JP2007150866A - Mobile telephone set, visual field angle changing method of mobile telephone set, and visual field changing program of mobile telephone set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile telephone set, a visual field angle changing method of the mobile telephone set, and a visual field angle changing program of the mobile telephone set to change the visual field angle of a display screen according to a use situation of the mobile telephone set. <P>SOLUTION: The visual field angle of a liquid crystal screen is changed extremely simply by judging a receiving mail with high privacy, a mail preparing image, a static image prepared by a user, a dynamic image prepared by the user, a scheduling data, a ToDo data or the like, by automatically identifying by a control portion that there is a person behind the user, and by changing the visual field angle of the liquid crystal screen according to the judgment result and the identification result without a necessity to stick a filter on the liquid crystal screen by the user and to adjust the visual field angle manually as conventional. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mobile phone, a viewing angle changing method for a mobile phone, and a viewing angle changing program for a mobile phone, and in particular, a mobile phone that changes a viewing angle of a display screen according to a use situation of a mobile phone, and a viewing angle for a mobile phone. The present invention relates to an angle change method and a mobile phone viewing angle change program.

  2. Description of the Related Art In recent years, mobile phones have become more multifunctional, and various information communication such as not only voice calls but also transmission / reception of e-mails, browsing of homepages on WWW (World Wide Web) and browsing of photos is possible. Therefore, the user can exchange e-mails and the like using a mobile phone regardless of location. However, when a mobile phone is used regardless of the location, the display contents can be seen by the people around you when using the mobile phone in a crowded situation such as in a train or bus while you are out. was there.

  In Patent Document 1, when the user looks into the display screen, the user is photographed by the camera, is determined to be a person's face, and the illumination of the display device is automatically turned on, so long as the user is looking into the display screen. By continuing to illuminate, the display screen will not darken during the confirmation of the display content, and the display content will not be able to be confirmed, and the backlight will light up quickly without any input from the operation keys. There has been proposed a portable display device that has improved mechanical durability without being bothered and by reducing the number of mechanical operations of the operation keys.

  In Patent Document 2, information display means for displaying information, viewing angle changing means disposed on the display surface of the information display means, and changing the viewing angle of the viewing angle changing means are transmitted through the viewing angle changing means. The viewing angle control means for changing the viewing angle of the information display means visually recognized in accordance with the input operation input through the predetermined operation means or the type of application being executed by the mobile terminal device Accordingly, there has been proposed a portable terminal device and a variable viewing angle display device that can easily change the viewing angle of the information display unit according to the usage situation by controlling the viewing angle of the viewing angle changing unit according to the situation.

In Patent Document 3, a portable terminal including a display unit capable of switching a viewing angle to a plurality of patterns, a viewing angle setting unit that sets a viewing angle of the display unit, and a photographing unit that captures an image or video, When the display means is in a mode for displaying an image or video taken by the photographing means, the viewing angle setting means sets the display means to a wider viewing angle than the viewing angle set in a mode other than the mode. There has been proposed a portable terminal capable of clearly viewing a display screen other than a person standing in front of the display means.
JP 2002-335501 A JP 2004-062094 A JP 2004-233527 A

  However, the above invention has the following problems.

  According to the above-described invention, the display means can be easily changed according to the use situation by changing the viewing angle of the display means to a narrow viewing angle or a wide viewing angle depending on the input operation by the user, the type of application being executed, and the like. Although the viewing angle can be changed, it is necessary for the user to set the viewing angle by himself. In addition, when the viewing angle of the display means is controlled according to the type of application, since the setting of the viewing angle depends on the application being executed, the viewing angle should be controlled appropriately according to the usage situation where the user is placed. I can't.

  For example, when a highly private item such as an incoming mail is displayed on the LCD screen, the viewing angle of the LCD screen is narrowed, and when a less private item such as a standby screen is displayed on the LCD screen, By automatically widening the viewing angle of the screen, the viewing angle can be controlled without any operation by the user. However, since the viewing angle of the display screen is narrowed even when there is no other person behind, the user's own field of view may be unnecessarily narrowed.

  Further, as a method for narrowing the viewing angle of the display means, there is a filter or the like attached to the surface of the liquid crystal screen. However, although this filter can solve the problems seen by the surrounding people, there is a problem that the user's own field of view is always narrowed. Further, there are cases where it is desired to widen the viewing angle depending on the use situation, and it is not possible to quickly respond to the situation with this filter. Further, the filter attached to the surface of the liquid crystal screen may be peeled off from the surface of the liquid crystal screen due to deterioration.

  Therefore, the present invention provides the following: when the standby screen, received mail, mail creation screen, still image, video, schedule data, and ToDo data are displayed on the liquid crystal screen, By automatically identifying the presence of a person and changing the viewing angle of the LCD screen, the user does not need to manually adjust the viewing angle by attaching a filter to the LCD screen as in the past. An object of the present invention is to propose a mobile phone that can change the viewing angle of a liquid crystal screen very easily, a viewing angle changing method for a mobile phone, and a viewing angle changing program for a mobile phone.

  According to the first aspect of the present invention, a display unit that can switch a viewing angle to a plurality of patterns, a viewing angle setting unit that sets a viewing angle of the display unit, and a predetermined area in which the display screen can be viewed is photographed as a subject. In a mobile phone having a photographing unit that performs the above-described operation, a person other than the user can determine whether the data displayed on the display unit is personal or not, and image data photographed by the photographing unit. Determining means for determining whether or not the image is captured, wherein the determining means determines that a person other than the user is included in the image data, and the determining means determines that the data is personal. When determined, the viewing angle setting means narrows the viewing angle of the display means.

  According to a second aspect of the present invention, in the mobile phone according to the first aspect, when the data is an image or a video and the data is not an image or a video created or photographed by the own device, the discrimination means It is characterized by discriminating that data is not personal.

  According to a third aspect of the present invention, in the mobile phone according to the first or second aspect, the determination unit detects a color distribution of the image data, and when a plurality of skin color components are detected from the color distribution, the image It is determined that a person other than the user is included in the data.

  Invention of Claim 4 has the memory | storage means to memorize | store a user's face photograph in the mobile telephone of Claim 1 or 2, The said determination means, All the face photographs contained in the said image data, When comparing the face photograph of the user stored in the storage means and the face data different from the face photograph of the user is included in the image data, a person other than the user is reflected in the image data. It is characterized by determining.

  According to a fifth aspect of the present invention, a display unit that can switch a viewing angle to a plurality of patterns, a viewing angle setting unit that sets a viewing angle of the display unit, and a predetermined area in which the display screen can be viewed is photographed as a subject. A method of changing a viewing angle of a mobile phone having an imaging unit that performs a determination step of determining whether or not data displayed on the display unit is personal, and an image captured by the imaging unit A determination step for determining whether or not a person other than the user is included in the data, and it is determined by the determination step that a person other than the user is included in the image data, and the data is personalized by the determination step. When it is determined that the viewing angle is determined, the viewing angle setting means includes a step of narrowing the viewing angle of the display means.

  The invention according to claim 6 is the mobile phone viewing angle changing method according to claim 5, wherein the data is an image or a video, and the data is not an image or video created or photographed by the own device. The determining step is characterized in that it is determined that the data is not personal.

  A seventh aspect of the present invention is the mobile phone viewing angle changing method according to the fifth or sixth aspect, wherein the determining step includes a step of detecting a color distribution of the image data, and a plurality of skin color components from the color distribution. And a step of determining that a person other than the user is captured in the image data when detected.

  According to an eighth aspect of the present invention, in the mobile phone viewing angle changing method according to the fifth or sixth aspect, the mobile phone has storage means for storing a user's face photograph, and the determination step includes the image data. A step of comparing all the face photos included in the user's face photo stored in the storage means, and when the face photo different from the user's face photo is included in the image data, And a step of determining that a person other than the user is included in the image data.

  According to a ninth aspect of the present invention, a display means capable of switching a viewing angle to a plurality of patterns, a viewing angle setting means for setting a viewing angle of the display means, and a predetermined area where the display screen can be viewed as a subject is photographed. A viewing angle changing program for a mobile phone having a photographing unit that performs a determination process for determining whether or not data displayed on the display unit is personal, and an image photographed by the photographing unit A determination process for determining whether or not a person other than the user is included in the data; and the determination process determines that a person other than the user is included in the image data; and the determination process determines that the data is personal When it is determined that the viewing angle is determined, the viewing angle setting means has a process of narrowing the viewing angle of the display means.

  According to a tenth aspect of the present invention, in the viewing angle changing program for a mobile phone according to the ninth aspect, when the data is an image or a video and the data is not an image or a video created or photographed by the own device, The determination process is characterized in that it is determined that the data is not personal.

  The invention according to claim 11 is the viewing angle change program for a mobile phone according to claim 9 or 10, wherein the determination process includes a process of detecting a color distribution of the image data, and a plurality of skin color components from the color distribution. And a process for determining that a person other than the user is captured in the image data when detected.

  According to a twelfth aspect of the present invention, in the mobile phone viewing angle changing program according to the ninth or tenth aspect, the mobile phone has storage means for storing a user's face photograph, and the determination process includes the image data. When the image data includes a process for comparing all the face photographs included in the user's face photograph stored in the storage means, and the face photograph different from the user's face photograph, And a process for determining that a person other than the user is captured in the image data.

  The present invention controls when a standby screen, received mail, mail creation screen, still image, moving image, schedule data, and ToDo data are displayed on a liquid crystal screen, and the presence of a person behind the user. By automatically identifying and changing the viewing angle of the LCD screen, the user does not need to manually adjust the viewing angle by attaching a filter to the LCD screen as in the past. The viewing angle can be changed.

  The configuration and operation of a mobile phone according to an embodiment of the present invention will be described below.

  First, the system configuration of the mobile phone according to the present embodiment will be described with reference to FIG.

  The cellular phone according to the present embodiment includes an antenna 1, a transceiver unit 2, a transmitter / receiver circuit 3, a microphone 4, a speaker 5, an operation unit 6, a memory 7, a control unit 8, a liquid crystal display unit 9, a viewing angle switching unit 10, and a camera. 11, an image recognition unit 12, and a color distribution detection unit 13.

  In the mobile phone according to the present embodiment, when the operation unit 6 is operated and the power is turned on, the control unit 8 can operate each unit. In this state, when the operation unit 6 is operated to dial the other party's telephone number, or when the other party's telephone number registered in the memory 7 is called to the liquid crystal display unit 9 and the transmission key is operated, the transmission signal is transmitted to the transmission / reception unit 2. Is transmitted from the antenna 1 to the base station. When the other party's mobile phone or the like responds, the response signal is received by the transmission / reception unit 2 via the antenna 1 and the transmission / reception circuit 3 becomes operable, and the microphone 4 and the speaker 5 can be used to talk to the other party. It becomes.

  The liquid crystal display unit 9 comprises an LCD (Liquid Crystal Display), a menu corresponding to various functions of the mobile phone, radio wave reception status, remaining battery level, outgoing call history, incoming call history, e-mail text, phone book, schedule, image Etc. are displayed. When the power is turned on, a display indicating that the power is on is displayed. When a telephone number is entered or when the other party is called, the telephone number is displayed. When the other party answers, a message to that effect is displayed.

  The viewing angle switching unit 10 switches the viewing angle of the liquid crystal display unit 9 under the control of the control unit 8. A specific switching operation of the viewing angle in the viewing angle switching unit 10 will be described later. In the liquid crystal display unit 9, the transmittance characteristic with respect to the viewing angle is changed by changing the voltage applied to the liquid crystal cell. Therefore, by preparing a plurality of gradation voltage conversion characteristics for the input signal and switching the gradation voltage conversion characteristics to drive the liquid crystal cell, the plurality of characteristics can be visually synthesized to control the viewing angle. .

  The camera 11 is controlled by the control unit 8 at the time of subject shooting, and performs shooting when a predetermined button of the operation unit 6 is operated while looking at the liquid crystal display unit 9. The captured image data is transferred to and stored in the memory 7. The color distribution detection unit 13 analyzes the color component of the image data photographed by the camera 11 and inputs it to the image recognition unit 12.

  The image recognition unit 12 checks the presence or absence of a skin color component near the center of the image captured by the camera 11, determines whether there are a plurality of persons in the image, and sends the determination result to the control unit 8. Notice. Alternatively, a face photograph of the user of the mobile phone is taken with the camera 11 in advance, and the image data is stored in the memory 7. Then, the image recognition unit 12 compares the face photograph included in the current image data sent from the camera 11 with the face photograph stored in the memory 7, and the face photograph other than the user is added to the current image data. It is also possible to adopt a configuration in which it is determined whether or not is included, and the determination result is notified to the control unit 8.

  The memory 7 holds an ID (shown in Table 1) given to the content displayed on the liquid crystal display unit 9 in addition to the above-mentioned telephone number of the other party, the user's face photograph, and the like. For example, ID = 1 is assigned to a highly private received mail, a mail creation screen, a still image created by the user, a moving image created by the user, schedule data, ToDo data, etc. ID = 0. The control unit 8 controls the viewing angle switching in the viewing angle switching unit 10 based on the determination result by the image recognition unit 12 and the ID assigned to each displayed data.

  Next, the appearance of the mobile phone according to the present embodiment will be described with reference to FIG.

  The cellular phone according to this embodiment is divided into an upper housing 14 and a lower housing 15 with a central hinge portion 16 as a boundary, and is formed to be foldable with the hinge portion 16 as a boundary.

  The upper housing 14 is attached so that the antenna 1 for transmission and reception can be pulled out and stored, and transmits and receives radio waves to and from the base station via the antenna 1. In addition, a liquid crystal display unit 9 is provided on the front surface of the upper housing 14, and menus corresponding to various functions of the mobile phone, radio wave reception status, remaining battery level, outgoing call history, incoming call history, e-mail text, All kinds of information such as a telephone directory, a schedule, and images can be displayed on the liquid crystal display unit 9. Furthermore, a speaker 5 is provided above the liquid crystal display unit 9 in front of the upper housing 14 so as to reproduce the received voice of the communication destination user and the incoming call tone.

  The camera 11 is disposed in the vicinity of the liquid crystal display unit 9 and is located at a position where an operator looking through the liquid crystal display unit 9 is regarded as a subject, and a normal CCD (Charge Coupled Device), a C-MOS element, or the like is used.

  The lower casing 15 is provided with a microphone 4 that can collect the voice of the user during a call at the lower surface. The lower casing 15 is provided with an operation unit 6 such as a numeric keypad, a calling key, a redial key, an end call and power key, a clear key, and an e-mail key at the center. In addition, a battery pack (not shown) is attached to the lower housing 15 on the back side thereof, and when the power is turned on by operating the operation unit 6, power is supplied from the battery pack to the internal circuit clock. Then, the mobile phone is activated to be in an operable state.

  Next, specific processing for changing the viewing angle of the liquid crystal display unit 9 will be described with reference to FIG.

  When the operation unit 6 is operated by the user and the control unit 8 requests to display arbitrary data on the liquid crystal display unit 9 (step S301), the displayed data is stored in any data registered in Table 1. It is determined whether it is applicable (step S302).

  If the displayed data corresponds to any of the data registered in Table 1, the registered data is taken into consideration whether the displayed data is created by the user. Is assigned to the displayed data (step S303).

  For example, when the data displayed on the liquid crystal display unit 9 is a still image, a moving image, or a standby screen created by a person other than the user downloaded from the network, the data is determined to be low-private data. ID = 0 is assigned (see Table 1).

  In addition, when the data displayed on the liquid crystal display unit 9 is a still image or a moving image taken by the user with the camera 11, a received mail, a mail creation screen, schedule data, or ToDo data, the data is highly private data. And ID = 1 is assigned (see Table 1).

  When the process of assigning ID to the data displayed on the liquid crystal display unit 9 is completed (step S303), the control unit 8 determines whether or not there is a person behind the user from the image data photographed by the camera 11 (step S303). S304).

  Specifically, the control unit 8 controls the camera 11 to photograph a person who is at a position where the liquid crystal display unit 9 can be viewed. The captured image data is transferred to and stored in the memory 7. The color distribution detection unit 13 analyzes the color component of the image data photographed by the camera 11 and inputs it to the image recognition unit 12. The image recognition unit 12 checks the presence or absence of a skin color component near the center of the image captured by the camera 11, determines whether there are a plurality of persons in the image, and sends the determination result to the control unit 8. Notice.

  Alternatively, the image recognition unit 12 compares the user's face photograph previously captured by the camera 11 and stored in the memory 7 with the face photograph included in the image data captured by the camera 11, and is stored in the image data. It is also possible to determine whether or not a face photo other than the user is included, and notify the control unit 8 of the determination result.

  If only the user exists in the image data (step S304 / NO), even if highly private data is displayed on the liquid crystal display unit 9, there is no fear of being looked at by others. The viewing angle switching unit 10 is requested to widen the viewing angle of the liquid crystal display unit 9 (step S305).

  On the other hand, if it is determined that there are a plurality of persons in the image data (step S304 / YES), whether or not the ID assigned to the data displayed on the liquid crystal display unit 9 in step S303 is 0. Judgment is made (step S306).

  If the ID assigned to the data displayed on the liquid crystal display unit 9 is 0 (step S306 / YES), the data is low private data, so the control unit 8 causes the viewing angle switching unit 10 to display the liquid crystal. It is requested to widen the viewing angle of the display unit 9 (step S305).

  On the other hand, when the ID given to the data displayed on the liquid crystal display unit 9 is 1 (step S306 / NO), since the data is highly private data, the control unit 8 displays the viewing angle switching unit 10. To narrow the viewing angle of the liquid crystal display unit 9 (step S307).

  According to the above processing, when the standby screen, received mail, mail creation screen, still image, video, schedule data, and ToDo data are displayed on the liquid crystal screen, the data to be displayed and a person behind the user are present. By automatically identifying this and changing the viewing angle of the LCD screen, the user does not have to manually adjust the viewing angle by attaching a filter to the LCD screen as in the past. The viewing angle of the LCD screen can be changed.

  The present invention can be applied to notebook PCs, electronic notebooks, and PDAs. These devices have built-in cameras or external cameras that can take pictures of users, and automatically identify that schedule data, business documents, e-mail data, private data, etc. are displayed on the LCD screen. If the scene that emphasizes visibility, such as browsing the home page, is displayed on the LCD screen automatically, it automatically identifies that the viewing angle is displayed on the LCD screen. It is possible to automatically widen the viewing angle of the liquid crystal screen.

It is a block diagram which shows the system configuration | structure of the mobile telephone concerning this embodiment. It is an external view of the mobile phone concerning this embodiment. It is a flowchart which shows the procedure of the data display process of the mobile telephone concerning this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antenna 2 Transmission / reception part 3 Transmission / reception circuit 4 Microphone 5 Speaker 6 Operation part 7 Memory 8 Control part 9 Liquid crystal display part 10 View angle switching part 11 Camera 12 Image recognition part 13 Color distribution detection part 14 Upper housing | casing 15 Lower housing | casing 16 Hinge part

Claims (12)

A mobile phone comprising: display means capable of switching a viewing angle to a plurality of patterns; viewing angle setting means for setting the viewing angle of the display means; and photographing means for photographing a predetermined area where the display screen can be viewed as a subject. In
Determining means for determining whether or not the data displayed on the display means is personal;
Determining means for determining whether or not a person other than the user is reflected in the image data photographed by the photographing means;
When it is determined by the determination means that a person other than the user is reflected in the image data, and the determination means determines that the data is personal, the viewing angle setting means includes the display means A mobile phone characterized by narrowing the viewing angle.   The discrimination means discriminates that the data is not personal when the data is an image or video and the data is not an image or video created or photographed by itself. 1. The mobile phone according to 1. The determination means includes
Detecting the color distribution of the image data;
3. The mobile phone according to claim 1, wherein when a plurality of skin color components are detected from the color distribution, it is determined that a person other than the user is reflected in the image data. Storage means for storing the user's face photo;
The determination means includes
Compare all face photos included in the image data with the user's face photos stored in the storage means,
3. The mobile phone according to claim 1, wherein when the face data different from the face photograph of the user is included in the image data, it is determined that a person other than the user is reflected in the image data. . A mobile phone comprising: display means capable of switching a viewing angle to a plurality of patterns; viewing angle setting means for setting the viewing angle of the display means; and photographing means for photographing a predetermined area where the display screen can be viewed as a subject. The viewing angle change method of
A determination step of determining whether or not the data displayed on the display means is personal;
A determination step of determining whether or not a person other than the user is captured in the image data captured by the imaging means;
When it is determined in the determination step that a person other than the user is reflected in the image data, and the determination step determines that the data is personal, the viewing angle setting means is the display means A method for changing the viewing angle of a mobile phone, comprising the step of narrowing the viewing angle.   The determination step determines that the data is not personal when the data is an image or a video and the data is not an image or a video created or photographed by the device itself. 5. A method for changing a viewing angle of a mobile phone according to 5. The determination step includes
Detecting a color distribution of the image data;
7. A viewing angle of a mobile phone according to claim 5, further comprising a step of determining that a person other than the user is reflected in the image data when a plurality of skin color components are detected from the color distribution. Modification method. The mobile phone has storage means for storing a user's face photo,
The determination step includes
Comparing all face photos included in the image data with the user's face photos stored in the storage means;
7. The method of determining whether a person other than the user is included in the image data when the face data different from the user's face photo is included in the image data. A method of changing a viewing angle of the mobile phone described. A mobile phone comprising: display means capable of switching a viewing angle to a plurality of patterns; viewing angle setting means for setting the viewing angle of the display means; and photographing means for photographing a predetermined area where the display screen can be viewed as a subject. The viewing angle change program of
A determination process for determining whether or not the data displayed on the display means is personal;
A determination process for determining whether or not a person other than the user is captured in the image data captured by the imaging means;
When it is determined by the determination process that a person other than the user is reflected in the image data, and the determination process determines that the data is personal, the viewing angle setting unit is configured to display the display unit. A program for changing the viewing angle of a mobile phone, characterized by comprising a process of narrowing the viewing angle of the mobile phone.   The determination process determines that the data is not personal when the data is an image or a video and the data is not an image or a video created or photographed by an own device. 9. A viewing angle changing program for a mobile phone according to 9. The determination process includes
Processing for detecting a color distribution of the image data;
The viewing angle of a mobile phone according to claim 9 or 10, further comprising a process of determining that a person other than a user is reflected in the image data when a plurality of skin color components are detected from the color distribution. Change program. The mobile phone has storage means for storing a user's face photo,
The determination process includes
A process of comparing all the facial photos included in the image data with the facial photos of the user stored in the storage means;
11. The method according to claim 9, further comprising: determining that a person other than the user is included in the image data when the image data includes a face photo different from the user's face photo. The viewing angle changing program for the mobile phone described.

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