Abstract:
An information processing apparatus, method and computer program product cooperate to provide a device that changes the way content is displayed depending on an inclination angle of the device. The device includes an inclination acquisition device that acquires inclination information of a display housing that houses a display with a displayed image thereon. A first controller causes a first change to the displayed image according to the inclination information. A second controller causes a second change to the displayed image when a predetermined condition is met with respect to the inclination information. By including subcomponents that cooperate in this manner, the device allows a user to perceive a displayed image at various viewing angles and easily recognize whether certain displayed features are able to be actuated when the device is positioned in a certain inclination angle.

Description:
FIELD 
     The present disclosure relates to an information processing device, an information processing method, and a computer program product, and particularly to an information processing device, an information processing method, and a computer program product that brings a display change to a displayed image. 
     BACKGROUND 
     In recent years, the arithmetic capability and the communication speed of information processing devices have been rapidly enhanced. However, in a relatively small-sized information processing device such as a portable terminal, for example, since the size of a display unit which displays processing results is limited, there are cases where the quantity of information to be displayed is restricted and high performance as described above is not fully utilized. 
     Thus, a technique for making effective use of a display unit of an information processing device has been developed. For example, there is a technique in which a touch panel is provided in the display unit to secure operability and expand the display unit. JP-A-2010-109552 and JP-A-2009-009252 disclose a technique in which pushing conditions of a touch panel are used as operation inputs. 
     In addition, there is a technique in which changes in the state of a housing of an information processing device are used as operation inputs, and various operation inputs are realized without reducing the size of a display unit. JP-A-2004-334642 discloses a technique in which application of shaking to a housing is used as an operation input. JP-A-2005-245619 discloses a technique in which inclination of a housing is used as an operation input. 
     SUMMARY 
     However, as recognized by the present inventors there is a problem in that unintended operation inputs by a user occur when there are various operation input methods as described in JP-A-2010-109552, JP-A-2009-009252, JP-A-2004-334642, and JP-A-2005-245619. For example, in an information processing device in which inclination causes a certain operation, there is a case where inclination is acquired as an operation input even with the user&#39;s unintended slight inclination of the housing. For this problem, not acquiring slight inclination of a housing as an operation input was considered. In such a case, however, for example, if nothing happens even though the housing of an information processing device is inclined, it is problematic in that information regarding whether inclination of a housing is not set as an operation input or just the response of a sensor detecting inclination is poor is not delivered to the user. 
     Thus, it is desirable to provide an information processing device, an information processing method, and a program which are novel and improved and can perform suppression control for operation inputs and provide a user with information on the suppression control. 
     According to an exemplary information processing apparatus embodiment, the apparatus includes 
     an inclination acquisition device that acquires inclination information of a display housing that houses a display with a displayed image thereon; 
     a first controller that causes a first change to the displayed image according to the inclination information; and 
     a second controller that causes a second change to the displayed image when a predetermined condition is met with respect to the inclination information. 
     One aspect of this embodiment is that it may further include 
     a processing circuit that includes at least one of the inclination acquisition device, the first controller and the second controller. 
     According to another aspect the processing circuit responds to a detected shaking of the display housing by performing a zero point adjustment. 
     According to another aspect the predetermined condition is met when the inclination information exceeds a predetermined threshold. 
     According to another aspect the embodiment may further include 
     the display, the display being a touchpanel, wherein 
     the predetermined condition is met when an operation on the touchpanel is not detected. 
     According to another aspect the second change to the displayed image is a movement of at least one of a shadow of a displayed object, a background portion of the displayed object, and reflected light. 
     According to another aspect when an amount of inclination of the display housing is greater than zero but less than a predetermined amount, the displayed object does not move on the display despite the movement of the at least one of the shadow of the displayed object, the background portion of the displayed object, and the reflected light. 
     According to another aspect when an amount of inclination of the display housing is greater than a predetermined amount, the displayed object moves on the display along with the movement of the at least one of a shadow of the displayed object, the background portion of the displayed object, and the reflected light. 
     According to another aspect when the amount of inclination of the display housing is greater than the predetermined amount, other objects that were previously hidden are displayed on the display. 
     According to another aspect the first change to the displayed image is a movement of a displayed object, the displayed object being user-selectable to trigger a processing operation. 
     According to an exemplary information processing method embodiment, the method includes 
     acquiring from an inclination acquisition device inclination information of a display housing that houses a display with a displayed image thereon; 
     making a first change to the displayed image according to the inclination information; and 
     making a second change to the displayed image when a predetermined condition is met with respect to the inclination information. 
     According to one aspect of this embodiment, the making a first change and the making a second change are made with a processing circuit. 
     According to another aspect the embodiment includes responding to a detected shaking of the display housing by performing a zero point adjustment. 
     According to another aspect the predetermined condition is met when the inclination information exceeds a predetermined threshold. 
     According to another aspect the making the first change to the displayed image includes moving on the display at least one of a shadow of a displayed object, a background portion of the displayed object, and reflected light. 
     According to another aspect when an amount of inclination of the display housing is greater than zero but less than a predetermined amount, not moving the displayed object on the display while moving the at least one of the shadow of the displayed object, the background portion of the displayed object, and the reflected light. 
     According to another aspect when an amount of inclination of the display housing is greater than a predetermined amount, moving the displayed object on the display along while also moving the at least one of the shadow of the displayed object, the background portion of the displayed object, and the reflected light. 
     According to another aspect when the amount of inclination of the display housing is greater than the predetermined amount, displaying other objects that were previously hidden on the display. 
     According to another aspect the second change to the displayed image is a movement of a displayed object, the displayed object being user-selectable to trigger a processing operation. 
     According to an exemplary non-transitory computer readable storage device embodiment, the device includes instructions stored thereon that when executed by a processing circuit perform an information processing method that includes 
     acquiring from an inclination acquisition device inclination information of a display housing that houses a display with a displayed image thereon; 
     making a first change to the displayed image according to the inclination information; and 
     making a second change to the displayed image when a predetermined condition is met with respect to the inclination information. 
     According to the embodiments of the present disclosure described above, it is possible to provide an information processing device, an information processing method, and a program which can perform suppression control for operation inputs and provide a user with information on the suppression control. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram showing the appearance of a portable terminal according to a first embodiment of the present disclosure; 
         FIG. 2  is a block diagram showing a functional configuration of the portable terminal according to the first embodiment of the present disclosure; 
         FIG. 3  is a diagram showing an example of a display change in the portable terminal according to the first embodiment of the present disclosure; 
         FIG. 4  is a flowchart showing a process executed in the portable terminal according to the first embodiment of the present disclosure; 
         FIG. 5  is a diagram showing another example of a display change in the portable terminal according to the first embodiment of the present disclosure; 
         FIG. 6  is a diagram showing still another example of a display change in the portable terminal according to the first embodiment of the present disclosure; 
         FIG. 7  is a diagram showing an example of a display change in a portable terminal according to a second embodiment of the present disclosure; 
         FIG. 8  is a flowchart showing a process executed in the portable terminal according to the second embodiment of the present disclosure; 
         FIG. 9  is a flowchart showing a process executed in a portable terminal according to a third embodiment of the present disclosure; 
         FIG. 10  is a diagram showing an example of a display change in a portable terminal according to a fourth embodiment of the present disclosure; and 
         FIG. 11  is a diagram illustrating an example of suppression of a display change in each embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to accompanying drawings. Repetitive description will be omitted by giving the same reference numerals to constituent elements that have substantially the same functional configuration in the present specification and the drawings. 
     Furthermore, description will be provided in the following order. 
     1. First Embodiment 
     2. Second Embodiment 
     3. Third Embodiment 
     4. Fourth Embodiment 
     5. Fifth Embodiment 
     6. Supplement 
     1. First Embodiment 
     First, a first embodiment of the present disclosure will be described. 
     (Configuration of Portable Terminal) 
       FIG. 1  is a diagram showing the appearance of a portable terminal  100  according to a first embodiment of the present disclosure. The portable terminal  100  is an example of an information processing device. Referring to  FIG. 1 , the portable terminal  100  includes a housing  110 , and the housing  110  is provided with an LCD (Liquid Crystal Display)  120 . The LCD  120  is an example of a display unit and displays images as the output of the portable terminal  100 . Furthermore, the display unit is not limited to the LCD  120 , and an arbitrary display device such as an organic EL (Electro-Luminescence) panel may be used. The LCD  120  may be provided with a touch panel  130 . The touch panel  130  senses a user&#39;s contact with the LCD  120 . When an operation unit such as a button is separately provided, the touch panel  130  may not necessarily be provided. The portable terminal  100  can have various functions of, for example, voice calling, network communication, music and video reproduction, capturing moving and still images, and the like. The housing  110  may be provided with other devices to realize these functions, for example, a speaker, a microphone, a camera, input and output terminals, an antenna, or the like, in addition to the LCD  120  and the touch panel  130 . 
     Subsequently, an example of an image displayed on the LCD  120  will be described with reference to  FIG. 1 . The LCD  120  displays an icon  121  accompanied by an icon shadow  122 . On the back side of the icon  121  and the icon shadow  122 , a background  123  is displayed. The icon  121  is an example of an object included in the displayed image. The icon  121  can be an operational component which is operated by a user through, for example, the touch panel  130 . In this case, the user can give an operation instruction for realizing a predetermined function in the portable terminal  100  by contacting the area where the icon  121  of the LCD  120  is displayed through the touch panel  130 . In addition, the icon  121  may be an image indicating content that can be used by the portable terminal  100 . Furthermore, the object is not limited to the icon  121 , and may be, for example, an image of video content. The icon shadow  122  is displayed as a visual effect to emphasize the stereoscopic effect when, for example, the icon  121  is to be three-dimensionally displayed. The background  123  is displayed as the background of the icon  121  and the icon shadow  122 . For example, when the icon  121  is an operational component that is operated by a user through the touch panel  130 , an operation instruction is not given to the portable terminal  100  even if the user contacts the area where the background  123  of the LCD  120  is displayed through the touch panel  130 . 
       FIG. 2  is a block diagram showing a functional configuration of the portable terminal  100  according to the first embodiment of the present disclosure. Referring to  FIG. 2 , the portable terminal  100  includes the LCD  120 , the touch panel  130 , an acceleration sensor  140 , a CPU (Central Processing Unit)  150 , a storage unit  160 , and a communication unit  170 . In addition, the CPU  150  realizes functions of an inclination acquisition unit  151 , a contact acquisition unit  152 , a shaking acquisition unit  153 , a display control unit  154 , and a suppression control unit  155 . 
     Since each of the functions of the LCD  120  and the touch panel  130  has been described before referring to  FIG. 1 , detailed description thereof will be omitted, but herein, description will be provided in relation to other function configurations. A display image is provided to the LCD  120  by the CPU  150 . The touch panel  130  provides the CPU  150  with the presence of user contact with the LCD  120 , and information of a position where the user contact on the LCD  120 . 
     The acceleration sensor  140  is a sensor that senses the acceleration applied to the housing  110  of the portable terminal  100 . The information of acceleration that the acceleration sensor  140  senses is provided to the CPU  150 . With a change in acceleration, it is possible to detect a change in the state of the housing  110 , for example, inclination, shaking, and the like of the housing  110 . Furthermore, the acceleration sensor  140  can be an acceleration sensor of any type, for example, a two-axis acceleration sensor, a three-axis acceleration sensor, or the like, according to the change type of the state of the housing  110  necessary for a process in the CPU  150 . In addition, other sensors that can detect a change in the state of the housing  110  as described above may be used instead of the acceleration sensor  140 . 
     The CPU  150  controls the operation of each part of the portable terminal  100 . The CPU  150  is a processor that executes programs stored in the storage unit  160 , and realizes functions of the inclination acquisition unit  151 , the contact acquisition unit  152 , the shaking acquisition unit  153 , the display control unit  154 , and the suppression control unit  155  by executing the programs. In addition to these functions, the CPU  150  realizes various functions that the portable terminal  100  can have, for example, voice calling, network communication, music and video reproduction, capturing moving and still images, and the like. In order to realize these functions, the CPU  150  acquires information from the touch panel  130  and the acceleration sensor  140 , provides images to the LCD  120 , and exchanges data with the storage unit  160  and the communication unit  170 . In addition, the CPU  150  may acquire or provide information from or with other devices that the portable terminal  100  has, in order to realize the functions. 
     Hereinbelow, functions of the inclination acquisition unit  151 , the contact acquisition unit  152 , the shaking acquisition unit  153 , the display control unit  154 , and the suppression control unit  155  realized by the CPU  150  will be described. The functions can be realized by the CPU  150  executing the programs stored in the storage  160  as described above, but it is not limited thereto, and all or some of the functions may be realized by a dedicated circuit configuration provided separately from, for example, the CPU  150 . 
     The inclination acquisition unit  151  acquires inclination of the housing  110  based on information of acceleration of the housing  110  of the portable terminal  100  provided from the acceleration sensor  140 . Specifically, the inclination acquisition unit  151  may calculate the direction and angle of the inclination of the housing  110  based on the direction and magnitude of the acceleration of the housing  110 . The inclination acquisition unit  151  may provide the calculated direction and angle of the inclination of the housing  110  to the display control unit  154  and the suppression control unit  155 . 
     The contact acquisition unit  152  acquires information of the presence of user contact with the LCD  120  and the position where the user contacts the LCD  120 , which is provided from the touch panel  130 . For example, the contact acquisition unit  152  may acquire the contact with an area where the icon  121  on the LCD  120  is displayed as a pressing operation to the icon  121 . In addition, the contact acquisition unit  152  may acquire the contact as a long-pressing operation to the icon  121  when the contact with the area where the icon  121  on the LCD  120  is displayed is continued over a predetermined time period. Furthermore, the contact acquisition unit  152  may acquire the contact as an operation of a movement (also referred to as a flicking operation) when the contact position is moved in the state where the contact is continued on the LCD  121 . The contact acquisition unit acquires a pressing operation, a long-pressing operation, or a movement operation for the icon  121 , and may provide the operation to the display control unit  154  and the suppression control unit  155 . 
     The shaking acquisition unit  153  acquires the shaking of the housing  110  based on the information of the acceleration of the housing  110  of the portable terminal  100  provided from the acceleration sensor  140 . Specifically, the shaking acquisition unit  153  may acquire that there was the shaking of the housing  110  based on a change in the acceleration of the housing  110  within a predetermined time. The shaking acquisition unit  153  acquires that there was the shaking of the housing  110 , and may provide the information to the display control unit  154  and the suppression control unit  155 . Optionally, when the shaking acquisition unit  153  detects shaking of the housing, a zero point adjustment is made to the inclination angle of the housing (e.g., reset or recalibrate the angle at which the housing is deemed to not be inclined). 
     The display control unit  154  provides the image to the LCD  120 . In addition, the display control unit  154  makes a display change in the icon  121 , the icon shadow  122 , or the background  123  included in the display image. Herein, the display control unit  154  may make the display change in a part or all of the inclination of the housing  110  acquired by the inclination acquisition unit  151 , various contact operations acquired by the contact acquisition unit  152 , and the shaking of the housing  110  acquired by the shaking acquisition unit  153 . The display change includes at least a first display change and a second display change according to the inclination of the housing  100  acquired by the inclination acquisition unit  151 . Furthermore, there is a case where the display control unit  154  suppresses the first display change with the action of the suppression control unit  155 . Specifically what kind of display change the first and the second display changes are and what kind of a case the first and the second display changes are made will be described later. 
     The suppression control unit  155  suppresses the first display change that the display control unit  154  makes to the icon  121 , the icon shadow  122 , or the background  123  displayed on the LCD  120 . The suppression control unit  155  may suppress the first display change based on a part or all of the inclination of the housing  110  acquired by the inclination acquisition unit  151 , various contact operations acquired by the contact acquisition unit  152 , and the shaking of the housing  110  acquired by the shaking acquisition unit  153 . Specifically what kind of a case the suppression control unit  155  restricts the first display change will be described later. 
     The storage unit  160  temporarily or permanently stores various data relating to the process of the portable terminal  100 . The storage unit  160  may be, for example, a semiconductor memory such as a flash ROM (Read Only Memory) or a DRAM, an optical disc such as a BD (Blu-ray Disc), a DVD (Digital Versatile Disc), or a CD (Compact Disc), a hard disk, or the like. The storage unit  160  may be a storage device built in the portable terminal  100  or a removable medium such as a memory card that can be loaded or unloaded on the portable terminal  100 . In addition, the storage unit  160  may include a plurality of types of storage devices or a removable medium. The storage unit  160  can store programs executed by the CPU  150  in order to realize functions of the inclination acquisition unit  151 , the contact acquisition unit  152 , the shaking acquisition unit  153 , the display control unit  154 , and the suppression control unit  155 , and other various functions. The programs may be stored in the storage unit  160  in advance, and may be programs provided by being stored in the removable medium or programs downloaded from a network through the communication unit  170  which are temporarily stored in the storage unit  160 . Furthermore, the storage unit  160  can temporarily store information exchanged by the CPU  150  with the LCD  120 , the touch panel  130 , the acceleration sensor  140  and the communication unit  170 , and information generated by the CPU  150  in the course of a process. 
     The communication unit  170  is a communication interface including a communication device for connecting to a network. The communication unit  170  can be a port or a communication card for, for example, a USB (Universal Serial Bus), an IEEE 1394, an SCSI (Small Computer System Interface), an HDMI (High-Definition Multimedia Interface), a LAN (Local Area Network), a Bluetooth (registered trademark), a WUSB (Wireless USB), or the like. The communication unit  170  is connected to a network such as the Internet, a household LAN, infrared communication, radio wave communication, satellite communication or the like, and exchanges various data regarding the process of the portable terminal  100 . The communication unit  170  may download a program executed by the CPU  150  for realizing the functions of the inclination acquisition unit  151 , the contact acquisition unit  152 , the shaking acquisition unit  153 , the display control unit  154 , and the suppression control unit  155 , and other various functions from a network and store the program in the storage unit  160 . 
     (Operation of Portable Terminal) 
       FIG. 3  is a diagram showing an operation example of the portable terminal  100  according to the first embodiment of the present disclosure.  FIG. 3  shows changes in display positions of the icon  121  and the icon shadow  122  when the housing  110  of the portable terminal  100  is not inclined, and when the angle of inclination is an angle a 1 , and when the angle of further inclination is an angle a 2  in the case where the housing is inclined. Furthermore, the angle a 2  is an angle greater than the angle a 1 . 
     When the housing  110  is not inclined, each icon  121  is arrayed at a position with substantially the same intervals in the upper, lower, right and left sides as shown in the drawing. The display position of the icon shadow  122  is a position displaced in the direction toward the periphery from the center of the display unit  120  for each icon  121 . 
     When the housing  110  is inclined and the angle of the inclination is the angle a 1 , the display position of the icon  121  does not move while being left at the display position in the state where the housing  110  is not inclined. On the other hand, the display position of the icon shadow  122  moves to the right side of the display unit  120 , and is at a position displaced in the right side of each icon  121 . The movement of the display position of the icon shadow  122  may be a movement according to the inclination of the housing  110 . Furthermore, the display position of the icon  121  may move slightly to the right side of the display unit  120 , not staying still, as described below. 
     When the housing  110  is further inclined to form the angle a 2  as the angle of the inclination, the display position of the icon  121  moves to the right side of the display unit  120 . On the other hand, the display position of the icon shadow  122  further moves to the right side of the display unit  120  from the state where the housing  110  is inclined by the angle a 1 . The movement of both display positions of the icon  121  and the icon shadow  122  as above can be movements corresponding to the movement of the housing  110 . 
     At this time, a process responding to the inclination of the housing  110  may be further executed. The process may be a process in which a new icon  121  appears on the display unit  120 , the icon  121  that has already been displayed is erased from the display unit  120 , or the size of the displayed icon  121  changes. In addition, the process may not necessarily relate to a display change, and can be various kinds of processes that the portable terminal  100  can execute. 
     With the operation of the portable terminal  100  as described above, the movements of the icon  121  and the icon shadow  122  displayed on the display unit  120  when the housing  110  is gradually inclined can be observed by the user in such a way that, for example, the icon shadow  122  starts to move to the right side of the display unit  120  first, and the icon  121  starts to move to the right side later. 
     Furthermore, the arrangement of the icon  121  and the icon shadow  122  in the example shown in the drawing is just an example. The display position of the icon shadow  122  when the housing  110  is not inclined is not limited to the above example, and may be, for example, a position displaced to a different direction from the icon  121 . In addition, as the display position of the icon shadow  122  when the housing  110  which is not inclined overlaps the icon  121 , the icon shadow  122  after the housing  110  starts inclining may be displayed to be observed by the user. 
     In addition, in the above example, both display positions of the icon  121  and the icon shadow  122  move to the right side of the display unit  120  so as to rebound on the inclination of the housing  110 , but the direction in which the display positions of the icon  121  and the icon shadow  122  move is not limited to the example. The display positions of the icon  121  and the icon shadow  122  may move, for example, to the left side of the display unit  120  as if the positions slide down by the inclination of the housing  110 . Furthermore, it is needless to say that the direction of the display positions of the icon  121  and the icon shadow  122  is determined according to the direction in which the housing  110  is inclined. 
     In the portable terminal  100  that is operated as above, when the angle of inclination of the housing  110  is in the range including the angle a 1 , the “movement of the display position of the icon  121 ” that is the first display change that the display control unit  154  gives to the display image in the embodiment is suppressed by the suppression control unit  155 . In addition, while the movement of the display position of the icon  121  is suppressed as such, “movement of the display position of the icon shadow  122 ” that is the second display change in the embodiment is executed by the display control unit  154 . 
     (Process in Portable Terminal) 
       FIG. 4  is a flowchart showing a process in the portable terminal  100  according to the first embodiment of the present disclosure.  FIG. 4  shows a process of the portable terminal  100  according to the embodiment for executing a display change and a process according to the inclination of the housing  110  acquired by the inclination acquisition unit  151 . 
     First, in Step S 101 , the display control unit  154  determines whether or not the inclination of the housing  110  is acquired by the inclination acquisition unit  151 . When the inclination of the housing  110  is acquired here, the process advances to Step S 103 . On the other hand, when the inclination of the housing  110  is not acquired, the process returns to the start. 
     In Step S 103 , the display control unit  154  causes the display position of the icon shadow  122  displayed on the display unit  120  to move according to the inclination of the housing  110  acquired by the inclination acquisition unit  151 . Furthermore, as described above, the movement of the display position of the icon shadow  122  is the second display change that the display control unit  154  brings about to the display image. 
     Successively in Step S 105 , the suppression control unit  155  determines whether or not the angle of the inclination of the housing  110  acquired by the inclination acquisition unit  151  is equal to or smaller than a first threshold value. When the angle of the inclination of the housing  110  is equal to or smaller than the first threshold value here, the suppression control unit  155  ends the series of process. On the other hand, when the angle of the inclination of the housing  110  exceeds the first threshold value, the process advances to Step S 107 . Furthermore, the first threshold value is a predetermined threshold value set for the inclination of the housing  110 . In the example shown in  FIG. 3 , for example, the first threshold value is a value greater than the angle a 1  and equal to or smaller than the angle a 2 . 
     In Step S 107 , the display control unit  154  causes the display position of the icon  121  displayed on the display unit  120  to move according to the inclination of the housing  110  acquired by the inclination acquisition unit  151 . Furthermore, as described above, the movement of the display position of the icon  121  is the first display change that the display control unit  154  brings about to the display image. 
     Successively in Step S 109 , the CPU  150  determines whether or not a process corresponding to the inclination of the housing  110  acquired by the inclination acquisition unit  151  is set. When a process corresponding to the inclination is set here, the process advances to Step S 111 . On the other hand, when a process corresponding to the inclination is not set, the process returns to the start. 
     In Step S 111 , the CPU  150  executes the process corresponding to the inclination of the housing  110  acquired by the inclination acquisition unit  151 . The process is not necessarily limited to the process of display changes by the display control unit  154 , and may be another type of process that the portable terminal  100  can execute. A process that the display control unit  154  can execute here can be a process in which, for example, a new icon  121  appears on the display unit  120 , an icon  121  that has already been displayed is erased from the display unit  120 , the size of a displayed icon  121  changes, or the like. In addition, as another process that the portable terminal  100  can execute, there may be a process relating to, for example, voice calling, network communications, music and video reproduction, capturing moving or still images, or the like. 
     In the above-described process of the portable terminal  100 , when the angle of the inclination of the housing  110  acquired by the inclination acquisition unit  151  is equal to or smaller than the first threshold value, the process ends by the suppression control unit  155 . Accordingly, the “movement of the display position of the icon  121 ” that is the first display change that the display control unit  154  brings about to the display screen is not executed in that case. In other words, when the angle of the inclination of the housing  110  is equal to or smaller than the first threshold value, the “movement of the display position of the icon  121 ” that is the first display change is suppressed. 
     On the other hand, in the above-described process of the portable terminal  100 , even when the angle of the inclination of the housing  110  acquired by the inclination acquisition unit  151  is equal to or smaller than the first threshold value, the “movement of the display position of the icon shadow  122 ” that is the second display change that the display control unit  154  brings about to the display screen is executed. In other words, while the “movement of the display position of the icon  121 ” that is the first display change is suppressed, the “movement of the display position of the icon shadow  122 ” that is the second display change is executed. 
     (Regarding Suppression of Display Change) 
       FIG. 5  is a diagram illustrating the definition of “suppression of the first display change” in the embodiment of the present disclosure. Referring to  FIG. 5 , the horizontal axis represents the inclination angle a of the housing  110 , the vertical axis represents the quantity of a display change b, and an example of a function f 1  showing the relationship between the inclination angle a and the quantity of a display change b in the first display change and of a function f 2  showing the relationship between the inclination angle a and the quantity of a display change b in the second display change is shown. In the inclination angle a of the housing, two threshold values of a th1  and a th2  each corresponding to two definitions of “suppression of the first display change” are shown. 
     In the example shown in the drawing, when the inclination angle a is equal to or smaller than the threshold value a th1 , the value of the quantity of a display change b of the function f 1  is substantially 0. In a first definition, a state where the value of the quantity of a display change b of the function f 1  is substantially 0 is defined as “a state where the first display change is suppressed”. In this case, the “threshold value” is the threshold value a th1 . As a first example of the display control in the first definition, the suppression control unit  155  of the portable terminal  100  may suppress the first display change by nullifying the inclination of the housing  110  acquired by the inclination acquisition unit  151  when the inclination angle a is equal to or smaller than the threshold value a th1 . In addition, as a second example, the first display change may be suppressed in a way that the display control unit  154  calculates the quantity of a display change b with an arithmetic operation of b=c tan a for the first display change from the inclination angle a of the housing  110  acquired by the inclination acquisition unit  151  and the suppression control unit  155  sets a value of coefficient c so that the quantity of a display change b becomes substantially 0 when the inclination angle a is equal to or smaller than the threshold value a th1 . 
     On the other hand, in the example shown in the drawing, when the inclination angle a is equal to or smaller than threshold value a th2  a value of the quantity of a display change b of the function f 1  is lower than a value of the quantity of a display change b of the function f 2 . In the second definition, the state where a value of the quantity of a display change b of the function f 1  is lower than a value of the quantity of a display change b of the function f 2  is defined as a “state where the first display change is suppressed”. In this case, the above-described “threshold value” is the threshold value a th2 . As an example of display control in the second definition, the first display change may be suppressed in a way that the display control unit  154  calculates the quantity of a display change b with arithmetic operations of b=c tan a for the first display change and b=da for the second display change from the inclination angle a of the housing  110  acquired by the inclination acquisition unit  151  and the suppression control unit  155  sets values of coefficients c and d so that a value of the quantity of a display change b of the function f 1  is lower than a value of the quantity of a display change b of the function f 2  when the inclination angle a is equal to or smaller than the threshold value a th2 . 
     Herein, the operation of the portable terminal  100  described with reference to  FIGS. 3 and 4  above is based on the first definition. As described above, however, the “suppression of the first display change” of the present specification includes at least two definitions of the first and the second ones. For that reason, the operation of the portable terminal  100  as shown in  FIG. 3  may be realized based on the second definition. In this case, the portable terminal  100  is in the state where the housing  110  is inclined by the angle a 1 , and the display position of the icon  121  may move to the slightly right side of the display unit  120  instead of not moving while being in the display position in the case where the housing  110  is not inclined. 
     Furthermore, as shown in  FIG. 4 , the display control unit  154  may apply another control to the quantity of a display change b of the first display change by setting the quantity of a display change b to a constant value when the inclination angle a exceeds a predetermined value. When the inclination angle a exceeds the threshold value a th1  or the threshold value a th2  and continues to increase, the display control unit  154  may control such that a value of the quantity of a display change b of the function f 1  exceeds a value of the quantity of a display change b of the function f 2  first and then a value of the quantity of a display change b of the function f 2  exceeds a value of the quantity of a display change b of the function f 1 . In addition, in the same case, a value of the quantity of a display change b of the function f 1  and a value of the quantity of a display change b of the function f 2  may be controlled to be substantially the same value. 
     (Modified Example 1) 
       FIG. 6  is a diagram illustrating a modified example of the portable terminal  100  according to a modified example of the first embodiment of the present disclosure.  FIG. 6  shows a change in the display position of a glossy portion  124  when the state of portable terminal  100  changes from the state where the housing  110  is not inclined to the state where the housing  110  is inclined by the angle a 1 . Furthermore, as described above, the angle a 1  is an angle smaller than the first threshold value at which the movement of the display position of the icon  121  is suppressed for the inclination of the housing  110 . 
     In the modified example, the icon  121  is displayed as an object in a flat spherical shape of which the surface bulges. The glossy portion  124  of the icon is displayed as an area on the surface of the icon  121  on which light is reflected to change the color in order to, for example, express a stereoscopic effect of the icon  121 . 
     When the housing  110  is inclined and the angle of the inclination is the angle a 1 , the display position of the icon  121  does not move while being in the display position in the state where the housing  110  is not inclined. On the other hand, the display position of the glossy portion  124  of the icon moves on the surface of the icon  121  clockwise from the display position in the state where the housing  110  is not inclined and is in a position where the display position of the glossy portion  124  moves to the slightly right side of the display unit  120 . In the modified example, the second display change by the display control unit  154  is the movement of the display position of the glossy portion  124  of the icon. The movement of the display position of the glossy portion  124  of the icon may be a movement according to the inclination of the housing  110 . Furthermore, as described above, the display position of the icon  121  does not stay still, but may move to the slightly right side of the display unit  120 . 
     Although not shown in the drawing, when the housing  110  is further inclined and the angle of the inclination is the angle a 2 , the movement of the display position of the icon  121  and the further movement of the glossy portion  124  of an icon are the same as in the operation example of the present embodiment described with reference to  FIG. 3 . 
     (Modified Example 2) 
       FIG. 7  is a diagram illustrating another modified example of the portable terminal  100  according to the modified example of the first embodiment of the present disclosure.  FIG. 7  shows a change in the display of the background  123  when the state of the portable terminal  100  changes from the state where the housing  110  is not inclined and to the state where the housing  110  is inclined by the angle a 1 . Furthermore, as described above, the angle a 1  is an angle smaller than the first threshold value at which the movement of the display position of the icon  121  is suppressed for the inclination of the housing  110 . 
     In the modified example, the background  123  has a pattern of a radial shape and a concentric shape as shown in the drawing. The pattern can be stereoscopically drawn as an inner face of a virtual hemisphere face. Furthermore, the pattern is an example for making a change in the display of the background  123  in the modified example easily understood. The pattern of the background  123  may be any pattern with which a change in the display as in the modified example can be recognized. 
     When the housing  110  is inclined and the angle of the inclination is the angle a 1 , the display position of the icon  121  does not move while being in the display position in the state where the housing  110  is not inclined. On the other hand, the background  123  changes so that the virtual hemisphere face rotates from the display of the state where the housing  110  is not inclined, and the displayed pattern turns into a different pattern. In the modified example, the second display change by the display control unit  154  is a change in the display of the background  123 . The change of the display of the background  123  may be movement according to the inclination of the housing  110 . Furthermore, as described above, the display position of the icon  121  does not stand still, but may move to the slightly right side of the display unit  120 . 
     Although not shown in the drawing, when the housing is further inclined and the angle of the inclination is the angle a 2 , a movement of the display position of the icon  121  and a further change in the display of the background  123  are the same as in the operation example of the embodiment described with reference to  FIG. 3 . 
     (Summary of First Embodiment) 
     In the first embodiment of the present disclosure described above, there is provided the portable terminal  100  including the inclination acquisition unit  151  which acquires inclination of the housing  110  provided with the LCD  120  on which an image is displayed, the display control unit  154  which gives the first and the second display changes to the displayed image according to the acquired inclination of the housing  110 , and the suppression control unit  155  which suppresses the first display change. 
     As described above, in the embodiment, the first display change is the movement of the display position of the icon  121  that is an object included in the images displayed on the LCD  120 . The second display change is the movement of the display position of the icon shadow  122 . As described as the modified examples, the second display change may be the movement of the display position of the glossy portion  124  of the icon and a change in the background  123  of the image displayed on the LCD  120 . Furthermore, the second display change may be a change in display in which the above changes are combined. 
     According to the configuration, when it is desired that the display position of the icon  121  does not move even though the housing  110  of the portable terminal  100  is inclined, for example, when the angle of the inclination of the housing  110  is equal to or smaller than a predetermined threshold value, the movement of the display position of icon  121  by the inclination of the housing  110  is suppressed. For this reason, it is possible to prevent a change in the display position of the icon  121  that the user does not want. On the other hand, while the movement of the display position of the icon  121  is suppressed, the display position of the icon shadow  122  moves. With the movement of the display position of the icon shadow  122  that is the second display change, the user can be made aware that the display position of the icon  121  can be moved by the inclination of the housing  110 . In other words, when there is no movement of the icon  121  even though the housing  110  is inclined, the user can be made aware that this is not because the portable terminal  100  is not responding to the inclination of the housing  110 , but the movement of the icon  121  is suppressed due to a predetermined condition, for example, a condition that the angle of the inclination of the housing  110  is equal to or smaller than a predetermined threshold value. 
     In the embodiment, when the inclination of the housing  110  acquired by the inclination acquisition unit  151  is equal to or smaller than the first threshold value, the movement of the display position of the icon  121  may be suppressed. With the configuration, it is possible to hinder the movement of the icon  121  by a trivial change in the user&#39;s posture when the user holds the portable terminal  100 , in opposition to the user&#39;s intention. 
     In addition, in the embodiment, the movement of the display position of the icon shadow  122  that is the second display change may be a display change according to the inclination of the housing  110  acquired by the inclination acquisition unit  151 . With the configuration, it is possible to give an intuitive hint to the user that the display position of the icon  121  can be moved by the inclination of the housing  110 . 
     2. Second Embodiment 
     Subsequently, a second embodiment of the present disclosure will be described. Furthermore, since the configuration of the portable terminal  100  is substantially the same in the second and the first embodiment, detailed description thereof will be omitted. 
     (Operation of Portable Terminal) 
       FIG. 8  is a diagram showing an operation example of the portable terminal  100  according to the second embodiment of the present disclosure.  FIG. 8  shows changes of the display position of the icon  121  when the housing  110  of the portable terminal  100  is not inclined, when the angle of the inclination is an angle a when the housing  110  is inclined, and when a predetermined time passes after the angle of the inclination is the angle a. 
     When the housing  110  is not inclined, each icon  121  is arrayed at a position with substantially the same intervals in the upper, lower, right and left sides as shown in the drawing. The display position of the icon shadow  122  is a position displaced in the direction toward the periphery from the center of the display unit  120  for each icon  121 . 
     When the housing  110  is inclined and the angle of the inclination is the angle a, the display position of the icon  121  first moves to the right side of the display unit  120  from the display position of the state where the housing  110  is not inclined. Furthermore, in this case, the icon shadow  122  may move to the right side of the display unit  120  to be displayed at a position displaced to the right side of each icon  121 . 
     When a predetermined time passes after the angle of the inclination of the housing  110  is the angle a, the display position of the icon  121  returns to the display position of the state where the housing  110  is not inclined again from the position in which the display position of the icon  121  moved at the first. Furthermore, in this case, the icon shadow  122  may be continuously displayed at a position displaced to the right side of each icon  121 . 
     The movement of the icon  121  displayed on the display unit  120  when a predetermined time passes in the state where the housing  110  is inclined by the operation of the portable terminal  100  as above is observed by the user as a movement that the icon  121  first moves in the direction in which the icon  121  is assumed to move when, for example, the housing  110  is inclined, and then returns to the original position. 
     Furthermore, the arrangement of the icon  121  in the example shown in the drawing is just an example. In addition, in the above example, all display positions of the icon  121  move to the right side of the display unit  120  so as to rebound on the inclination of the housing  110 , but the direction in which the display positions of the icon  121  moves is not limited thereto. For example, the display position of the icon  121  may move to the left side of the display unit  120  when there is the same inclination of the housing  110  as in the example shown in the drawing. Furthermore, it is needless to say that the direction in which the display position of the icon  121  moves is determined according to the direction in which the housing  110  is inclined. 
     In the portable terminal  100  that operates as above, the “movement of the display position of the icon  121 ” that is the first display change that the display control unit  154  brings about to the display image in the embodiment is suppressed by the suppression control unit  155  due to a predetermined condition. In addition, while the movement of the display position of the icon  121  is suppressed as above, “the display position of the icon  121  moves first and returns” that is the second display change in the embodiment is executed by the display control unit  154 . 
     Herein, the predetermined condition with which the suppression control unit  155  suppresses the “movement of the display position of the icon  121 ” that is the first display change may be, for example, acquisition of a user&#39;s contact with the display unit  120  by the contact acquisition unit  152 . In addition, the predetermined condition may be that an angle a of the inclination of the housing  100  is equal to or smaller than a predetermined threshold value. In addition, the predetermined condition may be setting of the portable terminal  100  so that a display change by inclination is nullified. 
     (Process in Portable Terminal) 
       FIG. 9  is a flowchart showing a process in the portable terminal  100  according to the second embodiment of the present disclosure.  FIG. 9  shows a process of the portable terminal  100  according to the embodiment for executing a display change and a process according to the inclination of the housing  110  acquired by the inclination acquisition unit  151 . In the example shown in the drawing, a predetermined condition with which the suppression control unit  155  suppresses a movement of the display position of the icon  121  is acquisition of a user&#39;s contact with the display unit  120  by the contact acquisition unit  152 . 
     First, in Step S 201 , the display control unit  154  determines whether or not the inclination of the housing  110  is acquired by the inclination acquisition unit  151 . When the inclination of the housing  110  is acquired here, the process advances to Step S 203 . On the other hand, when the inclination of the housing  110  is not acquired, the process returns to the start. 
     In Step S 203 , the suppression control unit  155  determines whether or not a user&#39;s contact with the display unit  120  is acquired by the contact acquisition unit  152 . When the user&#39;s contact with the display unit  120  is acquired here, the process advances to Step S 205 . On the other hand, when the user&#39;s contact with the display unit  120  is not acquired, the process advances to Step S 107 . 
     In Step S 205 , the display control unit  154  causes the display position of the icon  121  to move first and to return. Furthermore, as described above, that the display position of the icon  121  moves first and returns is the second display change that the display control unit  154  brings about to the display image. 
     Furthermore, since the process of Steps S 107  to S 111  is the same as that in the first embodiment described above referring to the same reference numerals in  FIG. 4  detailed description thereof is omitted. 
     When the user&#39;s contact with the display unit  120  is acquired by the contact acquisition unit  152  in the above process of the portable terminal  100 , the same second display change of “the display position of the icon  121  is caused to move first and return” is executed instead of executing the first display change of the “movement of the display position of the icon  121 ” that the display control unit  154  brings about to the display screen. In other words, when the user&#39;s contact with the display unit  120  is acquired by the contact acquisition unit  152 , the second display change of “the display position of the icon  121  is caused to move first and return” is executed while the first display change of the “movement of the display position of the icon  121 ” is suppressed. 
     (Summary of Second Embodiment) 
     In the second embodiment of the present disclosure described above, the portable terminal  100  is further provided with the contact acquisition unit  152  which acquires a user&#39;s contact with the LCD  120 , and the suppression control unit  155  suppresses the first display change when the contact is acquired. 
     As described above, in the embodiment, the first display change is a movement of the display position of the icon  121  that is an object included in an image displayed on the LCD  120 . The second display change is that the display position of the icon  121  is caused to move first and return. 
     With the configuration, for example, when a user performs a contact operation to the icon  121  displayed on the LCD  120  of the portable terminal  100 , a movement of the display position of the icon  121  by inclination of the housing  110  is suppressed. For that reason, even when the user who is performing the contact operation inclines the housing  110  without intention, it is possible to prevent an erroneous operation resulting from the movement of the display position of the icon  121 . In addition, it is possible to intentionally suppress a movement of the display position of the icon  121  by inclination of the housing  110  in a way that the user contacts an area where the background  123  is displayed and an operation instruction to the portable terminal  100  is not given even with a user&#39;s contact. For example, when the user changes a way of holding the portable terminal  100 , it is possible to prevent an unintended movement of the display position of the icon  121  caused by inclination of the housing  110  when the way of holding is changed, by changing the way of holding while contacting the area where the background  123  is displayed. 
     3. Third Embodiment 
     Subsequently, a third embodiment of the present disclosure will be described. Furthermore, since the configuration of the portable terminal  100  and the display change that the display control unit  154  brings about to the display screen in the third embodiment are substantially the same as those in the first embodiment, detailed description thereof will be omitted. 
     (Process in Portable Terminal) 
       FIG. 10  is a flowchart showing a process in the portable terminal  100  according to the third embodiment of the present disclosure.  FIG. 10  shows a process of the portable terminal  100  according to the present disclosure for executing a display change and a process according to inclination of the housing  110  acquired by the inclination acquisition unit  151 . In the example shown in the drawing, when the duration of a user&#39;s contact with the display unit  120  is equal to or longer than the second threshold value, the contact acquisition unit  152  acquires the contact as a long-pressing operation. 
     First, in Step S 301 , the contact acquisition unit  152  determines whether or not the continued contact of the user with the display unit  120  is detected by the touch panel  130 . When the continued contact of the user with the display unit  120  is detected here, the process advances to Step S 303 . On the other hand, when the continued contact of the user with the display unit  120  is not detected, the process advances to S 309 . 
     In Step S 303 , the inclination acquisition unit  151  records the angle of the inclination of the housing  110  at the time as a reference angle. 
     Successively in Step S 305 , the contact acquisition unit  152  determines whether or not the duration of the user&#39;s contact with the display unit  120  that has been detected by the touch panel  130  is equal to or longer than the second threshold value. When the duration of the user&#39;s contact with the display unit  120  is equal to or longer than the second threshold value, the process advances to Step S 307 . On the other hand, when the duration of the user&#39;s contact with the display unit  120  does not satisfy the second threshold value, the process advances to Step S 309 . 
     In Step S 307 , the CPU  150  executes a process corresponding to a long-pressing operation of the display unit  120  acquired by the contact acquisition unit  152 . The process can be a process relating to other kinds of process that the portable terminal  100  can execute, for example, voice calling, network communication, music and video reproduction, capturing moving and still images, or the like, in addition to a process of a display change by the display control unit  154 . 
     In Step S 309 , the suppression control unit  155  determines whether or not the angle of the inclination of the housing  110  acquired by the inclination acquisition unit  151  is equal to or smaller than the first threshold value. When the angle of the inclination of the housing  110  is equal to or smaller than the first threshold value, the process advances to Step S 305 , and determines again whether or not the duration of the user&#39;s contact with the display unit  120  is equal to or longer than the second threshold value. On the other hand, when the angle of the inclination of the housing  110  exceeds the first threshold value, the process advances to Step S 107 . 
     Furthermore, the process of Steps S 107  to S 111  is substantially the same as the process in the first embodiment described above referring to the same reference numerals in  FIG. 4 , detailed description thereof will be omitted. 
     In the process of the portable terminal  100 , when the angle of the inclination of the housing  110  acquired by the inclination acquisition unit  151  is equal to or smaller than the first threshold value, acquisition of the user&#39;s continued contact with the display unit  120  by the contact acquisition unit  152  continues, and when the duration of the contact is equal to or longer than the second threshold value, the contact acquisition unit  152  acquires the contact as a long-pressing operation. On the other hand, when the angle of the inclination of the housing  110  acquired by the inclination acquisition unit  151  exceeds the first threshold value before the duration of the contact is equal to or longer than the second threshold value, a process corresponding to the inclination of the housing  110  is executed. In this case, the contact that the contact acquisition unit  152  acquires is not acquired by a long-pressing operation. In other words, when the angle of the inclination of the housing  110  exceeds the first threshold value, the acquisition of the long-pressing operation by the contact acquisition unit  152  is suppressed, instead of cancelling suppression of the “movement of the display position of the icon  121 ” that is the first display change. 
     (Summary of Third Embodiment) 
     In the third embodiment of the present disclosure described above, the portable terminal  100  further includes the contact acquisition unit  152  which acquires contact when the duration of the user&#39;s contact with the LCD  120  is equal to or longer than the second threshold value, as a long-pressing operation, and the suppression control unit  155  suppresses the acquisition of long-pressing operation when the acquired angle of inclination of the housing  110  exceeds the first threshold value before the duration of the acquired contact is equal to or longer than the second threshold value. 
     As described above, in the embodiment, the first display change is a movement of the display position of the icon  121  that is an object included in the image displayed on the LCD  120 . 
     With the configuration, for example, when the angle of the inclination of the housing  110  exceeds a predetermined threshold value in which the display position of the icon  121  starts moving before the duration of the user&#39;s contact operation to the icon  121  displayed on the LCD  120  of the portable terminal  100  exceeds the predetermined threshold value with which the operation is determined to be a long-pressing operation, acquisition of the user&#39;s contact operation is cancelled. For that reason, even when the user performing a long-pressing operation for the icon  121  unintentionally inclines the housing  110 , it is possible to prevent an erroneous operation caused by moving the display position of the icon  121 . 
     4. Fourth Embodiment 
     Subsequently, a fourth embodiment of the present disclosure will be described. Furthermore, since the configuration of the portable terminal  100  in the fourth embodiment is substantially the same as that in the first embodiment, detailed description thereof will be omitted. 
     (Operation of Portable Terminal) 
       FIG. 11  is a diagram showing an operation example of the portable terminal  100  according to the fourth embodiment of the present disclosure.  FIG. 11  shows changes in the display position of the icon  121  in the state where the housing  110  of the portable terminal  100  is not inclined, where the angle of the inclination is an angle a when the housing is inclined and a movement operation (flicking operation) on the touch panel  130  is performed, and where operations of movement and inclination are ended. 
     The LCD  120  displays the screen of the received e-mail list. The screen of the received e-mail list includes a deletion mark  121   a  for selecting an e-mail to be deleted, and a delete button  121   b . In the state where the housing  110  is not inclined, however, the deletion mark  121   a  and the delete button  121   b  are not displayed on the LCD  120 . Furthermore, the deletion mark  121   a  and the delete button  121   b  are objects that can be displayed on the LCD  120  in the embodiment. 
     Herein, when a user inclines the housing  110  by the angle a and performs a movement operation (flicking operation) for the touch panel  130  to the right direction of the LCD  120 , the screen of the received e-mail list displayed on the LCD  120  moves to the right side of the LCD  120 , and the deletion mark  121   a  appears from the left edge of the LCD  120 . 
     The deletion mark  121   a  is displayed on the left edge of the LCD  120  in a state where the above operation is ended. The user can switch a selection state and a non-selection state of, for example, the deletion mark  121   a  by contacting a portion of the deletion mark  121   a  of the touch panel  130 . 
     Furthermore, in the embodiment, the suppression control unit  155  suppresses a movement of the display position of the deletion mark  121   a  by the display control unit  154  when the contact acquisition unit  152  does not acquire the movement operation of the user to the touch panel  130  even when the inclination of the housing  110  is acquired by the inclination acquisition unit  151 . 
     In the portable terminal  100  that operates as above, a “movement of the display position of the deletion mark  121   a ” that is a first display change that the display control unit  154  brings about to the display image in the embodiment is suppressed in cases other than the case where contact acquired by the contact acquisition unit  152  is a movement operation (flicking operation) of the deletion mark  121   a . Furthermore, the delete button  121   b  can be displayed on the LCD  120  in the same manner as the deletion mark  121   a  by inclining the housing  110  in, for example, the opposite direction to the example shown in the drawing and performing a movement operation through the touch panel  130 . 
     (Summary of Fourth Embodiment) 
     In the fourth embodiment of the present disclosure described above, the portable terminal  100  further includes the contact acquisition unit which acquires a user&#39;s contact with the LCD  120  as an operation instruction, and the suppression control unit  155  suppresses the first display change in cases other than a case where the acquired contact is a movement operation for an object. 
     As described above, in the embodiment, the first display change is a movement of the display position of the icon  121  that is an object included in the image displayed on the LCD  120 . 
     The configuration can be applied to, for example, a case where objects such as the deletion mark  121   a , the delete button  121   b  of content, and the like, an erroneous operation of which causes a significant influence are included in the screen displayed on the LCD  120 . In this case, the objects including the deletion mark  121   a  are arranged at first outside the area displayed on the LCD  120 . When a user inclines the housing  110 , and then performs a movement operation (flicking operation) through the touch panel  130 , the display position of the deletion mark  121   a  is moved and the deletion mark appears on the LCD  120 . In other words, with simple inclination of the housing  110 , the display position of the deletion mark  121   a  is not moved, and the display area on the LCD  120  that the user can operate does not appear. Therefore, it is possible to prevent erroneous operations caused by inclination of the housing  110  that the user does not intended for the objects such as the deletion mark  121   a , an erroneous operation of which causes a significant influence. 
     5. Fifth Embodiment 
     Subsequently, a fifth embodiment of the present disclosure will be described. Furthermore, since the configuration of the portable terminal  100 , operations and processes relating to display in the fifth embodiment is substantially the same as those in the first embodiment, detailed description thereof will be omitted. 
     In the fifth embodiment of the present disclosure described above, when shaking of the housing  110  is acquired by the shaking acquisition unit  153  of the portable terminal  100  shown in  FIG. 1 , the display control unit  154  acquires the angle of the inclination of the housing  110  acquired by the inclination acquisition unit  151  at that time as a reference angle of the inclination of the housing  110 . 
     With the configuration, a user can perform an operation of inclining the portable terminal  100  even when an operating posture of the user is changed, with a reference of a state where the portable terminal  100  is positioned in front of the user by performing an action of, for example, shaking the portable terminal  100 . 
     6. Supplement 
     Hereinabove, exemplary embodiments of the present disclosure have been described in detail with reference to accompanying drawings, but the present disclosure is not limited thereto. It is clear that any person who has general knowledge in the technical field to which the present disclosure belongs can achieve various modified examples and amended examples within the category of the technical gist described in the claims, and it is understood that the examples certainly belong to the technical range of the present disclosure. 
     For example, in each of the embodiments above, a portable terminal is described as an example of an information processing device, but the present disclosure is not limited to the example. The information processing device can be all devices, for example, a tablet PC (Personal computer), a portable game device, and the like, that have display units and a user can incline. 
     In addition, for example, in each of the embodiments above, a movement of the display position of an object included in an image is exemplified as a display change for the image displayed on a display unit, but the present disclosure is not limited to the example. The object, for example, may rotate without moving the display position, or may appear or be erased without moving the display position. 
     The present disclosure contains subject matter related to that disclosed in Japanese Priority Patent Application JP 2010-263408 filed in the Japan Patent Office on Nov. 26, 2010, the entire content of which is hereby incorporated by reference. 
     It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.