JP2013068637A - Mobile map display device and display control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile map display device and a display control method for the mobile map display device in which map display is performed which matches with the recognition of a user, according to the display direction of a screen in a mobile terminal.SOLUTION: A mobile map display device which displays a map on a display section includes: a setting section which sets a first screen display in which a predetermined direction in the display section runs vertically, and a second screen display in which the predetermined direction runs horizontally; an azimuth acquiring section which acquires an azimuthal angle to which the reference direction of an own device is oriented; and a control section which displays the map so that the direction coinciding with the azimuthal angle has the upper direction in a display on the display section, based on the setting in the setting section.

Description

  The present invention relates to a portable map display device and a display control method thereof.

  FIG. 4 is an explanatory diagram of a conventional car navigation device.

  Car navigation devices are often accompanied by an orientation measuring function as disclosed in, for example, Japanese Patent Laid-Open No. 9-292830. Since car navigation devices are assumed to be used for in-car installation, the orientation measurement direction of the device is always constant. As a result, the direction of the user (user) 's line of sight, the direction of the device, and the traveling direction of the vehicle Keep in mind that they will always match.

  On the other hand, in the next-generation mobile phone IMT2000, since high-speed digital information transmission is possible, there is a demand for displaying map information used in a car navigation device even on a mobile terminal.

  Thus, for example, as disclosed in US Pat. No. 5,923,294, map information is displayed on a portable terminal. And, when staying in a new city on a business trip or the like, it is convenient if the route from the current position to the destination can be displayed as route information on a map displayed on the mobile terminal.

Japanese Patent Laid-Open No. 9-292830 US Pat. No. 5,923,294

  FIGS. 5A and 5B are explanatory diagrams when a azimuth measuring function similar to that of a car navigation device is added to a mobile terminal, where FIG. 5A shows a horizontal screen and FIG. 5B shows a vertical screen.

  Since the user's line-of-sight direction depends on the screen display direction of the mobile terminal, there is a problem that when the screen display direction changes, the line-of-sight direction and the direction measurement direction do not match. For example, when the screen is changed from the horizontal screen to the vertical screen display, the user's line-of-sight direction and the direction measurement direction are the same on the horizontal screen, but the user's line-of-sight direction and the direction measurement direction are shifted by 90 degrees on the vertical screen display. It will be a thing. Many users recognize the direction (azimuth) facing the direction they are looking at (the line-of-sight direction), and thus the discrepancy between the line-of-sight direction and the direction of the direction of measurement has an adverse effect on usability.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a portable map display device that displays a map that matches a user's recognition according to a screen display direction on a portable terminal, and a display control method thereof. .

The present invention employs the following means.
A portable map display device according to the present invention is a portable map display device that causes a display unit to display a map, wherein a first screen display in which a predetermined direction of the display unit is vertical, and the predetermined direction is horizontal. A setting unit that sets the second screen display, an azimuth obtaining unit that obtains an azimuth angle toward the reference direction of the device itself, and a direction that matches the azimuth angle based on the setting in the setting unit is the display unit And a control unit that displays the map so as to be in an upward direction on the display.

  The display unit has a rectangular shape, and the setting unit displays a vertical screen display in which the longitudinal direction of the display unit is vertical, the first screen display, and a horizontal screen display in which the longitudinal direction is horizontal. It is set as a screen display.

  In addition, a position information detection unit that detects position information is provided, and the control unit displays a map based on current position information on the display unit.

  The map may be downloaded from an external server by communication based on the current position information.

  The azimuth obtaining unit may obtain the azimuth angle using a normal line of the screen of the display unit as a reference direction.

  Further, the display unit is characterized in that the map is a three-dimensional display.

  The azimuth information may be determined from information specified by a user as a target position or information specified by a user as a movement start position.

  The azimuth information may be determined based on a movement direction of the user or information specified by the user as a movement route.

  A display control method according to the present invention is a display control method for a portable map display device having a display unit and displaying a map on the display unit, wherein the first screen display has a predetermined direction of the display unit vertically. And a setting step for setting any one of the second screen display in which the predetermined direction is set sideways, an azimuth acquisition step for acquiring an azimuth angle facing the reference direction of the device, and a setting in the setting step, And a control step of displaying the map so that a direction coinciding with the azimuth angle is an upward direction on the display of the display unit.

  According to the present invention, even if the screen display direction changes, the true direction calculation unit and the direction information display unit work so that the user's line-of-sight direction and the direction measurement method always coincide with each other. Can be done.

It is a block diagram explaining an embodiment of the present invention. It is explanatory drawing of the navigation apparatus in this Embodiment. It is explanatory drawing of the map information displayed on a screen. It is explanatory drawing of the conventional car navigation apparatus. It is explanatory drawing at the time of adding the azimuth | direction measurement function similar to a car navigation apparatus to a portable terminal.

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

  FIG. 1 is a block diagram illustrating an embodiment of the present invention.

  In the figure, the portable navigation device 1 includes a position information detection unit 10, an orientation information detection unit 20, a screen display unit 30, a map information holding unit 40, and a screen display direction unit 50.

  Here, the position information refers to latitude and longitude information of the navigation device. The display of the position information includes a display using a character string indicating latitude and longitude, and a display using symbols on a map screen.

  The direction information refers to the direction information of the navigation device.

  The direction of measurement of the azimuth direction may be the traveling direction of the navigation device, the user's gaze direction, the screen display direction of the navigation device, etc., but in the present invention, the user's gaze direction is the same as the screen display direction of the navigation device. Is used as a reference for azimuth measurement.

  Map information refers to a map database that is a basis for displaying a map.

  The navigation device displays map information in consideration of the current position, current direction, map scale, display method (planar display 2D, 3D display 3D, etc.), screen display direction, screen physical area, etc. Is done.

  The screen display direction refers to the screen display direction of the navigation device. In general, when a map is displayed, a symbol on the map and a description character string of map information have a direction that is most easily viewable.

  The display of orientation information includes a display using a character string indicating east, west, north, and south, and an arrow symbol on a map screen.

  The position information detection unit 10 includes a GPS antenna 12 and a position information calculation unit 14.

  The GPS antenna 12 receives radio waves including positioning information from GPS satellites.

  The position information calculation unit 14 calculates the latitude, longitude, and altitude where the portable navigation device 1 is located from radio waves from GPS satellites.

  The azimuth information detection unit 20 includes an azimuth sensor 22, a temporary azimuth measurement unit 24, and a true azimuth calculation unit 26.

  The direction sensor 22 is a sensor that detects the north pole direction using magnetic needle information or a gyro.

  The temporary azimuth measuring unit 24 measures the azimuth angle of the map information displayed on the screen display unit 30 with respect to the reference azimuth. For example, the azimuth angle formed by the upper side of the map displayed on the screen display unit 30 with respect to the North Pole. taking measurement.

  The true orientation calculation unit 26 calculates a true orientation that matches the user's line of sight using the azimuth angle measured by the temporary orientation measurement unit 24 and the display direction held by the display direction holding unit 54.

  The screen display unit 30 includes a position information display unit 32, an orientation information display unit 34, and a map information display unit 36. The position information display unit 32 displays the current position and target position of the mobile navigation device 1 on a map displayed on the screen display unit 30.

  The direction information display unit 34 displays the true direction calculated by the true direction calculation unit 26 on the screen display unit 30 and corrects the display direction of the map information.

  The map information display unit 36 displays the map information read from the map information holding unit 40 in the display direction defined by the screen display direction unit 50 and displays the true direction calculated by the true direction calculation unit 26.

  The screen display unit 30 is preferably lightweight such as a liquid crystal or plasma display, and may have a display function as a mobile phone or an Internet terminal.

  The map information holding unit 40 is a memory that stores map information to be displayed on the map information display unit 36, and stores map information of a necessary area at a necessary scale. This map information may be carried inside the portable navigation device 10 like a CD-ROM, and if the portable navigation device 1 has a cellular phone function, a map connected via a base station. It may be downloaded from a server.

  The screen display direction unit 50 includes a display direction setting unit 52 and a display direction holding unit 54. The display direction setting unit 52 sets the display direction of the initial map in the map information display unit 36 by the user. When there is no user setting, for example, a horizontal display is made as a de facto. The display direction holding unit 54 holds the display direction of the map information displayed on the screen display unit 30, and recognizes, for example, whether the display is horizontal or vertical.

  Next, the operation of the apparatus configured as described above will be described.

  2A and 2B are explanatory diagrams of the navigation device according to the present embodiment, in which FIG. 2A shows a horizontal screen and FIG. 2B shows a vertical screen.

  If the display direction of the screen display unit 30 is horizontal screen display, the user's line of sight coincides with the azimuth angle measured by the temporary azimuth measurement unit 24, so that the true direction calculation unit 26 displays the map information on the screen display unit 30. The display direction is maintained as it is.

  On the other hand, if the display direction of the screen display unit 30 is a vertical screen display, the user's line of sight and the azimuth angle measured by the temporary azimuth measuring unit 24 do not match. The matching direction is calculated, and the map information display unit 36 corrects the display direction of the map information on the screen display unit 30.

  3A and 3B are explanatory diagrams of map information displayed on the screen, where FIG. 3A is the user's initial line-of-sight direction, FIG. 3B is the state where the user's line-of-sight direction has been changed, and FIG. The display direction of the map information is corrected according to.

  First, the true orientation calculation unit 26 sets the user's line-of-sight direction at the time of horizontal display as the “provisional orientation measurement direction”. The temporary orientation measurement direction may be any direction, but it is better not to make corrections as much as possible. Therefore, the most frequently used line-of-sight direction is preferably used as the “provisional orientation measurement direction”.

  Next, when the true orientation calculation unit 26 recognizes that the display direction of the screen display unit 30 has been changed, the true orientation calculation unit 26 measures the “provisional orientation measurement result” in the “provisional orientation measurement direction”. In the example of FIG. 2B, the temporary orientation measurement result is northeast.

  Next, the true orientation calculation unit 26 acquires the current screen display direction from the display direction holding unit 24. In the example of FIG. 2 (B), it is a vertical screen display.

  Finally, the true orientation calculation unit 26 corrects the “provisional orientation measurement result” from the current screen display direction, and notifies the orientation information display unit 34 of the “true orientation measurement result”. In the example of FIG. 2B, the true orientation measurement result is northwest.

  In the apparatus configured as described above, the display direction holding unit 54 holds the display direction of the map information displayed on the screen display unit 30. The provisional azimuth measuring unit 24 measures the azimuth angle in which the normal direction of the screen display unit 30 faces by measuring the azimuth angle with respect to the reference azimuth of the map information displayed on the screen display unit 30. The true orientation calculation unit 26 calculates a true orientation that matches the user's line of sight. The azimuth information display unit 34 corrects the display direction of the map information using the true azimuth calculated by the true azimuth calculation unit 26, and displays the map information that matches the sense of the user on the screen display unit 30.

  In the above embodiment, the case where the display direction of the screen display unit 30 is two directions of horizontal display and vertical display is shown, but the present invention is not limited to this, and the display direction of the screen display unit 30 is Corresponding to the case of displaying with an arbitrary inclination, the true direction calculation unit 26 may correct the display.

  Moreover, although the temporary orientation measuring unit 24 measures the upper side of the map displayed on the screen, since the normal made by the screen is highly likely to match the user's line of sight, the azimuth angle to which the normal made by the screen is directed is determined. It is good also as a structure reflected in the display direction of the map which measures and displays on the screen display part 30. FIG.

DESCRIPTION OF SYMBOLS 1 Portable navigation apparatus 10 Position information detection part 20 Direction information detection part 24 Temporary direction measurement part 26 True direction calculation part 30 Screen display part 34 Direction information display part 40 Map information holding part 50 Screen display direction part 54 Display direction holding part

The present invention employs the following means.
A portable map display device according to the present invention is a portable map display device that displays a map on a display unit, the azimuth acquisition unit that acquires a direction in which a normal line formed by a screen of the display unit faces, and the acquired A control unit that controls the reflected direction to be reflected in the display direction of the map displayed on the display unit.

  A display control method according to the present invention is a display control method for a portable map display device that has a display unit and displays a map on the display unit, and acquires a direction in which a normal line formed by a screen of the display unit faces. An azimuth obtaining step, and a control step for controlling the obtained azimuth to be reflected in a display direction of a map displayed on the display unit.

Claims (9)

A portable map display device for displaying a map on a display unit,
A setting unit for setting a first screen display in which the predetermined direction of the display unit is vertical and a second screen display in which the predetermined direction is horizontal;
An azimuth acquisition unit that acquires an azimuth angle of the reference direction of the device itself;
Based on the setting in the setting unit, a control unit that displays the map so that a direction that matches the azimuth is an upward direction on the display of the display unit;
A portable map display device comprising: The display unit has a rectangular shape,
The setting unit sets a vertical screen display in which the longitudinal direction of the display unit is vertical as the first screen display and a horizontal screen display in which the longitudinal direction is horizontal as the second screen display. Item 2. The portable map display device according to Item 1. A position information detector for detecting position information;
The portable map display device according to claim 1, wherein the control unit displays a map based on current position information on the display unit. The portable map display device according to claim 3, wherein the map is downloaded from an external server by communication based on the current position information. 5. The portable map display device according to claim 1, wherein the azimuth obtaining unit obtains the azimuth angle using a normal line of the screen of the display unit as a reference direction. The portable display device according to claim 1, wherein the display unit is a three-dimensional display of the map. The portable map according to any one of claims 1 to 6, wherein the azimuth information is determined from information specified by a user as a target position or information specified by a user as a movement start position. Display device. The portable map display device according to any one of claims 1 to 7, wherein the azimuth information is determined from a movement direction of a user or information designated by the user as a movement route. A display control method for a portable map display device having a display unit and displaying a map on the display unit,
A setting step for setting one of a first screen display in which the predetermined direction of the display unit is vertical and a second screen display in which the predetermined direction is horizontal;
An azimuth acquisition step of acquiring an azimuth angle of the reference direction of the own device;
Based on the setting in the setting step, a control step of displaying the map so that a direction matching the azimuth is an upward direction on the display of the display unit;
A display control method for a portable map display device, comprising:

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