JP2013015649A - Viewing angle control device, display device, viewing angle control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption on performing viewing angle control in a display unit according to ambient environment.SOLUTION: A viewing angle control unit controls a viewing angle of a viewing angle variable display unit on the basis of location information acquired by a location information acquisition unit (GPS). However, when it is determined that a user uses public transportation for a predetermined action such as commuting on the basis of communication results of an RFID tag and communication history information of the RFID tag, the viewing angle control unit performs control to narrow the viewing angle, after stopping operation of the location information acquisition unit.

Description

  The present invention relates to a viewing angle control device, a display device, a viewing angle control method, and a program for controlling a viewing angle of, for example, a liquid crystal display device.

  Mobile terminal devices such as mobile phones are often used in public places such as trains and buses. At this time, there is a problem in that the privacy of the user is infringed because the content displayed on the screen is visible to others.

  In recent years, liquid crystal displays capable of controlling the viewing angle have been known. As an example, Patent Document 1 describes a technique for changing and controlling the viewing angle of a liquid crystal display by changing the orientation of liquid crystal molecules sealed between two glass plates.

  Against the background described above, a technique described in Patent Document 2 regarding viewing angle control of a display unit of a device is known. That is, a display unit capable of changing the viewing angle of the mobile phone device is provided, and a position / viewing angle correspondence table is stored. This position / viewing angle correspondence table has a structure in which position information and viewing angles are associated with each other. In addition, the mobile phone acquires position information by using the built-in GPS, and searches the viewing angle associated with the acquired position information from the position / viewing angle correspondence table. Then, the retrieved viewing angle is set in the display unit (see, for example, Patent Document 1). With such a configuration, the viewing angle of the display unit can be automatically changed according to the surrounding environment of the mobile phone.

JP 2004-62094 A JP 2007-33935 A

  However, in the configuration described in Patent Document 2, it is necessary to constantly execute an operation of acquiring own position information for viewing angle control in accordance with the surrounding environment. It is necessary to always operate the communication unit. For this reason, the power consumption by the communication part corresponding to GPS increases, and the problem that the duration of a battery becomes short is caused.

  Accordingly, an object of the present invention is to provide a viewing angle control device, a display device, a viewing angle control method, and a program that can solve the above-described problems.

  The present invention has been made to solve the above-described problem, and a viewing angle control device according to one aspect of the present invention includes a position information acquisition unit that acquires position information, and position information in which the viewing angle is associated with the position information. / Registering in the communication history information the storage unit that stores at least the viewing angle table, the communication tag that communicates with the reader / writer device installed in the external environment, and the communication result of the communication tag and the reader / writer device, A communication history information management unit that stores the communication history information in the storage unit, and a communication result that is considered to be the same as the communication result of the current communication tag and the reader / writer device have been registered in the communication history information. A registration status determination unit that determines whether or not the registration status determination unit determines that the registration status determination unit has not registered, and causes the location information acquisition unit to acquire location information; In addition, the viewing angle associated with the acquired position information is searched from the position information / viewing angle table, the viewing angle control is performed on the display unit so as to be the searched viewing angle, and the registration status If the determination unit determines that the registration has been completed, the acquisition of the position information by the position information acquisition unit is stopped, and the viewing angle control is performed on the display unit so that a predetermined viewing angle is obtained. And a viewing angle control unit.

  In addition, a display device according to an aspect of the present invention stores at least a display unit having a variable viewing angle, a position information acquisition unit that acquires position information, and a position information / viewing angle table in which the viewing angle is associated with the position information. A communication tag that communicates with a reader / writer device installed in an external environment, a communication result of the communication tag and the reader / writer device is registered in communication history information, and the communication history information is stored in the memory A communication history information management unit to be stored in a communication unit, and whether or not a communication result having the same content as the communication result of the current communication tag and the reader / writer device has been registered in the communication history information When the registration status determination unit and the registration status determination unit determine that the registration has not been completed, the location information acquisition unit acquires location information and the acquired location The viewing angle associated with the information is retrieved from the position information / viewing angle table, the viewing angle control is performed on the display unit so as to be the retrieved viewing angle, and the registration status determination unit has registered the viewing angle. When it is determined that there is a viewing angle control unit that stops the acquisition of the position information by the position information acquisition unit and performs viewing angle control on the display unit so as to have a predetermined viewing angle. Prepare.

  In addition, the viewing angle control method according to one aspect of the present invention registers a communication result between a reader / writer device installed in an external environment and a communication tag in communication history information, and stores the communication history information in a storage unit. A history information management step; a registration status determination step for determining whether or not a communication result having the same content as the communication result of the current communication tag and the reader / writer device has been registered in the communication history information; When the registration status determination step determines that the registration has not been completed, the position information acquisition unit acquires the position information, and the viewing angle associated with the acquired position information is stored in the storage unit. The position information / viewing angle table is searched, viewing angle control is performed on the display unit so as to obtain the searched viewing angle, and the registration status determination process is performed. If it is determined that the position information has been registered, the position information acquisition unit stops the acquisition of the position information, and the viewing angle control is executed on the display unit so that the predetermined viewing angle is obtained. A viewing angle control step.

  The program according to one embodiment of the present invention is a communication that registers a communication result between a reader / writer device installed in an external environment and a communication tag in communication history information, and stores the communication history information in a storage unit. History information management means, registration status judgment means for judging whether or not a communication result having the same content as the communication result of the current communication tag and the reader / writer device has been registered in the communication history information, When it is determined by the registration status determination step that registration has not been performed, position information is acquired by the position information acquisition unit, and a viewing angle associated with the acquired position information is stored in the storage unit A search is performed from the information / viewing angle table, the viewing angle control is performed on the display unit so that the searched viewing angle is obtained, and the registration status determination process is performed. If it is determined that the position information has been registered, the position information acquisition unit stops the acquisition of the position information, and the viewing angle control is executed on the display unit so that the predetermined viewing angle is obtained. It functions as a viewing angle control means.

  According to the present invention, it is possible to obtain an effect of reducing the amount of power consumption when performing the viewing angle control of the display unit according to the surrounding environment.

It is a figure which shows the example of an external appearance of the mobile telephone as embodiment of this invention. It is a figure for demonstrating the viewing angle of the viewing angle variable display part in this embodiment. It is a figure which shows the structural example of the mobile telephone as this embodiment. It is a figure which shows the structure of the function part relevant to the viewing angle control in the mobile telephone as this embodiment. It is a figure which shows the structural example of the positional information / viewing angle table in this embodiment. It is a figure which shows the structural example of the communication log information in this embodiment. It is a figure which shows the example of a process sequence for the viewing angle control which the mobile telephone of this embodiment performs. It is a figure which shows the example of a process sequence for the viewing angle correction which the mobile telephone of this embodiment performs. It is a figure which shows the example of a process sequence for communication history information preparation which the mobile telephone of this embodiment performs.

  FIG. 1 shows an example of the appearance of a mobile phone 100 including a viewing angle control device as the present embodiment. The mobile phone 100 according to the present embodiment is a type called a folding type or a double folding type, and this figure shows a state in which the upper casing 101 is opened with respect to the lower casing 102. Yes. 1A is a front view of the mobile phone 100 as viewed from the front, FIG. 1B is a side view, and FIG. 1C is a rear view.

  As shown in FIG. 1A, the display screen unit of the viewing angle variable display unit 180 is arranged on the front panel of the upper housing unit 101 of the mobile phone 100. Further, a light intensity sensor 193 is provided on the front panel of the same upper casing 101. The light intensity sensor 193 may be provided at any position on the mobile phone 100 as long as the light intensity around the mobile phone 100 can be detected. In addition, an operation unit 170 on which various keys are arranged is provided on the front panel of the lower housing unit 102.

  In addition, as shown in FIG. 1C, a lens portion in the imaging unit 160 is disposed on the back surface of the lower housing unit 102 of the mobile phone 100. In addition, an RFID tag 194 is provided inside the mobile phone 100. By providing this RFID tag 194, the mobile phone 100 of this embodiment has a function as a boarding card.

  The mobile phone 100 also includes a variable viewing angle display unit 180 as a display unit. The viewing angle variable display unit 180 is configured to change the viewing angle. FIG. 2 schematically shows the viewing angle of the variable viewing angle display unit 180. In this figure, the viewing angle variable display unit 180 is viewed from the plane direction.

  As shown in FIG. 2, the variable viewing angle display unit 180 can change the viewing angle in a range of α ° to β °. In the figure, the viewing angle is the narrowest when the viewing angle is α °, and the display image cannot be seen even when the screen portion of the viewing angle variable display unit 180 is observed from an angle outside the viewing angle.

  The display device capable of changing the viewing angle as the variable viewing angle display unit 180 is not particularly limited, and for example, an appropriate one may be selected and adopted from the structures known so far. That's fine.

  FIG. 3 shows an internal configuration example of the mobile phone 100. In this figure, parts that are the same as those in FIG. The mobile phone 100 shown in this figure includes a CPU 110, a storage unit 120, a RAM 130, a transmission / reception unit 140, a voice input / output unit 150, an imaging unit 160, an operation unit 170, a variable viewing angle display unit 180, and a sensor unit 190.

  A CPU (Central Processing Unit) 100 is a part that executes various processes in the mobile phone 100 and controls each functional unit by executing a program stored in the storage unit 120.

  The storage unit 120 is an auxiliary storage device, and is a part that stores various data used by the CPU 100 in addition to the program executed by the CPU 100. As the hardware of the storage unit 120, for example, a flash memory can be employed.

  The RAM 130 is a main storage device, and is a part in which a program read from the storage unit 120 is expanded and the CPU 110 is used as a work area for calculation.

  The transmission / reception unit 140 is a part that performs transmission and reception operations in wireless communication. The CPU 110 transfers, for example, transmission voice data and network-compatible transmission data to the transmission / reception unit 140. The transmission / reception unit 140 modulates the transmitted transmission data and transmits it as radio waves from the antenna. In addition, the transmission / reception unit 140 demodulates the signal received by the antenna and restores the voice signal of the received voice and the data corresponding to the network. For example, the restored network compatible data is transferred to the CPU 110. The CPU 110 executes predetermined processing and control according to the transferred data. Further, the restored received voice signal is emitted from a speaker in a voice input / output unit 150 described later, for example.

  Note that the communication by the transmission / reception unit 140 is performed with a base station provided in the vicinity corresponding to a communication network of a mobile phone, for example. In the present embodiment, information indicating the number of other mobile phones that can communicate with the base station (terminal number information) is transmitted from the base station, and the transceiver 140 may receive the terminal number information. it can. The terminal number information is used by the CPU 110 to control the viewing angle of the viewing angle variable display unit 180, as will be described later.

  The voice input / output unit 150 collectively indicates parts corresponding to voice input and voice output. Specifically, although not shown, the voice input / output unit 150 includes a microphone and a voice signal processing unit as parts corresponding to voice input. The microphone collects call voice and converts it into an electrical signal. The audio signal processing unit converts a signal obtained by the microphone into a digital audio signal. The audio input / output unit 150 includes an audio signal reproduction processing unit and a speaker as parts corresponding to audio output. The audio signal reproduction processing unit converts the digital audio signal into an analog signal, performs amplification, and emits the audio as, for example, a speaker.

  The imaging unit 160 is a part that generates an image signal from an image obtained by imaging. For example, the imaging unit 160 includes a camera unit that includes an imaging system such as a CMOS sensor and a CCD, and an optical system such as a lens, and an image signal processing unit that converts an image captured by the camera unit into a digital image signal. The digital image signal generated by the imaging unit 160 can be stored in the storage unit 120 under the control of the CPU 110.

  The operation unit 170 collectively shows operators such as various keys provided in the mobile phone 100. The operation unit 170 outputs an operation signal corresponding to an operation performed on the operation element. The CPU 110 executes predetermined control and processing according to the input operation signal. Thereby, a predetermined operation corresponding to the user operation is executed in the mobile phone 100.

  The viewing angle variable display unit 180 is a part that displays various images under the control of the CPU 110, and the viewing angle of the display screen can be changed. As an example, in the standby state, an image as a standby screen is displayed on the viewing angle variable display unit 180. In addition, an image showing the calling status is displayed when the communication partner calls. In addition, the image data stored in the storage unit 120 is reproduced and displayed. Furthermore, in the imaging mode, an image captured by the imaging unit 160 is displayed as a monitor image. In addition, the viewing angle variable display unit 180 changes the viewing angle at the time of image display as illustrated in FIG. 2 under the control of the CPU 110.

  The sensor unit 190 collectively shows a plurality of sensors for acquiring a plurality of predetermined information necessary for the CPU 110 to perform viewing angle control on the viewing angle variable display unit 180. In the present embodiment, the RFID tag 194 is also included in the sensor unit 190 because the communication result of the RFID tag 194 shown in FIG.

  FIG. 4 shows a configuration example of a part mainly related to viewing angle control in the mobile phone 100. In this figure, the same parts as those in FIG. The mobile phone 100 shown in this figure includes a CPU 110, a storage unit 120, a transmission / reception unit 140, and a sensor unit 190 as parts related to viewing angle control.

  First, the sensor unit 190 will be described. As shown in this figure, the sensor unit 190 includes a position information acquisition unit 191, an acceleration sensor 192, a light intensity sensor 193, and an RFID tag 194.

  The position information acquisition unit 191 is a part that acquires the current position information of the mobile phone 100. The position information acquired here is used to specify a viewing angle corresponding to the surrounding environment of the mobile phone 100, as will be described later. The execution / stop of the operation by the position information acquisition unit 191 is controlled by the viewing angle control unit 114 described later.

  In the present embodiment, it is assumed that a positioning device corresponding to GPS (Global Positioning System) is adopted for the position information acquisition unit 191. However, the present invention is not limited to GPS and may be applied if there is a positioning device capable of positioning its own position by another method.

  The acceleration sensor 192 is a sensor that the mobile phone 100 detects acceleration. The acceleration detected by the acceleration sensor 192 is used by the movement determination unit 111 described later to determine whether or not the movement determination unit 111 is moving at a certain speed or higher.

  The light intensity sensor 193 is a sensor that detects the light intensity around the mobile phone 100. The luminous intensity detected by the luminous intensity sensor is used to correct the viewing angle set for the viewing angle variable display unit 180 by the viewing angle correction unit 115.

  As described above, the RFID tag 194 can be used as a boarding card corresponding to public transportation such as a train or a bus. In this embodiment, as will be described later, information indicating the communication result of the RFID tag 194 as a boarding card is used for viewing angle control.

  Next, a functional unit corresponding to the viewing angle control realized by the CPU 110 executing the program will be described. As these functional units, the CPU 110 includes a movement determination unit 111, a communication history information management unit 112, a registration status determination unit 113, a viewing angle control unit 114, and a viewing angle correction unit 115.

  Based on the acceleration detected by the acceleration sensor 192, the movement determination unit 111 determines whether or not the mobile phone 100 is moving at a certain speed or higher. In the present embodiment, the state in which the mobile phone 100 is moving at a certain speed or more is a state in which the user carrying the mobile phone 100 is on a public transportation such as a train or a bus. Be treated.

  The communication history information management unit 112 is a part that manages the communication history information 122 stored in the storage unit 120 based on the communication result with the reader / writer device when the RFID tag 194 is used as a boarding card.

  The communication history information management unit 112 can create the communication history information 122. For example, the reader / writer device is provided in a ticket gate (or bus fare payment machine) at a train station. When passing the ticket gate of the boarding station to get on the train (or bus) (or when getting on the bus), the user attaches the RFID tag 194 to the reader / writer device of the ticket gate (or bus fare payment machine). Let them communicate. As the communication result at this time, the communication history information management unit 112 uses the name of the boarding station (or bus stop) and the time (passage corresponding time) that passed the ticket gate (or fare payment machine) as the communication history information. 122 is registered. Also, when getting off the train (or bus) and passing through the ticket gate of the getting-off station (or getting off the bus), as a result of communication with the reader / writer device at that time, the exit station (or bus stop) The name and the time of passing the ticket gate (or fare payment machine) (the time corresponding to getting off) are registered in the communication history information 122 as getting-off history information. As described above, the communication history information management unit 112 can create and manage communication history information. A structural example of the communication history information 122 will be described later.

  The registration status determination unit 113 determines whether or not the boarding history information having the content regarded as the same as the communication result by the RFID tag 194 has been registered as the registration status of the communication history information 122. Here, when it is determined that the boarding history information having the same content as the communication result by the RFID tag 194 has been registered, the user behavior corresponding to the communication of the RFID tag 194 is as follows: Can be assumed. In other words, it can be assumed that the user has passed the ticket gate of the boarding station at almost the same time zone as usual for commuting to work or school. The determination result of the registration status determination unit 113 is used when the viewing angle control unit 114 performs control of the viewing angle and operation control of the position information acquisition unit 191 as described later.

  The viewing angle control unit 114 is a part that controls the viewing angle of the variable viewing angle display unit 180. The viewing angle control unit 114 can execute viewing angle control for the viewing angle variable display unit 180 based on the position information acquired by the position information acquisition unit 191. At this time, the viewing angle control unit 114 specifies the viewing angle corresponding to the position information acquired by the position information acquisition unit 191 from the position information / viewing angle table 121 stored in the storage unit 120, as will be described later. Control is performed on the viewing angle variable display unit 180 so that the specified viewing angle is obtained.

  Further, the viewing angle control unit 114 can execute viewing angle control based on the determination result of the registration status determination unit 113. When the registration status determination unit 113 determines that the boarding history information having the content considered to be the same as the communication result by the RFID tag 194 has been registered, as described above, the user is always required for commuting or attending school. It means that a predetermined action was taken to pass the ticket gate (or bus fare payment machine) at the boarding station at approximately the same time. Then, as the state of the user after that, the user is at the station platform or is on the train (or bus), so the surrounding area is a public place, and there are few others around. It is a situation that exists.

  Therefore, the viewing angle control unit 114 controls the viewing angle of the variable viewing angle display unit 180 so that the viewing angle is set in advance corresponding to the use of public transportation (a viewing angle corresponding to public transportation). In this case, the position information acquired by the position information acquisition unit 191 is not necessary. Therefore, the viewing angle control unit 114 stops the operation of the position information acquisition unit 191 during the period in which the viewing angle of the viewing angle variable display unit 180 is controlled by the public transport compatible viewing angle.

  The viewing angle control unit 114 can execute viewing angle control based on the determination result of the movement determination unit 111. When the movement determination unit 111 obtains a determination result indicating that the vehicle is moving at a certain speed or more, as described above, the user of the mobile phone 100 gets on a public transportation vehicle such as a train or a bus. Treated as being. Thus, when the movement determination unit 111 obtains a determination result that the vehicle is moving, the viewing angle of the variable viewing angle display unit 180 is controlled by the viewing angle corresponding to public transportation. Also in this case, the viewing angle control unit 114 stops the operation of the position information acquisition unit 191. As a result, the viewing angle control can be automatically executed in response to, for example, a case where a user purchases a ticket or the like and uses public transportation without using an RFID tag as a boarding card. become.

  In addition, the viewing angle control unit 114 can perform viewing angle control based on the number-of-terminals information notified from the base station. As described above, the transmission / reception unit 140 receives the number-of-terminals information notified from the base station. The viewing angle control unit 114 sets the viewing angle according to the number of terminals indicated by the terminal number information received by the transmission / reception unit 140, and sets the viewing angle of the viewing angle variable display unit 180 so as to be the set viewing angle. Control.

  As a specific example, when the number of terminals indicated by the number-of-terminals information is less than a certain number, there are almost no people in the vicinity, and therefore, it is considered that there is almost no opportunity for someone else to look into the display screen of the mobile phone 100. . In this case, the viewing angle control unit 114 does not perform viewing angle control for narrowing the viewing angle.

  When the number of terminals exceeds a certain level, there are more opportunities for a certain number of people to be present around and the display screen to be viewed by others. Therefore, in this case, the viewing angle control unit 114 performs viewing angle control for narrowing the viewing angle. As described above, also when the viewing angle control is executed based on the terminal number information, the viewing angle control unit 114 stops the operation of the position information acquisition unit 191.

  Note that the viewing angle set in the viewing angle control based on the number-of-terminals information may be a predetermined fixed value, but may be changed according to the number of terminals indicated by the number-of-terminals information, for example. That is, as the number of terminals increases, the number of people present in the surrounding area increases, and the opportunity for peeping at the display screen increases. Therefore, the viewing angle is changed to be narrowed as the number of terminals increases. In this way, the viewing angle is changed according to the number of surrounding people.

  As described above, in the present embodiment, the position information acquired by the position information acquisition unit 191, the determination result of the communication result of the RFID tag 194 by the registration status determination unit 113, the determination result of the movement state by the movement determination unit 111, Alternatively, the viewing angle control can be executed based on any of the terminal number information. Thereby, in the present embodiment, the viewing angle control is always appropriately performed according to the surrounding environment of the mobile phone 100.

  In addition, in this embodiment, when viewing angle control is performed based on information other than the position information acquired by the position information acquisition unit 191, the operation of the position information acquisition unit 191 is stopped. That is, the position information acquisition unit 191 does not operate constantly but operates only when viewing angle control based on the position information is necessary. Thereby, power consumption is reduced, for example, the duration of a battery can be made longer.

  The viewing angle correction unit 115 corrects the viewing angle set by the viewing angle control unit 114 based on the light intensity detected by the light intensity sensor 193. The light intensity detected by the light intensity sensor 193 indicates the brightness around the mobile phone 100. Viewing angle control is performed for privacy protection, but even if the display screen has the same brightness, it becomes harder to see as the surroundings become brighter, and conversely, the brightness of the display screen becomes more noticeable as the surroundings become darker There is a tendency. That is, the darker the surroundings, the easier it is for someone to look into the display screen. Therefore, if the adjustment is performed so that the viewing angle is narrowed as the surroundings become dark, privacy protection can be accurately performed according to the surrounding brightness.

  Therefore, the viewing angle correction unit 115 corrects the viewing angle value specified by the viewing angle control unit 114 so that the viewing angle value is decreased (narrowed) as the luminous intensity detected by the luminous intensity sensor 193 decreases. Output to the variable display unit 180. As a result, the viewing angle variable display unit 180 adjusts the viewing angle according to the surrounding brightness.

  For example, when the viewing angle variable display unit 180 has a configuration in which the viewing angle is variable according to the viewing angle driving voltage value, the viewing angle control unit 114 sets the voltage value according to the target viewing angle to the viewing angle. The drive circuit in the variable display unit 180 is designated. In response to this, the viewing angle correction unit 115 operates to correct the voltage value corresponding to the viewing angle according to the luminous intensity.

  The storage unit 120 stores a position information / viewing angle table 121 and communication history information 122 as data used by the CPU 110 corresponding to the viewing angle control.

  The position information / viewing angle table 121 has information contents in which the viewing angle is associated with the position information, and the viewing angle control unit 114 performs the viewing angle control based on the position information acquired by the position information acquiring unit 191. Used when executing.

  The communication history information 122 is created by the communication history information management unit 112 as described above, and records a communication result when the RFID tag 194 functions as a boarding card. The communication history information 122 is used by the registration status determination unit 113 during viewing angle control. That is, the registration status determination unit 113 determines whether or not the content of the communication result obtained by the communication performed by the RFID tag 194 corresponding to the boarding has been registered in the communication history information 122. As described above, when it is determined that the user has already registered, the communication of the RFID tag 194 corresponding to the current boarding is the default that the user passes through the ticket gate at approximately the same time every day corresponding to commuting or attending school. Means the action was taken.

  A structural example of the position information / viewing angle table 121 and the communication history information 122 will be described. First, FIG. 5 shows a structural example of the position information / viewing angle table 121. As shown in this figure, the position information / viewing angle table 121 has a structure in which a location and a viewing angle value are associated with each position information. The position information includes, for example, latitude and longitude. Note that height information may be further included with respect to latitude and longitude. The place indicates a facility name including the position indicated by the corresponding position information.

  The viewing angle control unit 114 acquires, from the position information / viewing angle table 121, the viewing angle associated with the position information that matches the position information acquired by the position information acquisition unit 191. The position information / viewing angle table 121 may be created in advance on the manufacturer side and stored in the storage unit 120. In addition, for example, the user may be able to additionally register a new combination of position information, location, and viewing angle range. In the position information / viewing angle table 121, the location attribute can be omitted. However, for example, when it is configured so that registration by the user is possible as described above, the name of the place is displayed on the management screen displayed for managing the position information / viewing angle table 121, including the attribute of the place. If possible, it is preferable because the user can easily manage.

  FIG. 6 shows a structural example of the communication history information 122. The communication history information shown in this figure has a structure in which a plurality of records in which boarding history information and getting-off history information are associated are stored. The boarding history information includes the boarding station (or bus stop) name and boarding time. The boarding station name indicates the name of the boarding station. The information of the boarding station name is the station name (or bus stop) transmitted from the reader / writer device when the RFID tag 194 communicates with the reader / writer device of the ticket gate (or bus fare payment machine) of the boarding station. It can be acquired by receiving data. The boarding time indicates the time when the RFID tag 194 communicates with the reader / writer device of the ticket gate (or bus fare payment machine) at the boarding station. For example, this time information can also be acquired by the RFID tag 194 receiving time data transmitted from the reader / writer device.

  Moreover, the getting-off history information includes a getting-off station name and a getting-off response time. An alighting station name shows the name of the station which alighted. The boarding time indicates the time when the reader / writer device of the ticket gate at the boarding station and the RFID tag 194 communicate with each other.

  The flowchart in FIG. 7 shows an example of a processing procedure executed by the CPU 110 for viewing angle control. The processing shown in this figure can be regarded as being appropriately executed by any of the movement determination unit 111, the registration status determination unit 113, and the viewing angle control unit 114 shown in FIG.

  First, the registration status determination unit 113 determines whether or not the RFID tag 194 has executed communication (communication support communication) with a ticket gate corresponding to the time when the public transportation is on board (step S101). Here, when it is determined that the RFID tag 194 has performed the above-described boarding communication (step S101—YES), the registration status determination unit 113 refers to the communication history information 122 (step S102). Then, it is determined whether or not the boarding history information (boarding station name and boarding time) acquired as a communication result of the current boarding-compatible communication is registered in the communication history information 122 (step S103).

  In the above determination process, the registration status determination unit 113 searches the communication history information 122 for boarding history information whose content matches the boarding history information (boarding station name and boarding time) acquired by the current boarding-compatible communication. become. However, regarding boarding times, even if they pass through the ticket gate at approximately the same time every day, for example, for commuting or attending school, they do not match completely due to some variation. Therefore, in the above search, a fixed margin is set before and after the boarding correspondence time indicated by the communication result of this time, and if it is included in the margin range, the boarding correspondence time is treated as a match. Shall.

  Then, if the boarding history information that matches the boarding history information as the current communication result is retrieved from the communication history information 122, the boarding history information corresponding to the current communication is registered in the communication history information 122. It will be determined that. The fact that it has been registered means that, as described above, the pass through the ticket gate corresponding to the current communication is performed in the same user's action every day such as commuting or attending school. In other words, it is assumed that the surrounding environment is the platform of the station or the inside of the car, and there are many people.

  When it determines with having been registered as mentioned above (step S103-YES), the viewing angle control part 114 stops operation | movement of the positional information acquisition part 191 (step S104). At the same time, for example, the viewing angle control is performed on the variable viewing angle display unit 180 so that the viewing angle (public transport-compatible viewing angle) set in advance as appropriate when riding in public transportation is set (step S105). Specifically, for example, a viewing angle driving voltage value corresponding to the set viewing angle is output to the viewing angle variable display unit 180.

  In addition, the registration status determination unit 113 performs communication (communication corresponding to getting off) with the ticket gate corresponding to the boarding of the public transportation by the RFID tag 194 under the state in which the viewing angle control in step S105 is performed. Waiting to be executed (step S106-NO). The fact that the getting-off correspondence communication has been performed means that the user has got off the vehicle of public transportation. Therefore, when it is determined that the getting-off correspondence communication is performed (step S106: YES), the process returns to step S101.

  In addition, if it is determined that the boarding communication is not executed (step S101-NO) or the boarding history information as the current communication result is not registered in the communication history information 122 (step S103-NO), the movement The following processing is executed by the determination unit 111.

  That is, the movement determination unit 111 inputs an acceleration value detected by the acceleration sensor 192 (step S107). Then, the movement determination unit 111 determines whether or not the moving acceleration unit 111 is moving at a certain speed or more based on, for example, a fluctuation pattern of the input acceleration value in unit time (step S108).

  And when it determines with it being the state in movement (step S108-YES), the viewing angle control part 114 stops operation | movement of the positional information acquisition part 191 similarly to step S104 (step S109). Further, similarly to step S105, the viewing angle control is performed on the variable viewing angle display unit 180 so that the viewing angle corresponds to public transportation (step S110).

  Next, the movement determination unit 111 waits for the state of movement to disappear under the state in which the viewing angle control is executed in step S110 (step S111-NO). Then, for example, when the user of the mobile phone 100 gets off the vehicle that has been on the vehicle so far, when the movement determination unit 111 determines that it is no longer moving (step S111-YES), the process proceeds to step S101. Return.

  Next, when it is determined in the previous step S108 that it is not in a moving state (step S108-NO), the viewing angle control unit 114 inputs the number-of-terminals information received from the base station by the transmission / reception unit 140 (step S108). S112). Then, it is determined whether or not the number of terminals indicated by the input terminal number information is greater than or equal to a certain value (step S113).

  Here, when it determines with the number of terminals being more than fixed (step S113-YES), the viewing angle control part 114 stops operation | movement of the positional information acquisition part 191 (step S114). At the same time, the viewing angle control unit 114 obtains a viewing angle corresponding to the number of terminals, and executes viewing angle control for the variable viewing angle display unit 180 so that the set viewing angle is obtained (step S115).

  The viewing angle control unit 114 waits for the number of terminals to be less than a certain value under the state in which the viewing angle control is performed in step S115 (step S116—NO), and the number of terminals is less than a certain value. If it is determined that it has become (step S116-YES), the process returns to step S101.

  If it is determined in step S113 that the number of terminals is not equal to or greater than a certain value, the viewing angle control unit 114 operates the position information acquisition unit 191 to acquire position information, and inputs this position information (step S117). Next, the viewing angle control unit 114 refers to the position information / viewing angle table 121 and searches for the viewing angle associated with the position information acquired in step S117 (step S118).

  Note that even if the position information acquired in step S117 and the position information stored in the position information / viewing angle table 121 do not completely match, if they are approximate, they are in the same place or environment. You can see. Therefore, when searching for the viewing angle, a certain margin is given to the position information acquired by the position information acquisition unit 191 and the position information included in this margin range is treated as being matched. Alternatively, a range corresponding to the corresponding location may be set for the position information stored in the position information / viewing angle table 121. Then, the viewing angle control unit 114 performs the viewing angle control on the variable viewing angle display unit 180 so as to be the viewing angle searched as described above (step S119).

  FIG. 8 shows an example of a processing procedure for viewing angle correction executed by the viewing angle correction unit 115 in the CPU 110. First, the viewing angle correction unit 115 inputs the light intensity value detected by the light intensity sensor 193 (step S201). Next, the viewing angle correction unit 115 calculates a correction amount based on the input light intensity value (step S202).

  There are several specific examples of the correction amount calculation process. For example, it is conceivable to calculate the correction amount by substituting the luminous intensity value for a predetermined function and performing the calculation. The correction amount may be an increase / decrease value with respect to the viewing angle set by the viewing angle control unit 114. It is also conceivable to use a correction ratio for the viewing angle set by the viewing angle control unit 114.

  Next, the viewing angle correction unit 115 corrects the viewing angle set for the variable viewing angle display unit 180 by the viewing angle control unit 114 as described above based on the correction amount calculated in step S202 (step S202). Step S203).

  When the viewing angle correction unit 115 executes the process as described above, the viewing angle of the variable viewing angle display unit 180 is adjusted according to the brightness around the mobile phone 100.

  The flowchart in FIG. 9 illustrates an example of a processing procedure for the communication history information management unit 112 to create the communication history information 122. The communication history information management unit 112 waits for the boarding communication by the RFID tag 194 to be executed (step S301—NO). And if it determines with boarding corresponding | compatible communication having been performed, the communication log | history information 122 memorize | stored in the memory | storage part 120 will be referred (step S302).

  Next, from the result of referring to the communication history information 122 in step S302, the communication history information management unit 112 determines that the boarding history information regarded as the same content as the boarding history information acquired by the current boarding correspondence communication is the communication history information. It is determined whether or not it is already registered in 122 (step S303).

  Here, it is assumed that it is determined that the boarding history information acquired by the current boarding correspondence communication has been registered in the communication history information 122 (step S303—YES). In this case, the communication of the RFID tag 194 this time is performed in correspondence with a predetermined operation of passing through the ticket gate at almost the same time as usual for commuting to work or school. Therefore, it is not necessary to newly register the communication result (boarding history information) of the RFID tag 194 this time in the communication history information 122. In this case, the process returns to step S301.

  On the other hand, when it is determined that the boarding history information acquired by the current boarding compatible communication has not been registered (step S303—NO), the communication history information management unit 112 determines the communication result of the RFID tag 194 this time. Boarding history information is newly registered in the communication history information 122 (step S304).

  Next, the communication history information management unit 112 waits for the getting-off correspondence communication to be executed by the RFID tag 194 by the getting-off corresponding to the current boarding (step S305). When it is determined that the getting-off correspondence communication has been executed, the communication history information management unit 112 communicates the getting-off history information as a result of the getting-off correspondence communication with the boarding history information registered in step S304. 122 is registered (step S306), and the process returns to step S301.

  By executing the above processing, the communication history information 122 may be newly registered in accordance with the use of public transportation by using the RFID tag 194 of the mobile phone 100 as a boarding card. it can.

  In the process shown in FIG. 7, the following four viewing angle controls are possible. That is, the viewing angle control based on the position information acquired by the position information acquisition unit 191, the viewing angle control when the communication result of the RFID tag 194 is already registered in the communication history information 122, and a certain speed based on the acceleration value Viewing angle control when it is determined that the user is moving and viewing angle control based on the number-of-terminals information is possible. One of these four viewing angle controls is selectively performed.

  However, for example, viewing angle control based on terminal number information can be used in combination with the other three viewing angle controls. That is, for example, when viewing angle control is executed in any of steps S105, S110, and S119 of FIG. 7, the viewing angle is changed to be adjusted according to the number of terminals indicated by the terminal number information. . When this process is adopted, it can be considered that the number of terminals indicated by the number-of-terminals information is used for correcting the viewing angle.

  The following viewing angle control is also conceivable. That is, image data obtained by capturing the face of a person who does not want to see the screen is registered in advance. Then, when it is recognized that the registered face exists in the image captured by the image capturing unit 160, the viewing angle is controlled to be narrowed.

  In the description so far, the viewing angle is controlled by changing the viewing angle of the entire display screen portion of the viewing angle variable display unit 180. However, for example, the viewing field of only the portion where the mail address is displayed on the display screen unit. The viewing angle of only a predetermined partial area in the display screen unit may be controlled, for example, by narrowing the angle.

  Moreover, although the case where the viewing angle control of the viewing angle variable display unit 180 provided in the foldable mobile phone 100 is performed is taken as an example in the above-described embodiment, other types of mobile phones and smartphones are referred to as mobile phones. It can also be applied to terminals. Furthermore, the present invention can be applied to a portable terminal device that is said to be a tablet terminal larger than a smartphone, which has been spreading in recent years.

  The above-described mobile phone 100 has a computer system inside. Each process described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  Further, the program for realizing each functional unit in FIG. 4 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by the computer system and executed, so that description has been made so far. Operations related to the viewing angle control may be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 100 Mobile phone 101 Upper housing part 102 Lower housing part 110 CPU
DESCRIPTION OF SYMBOLS 111 Movement determination part 112 Communication history information management part 113 Registration status determination part 114 View angle control part 115 View angle correction part 120 Storage part 121 Position information / view angle table 122 Communication history information 140 Transmission / reception part 150 Voice input / output part 160 Imaging part 170 Operation Unit 180 Viewing Angle Variable Display Unit 190 Sensor Unit 191 Position Information Acquisition Unit 192 Acceleration Sensor 193 Photometric Sensor 194 RFID Tag

Claims (8)

A location information acquisition unit for acquiring location information;
A storage unit for storing at least a position information / viewing angle table in which the viewing angle is associated with the position information;
A communication tag for communicating with a reader / writer device installed in an external environment;
A communication history information management unit that registers communication results of the communication tag and the reader / writer device in communication history information, and stores the communication history information in the storage unit;
A registration status determination unit that determines whether or not a communication result having the same content as the communication result of the communication tag and the reader / writer device is registered in the communication history information;
When it is determined by the registration status determination unit that it has not been registered, the position information acquisition unit acquires position information, and the viewing angle associated with the acquired position information is determined as the position information / viewing angle. When searching from the table, performing the viewing angle control on the display unit so as to be the searched viewing angle, and when the registration status determining unit determines that it is registered, the position by the position information acquiring unit A viewing angle control device comprising: a viewing angle control unit that stops obtaining information and performs viewing angle control on the display unit so that a predetermined viewing angle is obtained. The communication history information management unit
As the communication result, at least correspondence with a boarding response time when communicating with the reader / writer device according to a boarding in public transportation and a boarding correspondence time when communicating with the reader / writer device according to getting off And register it in the communication history information,
The registration status determination unit
When the boarding correspondence time indicated by the communication result of the current communication tag and the reader / writer device is the same as the boarding correspondence time registered in the communication history information, the current communication tag and the reader / writer It is determined that the communication result of the writer device has been registered in the communication history information,
The viewing angle control device includes:
The viewing angle control device according to claim 1, wherein the viewing angle control executed in response to the determination that the registration status determination unit has already registered is terminated at a timing when the getting-off response time is reached. It further includes a movement determination unit that determines whether or not the vehicle is moving at a certain speed or more,
The viewing angle control device includes:
When it is determined by the movement determination unit that the vehicle is moving at a certain speed or more, the acquisition of the position information by the position information acquisition unit is stopped and the field of view with respect to the display unit is set to a predetermined viewing angle. The viewing angle control device according to claim 1, wherein angle control is executed. The viewing angle control unit
When the number of surrounding wireless terminal devices indicated by the terminal number information acquired by wireless communication with the outside is greater than or equal to a certain value, the acquisition of the position information by the position information acquisition unit is stopped and the terminal number information indicates The viewing angle control device according to any one of claims 1 to 3, wherein the viewing angle control is performed on the display unit so that the viewing angle is set according to the number of wireless terminal devices. 5. A viewing angle correction unit that corrects the viewing angle of the display unit controlled by the viewing angle control unit based on the luminous intensity detected by the luminous intensity sensor. 5. The viewing angle control device described in 1. A display unit with a variable viewing angle;
A location information acquisition unit for acquiring location information;
A storage unit for storing at least a position information / viewing angle table in which the viewing angle is associated with the position information;
A communication tag for communicating with a reader / writer device installed in an external environment;
A communication history information management unit that registers communication results of the communication tag and the reader / writer device in communication history information, and stores the communication history information in the storage unit;
A registration status determination unit that determines whether or not a communication result having the same content as the communication result of the communication tag and the reader / writer device is registered in the communication history information;
When it is determined by the registration status determination unit that registration has not been performed, the position information acquisition unit acquires position information, and the viewing angle associated with the acquired position information is determined as the position information / viewing angle. When searching from the table, performing the viewing angle control on the display unit so as to be the searched viewing angle, and when the registration status determining unit determines that it has been registered, the position information acquiring unit A display device comprising: a viewing angle control unit that stops acquisition of position information and performs viewing angle control on the display unit so that a predetermined viewing angle is obtained. A communication history information management step of registering a communication result between a reader / writer device installed in an external environment and a communication tag in communication history information, and storing the communication history information in a storage unit;
A registration status determination step for determining whether or not a communication result having the same content as the communication result of the communication tag and the reader / writer device is registered in the communication history information;
If it is determined in the registration status determination step that the registration has not been completed, the position information acquisition unit acquires position information, and the viewing angle associated with the acquired position information is stored in the storage unit. When the position information / viewing angle table is searched, viewing angle control is performed on the display unit so that the searched viewing angle is obtained, and the registration status determining step determines that the position has been registered, the position information A viewing angle control method comprising: a viewing angle control step of stopping the acquisition of position information by the information acquisition unit and executing viewing angle control on the display unit so that a predetermined viewing angle is obtained. Computer
A communication history information management means for registering a communication result between a reader / writer device installed in an external environment and a communication tag in communication history information and storing the communication history information in a storage unit;
Registration status determining means for determining whether or not a communication result having the same content as the communication result of the communication tag and the reader / writer device is registered in the communication history information;
If it is determined in the registration status determination step that the registration has not been completed, the position information acquisition unit acquires position information, and the viewing angle associated with the acquired position information is stored in the storage unit. When the position information / viewing angle table is searched, viewing angle control is performed on the display unit so that the searched viewing angle is obtained, and the registration status determining step determines that the position has been registered, the position information A program for causing the display unit to function as viewing angle control means for stopping the acquisition of position information by the information acquisition unit and performing viewing angle control on the display unit so that a predetermined viewing angle is obtained.

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