JP2013128180A - Portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disperse information on a disaster to surrounding users in the event of the occurrence of the disaster.SOLUTION: A portable terminal 1 comprises: emergency information acquisition means (an emergency time detection unit 133) for acquiring emergency information; a display control unit which controls the display of a display unit capable of changing the angle of view into the state of a narrow angle of view or a wide angle of view; and an angle of view control unit 123 which controls the angle of view of the display unit. The angle of view control unit 123 changes the narrow angle of view to the wide angle of view if the emergency information acquisition means acquires emergency information. The display control unit displays on the display unit the emergency information acquired by the emergency information acquisition means.

Description

  The present invention relates to a portable terminal that controls the viewing angle of a display device.

  A technology that considers the safety of the user when a disaster occurs is known. For example, Patent Document 1 describes a head-mounted display that secures a user's field of view when a disaster occurs. This head mounted display is mounted on the user's head, detects the posture variation of the image projection surface of the light guide member that changes in conjunction with the head, and the detected posture variation is an acceleration of a certain value or more By stopping the display control operation, it is possible to secure the user's field of view when a disaster occurs.

  Patent Document 2 describes an information presentation device that changes a display layout according to the distance between a display screen and a user in accordance with reception of emergency information.

JP 2011-059435 A (published March 24, 2011) JP 2008-225364 A (published September 25, 2008)

  However, the above-described conventional technology considers the safety of the user of the display or device as described above, and does not consider other people. In particular, the received emergency information is preferably displayed so that many people can easily read the contents of the disaster.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a mobile terminal capable of diffusing emergency information to others around the user in the event of a disaster. is there.

  In order to solve the above-described problems, the mobile terminal of the present invention includes an emergency information acquisition unit that acquires emergency information, and a display device that can change the viewing angle to either a narrow viewing angle or a wide viewing angle. Display control means for controlling the viewing angle, and viewing angle control means for controlling the viewing angle of the display device, the viewing angle control means from the narrow viewing angle when the emergency information is acquired by the emergency information acquisition means The display control unit displays the emergency information acquired by the emergency information acquisition unit on the display device.

  According to said structure, if emergency information is acquired, it will change from a narrow viewing angle to a wide viewing angle, and the acquired emergency information will be displayed on a display apparatus. For this reason, in an emergency, emergency information is displayed on the display device with a wide viewing angle, so that others around the user can look into the emergency information displayed on the display device from an oblique direction. Thereby, the possibility that others around the user know the emergency information can be increased. Therefore, it is possible to provide a mobile terminal capable of diffusing emergency information to others around the user.

  In the mobile terminal of the present invention, when the emergency information acquisition unit receives cell broadcast information, the emergency information acquisition unit acquires the information as the emergency information.

  According to said structure, since emergency information is simultaneously delivered with respect to several portable terminals including a user's portable terminal, emergency information can be spread further to circumference | surroundings.

  The portable terminal of the present invention further includes a position information acquisition unit that acquires position information indicating a current position, and the emergency information acquisition unit acquires distribution information from a server that provides various types of information via a network, When the distribution information includes character information indicating an emergency, the distribution information is specified as a first emergency information candidate, and the position information acquisition means is included in the target area indicated by the distribution information specified as the first emergency information candidate. When the current position indicated by the position information acquired by the above is included, the first emergency information candidate is acquired as the emergency information.

  According to the above configuration, when distribution information is acquired from a server that provides various types of information via a network, and the distribution information includes character information indicating an emergency, the distribution information is identified as a first emergency information candidate, When the current location indicated by the position information is included in the target area indicated by the distribution information identified as one emergency information candidate, the first emergency information candidate is acquired as emergency information. For this reason, it can notify that it is urgent with respect to the user located in an object area, and the circumference | surroundings of the user.

  The mobile terminal of the present invention further includes base station information acquisition means for acquiring base station information indicating the position of the base station, and the emergency information acquisition means includes an emergency warning signal in the broadcast radio wave transmitted by the base station. The broadcast information included in the broadcast radio wave together with the emergency alert signal is specified as a second emergency information candidate, and the base station information acquisition means is provided in the target area indicated by the broadcast information specified as the second emergency information candidate. If the position of the base station indicated by the base station information acquired by the above is included, the second emergency information candidate is acquired as the emergency information.

  According to said structure, when the emergency alert signal is contained in the broadcast radio wave which a base station transmits, the broadcast information contained in a broadcast radio wave with an emergency alert signal is specified as a 2nd emergency information candidate, When the location of the base station indicated by the base station information is included in the target area indicated by the specified broadcast information, the second emergency information candidate is acquired as emergency information. For this reason, even if it is not provided with the GPS sensor etc. which acquire a present position, it can notify that it is urgent with respect to the user located in an object area, and the circumference of the user.

  In the portable terminal of the present invention, the display device is a liquid crystal display, and the viewing angle control means controls a viewing angle of the display device by adjusting a voltage applied to a liquid crystal layer of the display device. To do.

  Further, in the mobile terminal of the present invention, the display control unit generates display data indicating either a wide viewing angle or a narrow viewing angle in response to an instruction from the viewing angle control unit. Display on the display device based on the display data.

  Further, in the portable terminal of the present invention, the viewing angle control means changes from a wide viewing angle to a narrow viewing angle after a predetermined time elapses when the viewing angle is changed from a narrow viewing angle to a wide viewing angle. To do.

  According to said structure, it can return to a narrow viewing angle, without requiring a user's operation.

  In the portable terminal of the present invention, when the viewing angle control unit changes from the narrow viewing angle to the wide viewing angle, the viewing angle control unit changes the wide viewing angle to the narrow viewing angle in response to an instruction to end the display of emergency information.

  According to said structure, it can return to a narrow viewing angle at a desired timing.

  The present invention has an effect that information on disaster can be diffused to surrounding users when a disaster occurs.

It is a block diagram which shows an example of the hardware constitutions of the portable terminal in embodiment of this invention. It is a functional block diagram which shows an example of the function of the control part with which a portable terminal is provided with the data which a data memory memorize | stores. It is a figure which shows an example of a mode that a viewing angle changes. It is a flowchart which shows an example of the flow of a viewing angle switching process. It is a functional block diagram which shows an example of the function of the control part with which the portable terminal in 2nd Embodiment is provided with the data which a data memory stores. It is a flowchart which shows an example of the flow of the viewing angle switching process in 2nd Embodiment. It is a functional block diagram which shows an example of the function of the control part with which the portable terminal in 3rd Embodiment is provided with a data memory. It is a flowchart which shows an example of the flow of the viewing angle switching process in 3rd Embodiment.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First Embodiment>
(Configuration of mobile device)
FIG. 1 is a block diagram showing an example of a hardware configuration of a mobile terminal according to the embodiment of the present invention. As shown in FIG. 1, the mobile terminal 1 includes a control unit 101 for controlling the entire mobile terminal 1, a program memory 10 for storing a program executed by the control unit 101, a data memory 20, and the like. An operation unit 30 that accepts user operations, a communication unit 40, a tuner 50, a display control unit (display control means) 60 for controlling display on the display unit 61, an AV decoder 70, and a GPS reception unit 80 Including.

  The GPS receiving unit 80 receives a GPS signal transmitted from a GPS (Global Positioning System) satellite, and outputs the received GPS signal to the control unit 101.

  The operation unit 30 includes, for example, operation keys and a touch panel. The operation keys and the touch panel accept input of an operation by the user and output the accepted operation to the control unit 101.

  The communication unit 40 is connected to an antenna 41 and can perform data communication with a radio base station. Specifically, the communication unit 40 receives unicast, multicast, or broadcast (cell broadcast) data from the radio base station. In particular, the communication unit 40 can communicate with an electronic mail server connected to the radio base station via the radio base station. The communication unit 40 receives an email transmitted from the email server and outputs the email to the control unit 101. In addition, the communication unit 40 transmits an email input from the control unit 101 to the email server. For this reason, the control unit 101 stores the e-mail transmitted / received to / from the e-mail server in the data memory 20.

  The tuner 50 is connected to an antenna 51 and receives a broadcast signal received by the antenna 51. The broadcast signal is a high frequency digital modulation signal including video data and audio data. The tuner 50 extracts a signal having a specific frequency from the high frequency digital modulation signal input from the antenna. The tuner 50 also includes a deinterleave circuit and an error correction circuit. The tuner 50 demodulates the extracted high-frequency digital modulation signal having a specific frequency and outputs code data to the AV decoder 70.

  The AV decoder 70 includes a video decoder and an audio decoder, decodes the encoded data input from the tuner 50 to generate a video signal and an audio signal, outputs the video signal to the display control unit 60, and outputs the audio signal. Is D / A (digital / analog) converted and applied to the speaker 71.

  Although an example of receiving and playing back a digital television broadcast wave is shown here, an analog television broadcast wave may be received and played back. Further, instead of the television broadcast or in addition to the television broadcast, the broadcast radio wave of the radio broadcast may be received and reproduced.

  The display control unit 60 is controlled by the control unit 101 and controls the display unit 61 according to an instruction input from the control unit 101 to cause the display unit 61 to display an image. The display unit 61 is a display device (liquid crystal display device) with a viewing angle control function, and an image displayed on the display unit 61 includes a moving image and a still image.

  The viewing angle is controlled by tilting the liquid crystal molecules in the liquid crystal layer provided in the liquid crystal panel according to the magnitude of the voltage applied to the liquid crystal panel included in the display unit 61. Note that since the control of the viewing angle is a known technique, detailed description thereof will not be repeated here.

(Function 1 of the control unit)
FIG. 2 is a functional block diagram illustrating an example of functions of the control unit included in the mobile terminal together with data stored in the data memory. As shown in FIG. 2, the control unit 101 includes a cell broadcasting information receiving unit (emergency information acquisition unit) 121, an emergency detection unit (emergency information acquisition unit) 133, and a viewing angle control unit (viewing angle control unit). ) 123.

  The cell broadcasting information receiving unit 121 receives the cell broadcasting information broadcast from the radio base station via the communication unit 40, and stores the received cell broadcasting information 21 in the data memory 20. Here, the cell broadcasting information 21 includes emergency information.

  The emergency information indicates, for example, the type of disaster that occurred, the location of the disaster, the time of occurrence, the target area that is subject to damage (evacuation) due to the occurrence of the disaster, and a ringing command and a pop-up display requesting ringing of the notification Contains the requested display command.

  The emergency detection unit 133 detects an emergency based on the cell broadcasting information broadcast by the radio base station. An emergency is detected by including a display command in the cell broadcasting information broadcast by the radio base station. When the emergency detection unit 133 detects an emergency, the emergency detection unit 133 outputs a wide viewing angle change instruction for changing the viewing angle of the display unit 61 to a wide viewing angle to the viewing angle control unit 123, and also displays emergency information on the display control unit 60. Instruct the display. In response to the instruction, the display control unit 60 displays emergency information on the display unit 61 (pop-up display).

  The viewing angle control unit 123 controls the viewing angle of the display unit 61. Specifically, when receiving a wide viewing angle change instruction from the emergency detection unit 133, the viewing angle control unit 123 generates viewing angle control information 23 indicating the current viewing angle state and stores it in the data memory 20. To do.

  The viewing angle control information 23 stored in the data memory 20 indicates either a wide viewing angle state or a narrow viewing angle state.

  The wide viewing angle may be a viewing angle that allows the information displayed on the display unit 61 to be determined from an oblique direction, and is, for example, 100 degrees or more (the upper limit is 180 degrees). The narrow viewing angle may be a viewing angle that allows the information displayed on the display unit 61 to be determined from the substantially front direction, and is, for example, less than 100 degrees (the lower limit is 0 degrees).

  Further, when receiving the wide viewing angle change instruction from the emergency detection unit 133, the viewing angle control unit 123 determines whether to change the viewing angle. When the generated viewing angle control information 23 indicates a narrow viewing angle state, the viewing angle control unit 123 changes the viewing angle from the narrow viewing angle to the wide viewing angle, but the generated viewing angle control information 23 is wide. When the viewing angle state is indicated, the wide viewing angle state is maintained (updated).

  Further, when the display unit 61 is changed or maintained (updated) to a wide viewing angle, the viewing angle control unit 123 indicates the viewing angle control information 23 stored in the data memory 20 when a predetermined condition is satisfied. Return to the viewing angle. Thereby, when the viewing angle control information 23 indicates a wide viewing angle state, the viewing angle is not changed, and when the viewing angle control information 23 indicates a narrow viewing angle state, the wide viewing angle is changed to the narrow viewing angle. The Further, when the viewing angle control unit 123 returns the viewing angle state to the original state, the viewing angle control information 23 stored in the data memory 20 is deleted.

  The predetermined condition is that when the predetermined time T1 has elapsed from the time when the viewing angle control unit 123 changes to the wide viewing angle, or the display of emergency information input by the user to the operation unit 30 is terminated. This is when an instruction is detected.

  As described above, when the viewing angle control information 23 indicates a narrow viewing angle state, the viewing angle control unit 123 receives a wide viewing angle change instruction from the emergency detection unit 133 and changes from a narrow viewing angle to a wide viewing angle. When the predetermined time T1 has elapsed since the change, the angle is automatically changed to the narrow viewing angle. Therefore, the viewing angle can be returned from the wide viewing angle to the narrow viewing angle without the user operating the operation operation 30. Also, when the end of emergency information display is instructed, the viewing angle is returned from the wide viewing angle to the narrow viewing angle, and the screen before the emergency information is displayed is displayed, so information other than emergency information is displayed in a wide viewing angle. It is possible to avoid problems such as being

(Specific example of viewing angle control)
FIG. 3 is a diagram illustrating an example of how the viewing angle changes. 3A and 3C show a state where the screen of the display unit has a narrow viewing angle. FIG. 3B shows a state where the screen of the display unit has a wide viewing angle.

  As shown in FIG. 3A, before the emergency information is detected, the display unit 61 is set to a narrow viewing angle. At this time, the screen displayed on the display unit 61 includes, for example, the user of the portable terminal 1 and information related to the user. Therefore, before the emergency information is detected, the display unit 61 is in a narrow viewing angle state, so that peeping from the surroundings can be prevented.

  For example, when a disaster occurs, the radio base station broadcasts cell broadcasting information to an unspecified number of mobile terminals. The mobile terminal 1 identifies cell broadcasting information received by cell broadcast as emergency information, changes the viewing angle of the display unit 61 from a narrow viewing angle to a wide viewing angle, and displays the emergency information on the display unit 61. (See FIG. 3B). Thereby, people around the user can peek at the emergency information displayed on the display unit 61 from the oblique direction on the display unit 61 of the mobile terminal 1. Therefore, it is possible to increase the possibility that humans around the user can know emergency information.

  In addition, while the display unit 61 displays the emergency information, the close button 91 is displayed on the screen. The close button 91 is a button for instructing the end of display of emergency information. When the user presses the close button 91, the screen displayed before the emergency information is detected is returned.

  If the user does not press the close button 91, when the predetermined time T1 has elapsed since the narrow viewing angle was changed to the wide viewing angle, the screen displayed before the emergency information was detected is returned (FIG. (C)). )reference). Thereby, the user does not need an extra operation for returning to the screen displayed immediately before the emergency information.

(View angle control flow 1)
FIG. 4 is a flowchart showing an example of the flow of the viewing angle switching process. The viewing angle switching process is a process executed by the control unit 101 when the control unit 101 executes the viewing angle control program 13 stored in the program memory 10. As shown in FIG. 4, the cell broadcasting information receiving unit 121 determines whether or not the cell broadcasting information that the radio base station broadcasts is received. If cell broadcasting information is received, the process proceeds to step S02.

  In step S02, the emergency detection unit 133 determines whether an emergency has been detected based on the cell broadcasting information received in step S01. Specifically, it is determined whether or not a display command is included in the cell broadcasting information. If the display command is included in the cell broadcasting information, it is determined as an emergency, and the process proceeds to step S03. If not, the process is returned to step S01 without being determined as an emergency.

  In step S03, the viewing angle control unit 123 generates the viewing angle control information 23 with the viewing angle state when the cell broadcasting information is received in step S01 as the current viewing angle state, and stores the viewing angle control information 23 in the data memory 20. Store and proceed to step S04.

  In any of steps S01 to S03, the control unit 101 executes the emergency information display program 11 stored in the program memory 10 in parallel with the execution of the viewing angle control program 13, thereby displaying the display control unit. 60 displays emergency information on the display unit 61.

  In step S04, the viewing angle control unit 123 determines whether or not the current viewing angle is in a narrow viewing angle state. Specifically, it is determined whether or not the viewing angle state when the cell broadcasting information is received in step S01 is a narrow viewing angle state. If the viewing angle at the time of receiving the cell broadcasting information is a narrow viewing angle, the process proceeds to step 05; otherwise, the process proceeds to step S06.

  In step S05, the viewing angle control unit 123 changes the viewing angle from the narrow viewing angle to the wide viewing angle, and the process proceeds to step S06.

  In step S06, the viewing angle control unit 123 sets the timer T to 0. Then, the viewing angle control unit 123 determines whether or not there has been an instruction to end display of emergency information (step S07). If there is an instruction to end display of emergency information, the process proceeds to step S09. If not, the process proceeds to step S08.

  In step S08, it is determined whether or not the timer T has passed a predetermined time T1. If timer T has passed a predetermined time T1, the process proceeds to step S09. If not, the process returns to step S07.

  When there is an instruction to end display of emergency information in step S07, or when the timer T has elapsed time T1 in step S08, the control unit 101 ends display control by ending the execution of the emergency information display program. The unit 60 displays a screen before displaying emergency information.

  In step S09, the viewing angle control unit 123 returns the viewing angle to the original state. Specifically, when the viewing angle control information 23 stored in the data memory 20 in step S03 indicates a narrow viewing angle state, the viewing angle control information 23 is changed from the wide viewing angle to the narrow viewing angle. When a corner state is indicated, the state is maintained.

  In the next step S10, the viewing angle control unit 123 deletes the viewing angle control information 23 stored in the data memory 20 in step S03, and ends the viewing angle switching process.

<Second Embodiment>
The mobile terminal 1 in the first embodiment receives emergency information that has been cell broadcasted by a radio base station. In the second embodiment, the mobile terminal 1A acquires emergency information via the Internet.

(Function 2 of the control unit)
FIG. 5 is a functional block diagram illustrating an example of functions of the control unit included in the mobile terminal according to the second embodiment, together with data stored in the data memory. The control unit 101A included in the mobile terminal 1A according to the second embodiment is different from the control unit 101 included in the mobile terminal 1 according to the first embodiment in that the emergency detection unit 133 is changed to the emergency detection unit 133A. The location information acquisition unit 135 is added, and the distribution information acquisition unit 131 is added in place of the cell broadcasting information reception unit 121. Since other configurations are the same as those of control unit 101, detailed description will not be repeated.

  The distribution information acquisition unit (emergency information acquisition means) 131 acquires the distribution information provided by the distribution site, stores the acquired distribution information 25 in the data memory 20, and outputs it to the emergency detection unit 133A. As a method for acquiring the distribution information, the distribution information may be received by e-mail from the registered distribution site, or may be acquired by accessing a Web page provided by the registered distribution site. When acquiring from a Web page, the notification of the update of a Web page is received by RSS from a delivery site. As a result, the user can notice that the Web page has been updated. The distribution site may be any site that distributes weather alerts.

  The position information acquisition unit (position information acquisition means) 135 controls the GPS reception unit 80, determines the current position based on the GPS signal received by the GPS reception unit 80, and position information 27 indicating the determined current position. Is stored in the data memory 20. The position information acquisition unit 135 may calculate the position directly from the received GPS signal, or transmits the received GPS signal to a server included in the communication carrier of the mobile terminal 1A, and obtains the position information from the server. You may make it receive.

  The emergency detection unit (emergency information acquisition unit) 133A detects an emergency such as a disaster based on the distribution information acquired by the distribution information acquisition unit 131 and the position information acquired by the position information acquisition unit 135. 133 A of emergency detection parts specify delivery information as emergency information, when the text information which shows emergency is contained in the delivery information input from the delivery information acquisition part 131. FIG.

  The character information indicating emergency is a character string such as “disaster”, “earthquake”, “tsunami”, “emergency”, “evacuation”, and the like. The emergency detection unit 133 determines whether or not the target area included in the distribution information identified as emergency information includes the position indicated by the position information 27 stored in the data memory 20. If the target area included in the distribution information includes the position indicated by the position information 27, it is detected as an emergency, but otherwise it is not detected as an emergency. When detecting an emergency, the emergency detection unit 133A outputs a wide viewing angle change instruction to the viewing angle control unit 123 and instructs the display control unit 60 to display emergency information. In response to the instruction, the display control unit 60 displays the distribution information specified as emergency information on the display unit 61. As a result, when the user is located in the target area, the emergency information is displayed with a wide viewing angle. Therefore, it is possible to increase the possibility that people around the user who are located in the target area browse the emergency information. . Therefore, it is possible to prompt people in the target area to evacuate quickly.

(Viewing angle control flow 2)
FIG. 6 is a flowchart showing an example of the flow of the viewing angle switching process in the second embodiment. The viewing angle switching process shown in FIG. 6 is different from the viewing angle switching process in the first embodiment in that steps S01 and S02 are changed to steps S01A and S02A, and step S11 is added. Since the other processes are the same as the viewing angle switching process shown in FIG. 4, the description will not be repeated.

  In step S01A, the distribution information acquisition unit 131 determines whether distribution information has been acquired via the Internet. The distribution information may be acquired by receiving an e-mail transmitted from the distribution site, or may be acquired on a Web page provided by the distribution site. If the distribution information is acquired, the process proceeds to step S11.

  In step S11, the emergency detection unit 133A determines whether or not the distribution information acquired in step S01A indicates emergency information. Specifically, it is determined whether or not the distribution information includes character information indicating emergency. If the distribution information includes character information indicating emergency, it is identified as emergency information, and the process proceeds to step S02A. If not, the process returns to step S01A.

  In step S02A, emergency detection unit 133A determines whether or not an emergency has been detected. Specifically, it is determined whether or not the target area included in the distribution information identified as emergency information in step S <b> 11 includes the position indicated by the position information output from the GPS receiver 80. If the target area includes the position indicated by the position information output by the GPS receiver 80, an emergency is detected and the process proceeds to step S03. If not, the process returns to step S01A.

<Third Embodiment>
The mobile terminal 1 </ b> B in the third embodiment acquires emergency information based on the broadcast radio wave received by the tuner 50.

(Function 3 of the control unit)
FIG. 7 is a functional block diagram illustrating an example of functions of a control unit included in the mobile terminal according to the third embodiment together with a data memory. The control unit 101B shown in FIG. 7 is different from the control unit 101 shown in FIG. 2 in that the emergency detection unit 133 is changed to the emergency detection unit 133B, the base station information acquisition unit 143 is added, and A broadcast information receiving unit 141 is added in place of the cell broadcasting information receiving unit 121. Since the other configuration of control unit 101B is the same as the configuration shown in FIG. 2, the description thereof will not be repeated.

  The broadcast information receiving unit (emergency information acquisition means) 141 controls the tuner 50 that receives broadcast radio waves, and receives broadcast information included in the broadcast radio waves received by the tuner 50. When a disaster occurs, the radio base station transmits broadcast radio waves including emergency information together with an emergency warning signal (EWS). Therefore, when a disaster occurs, the broadcast information receiving unit 141 identifies the received broadcast information as emergency information and outputs it to the emergency detection unit 133A when detecting an emergency warning signal included in the broadcast radio wave.

  The broadcast radio wave may be a television broadcast (analog system or digital system) or a radio broadcast. In addition, the broadcast information receiving unit 141 detects an emergency warning signal included in broadcast waves of television broadcasts and radio broadcasts. However, when the voice indicating emergency is recognized by voice, the broadcast information reception unit 141 converts the received broadcast information into emergency information. May be specified. The voice indicating the emergency may be a voice such as “disaster”, “earthquake”, “tsunami”, “emergency” or “evacuation”.

  The base station information acquisition unit (base station information acquisition unit) 143 acquires the base station information indicating the position of the radio base station via the communication unit 40 and stores the acquired base station information 29 in the data memory 20. Thereby, since the position of the radio base station closest to the current position can be acquired, the current position can be specified without providing the GPS receiver 80.

  The emergency detection unit (emergency information acquisition means) 133B detects an emergency such as a disaster based on the base station information acquired by the base station information acquisition unit 143 and the emergency information received by the broadcast information reception unit 141. To do. The emergency detection unit 133B detects an emergency when the target area included in the emergency information input from the broadcast information reception unit 141 includes the position indicated by the base station information stored in the data memory 20. When detecting an emergency, the emergency detection unit 133B outputs a wide viewing angle change instruction to the viewing angle control unit 123 and instructs the display control unit 60 to display emergency information. In response to the instruction, the display control unit 60 displays the broadcast information specified as emergency information on the display unit 61.

(Viewing angle control flow 3)
FIG. 8 is a flowchart showing an example of the flow of viewing angle switching processing in the third embodiment. The viewing angle switching process shown in FIG. 8 differs from the viewing angle switching process in the first embodiment in that steps S01 and S02 are changed to steps S01B and S02B, and step S11A is added. The other processes are the same as the viewing angle switching process shown in FIG.

  In step S01B, the broadcast information receiving unit 141 receives broadcast information included in the broadcast radio wave via the tuner 50 that receives the broadcast radio wave, and the process proceeds to step S02B.

  In step S11A, the broadcast information receiving unit 141 determines whether the broadcast information received in step S01B is emergency information. Specifically, it is determined whether or not an emergency warning signal is included in the broadcast radio wave received by the tuner 50. If an emergency warning signal is included in the broadcast radio wave received by tuner 50, the broadcast information received in step S01B is specified as emergency information, and the process proceeds to step S02B.

  In step S02B, the emergency detection unit 133B determines whether it is an emergency. Specifically, it is determined whether or not the target area included in the broadcast information identified as emergency information in step S11A includes the position indicated by the base station information acquired by the base station information acquisition unit 143. If the target area included in the broadcast information includes the position indicated by the base station information acquired by base station information acquisition section 143, the process proceeds to step S03. If not, the process returns to step S11A.

  In addition, although the portable terminals 1, 1 </ b> A, 1 </ b> B in the first to third embodiments are configured to include the display unit 61 with a viewing angle control function, the present invention is not limited to this configuration. Instead of the display unit 61, a display unit without a viewing angle control function may be provided. In this case, the control units 101, 101A, and 101B execute the viewing angle control program 13 stored in the data memory 20 to control the viewing angle by processing the display data, such as changing the density of the display data.

  As described above, the mobile terminal 1 of the present invention has emergency information acquisition means (emergency detection units 133, 133A, 133B, distribution information acquisition unit 131, broadcast information reception unit 141) for acquiring emergency information, and a viewing angle. A display control unit 60 that controls display of the display unit 61 that can be changed to either a narrow viewing angle or a wide viewing angle; and a viewing angle control unit 123 that controls the viewing angle of the display unit 61. When the emergency information is acquired by the emergency information acquisition unit, the control unit 123 changes the narrow viewing angle from the wide viewing angle, and the display control unit 60 displays the emergency information acquired by the emergency information acquisition unit on the display unit 60. indicate.

  For this reason, when the emergency information is acquired, the narrow viewing angle is changed to the wide viewing angle, and the acquired emergency information is displayed on the display unit 61. Thereby, in an emergency, emergency information is displayed on the display unit 61 in a wide viewing angle state, so that others around the user can look into the emergency information displayed on the display unit 61 from an oblique direction. Thereby, the possibility that others around the user know the emergency information can be increased. Therefore, emergency information can be spread to others around the user.

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

  Finally, each block of the portable terminal 1 (1A, 1B), in particular, the control unit 101 (101A, 101B) may be configured by hardware logic, or realized by software using a CPU as follows. Also good.

  That is, the mobile terminal 1 (1A, 1B) includes a CPU (central processing unit) that executes instructions of a control program that implements each function, a ROM (read only memory) that stores the program, and a RAM ( random access memory), a storage device (recording medium) such as a memory for storing the program and various data. The object of the present invention is to record the program code (execution format program, intermediate code program, source program) of the control program of the portable terminal 1 (1A, 1B), which is software that realizes the above-described functions, in a computer-readable manner. This can also be achieved by supplying the recording medium to the portable terminal 1 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

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

  Further, the mobile terminal 1 (1A, 1B) may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

1, 1A, 1B Mobile terminal 60 Display control unit (display control means)
61 Display unit 101, 101A, 101B Control unit 121 Cell broadcasting information receiving unit (emergency information acquisition means)
123 Viewing angle control unit (viewing angle control means)
131 Distribution information acquisition unit (emergency information acquisition means)
133, 133A, 133B Emergency detection unit (emergency information acquisition means)
135 Position information acquisition unit (position information acquisition means)
141 Broadcast information receiver (emergency information acquisition means)
143 Base station information acquisition unit (base station information acquisition means)

Claims (8)

Emergency information acquisition means for acquiring emergency information;
Display control means for controlling display of a display device capable of changing the viewing angle to either a narrow viewing angle or a wide viewing angle;
Viewing angle control means for controlling the viewing angle of the display device,
When the emergency information is acquired by the emergency information acquisition unit, the viewing angle control unit changes from a narrow viewing angle to a wide viewing angle,
The mobile terminal according to claim 1, wherein the display control means displays the emergency information acquired by the emergency information acquisition means on the display device.   The mobile terminal according to claim 1, wherein the emergency information acquisition unit acquires the information as the emergency information when cell broadcast information is received. It further comprises position information acquisition means for acquiring position information indicating the current position,
The emergency information acquisition means includes
When distribution information is acquired from a server that provides various types of information via a network, and the distribution information includes character information indicating an emergency, the distribution information is specified as a first emergency information candidate,
When the current location indicated by the location information acquired by the location information acquisition means is included in the target area indicated by the distribution information identified as the first emergency information candidate, the emergency information is designated as the first emergency information candidate. The mobile terminal according to claim 1, wherein the mobile terminal is acquired as: It further comprises base station information acquisition means for acquiring base station information indicating the position of the base station,
The emergency information acquisition means includes
When an emergency alert signal is included in the broadcast radio wave transmitted by the base station, the broadcast information included in the broadcast radio wave together with the emergency alert signal is specified as a second emergency information candidate,
When the target area indicated by the broadcast information identified as the second emergency information candidate includes the position of the base station indicated by the base station information acquired by the base station information acquisition means, the second emergency information candidate The mobile terminal according to claim 1, wherein the mobile terminal is acquired as the emergency information. The display device is a liquid crystal display,
5. The mobile phone according to claim 1, wherein the viewing angle control unit controls a viewing angle of the display device by adjusting a voltage applied to a liquid crystal layer of the display device. Terminal.   The display control unit generates display data indicating a state of either a wide viewing angle or a narrow viewing angle in response to an instruction from the viewing angle control unit, and generates display data on the display device based on the generated display data. The mobile terminal according to claim 1, wherein the mobile terminal is displayed.   The viewing angle control means, when the viewing angle is changed from a narrow viewing angle to a wide viewing angle, changes from a wide viewing angle to a narrow viewing angle after a predetermined time has elapsed since the change. The portable terminal in any one of 1-6. The viewing angle control means, when the viewing angle is changed from a narrow viewing angle to a wide viewing angle, changes from a wide viewing angle to a narrow viewing angle by an instruction to end display of emergency information. The portable terminal in any one of 1-7.

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