JP2010003260A - Display processor, method for controlling the same, control program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain a display processor for allowing a user to intuitively obtain a display content without deteriorating the visibility of the user. <P>SOLUTION: A map display device 100 having a lid body 102 with a display screen arranged therein and a body 101 rotatably connected with the lid body 102 includes: a projection angle calculating part 11 for acquiring a screen angle (a relative angle) formed of the display screen with respect to the body 101 from an angle detecting part 2, and calculating a projection angle being an angle of a viewpoint for catching a 3D object in a space including the 3D object based on the acquired screen angle according to a prescribed angle calculation rule; and a 3D drawing part 12 for projecting the 3D object based on the calculated projection angle, and generating screen display data displayed on the display screen. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display processing device that displays an object in 2D or 3D, a control method for a display processing device, a control program, and a recording medium.

  2. Description of the Related Art Conventionally, in a display processing device that displays information in 2D or 3D, a device has been devised that changes the display method of a display object (object) according to the movement, orientation, or angle of the housing of the display processing device. Yes.

  For example, Patent Document 1 discloses a display processing device that displays a 2D object in conjunction with the angle of a housing. More specifically, when the main body and the screen display unit are an integrated portable personal computer and the opening / closing angle of the screen display unit is a certain angle or less, the display content is displayed in the forward direction that the operator sees, A portable personal computer that displays display contents in the reverse direction when the angle is equal to or greater than a certain angle is disclosed.

  Further, not only the 2D object but also the display method of the 3D object can be changed according to the angle of the housing.

  For example, in Patent Document 2, a rotation angle around the x, y, and z axes of a housing is acquired, and a viewpoint is set in an object space that is a virtual three-dimensional space based on the rotation angle of the housing. A portable image generation device that displays an image from a virtual camera on a screen as an object image is disclosed. That is, according to the portable image generation device of Patent Document 2, the virtual viewpoint position of the 3D object is changed in conjunction with the inclination of the housing in the real space.

In this way, portable image generation that enables intuitive grasp of display content by interlocking the rotation angle of the housing in the real space with the virtual viewpoint position of the object displayed on the display unit An apparatus can be realized.
JP 2002-132385 (released on May 10, 2002) JP 2002-298160 (released on October 11, 2002)

  However, in the configuration of Patent Document 2, the rotation angle of the casing for determining the virtual viewpoint position of the 3D object is an absolute angle of the casing in the real space. Even in the case of rotation, the display angle (display content) of the 3D object is changed. Therefore, every time the casing rotates against the user's intention, the display content is changed rapidly, which causes a problem that it is difficult for the user to check the display content.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display processing device and a display process that allow a user to intuitively grasp display contents without impairing the visibility of the user. An object is to realize an apparatus control method, a control program, and a recording medium.

  In order to solve the above problems, a display processing apparatus according to the present invention is a display processing apparatus including a display body provided with a display screen and a base body rotatably connected to the display body. An angle acquisition unit that acquires the screen angle formed by the display screen with respect to the base body from an angle detection unit, and the 3D object in a space including the 3D object based on the screen angle acquired by the angle acquisition unit. A projection angle calculation unit that calculates a projection angle that is an angle of a viewpoint to be captured according to a predetermined angle calculation rule, and the 3D object is projected based on the projection angle calculated by the projection angle calculation unit, and the display screen And 3D rendering means for generating screen display data for display on the screen.

  According to the said structure, an angle detection part detects the screen angle which is a relative angle which the said base | substrate and the said display screen comprise, and an angle acquisition means acquires it. The projection angle calculation means calculates the projection angle based on the screen angle acquired by the angle acquisition means. The projection angle is an angle of a viewpoint for capturing the 3D object in a space including the 3D object. The projection angle calculation means calculates a projection angle corresponding to the screen angle according to a predetermined angle calculation rule.

  Subsequently, the 3D drawing unit projects and draws the 3D object based on the projection angle calculated by the projection angle calculation unit. Then, screen display data to be displayed on the display screen is generated.

  Thereby, the angle of the viewpoint of the 3D object displayed on the display screen, that is, the stereoscopic image, is determined according to the relative angle between the display screen provided on the display body and the base. Is projected and drawn. Therefore, since the projection angle does not change due to the movement of the base (the display processing apparatus itself), the display content does not change. Only when the relative angle between the substrate and the display body (display screen) moves, the projection angle is changed according to the angle, and the display content changes.

  As a result, if the angle between the base and the display body (display screen) is fixed, the display content can be prevented from changing rapidly even if the entire display processing apparatus moves, and the visibility of the user can be reduced. Is not impaired. In addition, since the appearance of the 3D object can be changed by changing the projection angle according to the relative angle between the base and the display screen, the user can intuitively grasp the display content (3D object). It becomes possible to.

  As described above, even when the display processing device is moved against the user's intention, it is possible to prevent the user's visibility from being impaired and to enable the user to intuitively understand the display content. Play.

  For example, as disclosed in Patent Document 2, in a portable display processing apparatus, it is assumed that a user confirms display contents while carrying around. However, even if the technique of Patent Document 2 is applied to a portable display processing device, the display content is changed rapidly each time the display processing device moves, and it becomes difficult for the user to check the display content. Therefore, if the display processing device of the present invention is applied to a portable display processing device, it is possible to prevent the visibility from being impaired even when the user confirms the display contents while carrying the device, so that the effect is particularly great. .

  In the display processing device, a display screen is further provided on the base. The display processing device further includes 2D drawing means for generating screen display data of a 2D object corresponding to the 3D object, and the 2D The drawing means preferably outputs the generated screen display data of the 2D object to the display screen of the base.

  According to the above configuration, the 3D object projected and drawn based on the screen angle is displayed on the display screen of the display body, and the 2D object corresponding to the 3D object is displayed on the display screen of the base.

  As a result, it is possible to enjoy both the advantages of stereoscopic display of the object and the advantages of planar display. Furthermore, with regard to stereoscopic display, the projection angle is adjusted according to the screen angle, so that the user can intuitively grasp, and visibility is not impaired.

  The display processing apparatus includes object display control means for instructing each drawing means to draw a 2D object or a 3D object, and the object display control means includes the display in the space including the 3D object. When specifying the region of the 3D object to be displayed on the display screen of the body and the region of the 2D object to be displayed on the display screen of the substrate among the planes including the 2D object, the display of the substrate In consideration of the positional relationship between the screen and the display screen of the display body, adjacent areas are specified, and the specified 3D object area is drawn to the 3D drawing means. It is preferable to instruct the 2D drawing means to draw the area.

  According to the above configuration, the object display control unit specifies two drawing targets, that is, the 3D object to be drawn by the 3D drawing unit and the 2D object to be drawn by the 2D drawing unit, and instructs each drawing unit.

  More specifically, for the 3D drawing unit, the region of the 3D object to be displayed on the display screen of the display body is specified in the space including the 3D object, and the 2D drawing unit is The region of the 2D object to be displayed on the display screen of the base is specified from the plane including the 2D object.

  Here, the space including the 3D object corresponds to the plane including the 2D object. Then, the object display control means specifies each area so that the area specified in the space and the area specified in the plane are adjacent to each other. As to how they are adjacent to each other, the physical positional relationship between the display screen of the display body and the display screen of the substrate is taken into consideration.

  As a result, the 3D drawing unit projects and draws the specified space area, and as a result of the 2D drawing means drawing the video displayed on the display screen of the display body and the specified plane area. The video displayed on the display screen is continuous and displayed so as to be connected.

  Therefore, the user can enjoy the respective merits of 2D display and 3D display, and can visually recognize the entire object, thereby improving the visibility of the user.

  The 3D object is 3D map data for displaying a map three-dimensionally, the 2D object is 2D map data for displaying a map in a plane, and the object display control means Each area may be specified so that the area of 3D map data to be drawn by the drawing means and the area of 2D map data to be drawn by the 2D drawing means are continuous.

  Thereby, the projected three-dimensional map is displayed on the display screen of the display body in consideration of the screen angle, and the planar map is displayed on the display screen of the base. The three-dimensional map and the planar map are displayed in a continuous state.

  Therefore, the user can enjoy both the merit of the three-dimensional map and the merit of the planar map and visually recognize the map. Therefore, the visibility of the user when browsing the map can be improved.

  The 2D drawing unit generates screen display data of a 2D object corresponding to the 3D object and outputs the generated screen display data to the display screen of the display body when the screen angle acquired by the angle acquisition unit is 180 degrees. Is preferred.

  According to the above configuration, when the display screen of the display body and the display screen of the substrate are opened on one plane, the 2D drawing means performs the above process instead of the 3D object drawing processing by the 3D drawing means. A 2D object drawing process corresponding to the 3D object is employed.

  When the display screen of the display body is at the same angle as the display screen of the base, it is easier for the user to display the object in the same manner as the display screen of the base. Therefore, when the display screen of the display body is at the same angle as the display screen of the base body, the visibility of the user is improved by displaying the object in 2D similarly to the display screen of the base body.

  Furthermore, since the processing for drawing a 3D object is a high-load process by the display processing device, adopting a relatively low-load 2D object drawing process instead of the high-load processing reduces the load on the entire display processing device. , Leading to improved processing efficiency.

  The predetermined angle calculation rule may include a calculation formula for obtaining the projection angle from the screen angle.

  Alternatively, the predetermined angle calculation rule may include a correspondence table indicating a correspondence relationship between the screen angle and the projection angle.

  In order to solve the above problems, a display processing apparatus control method according to the present invention includes a display body provided with a display screen and a base body rotatably connected to the display body. And a 3D object is included based on an angle acquisition step of acquiring from the angle detection unit a screen angle formed by the display screen with respect to the base, and the screen angle acquired in the angle acquisition step. A projection angle calculation step of calculating a projection angle, which is an angle of a viewpoint for capturing the 3D object, in accordance with a predetermined angle calculation rule, and the projection angle calculated by the projection angle calculation step. And a 3D rendering step for generating screen display data for projecting an object and displaying it on the display screen.

  According to the above method, the 3D object displayed on the display screen is projected by determining the angle of the viewpoint according to the relative angle between the display body provided with the display screen and the base, Because the image is drawn, the display content does not change if the entire display processing device is moved, and only when the display unit moves between the base and the display body, the projection angle changes according to the angle, and the display content is changed. The

  Therefore, even when the display processing device is moved against the user's intention, the user's visibility can be prevented from being impaired, and the display content of the 3D object can be changed according to the relative angle between the base and the display screen. The effect is that the user can intuitively grasp the 3D object.

  The display processing device may be realized by a computer. In this case, the display processing device control program for causing the display processing device to be realized by the computer by causing the computer to operate as the respective means, and A computer-readable recording medium on which is recorded also falls within the scope of the present invention.

  In order to solve the above problems, a display processing apparatus according to the present invention is a display processing apparatus including a display body provided with a display screen and a base body rotatably connected to the display body. An angle acquisition unit that acquires the screen angle formed by the display screen with respect to the base body from an angle detection unit, and the 3D object in a space including the 3D object based on the screen angle acquired by the angle acquisition unit. A projection angle calculation unit that calculates a projection angle that is an angle of a viewpoint to be captured according to a predetermined angle calculation rule, and the 3D object is projected based on the projection angle calculated by the projection angle calculation unit, and the display screen And 3D rendering means for generating screen display data for display on the screen.

  In order to solve the above problems, a display processing apparatus control method according to the present invention includes a display body provided with a display screen and a base body rotatably connected to the display body. And a 3D object is included based on an angle acquisition step of acquiring from the angle detection unit a screen angle formed by the display screen with respect to the base, and the screen angle acquired in the angle acquisition step. A projection angle calculation step of calculating a projection angle, which is an angle of a viewpoint for capturing the 3D object, in accordance with a predetermined angle calculation rule, and the projection angle calculated by the projection angle calculation step. And a 3D rendering step for generating screen display data for projecting an object and displaying it on the display screen.

  Therefore, there is an effect that the user can intuitively understand the display contents without impairing the visibility of the user.

  An embodiment of the present invention is described below with reference to the drawings. In the present embodiment, as an example, a case will be described in which the display processing device of the present invention is realized as a map display device having a map display function (such as a car navigation system installed in a car). However, the display processing apparatus of the present invention is not limited to the above example, and any electronic device having a function of displaying information (mobile phone, portable game machine, electronic dictionary, PDA (personal digital assistant), notebook computer, etc. Etc.). Further, the display content is not limited to map data. The display processing apparatus of the present invention can be applied to an electronic device that can display any 3D object.

Embodiment 1
[Appearance of map display device]
2A to 2C are views showing the appearance of the map display device (the map display device 100 or the map display device 200) in the embodiment of the present invention. Below, the map display apparatus 100 is demonstrated.

  In the present embodiment, the map display device 100 includes a main body 101 and a lid 102 as shown in FIGS. In the present embodiment, in the map display device 100, the main body 101 and the lid body 102 are connected in a hinge shape by the hinge portion 5, and can be folded. As shown in FIG. 2 (c), the lid 102 can be rotated 180 degrees around the hinge portion 5 that connects the main body 101 and the lid 102.

  The main body 101 and the lid body 102 shown in FIGS. 2 (a) and 2 (b) show the inner part when the map display device 100 is closed, and FIG. 2 (a) shows the lid body 102 inside. FIG. 2B when folded is an external view of the map display device 100 when the main body 101 and the lid 102 are fully opened.

  In the present embodiment, the lid 102 is provided with a display unit 4 on the inside for displaying a map and a menu screen for operating the map display device 100. Although not shown here, the main body 101 may include an operation unit 3 for inputting an instruction signal for operating the map display device 100 inside. Specifically, the operation unit 3 may be realized by a keyboard unit including a button group provided directly on the main body 101 for inputting an instruction, a touch panel unit provided integrally with the display unit, or the like. Alternatively, the main unit 101 includes a light receiving unit that receives an infrared signal as the operation unit 3, receives an input signal from a remote controller (not shown) provided separately from the main unit 101, and sends an instruction signal from the user to the map display device 100. It may be configured to transmit to. The main body 101 may further be provided with a display unit (lower screen display unit 42). A configuration including two display units on the upper and lower sides will be described in detail in << Embodiment 2 >>.

  Furthermore, an angle detection unit 2 is provided inside the hinge unit 5. The angle detection unit 2 is realized by an angle sensor that detects a relative angle (relative angle / screen angle) with the main body 101 serving as a reference in the lid 102 provided with the display unit 4. For example, in a state where the lid body 102 is in the position of FIG. 2C, the angle detection unit 2 detects the relative angle (screen angle) as 180 degrees, and the lid body 102 is in the position of “O”. Then, the relative angle (screen angle) is detected as 90 degrees.

  In addition, the structure of the hinge part 5 and the angle detection part 2 is not limited above, According to the use of the map display apparatus 100, the assumed installation place, etc., the angle which can be rotated, and the angle which can be detected are each set suitably. Is done.

  Moreover, the structure of the map display apparatus 100 is not limited to the structure shown to Fig.2 (a)-(c), The map display apparatus 100 is the display body in which the display part 4 is provided, and the screen of the display part 4. Any structure may be used as long as it has at least two-part configuration with a base including a straight line or a plane serving as a reference for determining a relative angle and is connected to each other so as to be rotatable. .

  For example, as shown in the figure, the display unit 4 does not rotate in the vertical direction when viewed from the user, but the housing may be configured to be rotatable in the left-right direction, like a book or a three-way mirror.

[Configuration of map display device]
FIG. 1 is a block diagram showing a main configuration of a map display device 100 according to an embodiment of the present invention.

  As shown in FIG. 1, the map display device 100 includes a position information acquisition unit 1, an angle detection unit 2, an operation unit 3, a display unit 4, a control unit 110, a storage unit 120, and a temporary storage unit 130. .

  The position information acquisition unit 1 detects the current position in the map display device 100. Specifically, the position information acquisition unit 1 includes a GPS (Global Positioning System) antenna and a GPS control unit. The signal received via the GPS antenna is processed by the GPS control unit so that the map display device 100 can grasp the latitude and longitude, and is transmitted to the control unit 110.

  As described above, the angle detection unit 2 detects a relative angle between the lid 102 provided with the display unit 4 and the main body 101 serving as a reference. The operation unit 3 is an input device for the user to operate the map display device 100 as described above.

  As described above, the display unit 4 displays a map stored in the storage unit 120, or displays a GUI screen such as a menu screen. The display unit 4 is realized by a liquid crystal display (LCD), for example.

  The storage unit 120 stores a control program executed by the control unit 110, an OS program, and various data read when the control unit 110 executes various functions of the map display device 100. Read only memory) or a non-volatile storage device such as a hard disk. Specifically, the various data stored in the storage unit 120 are stored in, for example, the angle calculation rule storage unit 20 and the 3D map data storage unit 21 shown in FIG.

  The angle calculation rule storage unit 20 calculates a projection angle (a virtual viewpoint angle for capturing a stereoscopic image in the virtual space of 3D map data) from the relative angle between the main body 101 and the lid 102 detected by the angle detection unit 2. Rules for memorizing. This angle calculation rule is referred to by the projection angle calculation unit 11. A specific example of the angle calculation rule will be described later in detail with reference to FIGS. 3 (a) and 3 (b).

  The 3D map data storage unit 21 stores 3D map data for displaying the three-dimensional map shown in FIG. The 3D map data includes height information of buildings and the like, vector information of stereoscopic images, and the like in addition to planar map data. Since the 3D map data includes information associating the coordinates on the map data with the actual latitude / longitude information, the map display device 100 is based on the latitude / longitude information acquired from the position information acquisition unit 1. It is possible to recognize which area of the map data should be displayed.

  The temporary storage unit 130 is configured by a volatile storage device such as a RAM, and is used as a work area for temporarily storing data in the process in which the control unit 110 executes various functions of the map display device 100. For example, the temporary storage unit 130 includes a screen display data storage unit 30 as a frame buffer that stores screen display data for one screen displayed on the display unit 4.

  The control unit 110 performs overall control of various operations of each unit included in the map display device 100, and includes a map display control unit 10, a projection angle calculation unit 11, and a 3D drawing unit 12 as functional blocks. Each unit shown as the functional block can be realized by a CPU (central processing unit) reading a program stored in a storage device such as a ROM (read only memory) into a RAM (random access memory) and executing the program.

  The map display control unit 10 controls the 3D drawing unit 12 to display a map on the display unit 4. More specifically, information on the current position (latitude and longitude) in the map display device 100 is acquired, and among the 3D map data stored in the 3D map data storage unit 21, an area to be displayed on the display unit 4 is specified. And transmitted to the 3D rendering unit 12.

  The projection angle calculation unit 11 calculates a projection angle based on the relative angle detected by the angle detection unit 2 (the inner angle between the lid 102 and the main body 101). The projection angle is an angle of a virtual viewpoint for capturing a stereoscopic image such as a building in a virtual space on 3D map data. More specifically, the projection angle is determined by the 3D map data and a straight line connecting predetermined coordinates (obtained from the current position) to be displayed on the 3D map data and the coordinates of the virtual viewpoint position that captures the display object. It is an angle made between the virtual ground. As shown in FIG. 4B, the appearance of a stereoscopic image (such as a building) on the 3D map data 40 located in the virtual space changes when the angle of the virtual viewpoint changes. For example, the position directly above the building is captured from the virtual viewpoint position at the projection angle a, and the front of the building is captured from the virtual viewpoint position at the projection angle o. Thus, in order for the 3D drawing unit 12 to draw a three-dimensional map from 3D map data, the projection angle needs to be specified.

  The projection angle calculation unit 11 calculates a projection angle based on the relative angle according to the angle calculation rule stored in the angle calculation rule storage unit 20, and transmits the calculated projection angle to the 3D drawing unit 12. The procedure by which the projection angle calculation unit 11 calculates the projection angle will be described later.

  The 3D drawing unit 12 reads 3D map data stored in the 3D map data storage unit 21 and draws a three-dimensional map to be displayed on the display unit 4. Specifically, among the 3D map data in the 3D map data storage unit 21, the plan display data of the area specified by the map display control unit 10, the height information of the building, the vector information of the stereoscopic image, etc. are read and projected. Based on the projection angle calculated by the angle calculation unit 11, a stereoscopic image is virtually projected in a virtual space on the 3D map data, and a stereoscopic map is generated as screen display data for display on the display unit 4. The 3D drawing unit 12 writes a three-dimensional map to be displayed on the display unit 4 in the screen display data storage unit 30 under the control of the map display control unit 10.

  According to the above configuration, if the angle between the main body 101 and the lid 102 is fixed, the display content can be prevented from changing rapidly even if the main body 101 moves. The display content can be changed according to the relative angle with the lid 102 so that the user can intuitively grasp the display content.

[Projection angle calculation procedure]
Next, the projection angle calculation procedure in the projection angle calculation unit 11 will be described with reference to FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b).

  FIGS. 3A and 3B are diagrams illustrating an example of an angle calculation rule stored in the angle calculation rule storage unit 20. The angle calculation rule is a rule for the projection angle calculation unit 11 to calculate the projection angle from the relative angle detected by the angle detection unit 2.

  The angle calculation rule may be stored as a calculation formula for obtaining the projection angle from the relative angle, as shown in FIG.

  According to the angle calculation rule shown in FIG. 3A, first, when the projection angle calculation unit 11 acquires the relative angle between the main body 101 and the lid 102 from the angle detection unit 2, the acquired relative angle is obtained. The lid body angle is calculated based on the angle.

  The lid angle refers to the outside when the horizontal surface of the main body 101 and the lid 102 when the main body 101 and the lid 102 are completely open (the state shown in FIG. 2B) is used as a reference plane. Is an angle formed by the lid 102 and the reference plane. If it demonstrates using a specific example, in the example shown to Fig.4 (a), when the cover body 102 exists in the position of angle i, the cover body angle | corner which comprises between the reference planes 44 will be shown to FIG. 4 (a). Θ shown in FIG.

  Therefore, as shown in FIG. 3A, the projection angle calculation unit 11 calculates the lid angle by the formula “180 degrees—relative angle”.

  Next, the projection angle calculation part 11 calculates | requires a projection angle by the formula "90 degree | times-lid body angle". That is, in the present embodiment, the projection angle is the display unit 4 on the lid 102 fixed at a certain lid angle when the 3D map data 40 is virtually arranged on the reference plane 44. It is obtained by the perpendicular 43 to be lowered with respect to the surface of

  Alternatively, the angle calculation rule may be stored as a table indicating the correspondence between the relative angle (or the lid angle obtained from the relative angle) and the projection angle corresponding to the angle as shown in FIG. .

  The projection angle calculation unit 11 can obtain the projection angle from the relative angle detected by the angle detection unit 2 by referring to the table shown in FIG.

  FIG. 4A is a side view of the map display device 100, and is a diagram illustrating the relationship between the lid body angle of the lid body 102 and the projection angle in the virtual space of the 3D map data 40. FIG. 4B is a diagram for explaining a specific example of the projection angle (the angle of the virtual viewpoint) in the virtual space of the 3D map data 40 obtained corresponding to the lid body angle of the lid body 102 shown in FIG. It is.

  When the lid 102 is in the position of the angle (ie, the lid angle = 0 °), the projection angle calculation unit 11 performs projection according to the angle calculation rule shown in FIG. 3 (a) or (b). The angle a ′ (projection angle = 90 degrees) is calculated. When the lid 102 is at the position of the angle a, the projection angle a 'is set. When the lid 102 is the angle c, the projection angle u' is set. In the case of the angle d, the projection angle d 'is set. Respectively, the projection angle o ′ is calculated.

  As described above, since the display content of the stereoscopic image changes due to the change in the relative angle between the main body 101 and the lid 102, the user can intuitively grasp the stereoscopic image.

[Processing flow of map display device]
FIG. 5 is a flowchart showing the flow of map display processing of the map display device 100 according to the embodiment of the present invention. The map display device 100 starts map display processing when the power is turned on, an instruction to display a map is received from the user via the operation unit 3, or the lid angle of the lid 102 is changed. .

  First, the map display control unit 10 acquires information on the current position (S101). Specifically, the position information acquisition unit 1 may acquire the current position and transmit the latitude / longitude information to the map display control unit 10, or the address information input by the user via the operation unit 3. Based on this, the map display control unit 10 may acquire the current position.

  Next, the map display control part 10 specifies the area | region which should be displayed on the display part 4 among 3D map data based on the acquired latitude longitude information (S102). The area to be displayed is obtained from the current position, the vertical and horizontal lengths of the displayable area of the display unit 4, and the specified map reduction ratio.

  Subsequently, the angle detection unit 2 detects the relative angle between the main body 101 and the lid 102, and the projection angle calculation unit 11 acquires it (S103). And the projection angle calculation part 11 calculates a projection angle according to an angle calculation rule based on the acquired relative angle (S104). The projection angle calculation unit 11 transmits the calculated projection angle to the 3D drawing unit 12.

  Finally, under the control of the map display control unit 10, the 3D drawing unit 12 reads the area to be drawn specified by the map display control unit 10 from the 3D map data in the 3D map data storage unit 21, and displays the 3D map. Drawing is performed (S105). At this time, a three-dimensional map is drawn as a bird's eye view from the projection angle calculated by the projection angle calculation unit 11. The 3D drawing unit 12 draws the three-dimensional map in the screen display data storage unit 30. The three-dimensional map of the screen display data storage unit 30 drawn by the 3D drawing unit 12 is displayed on the display unit 4.

  FIGS. 6A and 6B are diagrams illustrating a display example of a three-dimensional map displayed on the display unit 4 in accordance with the angle of the lid 102 in the map display device 100 according to the embodiment of the present invention.

  FIG. 6A is a diagram illustrating a display example of a three-dimensional map displayed on the display unit 4 when the lid 102 is at the position of the angle D in FIG. As shown in FIG. 6A, a stereoscopic image such as a building on the 3D map data is displayed as a bird's-eye view from the virtual viewpoint of the projection angle d ′ (FIG. 4B).

  FIG. 6B is a diagram showing a display example of the three-dimensional map displayed on the display unit 4 when the lid 102 is at the position of the angle a in FIG. As shown in FIG. 6B, the stereoscopic image of the building or the like on the 3D map data is a bird's-eye view from the virtual viewpoint of the projection angle a ′ (FIG. 4B), that is, a bird's-eye view capturing the building from right above Is displayed.

  According to the above configuration and method, the three-dimensional map displayed on the display unit 4 has a virtual viewpoint according to the relative angle between the lid 102 provided with the display unit 4 and the main body 101. The display content does not change if the main body 101 is moved, and the display content changes according to the angle only when the main body 101 and the lid 102 are moved. To do.

  Therefore, even when the map display device 100 is moved against the user's intention, it is possible to prevent the visibility of the user from being impaired, and the display content of the 3D object according to the relative angle between the main body 101 and the lid 102. This is advantageous in that the user can intuitively grasp the display contents.

<< Embodiment 2 >>
[Background Technology]
In a conventional map display device (car navigation system), main map display methods include a method of displaying 2D map data as a planar map and a method of displaying 3D map data as a three-dimensional map. The advantage of 2D display of a map is that it is easy to grasp the position where the user is and the surrounding positional relationship. On the other hand, the advantage of 3D display is that a three-dimensional map captured from an angle close to the actual viewpoint position is close to an actual video that enters the user's field of view, so that the direction of travel is easily grasped.

  Therefore, in order to enjoy both advantages, in the conventional map display device, the user arbitrarily switches and displays either the map displayed in 2D or the map displayed in 3D. Alternatively, both a planar map and a three-dimensional map are displayed side by side at the same time. However, in these conventional map display devices, the user who views the map recognizes the map recognition method in the case of a planar map and the map recognition method in the case of a three-dimensional map, and the user himself / herself replaces the reading. Although it has to be performed and enjoys both advantages, it has not always been a map display method that is easy to grasp intuitively by the user.

  Therefore, in the present embodiment, by using the two-screen configuration of the display processing apparatus of the present invention, the 2D object and the 3D object that take advantage of both the 2D display and the 3D display without impairing the visibility of the user are used. A display method and a display processing apparatus that executes the display method are proposed.

  In the first embodiment, a configuration in which a three-dimensional map in which the projection angle is changed according to the angle between the lid 102 and the main body 101 is displayed on one display unit 4 provided on the lid 102 of the map display device 100 will be described. did. The display processing apparatus of the present invention is not limited to the above-described embodiment, and is realized as a display processing apparatus having a two-screen display configuration in which a display unit is provided in each of the first casing and the second casing, for example. Is possible.

  This embodiment demonstrates the case where the display processing apparatus of this invention is implement | achieved as a map display apparatus which can display a map on 2 screens.

[Appearance of map display device 2]
The map display device 200 has almost the same appearance as the map display device 100 shown in FIGS. Description of the same configuration of the map display device 200 already described in the description of the appearance of the map display device 100 will be omitted. The map display device 200 in this embodiment differs from the map display device 100 in that the map display device 200 includes an upper screen display unit 41 instead of the display unit 4 in the lid 102. The main body 101 has a two-screen configuration in which the lower screen display unit 42 is provided.

  The map display device 200 displays a map on two screens, an upper screen display unit 41 and a lower screen display unit 42. In this embodiment, the two maps displayed on the two screens are connected. In the present embodiment, the map displayed on the lower screen display unit 42 is always configured to display 2D display, that is, only a planar map. This is because the surface of the lower screen display unit 42 provided in the main body 101 is also a reference surface. For this reason, the projection angle of the lower screen display unit 42 is fixed to the projection angle from directly above, so that there is no great difference in the amount of information from the 2D-displayed planar map. Thus, by making the map display processing of the lower screen display unit 42 only 2D display, it is possible to reduce the processing load of the map display device 200 as a whole. However, the map display function of the lower screen display unit 42 is not limited to the above.

  Furthermore, in this embodiment, the map display method of the upper screen display unit 41 is switched according to the lid body angle of the lid body 102 provided with the upper screen display unit 41. That is, when the lid angle is greater than 0 degrees, the 3D map is displayed in 3D as in the first embodiment, and the lid angle is 0 degrees (the main body 101 and the lid body 102 are fully opened). In this case, the display method is switched to the 2D display method of the planar map. When the lid body angle is 0 degree, as described in the previous stage, the lower screen display unit 42 is also parallel to the reference plane. Therefore, at this time, the projection angle of the upper screen display unit 41 is an angle at which the 3D map data is captured directly above the stereoscopic image, and there is no great difference in the amount of information from the planar map displayed in 2D. In this way, the processing load of the map display device 200 can be reduced by making the map display processing of the upper screen display unit 41 2D display only when the lid 102 is parallel to the reference plane.

  The configuration of the map display device 200 that realizes the map display method described above will be described in detail below.

[Configuration 2 of map display device]
FIG. 7 is a block diagram showing a main configuration of a map display device 200 according to another embodiment of the present invention. In the map display device 200, the same parts as those of the map display device 100 of the first embodiment are denoted by the same reference numerals, and the repeated description is appropriately omitted.

  The map display device 200 shown in FIG. 7 is different from the map display device 100 of FIG. 1 in that it has a two-screen configuration including an upper screen display unit 41 and a lower screen display unit 42. . The upper screen display unit 41 and the lower screen display unit 42 are realized by a liquid crystal display (LCD) or the like, similar to the display unit 4 of the first embodiment. The temporary storage unit 130 includes a frame buffer for each display unit instead of the screen display data storage unit 30. That is, an upper screen display data storage unit 31 that stores screen display data for one screen displayed on the upper screen display unit 41 and a lower screen that stores screen display data for one screen displayed on the lower screen display unit 42. And a screen display data storage unit 32.

  Second, the control unit 110 includes a 2D drawing unit 13 in addition to the 3D drawing unit 12 as a functional block. In addition to the 3D map data storage unit 21, the storage unit 120 includes a 2D map data storage unit 22 that stores 2D map data for displaying the planar map shown in FIG. The 2D drawing unit 13 reads 2D map data stored in the 2D map data storage unit 22 and displays it on the lower screen display unit 42 (or both the upper screen display unit 41 and the lower screen display unit 42). It draws a flat map. The 3D drawing unit 12 reads the 2D map data of the area specified by the map display control unit 10 according to the control of the map display control unit 10, and converts the planar map into the lower screen display data storage unit 32 (or the upper screen display data). Drawing is performed in both the storage unit 31 and the lower screen display data storage unit 32).

  Further, in the present embodiment, the map displayed on the upper screen display unit 41 is switched according to the relative angle of the lid 102 detected by the angle detection unit 2. Specifically, when the projection angle calculation unit 11 determines that the lid angle of the lid 102 is 0 degree based on the relative angle detected by the angle detection unit 2, the map display control unit 10 Accordingly, the 2D drawing unit 13 is instructed to draw a planar map so that the map to be displayed on the upper screen display unit 41 is displayed in 2D. On the other hand, when the projection angle calculation unit 11 determines that the lid angle of the lid 102 is greater than 0 degrees, the map display control unit 10 displays the map to be displayed on the upper screen display unit 41 in 3D according to the above determination. The 3D drawing unit 12 is instructed to draw a three-dimensional map. The method of drawing a 3D map by the 3D drawing unit 12 is the same as that in the first embodiment.

  Third, the map display control unit 10 of the control unit 110 stores the map area to be displayed on the upper screen display unit 41 and the map area to be displayed on the lower screen display unit 42 in the storage unit 120. By referring to the stored display area storage unit 23, the current position is specified. The display area storage unit 23 defines a procedure for the map display control unit 10 to specify a display area for each display unit. In the present embodiment, the map is connected to the upper screen display unit 41 and the lower screen display unit 42 so that the map is displayed. Therefore, the map display control unit 10 displays the maps individually so that the maps are connected. The area is specified and transmitted to each drawing unit.

  Furthermore, the map display device 200 may include a display unit direction detection unit 6 that detects the direction of each display unit. In recent years, the display unit in a display processing device, particularly a portable display processing device, can be displayed in a vertically long state or a horizontally long state, such as freely changing the display direction, or the position of the display unit itself It is possible to change by rotating (switch between portrait and landscape). Since the display area of the map varies depending on the vertical and horizontal lengths of the display section, the map display control section 10 accurately grasps the display direction and the installation direction of the display section when adopting a display section whose aspect ratio changes. Accordingly, it is necessary to specify the display area of the map according to the response.

  Therefore, the map display control unit 10 acquires the display direction or the installation direction of each display unit detected by the display unit direction detection unit 6, and displays each current display unit (the upper screen display unit 41 and the lower screen display unit 42). ) Accurately identify the vertical and horizontal lengths, and specify the map display area.

[Display area identification procedure]
The display area specifying procedure of each display unit in the map display control unit 10 will be described with reference to FIGS.

  FIG. 8 is a diagram illustrating an example of a display area specifying procedure stored in the display area storage unit 23. As illustrated in FIG. 8, the display area specifying procedure is defined for each display unit included in the map display device 200 and for each position (for example, portrait or landscape) included in each display unit. In the example shown in FIG. 8, it is assumed that the upper screen display unit 41 has two positions, ie, a portrait position and a landscape position. 1) ”, a display area specifying procedure“ upper screen (2) ”when the upper screen display section 41 is in the portrait position, and a display area specifying procedure“ lower screen ”of the lower screen display section 42 are stored.

  The map display control unit 10 grasps the current position based on the latitude / longitude information supplied from the position information acquisition unit 1. When the map display control unit 10 specifies the display area of the lower screen display unit 42, the map display control unit 10 is relative to the current position P indicated in the “display area” of the “lower screen” record in the display area storage unit 23. Based on the rectangular information defined by the positional relationship, the display area on the 2D map data is specified from the actual latitude and longitude information.

  For example, when the point P on the 2D map data shown in FIG. 9 is the current position, the map display control unit 10 displays the area indicated by the broken line frame 90 in FIG. 9 on the lower screen based on the rectangular information. The display area is specified as a display area to be displayed by the unit 42.

  When the map display control unit 10 specifies the display area of the upper screen display unit 41, if the upper screen display unit 41 is in the landscape position, the map display control unit 10 is indicated in the “display area” of the record of “upper screen (1)”. Based on the rectangular information, the display area on the 3D map data (in some cases, 2D map data) is specified from the actual latitude / longitude information.

  For example, when the point P on the 3D map data shown in FIG. 10 is the current position, the map display control unit 10 displays the area indicated by the dashed frame in FIG. 10 on the upper screen display unit based on the rectangular information. 41 is specified as a display area to be 3D displayed.

  As shown in FIG. 8, the rectangular information defined by the relative positional relationship with the point P is determined by each display unit in consideration of the physical positional relationship between the upper screen display unit 41 and the lower screen display unit 42. The coordinates are defined in advance so that when the maps are displayed, the maps appear to be connected to each other. Specifically, the map display control unit 10 considers the positional relationship in which the upper screen display unit 41 and the lower screen display unit 42 are arranged in the vertical direction, and in the 2D map data shown in FIG. The area of the frame 90 is specified, and in the corresponding 3D map data shown in FIG. 10, the area of the broken line frame (FIG. 10) adjacent to the area of the broken line frame 90 in the vertical direction is specified.

  Therefore, even when different map data are handled and different drawing units display maps on their respective display units using different drawing methods, the displayed maps can be displayed as connected to each other. It becomes.

  When the upper screen display unit 41 is switched to 2D display, the map display control unit 10 specifies the area indicated by the broken line frame 91 shown in FIG. 9 as the display area to be displayed on the upper screen display unit 41. To do. Each display unit displays a map of a broken line frame 90 and a map of a broken line frame 91 that are adjacent in the vertical direction, and the maps are connected and displayed continuously.

[Processing flow 2 of map display device]
FIG. 11 is a flowchart showing the flow of map display processing of the map display device 200 according to the embodiment of the present invention. The map display device 200 starts map display processing when the power is turned on, an instruction to display a map is received from the user via the operation unit 3, or the lid angle of the lid 102 is changed. .

  First, the map display control unit 10 acquires information on the current position as in S101 of FIG. 5 (S201).

  Next, the angle detector 2 detects the relative angle between the main body 101 and the lid 102, and the projection angle calculator 11 acquires it (S202). The projection angle calculation unit 11 first calculates a lid angle based on the acquired relative angle.

  Here, when the projection angle calculation unit 11 determines that the calculated lid angle is greater than 0 degrees (A in S203), the map display control unit 10 displays a three-dimensional map on the upper screen display unit 41. Thus, the 3D drawing unit 12 is controlled. Specifically, the map display control unit 10 refers to the display region storage unit 23 and specifies a display region on the 3D map data for stereoscopic display on the upper screen display unit 41 (S204).

  Subsequently, as in S104 of FIG. 5, the projection angle calculation unit 11 calculates a projection angle based on the relative angle (S205).

  Then, the 3D drawing unit 12 draws the display area on the 3D map data specified in S204 at the projection angle calculated in S205 (S206). The three-dimensional map drawn by the 3D drawing unit 12 is displayed on the upper screen display unit 41 via the upper screen display data storage unit 31 (S207).

  On the other hand, in S203, when the projection angle calculation unit 11 determines that the calculated lid body angle is 0 degree (B in S203), the map display control unit 10 displays a planar map on the upper screen display unit 41. The 2D drawing unit 13 is controlled to display. Specifically, the map display control unit 10 refers to the display region storage unit 23 and specifies a display region on the 2D map data for planar display on the upper screen display unit 41 (S208).

  Subsequently, the 2D drawing unit 13 draws the display area on the 2D map data specified in S208 (S209). The planar map drawn by the 2D drawing unit 13 is displayed on the upper screen display unit 41 via the upper screen display data storage unit 31 (S207).

  Next, the map display control unit 10 controls the 2D drawing unit 13 to display a planar map on the lower screen display unit 42. Specifically, the map display control unit 10 refers to the display region storage unit 23 and specifies a display region on the 2D map data for planar display on the lower screen display unit 42 (S210).

  Subsequently, the 2D drawing unit 13 draws the display area on the 2D map data specified in S210 (S211). The planar map drawn by the 2D drawing unit 13 is displayed on the lower screen display unit 42 via the lower screen display data storage unit 32 (S212).

  12A and 12B are three-dimensional maps displayed on the upper screen display unit 41 and the lower screen display unit 42 according to the angle of the lid 102 in the map display device 200 according to the embodiment of the present invention. It is a figure which shows the example of a display of a plane map.

  FIG. 12A shows a three-dimensional map displayed on the upper screen display unit 41 and a plane displayed on the lower screen display unit 42 when the lid 102 is at the position of the angle D in FIG. It is a figure which shows the example of a display of a map. As shown in FIG. 12A, in the upper screen display unit 41, a stereoscopic image such as a building on the 3D map data is displayed as a bird's eye view from the virtual viewpoint of the projection angle d ′ (FIG. 4B). On the other hand, the lower screen display unit 42 displays a planar map on the 2D map data. The three-dimensional map displayed on the upper screen display unit 41 and the planar map displayed on the lower screen display unit 42 are connected.

  FIG. 12B is a diagram illustrating a display example of a planar map displayed on the display unit 4 when the lid 102 is at the position of the angle A in FIG. As shown in FIG. 12B, in the upper screen display unit 41, a planar map on the 2D map data is switched and displayed instead of a bird's eye view of a stereoscopic image such as a building on the 3D map data from above. The On the lower screen display unit 42, a planar map similar to that shown in FIG. The planar map displayed on the upper screen display unit 41 and the planar map displayed on the lower screen display unit 42 are connected.

  According to the above configuration and method, the three-dimensional map displayed on the upper screen display unit 41 corresponds to the relative angle that the lid 102 provided with the upper screen display unit 41 forms with the main body 101. Since the drawing is performed by determining the virtual viewpoint angle, the display content does not change if the main body 101 is moved, and only when the main body 101 and the lid 102 move, according to the angle. Display content changes.

  Furthermore, since the lower screen display unit 42 displays a planar map on the 2D map data so as to be connected to the three-dimensional map of the upper screen display unit 41 instead of the bird's-eye view of the map viewed from directly above, the 2D display and The user can intuitively grasp the display contents while taking advantage of both advantages of 3D display.

  Further, when the lid 102 provided with the upper screen display unit 41 is parallel to the main body 101 as the reference surface (when the map display device 200 is fully opened), the upper screen display is performed. Similarly to the lower screen display unit 42, the unit 41 displays a bird's-eye view of the map viewed from directly above. In this case, a plane map drawn by the 2D drawing unit 13 is used instead of the three-dimensional map. Switch to display.

  As a result, it is possible to reduce the processing load of the map display device 200 as a whole and improve the processing efficiency by substituting a relatively low-load 2D display without using a high-load 3D display as much as possible. .

<< Embodiment 3 >>
In each of the above-described embodiments, the display content is changed according to only the relative angle between the reference surface and the lid 102 without considering the orientation of the reference surface in the real space in the main body 101 of the map display device. Has been described. That is, in each of the above-described embodiments, it is assumed that the reference plane of the main body 101 is maintained upward in the vertical direction.

  However, a use case in which the display unit 4 of the lid 102 is visually recognized in a state in which the reference surface of the main body 101 faces a direction other than the upward in the vertical direction (for example, downward in the vertical direction) is also assumed. In such a case, the display content can be changed in consideration of the direction in which the main body 101 having the reference plane faces.

  For example, the main body 101 is provided with sensors for detecting the tilt and orientation of the main body 101 such as a six-axis sensor, a three-axis acceleration sensor, and a ground axis sensor, and the map display control unit 10 receives the main body 101 obtained from the sensor. Depending on the posture, a configuration in which the content to be drawn by the 3D drawing unit 12 or the 2D drawing unit 13 is selected can be considered.

  More specifically, when the main body 101 is maintained upward in the vertical direction, as described in the first and second embodiments above, the ground map is displayed in 2D and / or 3D, and the main body 101 is displayed. When 101 is maintained vertically downward, it is possible to display a map of the underground shopping street in 2D and / or 3D. In this case, the storage unit 120 stores 3D / 2D map data of the underground shopping area separately from the 3D map data storage unit 21 and the 2D map data storage unit 22.

  In this way, not only the display content of the same 3D map data can be changed, but also the map data to be drawn can be changed to a completely different one according to the orientation of the main body 101. For example, the map data of each city in the world is stored in the storage unit 120 in addition to the map of the underground mall, and a map of a city in a predetermined place on the earth is displayed according to the orientation of the reference plane in the real space. It is also possible.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  Finally, each block of the map display devices 100 and 200, in particular, the map display control unit 10, the projection angle calculation unit 11, the 3D drawing unit 12, and the 2D drawing unit 13 may be configured by hardware logic. Alternatively, it may be realized by software using a CPU as follows.

  That is, the map display devices 100 and 200 include a CPU (central processing unit) that executes instructions of a control program for realizing each function, a ROM (read only memory) that stores the program, and a RAM (random access) that expands the program. memory), a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a record in which the program code (execution format program, intermediate code program, source program) of the control program of the map display device 100/200, which is software that realizes the functions described above, is recorded so as to be readable by a computer. This can also be achieved by supplying a medium to the map display devices 100 and 200 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and disks including optical disks such as CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  The map display devices 100 and 200 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The display processing apparatus of the present invention can be applied to all electronic devices (cell phones, portable game machines, electronic dictionaries, PDAs (personal digital assistants), notebook computers, etc.) having a function of displaying 3D objects. is there.

It is a block diagram which shows the principal part structure of the map display apparatus in embodiment of this invention. (A)-(c) is a figure which shows the external appearance of the map display apparatus in embodiment of this invention. (A) And (b) is a figure which shows an example of the angle calculation rule memorize | stored in the angle calculation rule memory | storage part of a map display apparatus. (A) is a side view of a map display apparatus, and is a figure explaining the relationship between the cover body angle of a cover body, and the projection angle in the virtual space of 3D map data, (b) is (a). It is a figure which shows the specific example of the projection angle in the virtual space of 3D map data calculated | required corresponding to the cover body angle of the cover body to show. It is a flowchart which shows the flow of the map display process of the map display apparatus in embodiment of this invention. (A) And (b) is a figure which shows the example of a display of the three-dimensional map displayed on a display part according to the angle of a cover body in the map display apparatus in embodiment of this invention. It is a block diagram which shows the principal part structure of the map display apparatus in other embodiment of this invention. It is a figure which shows an example of the display area specific procedure memorize | stored in the display area memory | storage part of a map display apparatus. It is a figure which shows a part of 2D map data memorize | stored in the 2D map data storage part of a map display apparatus concretely. It is a figure which shows a part of 3D map data memorize | stored in the 3D map data storage part of a map display apparatus concretely. It is a flowchart which shows the flow of the map display process of the map display apparatus in other embodiment of this invention. (A) And (b) is the map display apparatus in other embodiment of this invention, The table | surface of the solid map and plane map displayed on an upper screen display part and a lower screen display part according to the angle of a cover body It is a figure which shows an example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Position information acquisition part 2 Angle detection part 3 Operation part 4 Display part (display screen)
5 Hinge part 6 Display part direction detection part 10 Map display control part (object display control means)
11 Projection angle calculation unit (angle acquisition means / projection angle calculation means)
12 3D drawing unit (3D drawing means)
13 2D drawing unit (2D drawing means)
20 Angle calculation rule storage unit 21 3D map data storage unit 22 2D map data storage unit 23 Display area storage unit 30 Screen display data storage unit 31 Upper screen display data storage unit 32 Lower screen display data storage unit 40 3D map data 41 Upper screen Display unit (display body display screen)
42 Lower screen display (base display screen)
100 Map display device (display processing device)
101 Main body (base)
102 Lid (display body)
110 control unit 120 storage unit 130 temporary storage unit 200 map display device (display processing device)

Claims (10)

In a display processing apparatus comprising a display body provided with a display screen and a base body rotatably connected to the display body,
Angle acquisition means for acquiring a screen angle formed by the display screen with respect to the base from an angle detection unit;
Projection angle calculation means for calculating a projection angle, which is an angle of a viewpoint for capturing the 3D object, in a space including the 3D object based on the screen angle acquired by the angle acquisition means according to a predetermined angle calculation rule; ,
3D rendering means for projecting the 3D object based on the projection angle calculated by the projection angle calculating means and generating screen display data for displaying on the display screen. Processing equipment. The base is further provided with a display screen,
The display processing device further includes:
2D drawing means for generating screen display data of a 2D object corresponding to the 3D object,
The display processing apparatus according to claim 1, wherein the 2D drawing unit outputs the generated screen display data of the 2D object to the display screen of the base. An object display control means for instructing each of the drawing means to draw a 2D object or a 3D object;
The object display control means is
Of the space including the 3D object, the region of the 3D object to be displayed on the display screen of the display body and the plane of the 2D object to be displayed on the display screen of the base among the plane including the 2D object. When identifying areas,
In consideration of the positional relationship between the display screen of the base and the display screen of the display body, the adjacent areas are specified,
The drawing of the specified area of the 3D object is instructed to the 3D drawing means, and the drawing of the specified area of the 2D object is instructed to the 2D drawing means, respectively. Display processing device. The 3D object is 3D map data for displaying a map in three dimensions, and the 2D object is 2D map data for displaying a map in a plane,
The object display control means is
The area of 3D map data to be drawn by the 3D drawing means and the area of 2D map data to be drawn by the 2D drawing means are identified so that each area is specified. Display processing device. When the screen angle acquired by the angle acquisition unit is 180 degrees, the 2D drawing unit is
5. The display processing apparatus according to claim 2, wherein screen display data of a 2D object corresponding to the 3D object is generated and output to the display screen of the display body. 6.   The display processing apparatus according to claim 1, wherein the predetermined angle calculation rule includes a calculation formula for obtaining the projection angle from the screen angle.   The display processing apparatus according to claim 1, wherein the predetermined angle calculation rule includes a correspondence table indicating a correspondence relationship between the screen angle and the projection angle. A control method of a display processing device comprising a display body provided with a display screen and a base body rotatably connected to the display body,
An angle acquisition step of acquiring, from an angle detection unit, a screen angle formed by the display screen with respect to the base;
Projection angle calculation step for calculating a projection angle that is an angle of a viewpoint for capturing the 3D object in a space including the 3D object based on the screen angle acquired in the angle acquisition step according to a predetermined angle calculation rule. When,
A display processing apparatus comprising: a 3D rendering step of projecting the 3D object based on the projection angle calculated in the projection angle calculating step and generating screen display data for display on the display screen. Control method.   The control program for functioning a computer as each means of the display processing apparatus of any one of Claim 1-7.   A computer-readable recording medium on which the control program according to claim 9 is recorded.

Images