WO2006120850A1 - Portable route guiding device, route guiding method, route guiding program, and recording medium - Google Patents

Abstract

A flux (L) of visible laser light is projected to a projection surface (G) from a wristwatch (800) installed on the left hand of a user (H), and a guiding image (N) is displayed on the surface. When the user (H) twists, from this state, the left arm by 90 degrees as shown by the dashed lines, the attitude of the wristwatch (800) also changes by 90 degrees with the change of attitude of the left arm, and this causes a dial plate (803) of the wristwatch (800) to appear near the user (H). Even in this case, the guiding image (N) same as that shown by the solid lines can be displayed on the projection surface (G).

Description

 Specification

 Portable route guidance device, route guidance method, route guidance program, and recording medium

 Technical field

 The present invention relates to a portable route guidance device that guides a route, a route guidance method, a route guidance program, and a recording medium. However, the use of the present invention is not limited to the portable route guidance device, the route guidance method, the route guidance program, and the recording medium described above.

 Background art

 [0002] Conventionally, a guidance system for reducing the size and weight of a portable terminal and its cost has been disclosed.

 (Refer to Patent Document 1 below.) O This guidance system has a liquid crystal display panel, a solar cell panel as a power source, and a key input unit for selecting a location on the surface, and is flush with the liquid crystal display panel. Using a card-shaped mobile terminal with an arrow display in the vicinity that points in the direction of travel, the mobile terminal passes through the radio wave reach of each transmitter to determine the current position and travel direction. The relative direction of the destination with respect to the traveling direction is determined from the destination selected by the key input unit, and the relative direction is notified by an arrow on the liquid crystal display panel.

[0003] Also, the direction to the desired location and the map information are displayed so as to match the direction in which the mobile phone terminal is facing, and in which direction the user is! / If you have the power or progress! Azimuth display system for mobile phone terminals, mobile phone terminal with azimuth display function, orientation display method in mobile phone terminal, program, and computer-readable recording medium are disclosed (See Patent Document 2 below.) O This mobile phone terminal inputs destination information and transmits this destination information and the current location of the terminal to the orientation display system for mobile phone terminals. The azimuth and distance from the current position to the destination is calculated, and the azimuth and distance information to the destination is returned to the mobile phone terminal. The mobile phone terminal receives the azimuth and distance information to the destination, An arrow that points to the destination so that the orientation of the detected front of the mobile phone terminal is the front direction of the terminal and the orientation to the destination matches the state in which the predetermined front of the mobile phone terminal faces Distance and door Also display.

 [0004] Patent Document 1: Japanese Patent Laid-Open No. 2000-242885

 Patent Document 2: Japanese Patent Laid-Open No. 2003-299136

 Disclosure of the invention

 Problems to be solved by the invention

 However, in the above-described conventional technology, the guidance direction is indicated on the map of the display screen of the mobile terminal, and the orientation of the mobile terminal is maintained so that the display screen is approximately parallel to the ground. There is a need. Therefore, when the orientation of the mobile device changes and the display screen is not parallel to the ground, the meaning of the arrow indicating the direction of guidance is unclear, and accurate guidance cannot be performed. .

 [0006] When the guidance direction is displayed on the map of the display screen of the mobile terminal, the user of the mobile terminal at the current location compares the map on the display screen with the actual scene at the current location, An example is the problem that you have to move according to the guidance direction above! In particular, when an emergency decision is required, such as during a disaster, emergency evacuation guidance that cannot afford to compare the map with the scene at the current location cannot be performed! / It is done.

 [0007] In addition, a terminal without a display screen cannot display a map or a guidance direction, and the problem that guidance cannot be given is an example. In addition, even if you have a display screen, using the display screen reduces the remaining battery power, so it is difficult to guide the route when the remaining battery power is low. Can be mentioned.

 Means for solving the problem

[0008] The portable route guidance device according to the invention of claim 1 is a portable route guidance device that performs route guidance to a destination point, and an acquisition unit that obtains information on a current location of a moving object; Projection means for projecting a light beam onto a projection surface outside the moving body, and the current point that controls the projection means and follows the guide route to the destination point based on information on the current point acquired by the acquisition means And a projection control means for projecting the luminous flux so as to display a guidance image relating to the traveling direction from the projector. [0009] Further, the route guidance method according to the invention of claim 13 is based on the acquisition step of acquiring information on the current location of the mobile object, and the information on the current location acquired by the acquisition step. A projection step of projecting a light beam on a projection surface outside the moving body so as to display a guidance image relating to the traveling direction of the current point force following the guidance route.

 [0010] The route guidance program according to the invention of claim 14 causes a computer to execute the route guidance method according to claim 13.

 [0011] Further, a recording medium according to the invention of claim 15 is a computer-readable recording medium in which the route guidance program according to claim 14 is recorded. Brief Description of Drawings

 [0012] FIG. 1 is a block diagram showing a functional configuration of a portable route guidance device that is useful in an embodiment of the present invention.

 FIG. 2 is a plan view showing the direction of the apparatus main body.

 FIG. 3 is an explanatory diagram showing a projection plane direction and a projection direction in the XZ plane.

 FIG. 4 is an explanatory diagram showing a projection plane direction and a projection direction in the YZ plane.

 [FIG. 5] FIG. 5 is a flowchart showing a route guidance processing procedure that is relevant to the embodiment of the present invention.

 FIG. 6 is a block diagram showing a hardware configuration of the portable route guidance device.

 FIG. 7 is an explanatory diagram showing an example of a guide image displayed on the projection surface.

 FIG. 8 is an explanatory view showing an application example of the portable route guidance device.

 FIG. 9 is an explanatory view showing a usage example of the portable route guidance device shown in the application example of FIG.

 FIG. 10 is a flowchart illustrating a route guidance processing procedure that is relevant to the embodiment. Explanation of symbols

 [0013] 100 portable route guidance device

 101 Search unit

 102 Acquisition Department

103 Projection unit 104 Projection controller

 105 Detector

 106 Calculation unit

 111 Emitter

 112 Scanning unit

 200 Main unit

 601 CPU

 602 memory

 603 Input key

 604 display

 605 I / F

 606 Gyro

 607 GPS receiver

 608 Laser light source

 609 2D scanner

 610 drive circuit

 800 watches

 801 watch

 802 projection port

 803 dial

 F direction of travel

 G Projection surface

 H user

 L luminous flux

 N guidance video

 Sx reference axis (main scanning direction)

Sy orthogonal axis (sub-scanning direction)

T Projection direction V Projection plane direction

 3—horn

 β pitch angle

y mouth ¹ -angle

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, preferred embodiments of a portable route guidance device, a route guidance method, a route guidance program, and a recording medium according to the present invention will be described in detail with reference to the accompanying drawings. This portable route guidance device can be installed in mobile phones, watches, flashlights, portable radios, portable televisions, portable personal computers, PDAs, content players, etc. It can also be configured as a portable device.

 [0015] (Embodiment)

 First, the functional configuration of the portable route guidance device that is useful for the embodiment of the present invention will be described. FIG. 1 is a block diagram showing a functional configuration of a portable route guidance device according to an embodiment of the present invention. In FIG. 1, the portable route guidance apparatus 100 includes a search unit 101, an acquisition unit 102, a projection unit 103, a projection control unit 104, a detection unit 105, and a calculation unit 106.

 [0016] First, the search unit 101 searches for a guidance route to a destination point. Specifically, the search unit 101 can be realized by a known algorithm such as the Dijkstra method. In other words, using the link length (link length) and the road type included in the road network information, a guidance route such as the shortest route or the shortest route is searched. In addition, from the searched guidance route, the distance from the current point to the destination point, which will be described later, and the distance from the current point to the destination point can be obtained. The destination point can be set by user operation input or genre designation. In addition, the destination point may be a transit point represented by a node or a link shape supplement point in the middle of the guide route that goes only by the final destination point.

[0017] In addition, the acquisition unit 102 acquires information regarding the current location of the moving object. The moving body is, for example, a user who holds the apparatus main body or a vehicle (automobile, motorcycle, bicycle) on which the user is boarded. The acquisition unit 102 is a GPS receiver, for example, and receives radio waves from GPS satellites. It consists of an antenna for transmitting, a tuner that demodulates received radio waves, an arithmetic circuit that calculates the current position based on the demodulated information, and the like. As a result, the acquisition unit 102 can acquire the current location of the moving object by receiving radio waves of GPS satellite power and obtaining the geometric position with the GPS satellite. If the GPS receiver cannot receive the signal, such as when the user is in the facility, the acquisition unit 102 uses the wireless LAN or Bluetooth to determine the communication equipment installed in the facility. It can also be configured to receive information.

 [0018] Projection unit 103 projects a light beam onto a projection surface outside the moving body. Here, if the moving body is a user, the projection surface outside the moving body is specifically, for example, the ground, floor surface where the user is moving (walking), or walls on both sides of the user. If it is within the facility, the ceiling surface is also included. Specifically, the projection unit 103 includes, for example, a light projecting unit 111 that outputs visible laser light, a scanning unit 112 that scans the visible laser light output from the light projecting unit 111, and a two-dimensional scanner that also includes force. It is. Thereby, the visible laser beam scanned by the scanning unit 112 can be projected onto the projection surface as a light beam. In addition to the 2D scanner, a projector may be used.

 In addition, the projection control unit 104 controls the projection unit 103 and relates to the traveling direction from the current point following the guidance route to the destination point based on the information about the current point acquired by the acquiring unit 102. A light beam is projected so as to display a guidance image. In other words, the direction of travel is the direction that points to the arrival point along the route from the current point to the destination point, not the direction that points from the current point to the destination point. Specifically, this arrival point corresponds to, for example, a waypoint represented by a road network information node or a link shape complement point.

[0020] Further, the projection control unit 104 controls the projection unit 103 so that an arrow, a line, a circular figure, or a polygon figure indicating the traveling direction, or these are indicated on the projection surface on which the light beam is projected. It is possible to display (draw) guidance images that have combined graphic power. In addition, the length of this figure in the direction of travel can also be set according to the distance to the current point force arrival point. For example, for a figure with a distance of 30 [m] and a figure with a distance of 50 [m], the figure with a distance of 50 [m] will project a light flux so that the length in the direction of travel is longer. . [0021] Further, the projection control unit 104 controls the projection unit 103, so that a character string indicating the distance from the current point position to the arrival point in the traveling direction on the projection surface on which the light flux is projected, or the current point It is also possible to display a guidance image including a character string indicating the distance from the destination to the destination point, and it is also possible to display a guidance image including a graphic showing a map near the current location.

 In addition, the detection unit 105 detects the direction of the device main body of the portable route guidance device 100. Specifically, it detects the direction in which the reference axis of the device body is facing. Here, as described above, the device main body is a mobile phone, wristwatch, flashlight, portable radio, portable television, portable personal computer, PDA, portable phone incorporating the portable route guidance device 100 as described above. It is the main body of portable devices such as portable game machines and content players, or portable devices dedicated to route guidance. Here, the direction of the apparatus main body will be described with reference to the drawings. FIG. 2 is a plan view showing the direction of the apparatus body. In a three-dimensional space consisting of the X, Y, and Z axes, the horizontal plane is the XY plane and the vertical axis is the Z axis.

 In FIG. 2, the reference axis Sx of the apparatus main body 200 is, for example, the main scanning direction of the two-dimensional scanner, and coincides with the X-axis direction when there is no deviation in the attitude of the apparatus main body 200. Further, the axis Sy orthogonal to the reference axis Sx is the sub-scanning direction of the two-dimensional scanner, and coincides with the Y-axis direction when there is no deviation in the posture of the apparatus main body 200. The detection unit 105 detects the orientation of the reference axis of the apparatus main body 200 that changes its posture according to the movement of the moving body using a gyro.

 Specifically, the orientation of the reference axis Sx of the apparatus main body 200 in the three-dimensional space (XYZ space) is detected by integrating the angular velocity of the apparatus main body 200 obtained from the gyro. More specifically, the detection unit 105 detects a deviation of the reference axis Sx around the X axis (roll angle), a deviation around the Y axis (pitch angle), and a deviation around the Z axis (horizontal angle). Become. In addition, there are mechanical gyros, vibratory gyros, and optical gyros, but the portable route guidance device 100 requires portability and miniaturization, so vibration gyros and optical gyros are used. It is preferable.

Further, the calculation unit 106 calculates an angle (calculation angle) between the traveling direction and the direction of the apparatus main body 200 detected by the detection unit 105. This calculated angle is a single angle _α indicating the deviation of the reference axis Sx around the Z axis. In FIG. 2, when the traveling direction is F, when the reference axis Sx coincides with the X-axis direction, the light beam L is projected as it is onto the projection surface G, and the traveling direction F is projected onto the projection surface G. A guide image N is displayed. On the other hand, if the reference axis Sx is displaced by a single angle around the Z axis as indicated by the alternate long and short dash line, the light flux L is projected onto the projection surface G by applying this single-angle rotation correction. The guidance image α that is the same direction as the traveling direction F indicated when there is no deviation of the angle α can be displayed.

 The detection unit 105 detects the direction of the projection surface G from the apparatus main body 200 and the projection direction of the light beam L. Here, the direction of the projection surface G (projection surface direction) and the projection direction will be described with reference to the drawings. 3 and 4 are explanatory diagrams showing the projection plane direction and the projection direction. 3 and 4, the direction of the projection plane G (projection plane direction) V indicates the vertical direction, that is, the downward direction of the heel axis. That is, the projection plane direction V always indicates the vertical direction regardless of the posture of the apparatus main body 200.

 [0027] The projection direction Τ is a predetermined direction based on the main scanning direction (reference axis Sx) of the two-dimensional scanner, and changes as the reference axis Sx changes. Therefore, the projection direction T is automatically specified by detecting the direction of the reference axis Sx. Here, the projection direction T coincides with the projection plane direction V when the reference axis Sx of the apparatus body 200 coincides with the X-axis direction.

 In this case, the calculation unit 106 calculates the angle between the projection surface direction V and the projection direction T. This calculated angle is the pitch angle β (see Fig. 3) indicating the deviation of the reference axis Sx around the Y axis or the roll angle γ (see Fig. 4) showing the deviation of the reference axis Sx around the X axis. . Then, the projection control unit 104 controls the projection of the luminous flux based on the calculated pitch angle j8 (or roll angle γ). Specifically, when the pitch angle β (or roll angle γ) is within a predetermined range, the light flux L is projected, and when the pitch angle β is out of the predetermined range, the projection of the light flux L is stopped. This predetermined range can be arbitrarily set. The pitch angle β and roll angle γ are set to different ranges.

That is, when the pitch angle j8 (or roll angle γ) is out of the predetermined range, the luminous flux L is not projected onto the projection surface G such as the ground or floor surface, so that It will be projected directly. Therefore, safety can be improved by automatically stopping projection without the user being aware of it. Note that the change in the roll angle γ can be ignored when projection on the wall surface is considered. [0030] Next, a route guidance processing procedure that is relevant to the embodiment of the present invention will be described. FIG. 5 is a flowchart showing a route guidance processing procedure that is relevant to the embodiment of the present invention. In FIG. 5, first, the search unit 101 searches for a guidance route (step S501), and the acquisition unit 102 acquires current location information (step S502). Next, direction detection is performed by the detection unit 105 (step S503). Specifically, the direction in which the reference axis Sx of the apparatus main body 200 faces, the projection surface direction V, and the projection direction T are detected. Then, the calculation unit 106 calculates the angle (step S504). Specifically, the angle a indicating the deviation of the reference axis Sx from the X-axis direction, the pitch angle β and the roll angle γ, which are the angles between the projection surface direction V and the projection direction T, are calculated.

 Thereafter, the projection control unit 104 determines whether or not the angle between the projection plane direction V and the projection direction Τ is within a predetermined range (step S505). That is, it is determined whether or not the pitch angle j8 and the roll angle γ force S are within a predetermined range. If it is within the predetermined range (step S50 5: ¥), the light beam is projected onto the projection surface 0 (step 3506). On the other hand, when it is outside the predetermined range (step S505: No), the projection of the light beam L is stopped (step S507). Note that the roll angle γ may be ignored when irradiation to side surfaces such as wall surfaces is allowed.

 As described above, in this embodiment, the guidance image が having the same traveling direction F and the same direction of the character string is always displayed on the projection plane G, regardless of how the posture of the apparatus main body 200 changes. And can provide accurate guidance.

 [0033] In addition, the user who has the portable route guidance device 100 at the current location compares the map on the display screen with the actual scene at the current location, and moves according to the guidance direction on the map. By visually recognizing only the guidance image 投射 projected on the projection surface G without having to check whether it is ゝ or not, the traveling direction F can be grasped easily and intuitively. In particular, emergency evacuation guidance can be performed when an instantaneous judgment is required, such as during a disaster.

[0034] Even if the portable route guidance device 100 does not have a display screen, the traveling direction F and a map in the vicinity thereof can be displayed on the projection plane G. As a result, it can be applied to portable terminals such as portable radios, flashlights, music players, etc. that do not have a display screen or are very small even if they are present. If you do not want to turn on the display screen, such as when the battery level is low, even if you have a display screen, the projection screen G By projecting the light flux L onto the screen and displaying the guidance image N, it is possible to guide the route with peace of mind.

 Example

 Next, an example of the portable route guidance apparatus 100 according to the above-described embodiment will be described. First, the hardware configuration of the portable route guidance device 100 described above will be described. FIG. 6 is a block diagram showing a hardware configuration of the portable route guidance device 100. As shown in FIG. In FIG. 6, the portable route guidance device 100 includes a CPU 601, a memory 602, an input key 603, a display 604, an I / F 605, a gyro 606, a GPS receiver 607, a laser light source 608, A two-dimensional scanner 609, a drive circuit 610, and a force are also configured. Each component 60 1 to 610 is connected to a bus 600.

 Here, the CPU 601 governs overall control of the portable route guidance device 100. The memory 602 includes a recording medium such as ROM, RAM, HD, flash memory, and the like, and stores various programs. The memory 602 is used as a work area for the CPU 601. An input key 603 is an operation button for inputting characters, numerical values, various instructions, and the like.

 [0037] The display 604 displays icons, cursors, menus, windows, or various data such as characters and images. As this display 604, for example, a CRT, TFT liquid crystal display, plasma display or the like can be adopted.

 [0038] The IZF 605 is connected to a network wirelessly or via a communication cable, and functions as an interface between the network and the CPU 601. The network includes LAN (including wireless LAN), WAN, public network and mobile phone network. In addition, Bluetooth can be applied as IZF605.

 The gyro 606 is a sensor that measures the rotational angular velocity of the apparatus main body 200. By integrating this rotational angular velocity, the direction of the apparatus body 200 in the three-dimensional space can be output. The gyro 606 includes mechanical gyros, vibration gyros, and optical gyros. The portable portable route guidance device 100 requires portability and miniaturization, so it is preferable to use vibration gyros and optical gyros. Better ,.

[0040] GPS receiver 607 includes an antenna for receiving radio waves from GPS satellites, a tuner for demodulating the received radio waves, and an operation for calculating the current position based on the demodulated information. It is composed of a circuit, etc., and it can acquire the current location of the moving object by receiving the radio wave of GPS satellite power and obtaining the geometric position with respect to the GPS satellite.

 The laser light source 608 is a semiconductor laser light source that emits visible laser light from the drive circuit 610. The irradiated visible laser light is two-dimensionally scanned by the two-dimensional scanner 609 and projected onto the projection surface G. In addition, the two-dimensional scanner 609 causes the drive circuit 610 to emit visible laser light from the laser light source 608 in the main scanning direction (hereinafter referred to as main scanning direction Sx) that is the direction of the reference axis Sx shown in FIGS. ) Or in the sub-scanning direction (hereinafter referred to as sub-scanning direction Sy) which is the direction of the axis Sy orthogonal to the reference axis Sx.

 [0042] Specifically, for example, a scanner such as a polygon scanner, a galvano scanner, and a resonant scanner can be adopted for the two-dimensional scanner 609 for each of the scanning directions Sx and Sy. Each scanner projects visible laser light linearly or in a sinusoidal form. The guide image N can be freely drawn on the projection plane G by the two-dimensional scanner 609 formed by a combination of the two scanners in the scanning directions Sx and Sy.

 The drive circuit 610 drives the laser light source 608 and the two-dimensional scanner 609 by giving a drive signal to the laser light source 608 and the two-dimensional scanner 609 based on a command from the CPU 601. Specifically, the laser light source 608 is supplied with a driving signal related to the driving timing of the visible laser beam, the switching frequency, and the duty of the output.

 For the two-dimensional scanner 609, a drive signal related to mirror rotation speed control, rotation start, and supply voltage is given to each scanner constituting the two-dimensional scanner 609. In particular, these drive signals for each scanner are given in response to a command from the CPU 601 regarding the direction of the apparatus body 200, the current position force, and the distance to the arrival point. The drive circuit 610 emits visible laser light from the laser light source 608, the visible laser light is two-dimensionally scanned by the two-dimensional scanner 609, and the two-dimensionally scanned visible laser light is projected onto the projection plane G. As a result, a desired guidance image N can be displayed on the projection surface G. Note that a projector may be used instead of the laser light source 608 and the two-dimensional scanner 609 described above.

[0045] Note that the search unit 101, the acquisition unit 102, the projection control unit 104, the detection unit 105, and the calculation unit 106 illustrated in FIG. 1 are specifically recorded in, for example, the memory 602 illustrated in FIG. Prodara The function is realized by the CPU 601 executing the program. Further, the projection unit 103 realizes its function by the laser light source 608, the two-dimensional scanner 609 and the drive circuit 610 shown in FIG. 6, or by the projector and the drive circuit 610.

[0046] Next, an example of the guide image N displayed on the projection surface G will be described. FIG. 7 is an explanatory diagram showing an example of the guide image N displayed on the projection surface G. In FIG. 7, graphics N1 to N6 that are guide images N represent arrows indicating the traveling direction F. In figures N1 to N6, the length in the main scanning direction Sx represents the length from the current point to the destination point. In addition, as in the figures N5 and N6, a character string “10m” indicating the distance from the current position to the arrival point can be displayed. Further, like the figure N6, the force of the arrow figure N6a and the map figure N6b may be displayed. This map figure N6b represents a crossroad here.

 Next, an application example of the portable route guidance device 100 described above will be described. FIG. 8 is an explanatory diagram showing an application example of the portable route guidance device 100. FIG. 8 shows the case where the portable route guidance device 100 is applied to the wristwatch 800. The portable route guidance device 100 is built in the wristwatch 800. A projection port 802 is formed in the watch unit 801 of the wristwatch 800, and a luminous flux L of visible laser light is projected from the projection port 802. The dial 803 of the clock 801 may display the distance from the current location to the destination (“20m” and “V” in FIG. 8)! /.

Next, a usage example of the portable route guidance device 100 shown in the application example of FIG. 8 will be described. FIG. 9 is an explanatory diagram showing a usage example of the portable route guidance device 100 shown in the application example of FIG. In FIG. 9, a visible laser beam L is projected onto the projection surface G from the wrist watch 800 worn on the left hand of the user H, and a guidance image N is displayed. From this state, if user H twists his left arm 90 degrees as shown by the dotted line, the posture of watch 800 also changes 90 degrees with the change in posture of the left arm, so that dial 803 of watch 800 is in front of user H. Appears. Even in this case, the same guidance image N as shown by the solid line can be displayed on the projection surface G. In FIG. 9, the case where the wristwatch 800 is worn on the left hand has been described. However, by setting whether the hand to be worn is the right hand or the left hand, irradiation is always performed in front of the body. It can also be calibrated. [0049] Next, a route guidance processing procedure that is useful in this embodiment will be described. FIG. 10 is a flowchart showing the route guidance processing procedure that is relevant to this embodiment. In FIG. 10, first, the starting point and the destination point are input from the input key 603 to search for the guidance route (step S 1001), and the GPS receiver 607 is used to acquire the current point information ( Step S 1002).

 [0050] Then, it is determined whether or not the current point is a force that also deviates the guidance path force (step S1003). If the current position is out of the guide route force (step S 1003: Yes), the process proceeds to step S 100 1 to search for the guide route again, that is, to reroute. On the other hand, if the current point does not deviate from the guidance route force (step S 1003: No), that is, if the current point is on the guidance route, direction detection is performed (step S 1004). Specifically, the direction of the apparatus main body 200 (direction of the reference axis Sx in the three-dimensional space), the projection plane direction V, and the projection direction T are detected.

[0051] Next, angle calculation is performed (step S1005). Specifically, the angle α indicating the deviation of the main body 200 around the Z axis, the pitch angle 13 indicating the deviation around the axis X, and the roll angle _示 indicating the deviation around the X axis are calculated. The angle a represents the horizontal displacement of the apparatus body 200, and the pitch angle β and the roll angle γ represent the angle between the projection surface direction V and the projection direction Τ. Then, it is determined whether or not the pitch angle j8 (or Z and roll angle Ύ) is within a predetermined range (step S1006).

 [0052] If not within the predetermined range (step S1006: No), the process proceeds to step S1003, and the projection of the light flux L is stopped by determining whether or not the current point is out of the guide path force. It will be. As a result, it is possible to prevent the danger of accidentally projecting the light beam L horizontally or upward onto the eyes of others. On the other hand, if it is within the predetermined range (step S1006: Yes), it is determined that the light beam L is not projected onto the eyes of others, and the distance to the arrival point is calculated (step S1007).

Then, based on the data regarding the direction detected in step S 1004 and the distance calculated in step S 1007, scanning data regarding the guide image N is set (step S 1008). Specifically, the scan data is, for example, character string information such as the shape of a graphic displayed on the projection plane G, the scan amplitude of the arrow, and the distance. This scan data is supplied to the drive circuit 610. Given to.

 [0054] When the scan data described above is given, the drive circuit 610 sets a drive signal for the two-dimensional scanner 609 (step S1009), and applies a voltage corresponding to the scan data to the two-dimensional scanner 609. Then, the light flux L is projected onto the projection surface G (step S1010). As a result, the same guidance image N can be displayed on the projection surface G regardless of the posture of the apparatus main body 200. If the power supply or route guidance is turned off (step S1011: Yes), the series of processing ends. On the other hand, if it remains ON (step S 1011: No), the process proceeds to step S 1003.

 [0055] As described above, according to the portable route guidance device 100, the route guidance method, the route guidance program, and the recording medium, regardless of the direction of the device body 200 (direction of the reference axis Sx), the traveling direction A guidance image N with the same direction pointing to F can be displayed on the projection surface G outside the moving body.

 [0056] In the conventional route guidance device, when there are multiple candidates for a complicated direction with several right turn roads and confusing directions F such as five differences on the screen, On the other hand, in order to give directions of directions without roads, such as where to walk in a plaza or park, it is impossible to give accurate instructions that make it difficult to match the actual directions with the screen.

 On the other hand, in the present embodiment and example, since a character string such as the distance to the arrival point is also projected, it can be said that the character string is displayed in the same direction as the direction indicating the traveling direction F. . As a result, the traveling direction F and distance can be recognized simultaneously and intuitively. In this way, the direction of the character string and the traveling direction F correspond to each other, so that the traveling direction F can be easily determined.

 [0058] In addition, in the configuration in which the display is performed on the display screen of a portable terminal such as a conventional mobile phone or PDA, the direction of the character string is shown corresponding to the direction of the display screen. If you try to align it with the direction that points to the direction of travel F, etc., you must rotate the mobile device itself, and naturally the direction is displayed only with arrows, and the direction of character information etc. corresponds to the direction of travel F First of all, it is necessary to confirm the direction of travel F using only the arrows.

[0059] After that, when the body is rotated in the traveling direction F, the direction of the apparatus main body 200 is reversed. If only the user H's body is rotated while maintaining the above, it is impossible to obtain the same action unless it is done. Even in this way, it is difficult to instantly determine a complicated direction.

 [0060] On the other hand, in the present embodiment and examples, since the traveling direction F is directly indicated on the projection surface G such as the ground, floor, wall surface, ceiling surface, etc., the traveling direction is easy and intuitive. F can be seen. Therefore, the user H can be accurately guided according to the traveling direction F.

 [0061] The current location information is acquired using the GPS receiver 607, but the communication device installed in the facility also receives the current location information. Specifically, when conducting evacuation guidance in a facility such as a school, department store, office building, station, condominium, hotel, etc., the current location is determined from the communication equipment in the facility via a wireless LAN via Bluetooth. In the event of a disaster, a light beam L can be projected on the floor, wall, and ceiling so that a guidance image N showing the direction of travel F following the guidance route to the evacuation exit as the destination will be displayed. Even in emergencies such as, it is possible to easily and intuitively instruct the direction of travel F to guide the user H to the exit accurately.

 [0062] In the above-described embodiments and examples, since it is not necessary to display on the display screen, even if only the user H has the portable route guidance device 100, the user H moves with the user H. The other person grasps the direction of travel F only by visually recognizing the guidance image N displayed on the projection surface G such as the ground without entering the display screen of the portable route guidance device 100. This is also effective for group behavior.

 It should be noted that the route guidance methods described in the present embodiment and examples can be realized by executing a prepared program on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read out by the computer. Further, this program may be a transmission medium that can be distributed through a network such as the Internet.

Claims

The scope of the claims  [1] In a portable route guidance device that guides the route to the destination,  An acquisition means for acquiring information on the current location of the moving object;  Projection means for projecting a light beam on a projection surface outside the moving body;  Controlling the projection means to display a guidance image relating to the direction of travel from the current location following the guidance route to the destination location based on the information relating to the current location obtained by the obtaining means. A portable route guidance device comprising: a projection control means for projecting the light flux.  [2] The projection control means includes:  2. The light beam according to claim 1, wherein the light flux is projected so that the guidance image becomes an arrow, a line, a circular figure, a polygon figure, or a figure obtained by combining these, indicating the traveling direction. Portable route guidance device. [3] The projection control means includes:  3. The portable route guidance device according to claim 2, wherein the luminous flux is projected so that a length of the figure in the traveling direction is a length corresponding to a distance to the arrival point in the traveling direction. . [4] The projection control means includes:  The light beam is projected so that the guidance image is a character string indicating a distance from the current point to the arrival point in the traveling direction. Portable route guidance device. [5] The projection control means includes:  2. The portable route guidance device according to claim 1, wherein the light flux is projected so that the guidance image is a character string indicating a distance from the current location to the destination location.  [6] The projection control means includes:  2. The portable route guidance device according to claim 1, wherein the light flux is projected so that the guidance image becomes a figure showing a map near the current location. [7] The projection means includes A projecting unit that outputs visible laser light; and a scanning unit that scans the visible laser beam output from the projecting unit. The visible laser beam scanned by the scanning unit is used as the light flux. The portable route guidance device according to claim 1, wherein the portable route guidance device projects on a projection surface.  8. The portable route guidance device according to claim 1, wherein the projection means is a projector.  9. The portable route guidance device according to claim 1, wherein the acquisition unit is a GPS receiver.  10. The portable route guidance device according to claim 1, wherein the acquisition unit is a receiver that receives information on the current location from a communication device installed in a facility.  [11] detection means for detecting the direction of the apparatus body;  Calculating means for calculating an angle between the traveling direction and the direction of the apparatus main body detected by the detecting means;  The projection control means includes  2. The portable route guidance device according to claim 1, wherein the light beam is projected based on the angle calculated by the calculating means. [12] The detection means includes  Detecting the direction of the projection surface from the apparatus main body and the projection direction of the luminous flux;  Calculating the angle between the direction of the projection surface detected by the detection means and the projection direction of the luminous flux;  The projection control means includes  Furthermore, based on the angle between the direction of the projection plane calculated by the calculation means and the projection direction of the luminous flux! 12. The portable route guidance device according to claim 11, wherein the light beam is projected. [13] An acquisition process for acquiring information about the current location of the moving object; Based on the information about the current location acquired by the acquisition process, A projection step of projecting a light beam on a projection surface outside the moving body so as to display a guidance image regarding the traveling direction of the current point force following the guidance route at  A route guidance method comprising:  [14] A route guidance program that causes a computer to execute the route guidance method according to claim 13.  [15] A computer-readable recording medium on which the route guidance program according to claim 14 is recorded.