JP2006338220A - Portable terminal and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal capable of taking measures to deter a peep so that it is hard to see display contents from the surroundings without performing special operation. <P>SOLUTION: A CPU11 controls an angle of field change part 22 to change a view angle of a display part 4 from 130° to a narrow angle of 60° when it is set to a silent mode in displaying content of a mail to be transmitted/received on the display part 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable terminal device and a program capable of changing and controlling the display state (viewing angle, luminance, etc.) of a display screen.

Conventionally, what controls the viewing angle by utilizing the characteristics (viewing angle dependency) of the liquid crystal display screen is, for example, controlling the toggle of the viewing angle according to the key operation, or running applications A portable terminal device and a variable viewing angle display device that control the viewing angle in accordance with the type of display are known (see Patent Document 1).
JP 2004-62094 A

  However, in the technique of this patent document, the viewing angle can be controlled as necessary, but a user operation is required to switch the viewing angle. It is also possible to suppress peeping from the surrounding people by narrowing the viewing angle when composing mail or browsing received mail, but it is narrow when composing or viewing mail at home On the other hand, it is difficult to see at the viewing angle.

  An object of the present invention is to provide a portable terminal device capable of taking a peeping suppression measure that makes it difficult to view display contents from the surroundings without performing a special operation.

The invention according to claim 1 is a portable terminal device capable of changing and controlling the display state of the display screen, and is set to an operation restriction mode that is switched when used within the public when displaying predetermined information on the display screen. Determining means for determining whether or not the display is set, and changing means for changing the display state of the display screen as a deterrent against peeping when it is determined by the determining means that the operation restriction mode is set; It is characterized by comprising.
Furthermore, a program for realizing the main functions shown in the invention described in claim 1 is provided to the computer (the invention described in claim 8).

The invention described in claim 1 may be as follows.
The predetermined information is a mail content when an e-mail sender or destination is a specific address, and the determination unit determines whether or not the operation restriction mode is set when displaying the mail content of the specific address. (Invention of Claim 2)

  The operation restriction mode is a manner mode or a radio wave prohibition mode recommended for use in the public, and the changing means temporarily changes the display state of the display screen while the operation restriction mode is switched. When this operation restriction mode is canceled, the original display state set in advance is restored (the invention according to claim 3).

  Detection means for detecting whether or not the user is in a specific public area, and mode switching means for switching to the operation restriction mode when the detection means detects that the user is in the specific public area. 4).

  The changing means changes at least one of a display viewing angle, display luminance, and display contrast (the invention according to claim 7).

The invention according to claim 5 is a portable terminal device capable of changing and controlling the display state of the display screen, and whether or not it is used in the public and a specific function requiring security measures is selected. A determination means for determining whether or not there is a display screen display state as a deterrence measure against peeping when the determination result by the determination means is a public use and the specific function is selected And a changing means for changing.
Furthermore, a program for realizing the main functions shown in the invention described in claim 5 is provided to the computer (invention described in claim 9).

The invention according to claim 6 is a portable terminal device capable of changing and controlling the display state of the display screen, and determines whether or not it is used in the public and displays a specific type of information requiring security measures. As a deterrence measure against peeping when it is used in the public as a result of the determination by the determination unit and the specific type of information is a display target, And changing means for changing the display state of the display screen.
Furthermore, a program for realizing the main functions shown in the invention described in claim 6 is provided to the computer (the invention described in claim 10).

  According to the first aspect of the present invention, when the predetermined information is displayed on the display screen, the display screen is used as a deterrent against peeping when the operation restriction mode is set to be switched when used within the public. Since the display state is changed, it is possible to make the display content difficult to see from the surroundings without performing a special operation, which is effective as a peeping suppression measure. In other words, on the condition that the display target is information such as private matters such as e-mail, and in an environment where there are many surroundings such as in a train (switched to operation restriction mode), By changing the display state of the display screen, it can be difficult to see from the surroundings.

  According to the invention described in claim 2, in addition to the same effect as that of the invention described in claim 1, the predetermined information is the mail content when the sender or destination of the e-mail is a specific address, and this specific address When the mail content is displayed, it is determined whether or not the operation restriction mode is set. Therefore, a peeping suppression measure can be applied to the mail content depending on who the other party is.

  According to the invention described in claim 3, in addition to having the same effect as the invention described in claim 1, the operation restriction mode is a manner mode or a radio wave prohibition mode recommended for use in the public, While switching to this operation restriction mode, the display state of the display screen is temporarily changed, and when this operation restriction mode is canceled, the original display state set in advance is restored. The display state can be changed in conjunction with the setting / canceling of the manner mode or the radio wave prohibition mode.

  According to the invention described in claim 4, in addition to having the same effect as the invention described in claim 1 described above, when it is detected that the user is in a specific public area, the mode is switched to the operation restriction mode. For example, it is possible to automatically switch to the operation restriction mode when entering the station.

  According to the invention of claim 7, in addition to having the same effect as the invention of claim 1 described above, at least one of the display viewing angle, the display brightness, and the display contrast is changed. It is effective as a peeping prevention measure. In other words, it is difficult to see from surrounding people by narrowing the display viewing angle or lowering the display brightness or display contrast. In this case, it is more effective if two or more types, for example, the display viewing angle is narrowed and the display luminance is lowered at the same time.

According to the fifth aspect of the invention, it is determined whether or not it is used in the public, and whether or not a specific function requiring security measures is selected, and as a result, used in the public. If the specific function is selected, the display state of the display screen is changed as a deterrent against peeping, making it difficult to see the display contents from the surroundings without performing special operations. Can be effective as a peeping prevention measure. In other words, it is a case where a function such as a private function is selected, such as the mail function or address book function, and it is used in an environment where there are many surroundings such as in a train (for example, set to manner mode) It is possible to make it difficult to see from the surroundings by taking peeping prevention measures.
The invention of claim 5 has the same effect as that of the invention of claim 7 described above.

According to the invention described in claim 6, it is determined whether or not the information is used in the public, and whether or not a specific type of information requiring security measures is a display target. If the display type is a display target for a specific type of information, the display state of the display screen is changed as a deterrent against peeping. It can be difficult to see from the surroundings, and is effective as a peep suppression measure. In other words, on the condition that it is used in an environment where there are many people around, such as in a train, and that it displays confidential information such as company files and address books that requires security measures. It can be difficult to see from the surroundings by taking peeping prevention measures.
The invention according to claim 6 has the same effect as that of the invention according to claim 7 described above.

Example 1
A first embodiment of the present invention will be described below with reference to FIGS.
This embodiment illustrates a case where the present invention is applied to a mobile phone device as a mobile terminal device, and FIG. 1 is an external perspective view of the mobile phone device.
This cellular phone device is configured such that an upper housing 1 and a lower housing 2 are attached to be openable / closable (foldable) via a hinge mechanism unit 3, and the upper housing 1 is provided with a display unit 4. The lower housing 2 is provided with a key operation unit 5. The display unit 4 is a main screen (liquid crystal screen) that can display character information, image information, and the like with high definition in a state where the folding apparatus main body is opened, and the viewing angle thereof can be controlled to be changed. The key operation unit 5 includes various push button type keys, and performs dial input, character input, command input, and the like, and outputs a key input signal corresponding to the key operation.

FIG. 2 is a block diagram showing basic components of the mobile phone device.
The CPU 11 is a central processing unit that controls the overall operation of the mobile phone device in accordance with various programs in the storage unit 12. The storage unit 12 is a non-volatile memory (internal memory), and is configured by, for example, a flash memory, and has a program area and a data area. In the program area, operations shown in FIGS. A program for realizing the present embodiment is stored according to the procedure. The recording medium 13 is a detachable portable memory in which captured image data, schedule information, and the like are written, and various data and programs are externally supplied. The recording medium 13 includes, for example, smart media and an IC card. . The memory 14 is an internal memory having a work area, and includes, for example, a DRAM (Direct Random Access Memory), an SDRAM (Synchronous DRAM), or the like.

  The CPU 11 includes a display unit 4 and a key operation unit 5 as input / output peripheral devices, a communication unit 15, a speaker 16, a microphone 17, a notification unit 18, a camera imaging unit 19, a GPS (Global Positioning System) unit 20, A non-contact IC unit 21 and a viewing angle changing unit 22 are connected. The communication unit 15 amplifies the received radio wave from the antenna 23 and demodulates it into a received baseband signal, and digitally converts the received baseband signal. The CPU 11 makes a telephone call based on the reception result from the communication unit 15. Executes processing according to calling, receiving e-mail, and internet connection. The speaker 16 and the microphone 17 are an audio speaker and an audio microphone. The notification unit 18 is a speaker, LED (light emitting diode), and vibration motor for notification of incoming calls and the like, and is recommended for use in the public where there are many people around, such as in a train. In the mode (manner mode), the vibration motor is driven in place of the ringtone and vibration notification is performed.

  The camera imaging unit 19 is a digital camera unit capable of still image shooting and moving image shooting. The GPS unit 20 uses a satellite and a ground control station to receive and acquire a current position (longitude / latitude information) strictly measured from a difference in radio wave arrival time or a positional relationship, and includes a map including the current position. Used when displaying information. The non-contact IC unit 21 includes a coil antenna and a memory, and is used not only as an electronic money payment function but also as a gate pass for an admission ticket or the like. Distance communication is performed.

  The viewing angle changing unit 22 is stacked on the liquid crystal display panel constituting the display unit 4 and has a configuration in which liquid crystal is sealed between a pair of upper and lower glass substrates with a deflection plate. Here, the viewing angle changing unit 22 changes and controls the viewing angle of the display unit 4 by changing the orientation direction of the liquid crystal molecules according to the voltage applied between the glass substrates. The viewing angle can be changed to a wide viewing angle (for example, 130 °) and a narrow viewing angle (for example, 60 °) by the control of the viewing angle changing unit 22. In this case, the viewing angle changing unit 22 may control the viewing angle of the display unit 4 in three or more steps according to the magnitude of the applied voltage. For example, the viewing angle may be controllable in four stages of 130 °, 90 °, 60 °, and 45 °, and an arbitrary viewing angle may be set by user selection from a plurality of viewing angles.

FIG. 3 is a diagram showing the configuration of the address book 24.
The address book 24 is configured to include items of “security flag” in addition to “name”, “mail address”, “phone number”, and “address” as destination information. This “security flag” indicates that a security measure (a countermeasure against peeping) is to be applied, and is a flag arbitrarily set by a user operation. When displaying the received mail or the created mail, the CPU 11 refers to the address book 24 to determine whether or not the “security flag” is set in the sender or destination of the mail, and the “security flag” is set. In such a case, the display unit 4 is controlled to be changed from a wide viewing angle to a narrow viewing angle on condition that the manner mode is set.

  Next, the operation concept of the cellular phone device in the first embodiment will be described with reference to the flowcharts shown in FIGS. Here, each function described in these flowcharts is stored in the form of a readable program code, and operations according to the program code are sequentially executed. Moreover, the operation | movement according to the above-mentioned program code transmitted via the transmission medium can also be performed sequentially. This is the same in other embodiments described later. In addition to the recording medium, the program / data supplied from the outside via the transmission medium can be used to execute operations specific to this embodiment.

FIG. 4 is a flowchart showing the mail creation process, which starts when the item “Create Mail” is selected and specified from the menu screen.
First, when the item “Create Mail” is selected and specified from the menu screen, the CPU 11 causes the display unit 4 to display and output a mail creation screen (step A1). In this state, it is determined whether or not the address book 24 has been instructed to be called, that is, whether or not the destination mail address is to be input with reference to the address book 24 (step A2). If this is the case (NO in step A2), a manual input of the destination address from the key operation unit 5 is accepted (step A15). Here, it is checked whether or not the manually entered address is registered in the address book 24 by searching the address book 24 based on the manually entered destination address (step A16). If the same address is registered, it will be described later. However, if the manually entered address is not registered in the address book 24, the creation of the mail text is accepted (step A13), and then the created and created mail is sent to the manually entered destination address. Transmit (step A14).

  On the other hand, when the destination mail address is input by referring to the address book 24 (YES in step A2), the address book 24 is read and its contents are displayed in a list (step A3). When a desired destination is selected and specified from this list screen (step A4), the address book 24 is referred to, whether or not the “security flag” is set corresponding to the selected and specified destination, or the above-described step. It is determined whether or not the “security flag” is set corresponding to the destination address manually input in A15 (step A5). If it is not set (NO in step A5), the destination address is automatically input. After reading and acquiring the “mail address” of the destination from the address book 24 (step A12), the input creation of the mail text is accepted (step A13). The mail thus created is transmitted to the destination (step A14).

  Further, when the “security flag” is set corresponding to the destination address selected and designated from the list screen of the address book 24, or “security flag” corresponding to the destination address manually input in the above step A15. Is set (YES in step A5), it is determined whether the manner mode is set (step A6). If the manner mode is cancelled, the process proceeds to processing step A12 for automatically inputting the destination address. If the manner mode is set, the CPU 11 instructs the viewing angle changing unit 22 to change the viewing angle. Give (step A7). In this case, in the viewing angle changing unit 22, a voltage having a magnitude corresponding to the change instruction is applied between the glass substrates, and the display unit 4 is changed from a wide viewing angle to a narrow viewing angle by a change in the orientation direction of the liquid crystal molecules. Change it. For example, the viewing angle of the display unit 4 is changed from 130 ° to 60 °.

  After performing such viewing angle control, the CPU 11 reads the “mail address” of the destination from the address book 24 (step A8) and accepts input creation of the mail text (step A9). In this case, the mail text is created while displaying the input character string data on the display unit 4. In this case, the mail is created with a narrow viewing angle. Then, after sending this created mail to the destination (step A10), the CPU 11 gives a viewing angle return instruction to the viewing angle changing unit 22 (step A11). In this case, in the viewing angle changing unit 22, a voltage having a magnitude corresponding to the return instruction is applied between the glass substrates, and the viewing angle of the display unit 4 is changed to the original wide viewing angle by the change in the orientation direction of the liquid crystal molecules. Return to. For example, the viewing angle of the display unit 4 is changed from 60 ° to 130 °. When an arbitrary viewing angle is set by the user from among a plurality of types of viewing angles, this setting viewing angle (for example, 90 ° ).

FIG. 5 is a flowchart showing the mail reception process.
First, when receiving a mail via the communication unit 15, the CPU 11 determines whether or not the manner mode is set (step B1). Here, if the manner mode is cancelled, the speaker and LED constituting the notification unit 18 are driven to notify the incoming mail by blinking display together with the ringing tone (step B2), but if the manner mode is set. Then, the vibration motor is driven instead of the ringing tone to notify the vibration (step B3). Here, when the incoming mail is opened (YES in step B4), it is determined whether the destination address obtained from this mail is registered in the address book 24 (step B5). If the corresponding address is not registered, The mail text is continuously displayed until the user gives a close instruction (steps B11 and B12). In this case, if the viewing angle of the display unit 4 is set to 130 °, the mail is displayed with this wide viewing angle.

  If the destination address is registered in the address book 24 (YES in step B5), it is determined whether the “security flag” is set for the destination (step B6). If it is not set, Moving to step B11 described above, the mail text is displayed with a wide viewing angle. If the “security flag” is set, the viewing angle changing instruction is given to the viewing angle changing unit 22, and the display unit 4 is displayed with a wide viewing angle. The angle is changed to a narrow viewing angle (step B7). Accordingly, the viewing angle of the display unit 4 is changed from 130 ° to 60 °, for example. Then, the CPU 11 displays the mail text on the display unit 4 until there is a close instruction from the user (steps B8 and B9). Here, when receiving the close instruction, the CPU 11 gives a viewing angle return instruction to the viewing angle changing unit 22, and returns the viewing angle of the display unit 4 to the original wide viewing angle (step B10). For example, the viewing angle of the display unit 4 is changed from 60 ° to 130 °. When an arbitrary viewing angle is set from among a plurality of viewing angles by user selection, this setting viewing angle (for example, 90 ° Return to °).

  As described above, in the first embodiment, the CPU 11 controls the viewing angle changing unit 22 to display the mail content on the display unit 4 when the manner mode is set. Since the viewing angle is changed to a narrow viewing angle, it is possible to make the display content difficult to see from the surroundings without performing a special operation, which is effective as a peeping prevention measure. In other words, the display section is based on the condition that it is used for displaying mail contents such as private affairs, and that it is used in an environment where there are many people in the surroundings such as in a train (set in manner mode). By changing 4 to a narrow viewing angle, it is difficult to see from the surroundings.

  In this case, peeping suppression measures can be taken according to who the destination of the outgoing mail or the sender of the incoming mail is, that is, whether the address book 24 is a partner whose “security flag” is set. . In addition, the display viewing angle is changed while switching to the manner mode, and when the manner mode is canceled, the original wide viewing angle is restored, so the display is linked to the manner mode setting / cancellation. The viewing angle can be changed.

In the first embodiment described above, the manner mode is shown as the operation restriction mode, but it may be a radio wave prohibition mode (radio wave off mode) in a hospital or the like. Even in this radio wave prohibition mode, the display viewing angle may be changed in conjunction with the setting / cancellation.
In the first embodiment described above, the display viewing angle is controlled to be changed, but the display brightness and the display contrast may be changed. In this case, it is difficult to see from surrounding people by lowering the display brightness and display contrast. Note that it is more effective to reduce the display luminance or the display contrast at the same time as reducing the display viewing angle.

On the other hand, a recording medium (for example, a CD-ROM, a flexible disk, a RAM card, etc.) on which program codes for executing the above-described units are recorded may be provided to the computer. That is, it is a recording medium having a program code that can be read by a computer, and when displaying predetermined information on a display screen, it is determined whether or not it is set to an operation restriction mode that can be switched when used in the public. When it is determined that the function is set to the operation restriction mode, the computer that records the program for realizing the function of changing the display state of the display screen as a deterrent measure against peeping is readable. A recording medium may be provided.
(Example 2)

A second embodiment of the present invention will be described below with reference to FIGS.
In the first embodiment described above, a peeping suppression measure is applied depending on who the destination of the outgoing mail or the sender of the incoming mail is. However, this second embodiment has a function that is arbitrarily selected by the user. In response, peeping deterrence measures were taken. In the second embodiment, the manner mode is automatically set / released when entering or leaving the train station.
Here, the same or the same names in both embodiments are denoted by the same reference numerals, the description thereof will be omitted, and the following description will focus on the features of the second embodiment. .

FIG. 6 is a diagram showing the configuration of the function table 25.
This function table 25 is configured to store “security flags” set corresponding to various functions. That is, a “mail creation function” for inputting and creating a transmission mail, a “TV function” for displaying a TV screen by operating a television receiver, a “camera function” for recording and saving a photographed image by operating a camera, “Address book function” for browsing the contents of the address book, registering personal information, “game function” for displaying the game screen by operating the electronic game, “money history function” for browsing the usage history of electronic money, etc. There is an item of “security flag” corresponding to various functions.

  This “security flag” indicates that a security measure (a measure against peeping) is to be applied, as in the first embodiment, and is a flag arbitrarily set by a user operation. In the figure, a circle indicates a function in which the “security flag” is arbitrarily set. In the example shown in the figure, “mail creation function”, “address book function”, and “money history function” are indicated. This indicates that the “security flag” is set.

FIG. 7 is a flowchart showing an outline of the operation when the manner mode is automatically set / cancelled when entering or leaving the train station.
Here, when a short-distance wireless communication is performed between the ticket gate and the non-contact IC unit 21 when passing through a ticket gate device (not shown), the non-contact IC unit 21 receives an entrance response or exit. A response is given to the CPU 11. The CPU 11 checks the response from the non-contact IC unit 21. When the entrance response is received (step C1), the manner mode is set (step C2), and when the exit response is received (step C3). The manner mode is reset (step C4).

FIG. 8 is a flowchart showing an outline of the operation of the mobile phone device according to the second embodiment, which is started when the power is turned on.
First, the CPU 11 reads out and displays a predetermined standby image in the standby state (step D1), checks whether or not an incoming call or mail is received (step D2), and detects an incoming call or incoming mail when detecting an incoming call or incoming mail. The incoming call handling process is executed (step D3).

  Further, when any function such as “mail creation function”, “TV function”, “camera function” is selected and designated (YES in step D4), it is determined whether or not the manner mode is set (step S4). D5). Here, when a function selection operation is performed under the manner mode, the function table 25 is searched based on the selected function to check for the presence of a “security flag” (step D6). When the “security flag” is set corresponding to the selection function, the CPU 11 gives a viewing angle change instruction to the viewing angle changing unit 22 and narrows the display unit 4 from a wide viewing angle (130 °). The viewing angle (60 °) is changed and the display brightness is reduced (for example, reduced by 30%) (step D7). After temporarily changing the display state of the display unit 4 in this way, a temporary flag is set to indicate the state (step D8).

  Then, the process proceeds to step D9, and for example, a screen corresponding to the selection function such as a mail creation screen or an address book registration screen is displayed and output, and processing corresponding to the selection function is executed until the user gives an instruction to terminate the function (step D10). , D11). Here, when the function end is instructed, the presence or absence of the temporary flag described above is checked (step D12). If the temporary flag is not set, the process returns to the first step D1, but if the temporary flag is set, the CPU 11 Gives a viewing angle return instruction to the viewing angle changing unit 22 to return the viewing angle of the display unit 4 to the original wide viewing angle (130 °) and to return the display brightness to the original high brightness (step). D13). In this case, when an arbitrary viewing angle is set by a user selection from a plurality of viewing angles, the setting viewing angle is restored, and an arbitrary luminance is selected from a plurality of display luminances by a user selection. If it has been set, the set brightness is restored. And after resetting a temporary flag (step D14), it returns to the first step D1.

  As described above, in this second embodiment, the CPU 11 searches the function table 25 when “any function such as“ mail creation function ”,“ TV function ”,“ camera function ”, and the like is selected and designated. If the security flag is checked and a function that requires security measures is selected, if the manner mode is set, the viewing angle and display brightness of the display unit 4 are changed. It is possible to make it difficult to see the displayed content from the surroundings without performing a simple operation, which is effective as a peeping prevention measure. In other words, when a function such as a private function is selected, such as the mail function or the address book function, or when it is used in an environment where there are a large number of people around, such as in a train (set to silent mode) On the condition, it can be difficult to see from the surroundings by taking peeping deterrent measures.

In this case, since the viewing angle of the display unit 4 is narrowed and the display state is changed so as to reduce the display luminance, it is possible to make it harder to see from the surroundings.
In addition, the manner mode is automatically set / cancelled when entering or leaving the train station, so there is no need to set / cancel manner mode every time you use the train. Is possible.

  In the second embodiment described above, after checking whether or not the manner mode is set as shown in steps D5 and D6 of FIG. 8, it is checked whether the “security flag” is set in the selection function. However, conversely, on the condition that the “security flag” is set in the selection function, it may be confirmed whether or not the manner mode is set.

In the second embodiment described above, the display viewing angle and the display brightness are changed and controlled, but in addition to the display viewing angle and the display brightness, the display contrast may be changed. In this case, it is difficult to see the surrounding people by lowering the display brightness and the display contrast.
In the second embodiment described above, the manner mode is set and canceled by wireless communication between the ticket gate device and the non-contact IC unit 21. For example, the current mode acquired by the GPS unit 20 is used. The manner mode may be set and canceled by detecting whether the vehicle is in a public area such as a train or a movie theater according to the position.

A function of determining whether or not a specific function requiring a security measure is selected as well as determining whether or not the recording medium has a computer-readable program code and is used in the public; As a result of the determination, if the use is within the public and the specific function is selected, a program for realizing a function of changing the display state of the display screen as a deterrent against peeping A recording computer-readable recording medium may be provided.
(Example 3)

A third embodiment of the present invention will be described below with reference to FIG.
In the second embodiment described above, a peeping suppression measure is applied according to a function arbitrarily selected by the user, but this third embodiment suppresses peeping according to the file attribute when the file is opened. Measures are taken. That is, when a file that is confidential and needs security measures such as a company file and an address book is opened, a peeping suppression measure is taken by changing the viewing angle of the display unit 4.

In the third embodiment, it is determined whether or not there is a large number of surroundings depending on whether or not the radio wave inhibition mode is set instead of the manner mode. In the third embodiment, a “security attribute” is set for a file that is confidential and requires security measures. This “security attribute” indicates that a security measure (a countermeasure against peeping) is to be applied, and is a flag arbitrarily set by a user operation.
Hereinafter, in the first and third embodiments, the same or the same name in the first embodiment are denoted by the same reference numerals, the description thereof will be omitted, and the following description will focus on the features of the third embodiment. Shall.

FIG. 9 is a flowchart showing the operation when the specified file is opened and displayed.
First, the CPU 11 determines whether or not the radio wave prohibition mode is set (step E1). If the radio wave prohibition mode is not set, the CPU 11 checks whether or not the facility entrance flag is set (step E2). The facility entrance flag is set by performing wireless communication between the non-contact IC unit 21 and the facility-side gate device when entering a facility such as a station ticket gate or a movie theater. Basically, in the same manner as in the flowchart, “set facility entrance flag” is performed in step C2, and “reset facility entrance flag” is performed in step C4.

If neither the radio wave prohibition mode nor the facility entrance flag is set (NO in Steps E1 and E2), the designated file is displayed open on the display unit 4 (Step E3). At that time, the file close is instructed. (Step E4), the file contents are displayed with a wide viewing angle (130 °).
On the other hand, if either the radio wave prohibition mode or the facility entrance flag is set (YES in steps E1 and E2), the attribute information of the designated file is acquired (step E5), and the presence / absence of “security attribute” is checked. (Step E6).

  If the “security attribute” is not added, the process proceeds to step E3, where the designated file is opened and displayed with a wide viewing angle. If the “security attribute” is added, the CPU 11 displays the viewing angle changing unit 22. Is given a viewing angle change instruction, and the display unit 4 is changed from a wide viewing angle (130 °) to a narrow viewing angle (60 °) (step E7). Then, the designated file is opened and displayed on the display unit 4 (step E8). At this time, the file content is displayed with a narrow viewing angle until the file close is instructed (step E9). Here, when the file close is instructed, the CPU 11 gives a viewing angle return instruction to the viewing angle changing unit 22, and returns the viewing angle of the display unit 4 to the original wide viewing angle (step E10). In this case, when an arbitrary viewing angle is set by user selection from among a plurality of viewing angles, the setting viewing angle is restored.

  As described above, in the third embodiment, when the radio wave prohibition mode or the facility entrance flag is set, the CPU 11 checks whether or not the “security attribute” is set in the designated file, and performs security measures. If it is a necessary file, it is possible to make it difficult to see the display content from the surroundings without performing a special operation in order to change and control the viewing angle of the display unit 4, and it is effective as a peeping prevention measure It becomes. In other words, it should be used in an environment where there are many people in the surroundings, such as in a train, etc. It is possible to make it difficult to see from the surroundings by taking peeping prevention measures on the condition that the radio wave prohibition mode or the facility entrance flag is set).

  In the third embodiment described above, the display viewing angle is controlled to be changed, but the display brightness and the display contrast may be changed. In this case, it is difficult to see from surrounding people by lowering the display brightness and display contrast. Note that it is more effective to reduce the display luminance or the display contrast at the same time as reducing the display viewing angle. Further, the manner mode may be set and canceled by detecting whether or not the vehicle is in a public area such as a train or a movie theater according to the current position acquired by the GPS unit 20.

  In addition, it is a recording medium having a computer-readable program code, and it is determined whether or not it is used in the public, and whether or not a specific type of information requiring security measures is to be displayed. And a function to change the display state of the display screen as a deterrent against peeping when it is used within the public and the specific type of information is to be displayed. It is also possible to provide a computer-readable recording medium in which a program for causing the program to be recorded is recorded.

   In addition, in each of the above-described embodiments, the present invention is not limited to the mobile phone device, and can be similarly applied to, for example, a mobile terminal device such as a PDA, an electronic camera, an electronic wristwatch, and a music player. Also, in a portable terminal device with a TV function, when watching a program arbitrarily selected and designated in advance from an EPG (Electronic TV Program Guide), the manner mode or the radio wave prohibition mode is set, or in a train, a movie theater, etc. The display viewing angle of the designated program may be changed and controlled depending on whether the user is in a public area.

The external appearance perspective view of the mobile telephone apparatus applied as a portable terminal device. The block diagram which showed the basic component of the mobile telephone apparatus. The figure which showed the structure of the address book. The flowchart which showed the mail preparation process started to be performed when the item of “mail preparation” is selected and specified from the process menu screen. The flowchart which showed mail reception processing. The figure which showed the structure of the function table 25 of 2nd Example. In the 2nd Example, the flowchart which showed the operation | movement outline | summary in the case of being automatically set / cancelled to manner mode at the time of entering / exiting a train station premises. The flowchart which showed the operation | movement outline | summary of the mobile telephone apparatus in 2nd Example. The flowchart which showed the operation | movement at the time of carrying out the open display of the designated file in 3rd Example.

Explanation of symbols

4 Display unit 5 Key operation unit 11 CPU
12 storage unit 14 memory 15 communication unit 20 GPS unit 21 non-contact IC unit 22 viewing angle change unit 24 address book 25 function table

Claims (10)

A portable terminal device capable of changing and controlling a display state of a display screen,
A discriminating means for discriminating whether or not the operation restriction mode is set to be switched when used in the public when the predetermined information is displayed on the display screen;
When it is determined that the operation restriction mode is set by the determination means, a change means for changing the display state of the display screen as a deterrent against peeping;
A portable terminal device comprising: The predetermined information is a mail content when an e-mail sender or destination is a specific address, and the determination unit determines whether or not the operation restriction mode is set when displaying the mail content of the specific address. To
2. The mobile terminal device according to claim 1, wherein the mobile terminal device is configured as described above. The operation restriction mode is a manner mode or a radio wave prohibition mode recommended for use in the public,
The change means temporarily changes the display state of the display screen while the operation restriction mode is switched, and returns to the original display state set in advance when the operation restriction mode is canceled. ,
2. The mobile terminal device according to claim 1, wherein the mobile terminal device is configured as described above. Detection means for detecting whether or not the user is in a specific public area;
A mode switching means for switching to the operation restriction mode when the detection means detects that it is in a specific public area;
2. The mobile terminal device according to claim 1, further comprising: A portable terminal device capable of changing and controlling a display state of a display screen,
A determination means for determining whether or not a public function is used and determining whether or not a specific function requiring a security measure is selected;
As a result of determination by the determination means, when the public function is used and the specific function is selected, a change means for changing the display state of the display screen as a deterrent against peeping;
A portable terminal device comprising: A portable terminal device capable of changing and controlling a display state of a display screen,
A determination means for determining whether or not the information is used within the public and determining whether or not a specific type of information requiring security measures is a display target;
As a result of determination by the determination means, when the public information is used and the specific type of information is a display target, a change means for changing the display state of the display screen as a deterrent against peeping;
A portable terminal device comprising: The changing means changes at least one of display viewing angle, display brightness, and display contrast.
The portable terminal device according to any one of claims 1, 5, and 6. Against the computer,
A function for determining whether or not the operation restriction mode is set to be switched when used in the public when displaying predetermined information on the display screen; and
When it is determined that the operation restriction mode is set, a function for changing the display state of the display screen as a deterrent against peeping,
A program to realize Against the computer,
A function for determining whether or not a public function is used and a function for determining whether or not a specific function requiring a security measure is selected;
As a result of this determination, when the public function is used and the specific function is selected, a function for changing the display state of the display screen as a deterrent against peeping,
A program to realize Against the computer,
A function for determining whether or not the information is used in the public and determining whether or not a specific type of information requiring security measures is a display target;
As a result of this determination, when it is a public use and the specific type of information is a display target, a function of changing the display state of the display screen as a deterrent against peeping,
A program to realize

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