without destroying the video data itself, entertainment can be added.

  Next, a specific configuration of the rotation control means 35 that rotates the movable joint 34 will be described.

  FIG. 11 is a block diagram showing the display screen 31, the movable joint 34, the rotation control means 35, and the video processing circuit 36 of the display device 3 of the present invention. As shown in FIG. 11, the rotation control means 35 includes an angle information separation circuit 351, a housing position calculation circuit 352, a control circuit 353, and a housing position drive circuit 354.

  As described above, the storage device 2 stores the composite video data in which the angle data a and b indicating the angles α and β with respect to the X direction and the Y direction of the digital camera 1 at the time of shooting are added to the video data. . When the storage device 2 is attached to the display device 3, the composite video data is sent to the angle information separation circuit 351. The angle information separation circuit 351 separates the composite video data into video data and angle data a and b. The video data is sent to the video processing circuit 355 in the same way as normal video data, and the angle data a and b are sent to the housing position calculation circuit 352. At this time, the control circuit 353 can perform various processes such as decoration on the displayed video.

  In addition, state data indicating the current state of the movable joint 34 is input from the movable joint 34 to the housing position calculation circuit 352. For example, when the display screen 31 is currently rotated from the initial support state by an angle γ in the horizontal direction and an angle δ in the vertical direction, state data indicating the angles γ and δ is input to the housing position calculation circuit 352. The

  Based on the state data and the angle data a · b, the housing position calculation circuit 352 generates the horizontal angle ε and the vertical angle ζ necessary to bring the display screen 31 into the state shown in FIGS. Calculate This is because the current display screen displays the previous video data and does not always face in the horizontal direction, so the amount of movement is calculated in consideration of the current screen position.

  Specifically, the angle ε and the angle ζ are calculated by the following equations (1) and (2).

ε = α−γ Expression (1)
ζ = β−δ Formula (2)
Then, angle data indicating the angle ε · ζ calculated by the housing position calculation circuit 352 is input to the housing position driving circuit 354, and based on the angle data, the housing position driving circuit 354 causes the movable joint portion to move. 34 is driven to move the display screen 31 by a necessary angle. Thereby, the display screen 31 is supported in the state shown in FIGS. As a result, it is possible to view the same video as when taken with the digital camera 1 in a horizontal state that does not rotate around the X axis and the Y axis, and it is also possible to realize a highly entertaining display. is there.

  The housing position calculation circuit 352 can also be subjected to various processes by the control circuit 353. For example, the display screen 31 can be rotated so that the direction is different from the vertical line on the video. As a result, a display with higher entertainment properties can be realized.

  In the present embodiment, the composite video data is transferred from the digital camera 1 to the display device 3 by the storage device 2, but the present invention is not limited to this. For example, the composite video data may be transferred by connecting the digital camera 1 to a display device with a cable or the like.

  In the present embodiment, the rotation angle of the digital camera 1 is measured by the triaxial angle sensor or the tilt sensor, but the present invention is not limited to this. For example, when shooting with the digital camera 1 supported by a tripod or the like, the rotation angle of the digital camera 1 may be measured by detecting the state of the support portion of the digital camera 1. In the present embodiment, the display screen 31 is supported by the support shaft 32 and the pedestal 33, but is not limited thereto. For example, the display screen 31 may be suspended by connecting wires or the like to the four corners of the display screen 31, and the display screen 31 may be tiltably supported by the wires or the like.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The present invention can be applied to a digital video display system that accurately displays video captured by a digital camera on a monitor or the like.

1 is a block diagram of a digital video display system according to an embodiment of the present invention. It is a schematic perspective view of the digital camera of the digital video display system. It is the figure which looked at the posture at the time of photography of the above-mentioned digital camera from the lens front. It is the figure which looked at the attitude | position at the time of imaging | photography of the said digital camera from the left direction of the housing | casing toward the front. It is a figure which shows the image | video image | photographed in the state which the said digital camera inclined. It is a block diagram which shows the structural example of the 3-axis angle sensor of the said digital camera, a data processing means, and a memory | storage device. It is a schematic perspective view of the display apparatus of the digital video display system. It is the side view of the display apparatus seen from the right direction toward the front. It is a front view of the display apparatus seen from the front. It is the figure which showed a mode that the image | video shown in FIG. 5 was displayed on the tilted display screen shown in FIG. It is a block diagram which shows the structural example of the display apparatus by embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Digital video display system 1 Digital camera 2 Memory | storage device 3 Display apparatus 11 Case 12 Lens 13 3-axis angle sensor (Angle detection means)
14 Data processing means 15 Shutter 31 Display screen 32 Support shaft (display screen support means, support means)
33 Pedestal 34 Movable joint (display screen support means)
35 Rotation control means (display screen support means)

Claims (5)

In a digital video display system comprising a digital camera and a display device, and displaying video data of a video shot by the digital camera on a display screen of the display device,
The digital camera includes a housing, a lens, and a rotation angle detection unit,
The optical axis direction when the optical axis direction of the lens is in the horizontal direction is the X axis, and the horizontal direction orthogonal to the X axis is the Y axis,
Compared to the case in a horizontal state where the optical axis direction of the lens coincides with the X axis, the clockwise rotation angle around the X axis of the case at the time of photographing viewed from the front is an angle. α
When the angle β is a counterclockwise rotation angle around the Y axis of the case when shooting from the left side of the case toward the front as compared to the case in the horizontal state,
The rotation angle detection means detects at least one of the angle α and the angle β;
The display device includes display screen support means for supporting the display screen in a tiltable manner,
When the direction orthogonal to the display screen is the horizontal direction, the horizontal direction is the x-axis, the horizontal direction orthogonal to the x-axis is the y-axis,
When the direction orthogonal to the display screen coincides with the x-axis and the horizontal frame of the display screen is in the horizontal support state,
When the display screen displays the video data, the display screen support means has an angle α counterclockwise around the x axis as viewed from the front of the display screen, and from the right toward the front of the display screen. A digital image display system, wherein the display screen is supported at a position rotated from the initial support state by an angle β counterclockwise about the y axis as viewed.   2. The digital video display system according to claim 1, wherein the rotation angle detection means is an inclination sensor that detects at least one of the angle α and the angle β. The display screen support means includes a support shaft, a movable joint, and a rotation control means,
The support shaft is attached to the back surface of the display screen via the movable joint,
The digital video display system according to claim 1, wherein the rotation control unit tilts the display screen by rotating the movable joint portion. A digital camera comprising a housing, a lens, and a rotation angle detection means,
The optical axis direction when the optical axis direction of the lens is in the horizontal direction is the X axis, and the horizontal direction orthogonal to the X axis is the Y axis,
Compared to the case in a horizontal state where the optical axis direction of the lens coincides with the X axis, the clockwise rotation angle around the X axis of the case at the time of photographing viewed from the front is an angle. α
When the angle β is a counterclockwise rotation angle around the Y axis of the case when shooting from the left side of the case toward the front as compared to the case in the horizontal state,
The digital camera characterized in that the rotation angle detecting means detects at least one of the angle α and the angle β. A display device for displaying video data of a video shot by the digital camera according to claim 4 on a display screen,
A display screen support means for tiltably supporting the display screen;
When the direction orthogonal to the display screen is the horizontal direction, the horizontal direction is the x-axis, the horizontal direction orthogonal to the x-axis is the y-axis,
When the direction orthogonal to the display screen coincides with the x-axis and the horizontal frame of the display screen is in the initial support state,
When the display screen displays the video data, the display screen support means has an angle α counterclockwise around the x axis as viewed from the front of the display screen, and from the right toward the front of the display screen. The display device is characterized in that the display screen is supported at a position rotated from the initial support state by an angle β counterclockwise around the y axis as viewed.

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