JP2008158842A - Map display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a map display device, capable of rotating a map displayed on a display screen by operating a touch panel. <P>SOLUTION: When rotating, the map 30, a plurality of points 41a-41e of the touch panel 21 are touched by a hand. The hand is rotated in the direction of an arrow 42. When the hand is separated from the touch panel 21 after rotating the hand, the map 30 is rotated at a predetermined angle in the direction of the arrow 42 around a predetermined point based on the touched points 41a-41e. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a map display device capable of rotating a map on a display screen.

Conventionally known is a navigation device that can rotate a map displayed on a display screen by operating a joystick or a rotary type operator (for example, Patent Document 1 and Patent Document 2).
JP 2002-257558 A JP 2005-30856 A

  In the conventional navigation apparatus as described in Patent Document 1 and Patent Document 2, even when the display screen is provided with a touch panel, a separate joystick or rotary type operator is not operated to rotate the map. Must not. Therefore, a map display device such as a navigation device that can rotate a map by operating a touch panel is desired.

(1) A map display device according to a first aspect of the present invention is a display monitor, touch position detecting means for detecting one or more touch positions on the display screen of the display monitor, and a map for displaying a map on the display monitor. Display control means, and the map display control means rotates the map in the direction of rotation when a touch position detection means detects that an operation that rotates in a touched state is touched at a plurality of locations on the display monitor. It is characterized by that.
(2) The invention of claim 2 is the map display device according to claim 1, wherein the map display control means determines an angle for rotating the map based on the rotation angle calculated from the detected rotation operation.
(3) The invention of claim 3 is the map display device according to claim 1 or 2, wherein the map display control means has a center for rotating the map based on a plurality of touch positions on the display screen of the display monitor. It is characterized by defining.
(4) The invention of claim 4 is the map display device according to claim 1 or 2, wherein the map display control means rotates the map around the center of the map.
(5) The invention of claim 5 is the map display device according to claim 1, wherein the map display control means is configured to enter a heading-up mode when the map displayed on the display monitor is in the north-up mode. In the heading-up mode, the map is rotated so as to be in the north-up mode.

  According to the present invention, the map displayed on the display screen can be rotated in the direction of the rotation operation by touching the touch panel at a plurality of locations and rotating the touch panel while touching. Therefore, there is no need to operate another input device in order to rotate the map displayed on the display screen.

  A configuration of a navigation apparatus according to an embodiment of the present invention is shown in FIG. The navigation device 1 in FIG. 1 is provided with a touch panel device that can detect a plurality of touch positions. Then, the navigation device 1 can be operated by touching the touch panel with a plurality of fingers and touching the plurality of fingers. The navigation device 1 includes a control circuit 11, ROM 12, RAM 13, current location detection device 14, image memory 15, display monitor 16, speaker 17, input device 18, touch panel device 19, and disk drive 111. The disk drive 111 is loaded with a DVD-ROM 112.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area. The control circuit 11 appropriately generates map image data when the map is rotated from the map data stored in the DVD-ROM 112. Thereby, the rotated map can be displayed on the display monitor 16.

  The current location detection device 14 is a device that detects the current location of the vehicle. The current location detection device 14 includes a vibration gyro 14a, a vehicle speed sensor 14b, a GPS (Global Positioning System) sensor 14c, and the like. The vibration gyro 14a detects the traveling direction of the vehicle, the vehicle speed sensor 14b detects the vehicle speed, and the GPS sensor 14c detects a GPS signal from a GPS satellite. The navigation device 1 determines the display range of the map based on the current location of the vehicle detected by the current location detection device 14 and displays the current location as a vehicle position mark on the map.

  The image memory 15 stores image data to be displayed on the display monitor 16. This image data includes road map drawing data and various graphic data. These are appropriately generated in the control circuit 11 as described above based on the map data stored in the DVD-ROM 112.

  The disk drive 111 reads map data from the DVD-ROM 112. The map data includes map display data and the like. The map display data includes road link information and node information stored in the map data. The map display data has map data of a plurality of scales from wide areas to details, and the scale of the display map can be changed according to a user request. The map data may be read from a recording medium other than the DVD-ROM 112, such as a CD-ROM or a hard disk.

  The display monitor 16 provides the user with various information such as a map near the vehicle position as a screen display based on various information such as map data. The speaker 17 instructs the user to perform various input operations. The input device 18 has operation keys for the user to set various commands and input search conditions, and is realized by a button switch on the operation panel, a hard switch around the panel, or the like.

  The touch panel device 19 is a device that detects a touch position of a touch panel provided on the display screen of the display monitor 16. The display screen of the display monitor 16 is displayed through the touch panel device 19. Details of the touch panel device 19 will be described with reference to FIG.

  As shown in FIG. 2A, the touch panel device 19 includes a touch panel 21, two optical units 22 a and 22 a, and a retroreflective frame 23. The optical units 22a and 22b have light irradiators 24a and 24b and light receivers 25a and 25b. The light irradiators 24 a and 24 b are composed of LEDs or the like, and irradiate the plane light parallel to the touch panel 21 at an irradiation angle where two sides of the retroreflective frame 23 enter. The light receiving units 25a and 25b are configured by a lens, an image sensor, and the like, and receive the planar light reflected by the retroreflective frame 23 in a field of view where the two sides of the retroreflective frame 23 enter, and shadows generated by blocking the planar light. The position of is detected. The retroreflective frame 23 is provided so as to surround the touch panel 21 and reflects incident light in the light source direction.

  The touch position of the touch panel 21 is detected as follows. When the touch panel 21 is not touched, all the planar light emitted from the optical units 22a and 22b is reflected by the retroreflective frame 23 without being blocked by any object. For this reason, no shadow is detected within the range of the visual field detected by the light receiving units 25a and 25b.

  However, as shown in FIG. 2B, when the touch panel 21 is touched at the touch position 26, the planar light emitted from the optical units 22a and 22b is blocked by a finger or a touch pen touching the touch panel 21. The planar light is not reflected from the retroreflective frame 23 in the touched direction. On the light receiving portions 25a and 25b of the optical units 22a and 22b, shadows are reflected based on the output signals of the light receiving portions 25a and 25b in which reflected light having shadows is incident at positions corresponding to the directions (α, β) of the touch position 26. Is detected, the position of the shadow is output to the touch panel control unit 110. The touch panel control unit 110 calculates the position where the plane light is blocked, that is, the coordinates (X, Y) of the touch position 26 using the triangulation method from the direction of the shadow detected by the optical units 22a and 22b. The touch position detected as described above is output to the control circuit 11. By repeatedly performing the above operations, a finger trajectory or the like can be detected as will be described later.

  When there are a plurality of touch positions, among the touch position candidates calculated from the shadow direction (for example, when there are two touch positions, there are four touch position candidates), the optical units 22a and 22b An accurate touch point described in Japanese Patent Laid-Open No. 2003-330603, for example, by comparing the distance between the touch position candidate and the light reception level when the optical units 22a and 22b detect a shadow. The true touch position is determined by a coordinate detection method or the like that can be determined, and a plurality of touch positions are detected.

  The touch panel device 19 of FIG. 1 has an input function like the input device 18. When the map screen, various buttons, display menu, etc. displayed on the display monitor 16 are touched with a finger, the touch panel 21 is touched, and the touch position is calculated by the touch panel control unit 110. Then, the calculated touch position is input to the control circuit 11, and processes defined in various buttons and display menus are executed. Further, the map displayed on the display monitor 16 can be rotated by a touch operation described later.

  Next, the touch operation for rotating the map in the embodiment of the present invention will be described with reference to FIGS. Here, it is assumed that the user rotates the map and switches the map display from the heading-up mode to the north-up mode.

  FIG. 3 is a diagram for explaining a map 30 around the vehicle position displayed on the display monitor 16. On the display screen, the map 30 is displayed in the heading-up mode with the vehicle traveling direction up, and the vehicle position mark 31 and the direction mark 32 are displayed on the map 30. The orientation mark 32 is a mark indicating the north direction on the map. In FIG. 3, the map 30 is displayed with the northeast facing upward.

  When rotating the map 30, as shown in FIG. 4, a plurality of locations 41 a to 41 e of the touch panel 21 are touched by hand. Then, with the touch panel 21 touched, the hand is rotated in the direction of the arrow 42 which is the direction in which the map is to be rotated. Here, in order to display the map 30 in the north up mode, it is necessary to rotate the map 30 by 45 ° clockwise. In this case, the hand is rotated at an angle of 45 ° in the direction of the arrow 42.

  After the hand is rotated, when the hand is released from the touch panel 21, the map 30 is rotated by 45 ° in the direction of the arrow 42 around a predetermined location (hereinafter referred to as touch center) based on the touched locations 41a to 41e. . Then, as shown in FIG. 5, the map 30 in the north up mode is displayed on the display monitor 16.

  Next, map rotation display processing will be described with reference to the flowchart of FIG. The processing in FIG. 6 is executed in the control circuit 11 by a program that starts when the display screen of the display monitor 16 on which the map 30 is displayed is touched.

  In step S601, the touch position of the touch panel 21 is detected based on the touch position calculated by the touch panel control unit 110. In step S602, it is determined whether there are two or more touch positions. If there are two or more locations, an affirmative determination is made in step S602, and the process proceeds to step S603. If there are not two or more places, that is, if only one touch position is detected, a negative determination is made in step S602, and the process ends.

In step S603, the touch center of the touch position is calculated. For example, as shown in FIG. 7, five touch positions 41a (X1, Y1), 41b (X2, Y2), 41c (X3, Y3), 41d (X4, Y4), 41e (X5, Y5) are detected. In the case of being performed, the touch positions 41a (X1, Y1) and 41e (X5, Y5) at both ends are extracted from the distributed touch positions. The middle position between the touch positions 41a (X1, Y1) and 41e (X5, Y5) at both ends is defined as a touch center G (XC, YC). Then, the touch center is calculated as follows.

In step S604, the rotation angle of the touch position with respect to the touch center G is calculated. Calculation of the rotation angle of the touch position will be described with reference to FIG. A reference line 81 is calculated with the touch position G as the starting point and the direction as the upward direction of the map 30. Then, the rotation angle of each touch position with respect to the reference line 81 is calculated. For example, the rotation angle of the touch position 41c is θ3a as shown in FIG. After calculating the rotation angle of each touch position, the average value of the rotation angles of the five touch positions is calculated as in the following equation. This average value is the rotation angle (θa) of the touch position.

  In step S605, the coordinates of the touch center G and the rotation angle (θa) of the touch position are stored in the RAM 13. In step S606, it is determined from the signal output from the touch panel device 19 whether the touch panel 21 is touched. If touched, an affirmative decision is made in step S606, and the process proceeds to step S607. If not touched, a negative determination is made in step S606, and the process proceeds to step S609.

  In step S <b> 607, the touch position of the touch panel 21 is detected based on the touch position calculated by the touch panel control unit 110. In step S608, the touch position is stored in the RAM 13. Then, the process returns to step S606.

  In step S609, the last detected touch position is called from the RAM 13. In step S610, the rotation angle (θb) of the touch position with respect to the touch center G is calculated by the same method as in step S604. In step S611, a difference (θ) between the rotation angle (θb) calculated in step S610 and the rotation angle (θa) of the first touch position, that is, the rotation angle (θa) of the touch position calculated in step S604 is calculated. . In step S612, as shown in FIG. 9, the map 30 is rotated clockwise by the difference (θ) in the rotation angle about the touch center G. Then, the process ends.

The navigation device 1 according to the above embodiment has the following operational effects.
(1) After touching the plurality of locations 41a to 41e of the touch panel 21 with a hand, if the hand is rotated while being touched, the map 30 can be rotated in the rotated direction. Therefore, in order to rotate the map 30, it is not necessary to operate a joystick or a rotary type operator separately, which is convenient. Further, since there is no need to provide the navigation device 1 with a joystick or a rotary type operator, the number of switches on the remote control or the operation panel can be reduced. Further, when the hand is rotated, the map 30 can be rotated, so that the uncomfortable feeling of the rotation operation of the map 30 can be eliminated.

(2) Since the map 30 can be rotated based on the rotation angle of rotating the hand, it is easy to control the rotation angle of the map 30.

(3) Since the map 30 can be rotated around the touch center G determined based on the locations 41a to 41e touched by hand, the map 30 can be rotated around a desired position.

The navigation apparatus 1 of the above embodiment can be modified as follows.
(1) When the rotation operation for rotating the map 30 described above was performed, the map 30 was rotated according to the rotation angle. However, if the rotation operation for rotating the map 30 described above is performed, the map display may be switched to the heading-up mode in the north-up mode and to the north-up mode in the heading-up mode regardless of the rotation angle. Good. This is convenient because it may be difficult to adjust the orientation of the map to the heading-up mode or the heading-up mode depending on the rotation angle of the rotation operation.

(2) The touch positions 41a (X1, Y1) and 41e (X5, Y5) at both ends are extracted from the distributed touch positions, and the touch positions 41a (X1, Y1) and 41e (X5, Y5) are extracted. The middle position is defined as the touch center G (XC, YC). However, the method for calculating the position of the touch center G is not limited to the embodiment. For example, an arc that most closely matches a plurality of detected touch positions may be calculated, and the center of a circle having the arc may be used as the touch center G. In this case, the number of touch positions must be 3 or more. The center of gravity of the touch position may be the touch center G.

(3) After touching the plurality of locations 41 a to 41 e of the touch panel 21 with the hand and then rotating the hand while touching, the map 30 is rotated around the touch center G. However, the map 30 may be rotated around the center of the map 30. When it is desired to rotate the map 30 around the center of the map 30, it may be difficult to touch the touch panel 21 so that the position of the touch center G matches the center of the map 30, which is convenient.

  The map display device is not limited to the navigation device 1. For example, a portable terminal may be used.

  The above description is merely an example, and the present invention is not limited to the above embodiment.

The correspondence between the elements of the claims and the embodiments will be described.
The touch position detection unit of the present invention corresponds to the touch panel device 19 and the touch panel control unit 110, and the map display control unit corresponds to the control circuit 11 and the image memory 15. In addition, the above description is an example to the last, and when interpreting invention, it is not limited to the correspondence of the component of said embodiment and the component of this invention at all.

It is a block diagram which shows the structure of the navigation apparatus of embodiment of this invention. It is a figure for demonstrating a touchscreen apparatus. It is a figure for demonstrating the map around the own vehicle position currently displayed on the display monitor. It is a figure for demonstrating operation which rotates a map. It is a figure for demonstrating the map after rotating. It is a flowchart for demonstrating the rotation process of the map in embodiment of this invention. It is a figure for demonstrating a touch center. It is a figure for demonstrating the rotation angle of a touch position. It is a figure for demonstrating rotation of a map.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 11 Control circuit 13 RAM
16 Display monitor 19 Touch panel device 21 Touch panel 30 Map 31 Vehicle position mark 32 Orientation mark 110 Touch panel control unit

Claims (5)

A display monitor;
Touch position detecting means for detecting touch positions at one place and a plurality of places on the display screen in the display monitor;
Map display control means for displaying a map on the display monitor,
The map display control means is configured to rotate the map in the rotated direction when the touch position detecting means detects an operation in which a plurality of locations on the display screen of the display monitor are touched and rotated while being touched. A featured map display device. The map display device according to claim 1,
The map display control means, wherein the map display control means determines an angle for rotating the map by a rotation angle calculated from the detected rotation operation. The map display device according to claim 1 or 2,
The map display control device determines a center for rotating the map based on a plurality of touch positions on a display screen of the display monitor. The map display device according to claim 1 or 2,
The map display control means, wherein the map display control means rotates the map around the center of the map. The map display device according to claim 1,
The map display control means rotates the map so that the map displayed on the display monitor is in the heading-up mode when the map is in the north-up mode, and is in the north-up mode when the map is in the heading-up mode. A map display device characterized by the above.

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