JP5723347B2 - Information display device - Google Patents

Description

  The present invention relates to an information display device.

  In recent years, portable electronic devices such as mobile phones and PDAs have become increasingly sophisticated with the improvement of processor processing power and the development of low power consumption technologies. For example, a navigation function using a GPS (global positioning system) that is widely used for in-vehicle use is being installed in mobile phones.

  For a mobile phone having a navigation function, there is a conventional technique described in Patent Document 1, for example.

  The technique described in Patent Literature 1 is to display the movement trajectory of the terminal on the map by sequentially plotting the position of the terminal on the map, but if the direction can be detected in the terminal Using the detection result, the map orientation can be displayed in accordance with the actual orientation, and a more practical navigation function can be realized.

  Direction detection is generally performed using a geomagnetic sensor. For example, a reference two-dimensional coordinate system is set on a plane parallel to the ground plane, and the strength of geomagnetism in each coordinate axis direction is measured by a geomagnetic sensor. The azimuth angle is obtained from the angle formed by the two-dimensional geomagnetic vector obtained by this measurement and the coordinate axis.

JP 2001-124581 A

By the way, many recent mobile phones have a display unit and a key input unit arranged in separate housings. This type of mobile phone is generally used in a state where the two housings are folded and the key input part is hidden inside (closed state), or the key input part and the display part are both exposed (open state). Is done.
As described above, in the case of a mobile phone having a structure in which the positional relationship between the two cases changes according to the operation style, the measurement direction of the geomagnetic sensor changes with the change of the operation style depending on the position where the geomagnetic sensor is arranged. May end up. That is, the case where the operation style is changed and the case where the user changes the orientation of the apparatus cannot be distinguished only by the direction detection result. Therefore, in order to correctly grasp the azimuth, it is necessary to determine whether or not the change in the measurement direction is due to a change in the operation style, and there is a disadvantage that the processing becomes complicated.

Further, the two-case type structure described above includes a type in which the display unit is hidden inside in a closed state and a type in which the display unit is exposed to the outside. The former type includes, for example, a type that is folded inward with the surface of the display unit and the surface of the key input unit facing each other. The latter type has, for example, a mechanism that relatively rotates the surface of the display unit and the surface of the key input unit in a substantially parallel state, and in the closed state, the key input unit is placed under the casing of the display unit. There is a type that hides the face.
In the case of the latter type, since the display unit can be used in both the open state and the closed state, if the direction of the display screen with respect to the user changes due to the change of the operation style, the picture or character image is accordingly changed. It is preferable that the display is rotated to make the display easier to see.
However, if the direction detection result changes with the change of the operation style as described above, the map image displayed on the display unit also rotates in accordance with this direction. Therefore, in order to display a map or characters with an appropriate orientation and arrangement on the display screen even when the operation style is changed, in addition to the change in the display screen direction due to the change of the operation style, the direction detection result A display image must be generated in consideration of changes, and there is a disadvantage that the processing becomes complicated.

  This invention is made | formed in view of this situation, The objective is to provide the information display apparatus which can display an image, such as a map and a character, on a display part in an appropriate state.

  The first information display device is an information display device that displays information on the position and orientation of the current location using a map, and includes a first housing and a reference set on the first housing. A azimuth detecting means for detecting a geographical azimuth of the direction; a display means for displaying at least the map; a second casing connected to the first casing via a movable mechanism; An operating state determining means for determining an operating state, a first display control means for controlling the orientation of the map on the display screen of the display means according to a detection result of the orientation detecting means, and an operating state determining means And a second display control unit that performs a predetermined rotation process on the display image including the map of the control result of the first display control unit according to the determination result.

The movable mechanism may have a plurality of operating states in which angles formed between the display screen of the display unit and the reference direction are different, and the azimuth detecting unit is configured to detect the plurality of operating states in the operating state determining unit. When any one is determined, the geographical direction on the ground plane may be detected on the assumption that the reference direction and the ground plane have a predetermined angle in the determined operating state.
In this case, the information display device includes a storage unit that stores a plurality of operation states that can be determined by the operation state determination unit and information on the predetermined angle in each of the operation states, and stores the direction. The detection means may acquire information on the predetermined angle associated with the determination result of the operating state determination means from the storage means.
In this case, the azimuth detecting means includes a geomagnetism detecting means for detecting geomagnetism in a plurality of predetermined directions parallel to the coordinate axes of the coordinate system set on the first casing, and the geomagnetism detecting means. Azimuth angle calculating means for calculating the azimuth angle on the ground plane based on the detected geomagnetism in the plurality of directions and the information on the predetermined angle corresponding to the determination result of the operating state determination means. Good.

Alternatively, the azimuth detecting unit may include an angle detecting unit that detects an angle formed by the reference direction and the ground plane, and may detect the geographical azimuth corresponding to the detection angle of the angle detecting unit.
In this case, the azimuth detection means is detected by the geomagnetism detection means for detecting geomagnetism in a plurality of predetermined directions parallel to the coordinate axes of the coordinate system set on the first casing, and the geomagnetism detection means. Azimuth angle calculating means for calculating the azimuth angle on the horizontal plane according to the geomagnetism in the plurality of directions and the detection angle of the angle detection means.

  In addition, the information display device is arranged at opposite ends of the first casing, and uses a magnet to convert an electric signal into sound or a sound into an electric signal. And the geomagnetism detecting means may be disposed between the sound converting means.

  According to the present invention, even if the screen direction of the display unit is changed, an image such as a map or a character can be displayed on the display unit in an appropriate state according to the operating state of the movable mechanism.

It is a block diagram which shows the structural example of the system for acquiring the information of geographical position and map in the mobile telephone which concerns on this embodiment. It is the figure which illustrated an example of the external appearance in the open state of a mobile telephone. It is the figure which illustrated an example of the external appearance in the closed state of a mobile telephone. It is a block diagram which shows the structural example of the mobile telephone which concerns on this embodiment. It is a block diagram which shows the structural example of an azimuth | direction detection part. It is the figure which illustrated the example of arrangement | positioning of a geomagnetism detection part. It is a figure for demonstrating the calculation method of an azimuth. It is a block diagram which shows an example of a functional structure of the program of the part relevant to the display control at the time of navigation. It is the figure which illustrated an example of the relationship between the reference direction of direction detection, and the reference direction on a display screen. It is the flowchart which illustrated the flow of the process regarding acquisition of a positional information and map information. It is the flowchart which illustrated the flow of the process in a 1st display control part and a 2nd display control part. It is a block diagram which shows the other structural example of an azimuth | direction detection part.

  Hereinafter, an embodiment of a multifunctional mobile phone having a navigation function and an imaging function will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration example of a system for acquiring geographical position and map information in the mobile phone 10 according to the present embodiment.

The mobile phone 10 receives signals transmitted from three or more GPS satellites 20 that go around a known orbit, and sends information related to the received signals from the base station 30 to the server device 40 via the communication network. Send.
Server device 40 calculates the geographical position of mobile phone 10 based on the information sent from mobile phone 10. Further, based on the calculated position, the map information around the mobile phone 10 is searched from the database. Then, the calculated position information and searched map information are transmitted from the communication network to the mobile phone 10 via the base station 30.

2 and 3 are diagrams illustrating an example of the appearance of the mobile phone 10 in the open state and the closed state.
2A, 2 </ b> B, and 2 </ b> C respectively show the front, side, and back side appearances of the mobile phone 10 in the open state.
3A, 3 </ b> B, and 3 </ b> C respectively show the front, side, and back side appearances of the mobile phone 10 in the closed state.

As shown in the figure, the mobile phone 10 has two casings (a first casing 101 and a second casing 102), and these casings are connected via a movable mechanism 103. .
Each of the first casing 101 and the second casing 102 has a plate-like shape close to a rectangle with rounded corners, and the sizes thereof are close to each other. These two casings are connected by the movable mechanism 103 with the rectangular surfaces facing each other at a portion near the center of the short side on one side on the rectangular surface. The movable mechanism 103 relatively rotates the two housings around a rotation axis extending in a direction penetrating each other's rectangular surfaces.

  In the open state, as shown in FIGS. 2A and 2C, the long sides of the two housings are parallel when viewed from the front or the back. The short sides of the respective housings on the side away from the connecting portion are arranged to face each other in parallel with the above-described rotation axis in between, and are in the most distant state. As shown in FIG. 2B, the second housing 102 is inclined with respect to the first housing 101 when viewed from the side.

  On the other hand, even in the closed state, as shown in FIGS. 3 (A) and 3 (C), the long sides of the two housings are in a parallel state. The short sides of the housing are arranged facing each other in parallel without interposing the above-mentioned rotation axis, and are in the closest state. As shown in FIG. 3B, the rectangular surfaces of the first housing 101 and the second housing 102 are substantially parallel when viewed from the side, and the two housings overlap each other. Become.

  An operation key 110 is arranged on the surface of the first casing 101 on the side in contact with the second casing 102 as shown in FIG. The operation keys 110 include keys for inputting numbers and symbols, keys for selecting and executing various functions, and the like, and are mainly used in the open state. In the closed state, as shown in FIG. 3, the cover is covered with the second housing 102 and becomes unusable. This operation key 110 is included in a key input unit 154 described later.

  Further, the left side surface of the first casing 101 (the side surface of the first casing 101 viewed from the direction of the arrow E) when the surface of the operation key 110 is viewed with the connecting portion facing upward is connected to the connecting portion. The operation key 120 is arranged on the near side. The operation key 120 includes keys for selecting and executing various functions, and is mainly used in the closed state. The operation key 120 is also included in the key input unit 154 in the same manner as the operation key 110.

  Further, a microphone hole 109 is provided at the approximate center of the lower side surface of the first casing 101 when the operation key 110 is viewed with the connecting portion facing upward.

  In addition, a rectangular display screen 104 is arranged on the surface of the second casing 102 on the side not in contact with the first casing 101 as shown in FIGS. 2 (A) and 3 (A). The The display screen 104 is configured by a display device such as an LCD (liquid crystal display) panel or an organic EL (electroluminescent) panel, and is included in a display unit 155 described later.

On the same surface as the display screen 104, speaker holes 106 and 107 are provided at positions close to the short sides at both ends with the display screen 104 interposed therebetween. The hole 107 is arranged near the short side on the connecting portion side, and the hole 106 is arranged near the short side on the opposite side.
Further, on this surface, a camera lens 105 is arranged at the lower left corner when viewed with the connecting portion facing down. The camera lens 105 is included in an imaging unit 157 described later.

  As shown in FIGS. 2C and 3C, a camera lens 125 and a flash lamp 126 are arranged on the surface of the first housing 101 on the side not in contact with the second housing 102. Has been. The camera lens 125 is disposed at a position close to the short side on the connection portion side on this surface, and the flash lamp 126 is disposed at a position on the lower left side of the camera lens 125 when the connection portion is viewed upward. ing. The camera lens 125 and the flash lamp 126 are included in the imaging unit 157.

FIG. 4 is a block diagram illustrating a configuration example of the mobile phone 10 according to the present embodiment.
4 includes a communication processing unit 150, a GPS reception unit 151, a storage unit 152, an open / close determination unit 153, a key input unit 154, a display unit 155, and a voice input / output unit 156. , An imaging unit 157, an orientation detection unit 158, and a control unit 159.
The open / close determining unit 153 is an embodiment of the operating state determining means.
The direction detection unit 158 is an embodiment of the direction detection means.

  The communication processing unit 150 performs processing related to wireless communication with the base station 30. For example, the transmission data output from the control unit 159 is subjected to predetermined modulation processing to be converted into a radio signal and transmitted from the antenna. In addition, a predetermined demodulation process is performed on the radio signal received by the antenna to reproduce the received data and output it to the control unit 159.

  The GPS receiving unit 151 receives a signal transmitted from the GPS satellite 20, performs signal processing such as amplification, noise removal, and modulation, and acquires information necessary for the server device 40 to calculate position information.

  The storage unit 152 stores a program executed by the control unit 159, constant data used in processing of the control unit 159, variable data that needs to be temporarily stored, captured image data, and the like.

  The open / close determining unit 153 determines whether the rotation state of the first housing 101 and the second housing 102 by the movable mechanism 103 is the above-described open state or closed state.

  When an input operation such as pressing a key is performed on the operation keys 110 and 120 described above, the key input unit 154 generates a signal corresponding to this and outputs it to the control unit 159.

  The display unit 155 displays an image corresponding to the image data generated by the control unit 159 on the display screen 104.

  The sound processing unit 156 converts the input sound into an electric sound signal by a microphone, performs signal processing such as amplification, analog-digital conversion, and encoding, and outputs the sound data of the processing result to the control unit 159. To do. In addition, audio data input from the control unit 159 is subjected to signal processing such as decoding, digital-analog conversion, and amplification to generate an audio signal, which is converted into audio by a speaker.

  The image capturing unit 157 captures an image incident on the camera lens 111 or 125 described above, generates still image data or moving image image data, and outputs the image data to the control unit 159. Further, the flash lamp 126 is turned on at the time of image capturing under the control of the control unit 159.

  The direction detection unit 158 detects the geographical direction of the reference direction Z set in advance on the first housing 101. The reference direction Z is set, for example, in a direction (see FIG. 9) from the short side of the first housing 101 on the side away from the connecting portion to the short side on the side close to the connecting portion.

  In addition, the direction detection unit 158 also considers the inclination angle of the reference direction Z with respect to the ground plane when detecting the direction.

In general, when the user places the display screen 104 in an easy-to-see position, the user tries to keep the direction of the line of sight with respect to the display screen 104 constant (for example, 45 ° with respect to the ground plane). On the other hand, as can be seen by comparing FIG. 2B and FIG. 3B, the reference direction Z and the display screen 104 are substantially parallel in the closed state, whereas the display screen 104 is in the open state. Inclined with respect to the reference direction Z. Therefore, if the direction of the line of sight with respect to the display screen 104 is to be kept constant in both operation styles, the inclination of the reference direction Z with respect to the ground plane is steeper in the closed state than in the open state.
Therefore, the direction detection unit 158 detects the geographical direction assuming that the inclination angle of the reference direction Z with respect to the ground plane is a predetermined angle corresponding to the determination result of the open / close determination unit 153.

  The information on the tilt angle is stored in advance in the storage unit 152 as, for example, a data table. When the azimuth is detected, the control unit 159 reads information on the inclination angle associated with the determination result of the open / close determination unit 153 from the data table and passes it to the azimuth detection unit 158. The azimuth detecting unit 158 detects the azimuth based on the information on the tilt angle acquired from the control unit 159.

  Here, a more detailed configuration of the orientation detection unit 158 will be described with reference to FIGS.

FIG. 5 is a block diagram illustrating a configuration example of the direction detection unit 158.
The azimuth detection unit 158 illustrated in FIG. 5 includes a geomagnetism detection unit 1581 and an azimuth angle calculation unit 1582. The geomagnetism detection unit 1581 is an embodiment of a geomagnetism detection unit.
The azimuth angle calculation unit 1582 is an embodiment of an azimuth angle calculation unit.

The geomagnetism detection unit 1581 detects geomagnetism in a plurality of predetermined directions parallel to the coordinate axes of the coordinate system set in the first housing 101. For example, the three-axis geomagnetic component S1 in each coordinate axis direction of the three-dimensional rectangular coordinate system set in the first casing 101 is detected.
Various methods such as a method using coil excitation, a method using the Hall effect, and a method using a magnetoresistive element can be used to detect geomagnetism.

  The geomagnetism detection unit 1581 is preferably arranged as far as possible from the magnetism generation source included in the first housing 101 because an error occurs in the detection result due to the influence of magnetism other than geomagnetism.

FIG. 6 is a diagram illustrating an arrangement example of the geomagnetism detection unit 1581.
According to the example of FIG. 6, the microphone 163 is disposed at the end of the first casing 101 close to the microphone hole 109 (FIG. 2A), and the other end facing the end. Is provided with a speaker 164 for notification of incoming calls.
Speakers 161 and 162 are disposed at the end of the second casing 102 close to the speaker holes 106 and 107 (FIG. 2A), respectively. The speaker 161 is used for voice output of the telephone in the open state, and the speaker 162 is used for voice output of the telephone in the closed state.
Each of these microphones and speakers uses a magnet to perform conversion from sound to electric signal or from electric signal to sound, and the magnetism generated by this magnet causes a detection error of the geomagnetic detection unit 1581. obtain.

  Therefore, in the example of FIG. 6, the geomagnetism detection unit 1581 is disposed in a central region of the first housing 101 that is separated from the end portion where the microphone 163 is disposed and the end portion where the speaker 164 is disposed. The Thereby, the distance from the microphone 163 and the speaker 164 becomes long, and the influence of these magnetisms is eased. Further, in the closed state, the distance from the speakers 161 and 162 of the second housing 102 becomes longer, and the influence of these magnetisms is alleviated.

  The azimuth angle calculation unit 1582 calculates an azimuth angle on the ground plane according to the geomagnetic component S1 in each direction detected by the geomagnetism detection unit 1581 and the above-described tilt angle information S2 given from the control unit 159. .

FIG. 7 is a diagram for explaining a method of calculating the azimuth angle.
In FIG. 7, a rectangular coordinate system having coordinate axes Hx, Hy, Hz is a reference coordinate system set on the ground plane. That is, the coordinate axes Hx and Hy are coordinate axes parallel to the ground plane, and each face a predetermined direction. The coordinate axis Hz is a coordinate axis that faces in a direction perpendicular to the ground plane.
The azimuth angle θ is an angle formed by an image Zxy obtained by orthogonally projecting a vector in the reference direction Z onto the ground plane and the coordinate axis Hx. The inclination angle φ is an angle formed by the image Zxy and a vector in the reference direction Z. The twist angle η is an angle obtained by rotating the mobile phone 10 with the vector in the reference direction Z as the rotation axis.
When the azimuth angle θ, the tilt angle φ, and the twist angle η are all zero, the geomagnetic detection coordinate system set in the first housing 101 matches the coordinate system of the coordinate axes Hx, Hy, and Hz shown in FIG. To do.

  Here, if the detected value of geomagnetism corresponding to the coordinate axis Hx is α, the detected value of geomagnetism corresponding to the coordinate axis Hy is β, and the detected value of geomagnetism corresponding to the coordinate axis Hz is γ, the tangent of the azimuth angle θ shown in FIG. tan θ is expressed by the following equation.

[Equation 1]
tan θ = β / (γ · sinφ−α · cosφ) (1)

However, in the formula (1), the twist angle η is zero.
The azimuth angle calculation unit 1582 calculates the azimuth angle from the detected values of the triaxial geomagnetism using, for example, the relationship shown in the equation (1).
The above is the description of the direction detection unit 158.

Returning to the description of FIG.
The control unit 159 includes a computer that executes processing based on a program stored in the storage unit 152, and performs various processes related to the overall operation of the mobile phone 10.
For example, as processing related to the function of the telephone, processing for controlling a calling / incoming sequence of the communication processing unit 150 according to a key input operation in the key input unit 154, and voice data input / output in the voice processing unit 156 The communication processing unit 150 performs transmission / reception.
As processing related to the imaging function, processing for causing the imaging unit 157 to perform imaging processing of a still image or a moving image in response to a key input operation in the key input unit 154, or compression encoding into image data generated by the imaging processing The image processing such as the above is performed and stored in the storage unit 152. At the time of shooting a still image, a process of turning on the flash lamp 126 at an appropriate timing is also performed.

  In addition, the control unit 159 performs processing related to the navigation function, such as processing for acquiring geographical position and map information from the server device 40, or on the display screen 104 of the display unit 155 according to the detection result of the direction detection unit 158. A process for controlling the orientation of the map at, and a process for rotating the image on the display screen 104 according to the determination result of the open / close determination unit 153.

FIG. 8 is a block diagram illustrating an example of a functional configuration of a part program related to display control during navigation.
The program illustrated in FIG. 8 includes a map information acquisition unit 1591, a symbol image generation unit 1592, a first display control unit 1593, and a second display control unit 1594.
The first display control unit 1593 is an embodiment of the first display control means.
The second display control unit 1594 is an embodiment of the first display control means.

  The map information acquisition unit 1591 executes a process for acquiring the geographical position and map information from the server device 40. That is, the GPS receiving unit 151 receives a signal of the GPS satellite 20 and transmits information related to the received signal from the communication processing unit 150 to the server device 40, thereby returning the geographical position returned from the server device 40. Get map information.

  The symbol image generation unit 1592 generates information related to images of symbols (such as map symbols) such as characters, marks, and symbols to be displayed on the display screen 104 together with the map.

  The first display control unit 1593 controls the orientation of the map on the display screen 104 of the display unit 155 according to the detection result of the azimuth detection unit 158.

FIG. 9 is a diagram illustrating an example of the relationship between the reference direction Z for azimuth detection and the reference direction A on the display screen 104. In the example of FIG. 9, the reference direction Z for azimuth detection is set in a direction from the short side farther from the connecting portion in the first casing 101 toward the shorter side closer to the connecting portion. Further, the reference direction A on the display screen 104 is set in a direction from the short side closer to the connecting portion of the second housing 102 toward the short side farther from the connecting portion.
For example, when the reference direction Z for the direction detection and the reference direction A for the display screen are set as described above, the first display control unit 1593 displays the direction of the reference direction Z detected by the direction detection unit 158 and the display screen. The orientation of the map on the display screen 104 is controlled so that the orientation of the map in the reference direction A of 104 becomes equal.

  In addition to the map described above, the first display control unit 1592 displays a mark indicating the geographical position of the current location acquired by the map information acquisition unit 1591 on the map, and displays the direction A on the display screen 104. The symbol image of the symbol image generation unit 1592 is displayed in the upward direction.

The second display control unit 1594 performs predetermined rotation processing on the display image of the control result in the first display control unit 1593 in accordance with the determination result S4 of the open / close determination unit 153.
That is, when the open / close determination unit 153 determines the open state, the display image of the control result in the first display control unit 1593 is displayed on the display screen 104 as it is. When the open / close determination unit 153 determines the closed state, the display image of the control result in the first display control unit 1593 is rotated by 180 ° and displayed on the display screen 104.

  Next, the operation of the mobile phone 10 having the above-described configuration will be described focusing on the navigation function.

FIG. 10 is a flowchart illustrating a flow of processing related to acquisition of position information and map information in the map information acquisition unit 1591.
Steps ST101 to ST103 indicate processing of the map information acquisition unit 1591, and steps ST201 to ST203 indicate processing of the server device 40.

  First, the map information acquisition unit 1591 causes the GPS reception unit 151 to receive a signal from the GPS satellite 20, and acquires information related to the received signal (step ST101). Next, the acquired information is transmitted from the communication processing unit 150 to the server device 40 (step ST102).

Information transmitted from the communication processing unit 150 is received by the base station 30 and transmitted to the server device 40 via the communication network.
Server device 40 receives this information as a processing request from mobile phone 10 (step ST201), and calculates the geographical position of mobile phone 10 based on the received information. Further, based on the calculated position, the map information around the mobile phone 10 is searched from the database (step ST202). Then, the calculated position information and searched map information are returned from the communication network to the mobile phone 10 via the base station 30 as a processing result in response to the processing request (step ST203).

  The map information acquisition unit 1591 waits for a reply from the server device 40 that responds to the information transmitted in step ST101. When the communication processing unit 150 receives this reply, the map information acquisition unit 1591 acquires position information and map information included therein. (Step ST103).

  FIG. 11 is a flowchart illustrating the flow of processing in the first display control unit 1593 and the second display control unit 1594.

  The first display control unit 1593 includes map information and position information acquired by the map information acquisition unit 1591, information on the symbol image generated by the symbol image generation unit 1592, and the direction detected by the direction detection unit 158. Image data to be displayed on the display screen 104 of the display unit 155 is generated according to the information S3 (step ST301).

  That is, the first display control unit 1593 has the orientation on the display screen 104 such that the orientation of the reference direction Z detected by the orientation detection unit 158 and the orientation of the map in the reference direction A of the display screen 104 are equal. Image data for displaying on the display screen 104 a controlled map, a mark indicating the position of the current location on the map, and a symbol image such as a character arranged with the reference direction A as the upper direction of the display screen 104 Generate.

Next, the second display control unit 1594 determines whether the operating state of the movable mechanism 103 is an open state or a closed state in the determination result S4 of the open / close determination unit 153 (step ST302).
In the open state, the image data generated in the first display control unit 1593 is output to the display unit 155 to display the image on the display screen 104 (step ST304). In the closed state, the image data generated in the first display control unit 1593 is converted so that the display image in the open state rotates 180 ° on the display screen 104 (step ST303) and output to the display unit 155. (Step ST304).
Thereafter, it is determined whether to end or continue the processing mode for displaying the navigation map described above (step ST305), and when the instruction to continue is issued, the processing of steps ST301 to ST304 is repeated.

As described above, according to the present embodiment, the reference direction of the azimuth detection in the azimuth detection unit 158 is the first casing 101 and the second casing 102 connected via the movable mechanism 103. It is set on the first casing 101, not the second casing 102 in which the display unit 104 is held. When the positional relationship between the first housing 101 and the second housing 102 changes due to the change of the operation style and the direction of the display screen 104 with respect to the user changes, the movable mechanism 103 determined by the open / close determination unit 153. Depending on the operating state (open state or closed state), a predetermined rotation process is performed on the display image, and the image on the display screen 104 is controlled to face in an appropriate direction according to the operation style.
That is, even if the direction of the display screen 104 changes due to a change in the operation style, the direction detection result does not change in conjunction with this change. Therefore, the image to be displayed on the display screen 104 only needs to be rotated in consideration of only the change in the direction of the display screen 104 due to the change of the operation style, and it is not necessary to consider the direction detection result. It is possible to suppress the complexity of processing related to control.

  Further, the program of the second display control unit 1594 that performs the rotation process on the display image according to the operating state of the movable mechanism has the same two-case structure as the present embodiment and does not have a map navigation function. It is possible to easily divert display control programs for other electronic devices. Thereby, the burden of design work can be reduced and the occurrence of software bugs can be reduced.

Further, according to the present embodiment, the angle formed between the surface of the first housing 101 having the display screen 104 and the surface of the second housing 102 having the operation keys 110 depends on the operating state of the movable mechanism 103. As a result, the angle formed between the reference direction of the azimuth detection set on the first casing 101 and the display screen 104 changes. For this reason, when the user tries to keep the direction of the line of sight with respect to the display screen 104 constant, the inclination angle formed by the reference direction of the direction detection and the ground plane changes according to the operating state of the movable mechanism 103. Therefore, information on the inclination angle according to the operating state of the movable mechanism 103 determined by the open / close determination unit 153 is acquired from, for example, a data table stored in advance in the storage unit 152 or the like, and the direction in the direction detection unit 158 Used for detection.
Therefore, even if the structure is such that the angle formed between the reference direction of the azimuth detection set on the first housing 101 and the display screen 104 changes according to the operation style, the azimuth detection reference direction and the ground plane It is possible to detect an orientation with high accuracy in consideration of the inclination angle formed by

In addition, magnetizing sources such as a microphone 163 and a speaker 164 are arranged at opposite ends of the first casing 101. The magnetic detection unit 1581 is an area having a magnetic field intensity capable of detecting geomagnetism even in the magnetic field formation area by the magnetic generation source, from these magnetic generation sources arranged at the end of the first casing 101. It is arranged in a region near the center of the separated first casing 101.
Therefore, the influence of magnetism from these magnetism generation sources on the magnetism detection unit 1581 is mitigated, and normal detection of geomagnetism becomes possible.

  The present invention is not limited to the above-described embodiment, and various modifications can be made.

For example, in the above-described embodiment, as the information on the tilt angle, the tilt angle data set in advance corresponding to the operating state of the movable mechanism 103 is used for the calculation of the azimuth angle. For example, as shown in FIG. In addition, an inclination angle detection unit 1583 (corresponding to an angle detection unit) that detects an inclination angle based on the direction of gravitational acceleration or the like may be provided, and the result may be used to detect an azimuth angle. That is, the azimuth calculation unit 1582 may be configured to calculate the azimuth according to the geomagnetism detected by the geomagnetism detection unit 1581 and the tilt angle detected by the tilt angle detection unit 1583.
Thereby, since an accurate inclination angle is obtained, it is possible to improve the direction detection accuracy. If the two-dimensional tilt angle is detected by the tilt angle detection unit 1583, the twist angle information in addition to the tilt angle can be used for the calculation of the azimuth angle. It becomes possible to do.

  In the embodiment described above, an orthogonal coordinate system is used as a reference coordinate system for geomagnetism detection. However, the present invention is not limited to this. For example, even if a coordinate system in which coordinate axes are oblique is used as the reference coordinate system, azimuth calculation is performed. Is possible.

In the above-described embodiment, an example in which the processing of the control unit 159 is processed by a computer based on a program has been described. However, at least a part of these processing can be executed by hardware without using a computer. It is.
Conversely, at least a part of processing in other units other than the control unit 159 may be executed by the computer of the control unit 159. For example, the processing of the azimuth calculation unit 1582 in the azimuth detection unit 158 may be executed by a computer of the control unit 159.

  DESCRIPTION OF SYMBOLS 10 ... Mobile phone, 20 ... GPS satellite, 30 ... Base station, 40 ... Server apparatus, 102 ... 1st housing | casing, 102 ... 2nd housing | casing, 103. ..Moveable mechanism, 104 ... display screen, 105,125 ... camera lens, 106,107 ... hole for speaker, 109 ... hole for microphone, 110,120 ... operation keys, 126: Flash lamp, 150: Communication processing unit, 151 ... GPS reception unit, 152 ... Storage unit, 153 ... Open / close determination unit, 154 ... Key input unit, 155 ... Display unit, 156... Audio processing unit, 157... Imaging unit, 158 .. Direction detection unit, 159... Control unit, 161, 162, 164. ... Geomagnetic detector, 1582 ... Azimuth calculation , 1583 ... tilt angle detecting unit, 1591 ... map information acquiring unit, 1592 ... symbol image generating unit, 1593 first display control unit ..., 1594 ... second display control unit

Claims (3)

An information display device for displaying direction information using a map,
A first housing in which a first direction is set;
Detecting means for detecting a geographical orientation of the first direction;
Display means for displaying a display image including the map on a display screen ;
A second casing connected to the first casing and provided with the display means;
In each of the display screens before and after the orientation of the symbol image on the map is changed , the map orientation is set so that the map orientation of the map is equal to the geographical orientation detected by the detection means. Control means for controlling;
An information display device comprising: The control means includes
First control means for controlling the orientation of the map in the display image so that the detected geographical orientation in the first direction is equal to the map orientation of the map in the orientation that is above the symbol image ;
Second control means for rotating a display image including the map whose direction is controlled by the first control means,
The information display device according to claim 1. A movable mechanism that connects the first housing and the second housing such that the display device can be moved between a first state where the display device is visible and a second state where the display device is not visible;
Determination means for determining the first state and the second state and outputting a determination result to the control means in order to control the direction of the map ;
The information display device according to claim 1 or 2.

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