WO2012120799A1 - 表示装置及び表示方向切替方法 - Google Patents
表示装置及び表示方向切替方法 Download PDFInfo
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- WO2012120799A1 WO2012120799A1 PCT/JP2012/001138 JP2012001138W WO2012120799A1 WO 2012120799 A1 WO2012120799 A1 WO 2012120799A1 JP 2012001138 W JP2012001138 W JP 2012001138W WO 2012120799 A1 WO2012120799 A1 WO 2012120799A1
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- angle
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
- G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
- G06F2200/161—Indexing scheme relating to constructional details of the monitor
- G06F2200/1614—Image rotation following screen orientation, e.g. switching from landscape to portrait mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/12—Details of telephonic subscriber devices including a sensor for measuring a physical value, e.g. temperature or motion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
Definitions
- the present invention relates to a display device for switching the display direction of a display object to be displayed on a display, and more particularly to improvement of a user interface.
- Patent Document 1 display devices such as smartphones and tablet terminals that can detect a change in inclination of the device with respect to the gravity direction using an acceleration sensor and display a display object in accordance with the vertical direction of the device are known (for example, Patent Document 1).
- Patent Document 2 describes a display device that displays the user's face in the vertical direction of the display object by capturing the user's face and recognizing the vertical direction of the face.
- the display object can be displayed in the vertical direction corresponding to the vertical direction of the display device by simply changing the orientation of the display device.
- the display device described in Patent Literature 2 can perform display by aligning the vertical direction of the user's face and the vertical direction of the display object, but must always perform shooting and face recognition processing with high power consumption. There is a problem that the operation time of the battery is shortened because the power is increased.
- the present invention has an object to provide a display device capable of displaying a display object in a display direction that matches the vertical direction of the user's face while suppressing power consumption. .
- a display device is a portable display device having a display, and the display direction of a display object on the display is variable.
- Tilt detection means that detects the component at a rotation angle from the reference line in the vertical plane, and recognizes the viewer's face relative to the display, and the vertical direction of the viewer's face relative to the display is
- a face direction specifying means for specifying which direction in the posture and an angle range depending on the selection number of display directions that can be displayed on the display are set, and an angle of the display newly detected by the tilt detecting means is set.
- the angle detected by the tilt detection means exceeds the angle range to which the angle belongs, and at least different angles
- a terminal direction determining unit that determines whether or not the vehicle has entered the range, and when the terminal direction determining unit positively performs the determination, the identification by the face direction identifying unit is started, and relative to the display Control means for changing the display direction in accordance with the result of specifying the face of the viewer's face in the vertical direction.
- the display device can perform display in a display direction corresponding to the vertical direction of the user's face while suppressing power consumption.
- FIG. 1 is an external view of the display device 100.
- the display device 100 includes a touch panel 101, a camera 102, and a speaker 103, and a user can see a display object displayed on the touch panel 101 and hear a sound flowing from the speaker 103.
- the display object refers to everything displayed on the touch panel 101, which includes icons, character strings, and other images.
- the touch panel 101 has four sides 201, 202, 203, and 204, and displays a display object in one of display directions of A direction, B direction, C direction, and D direction.
- the A direction is a direction in which the side 201 is the upper side and the side 203 is the lower side
- the B direction is a direction in which the side 202 is the upper side and the side 204 is the lower side
- the C direction is the side 203. Is the direction with the side 201 as the lower side
- the D direction is the direction with the side 204 as the upper side and the side 202 as the lower side.
- the camera 102 is installed on the same surface as the display surface of the touch panel 101, and can capture the face of the user who is using the display device 100.
- FIG. 2 is a diagram for explaining the operation of the display device 100.
- the display is displayed.
- the vertical direction of the apparatus 100 changes from an orientation in which the side 201 is in the vertically upward direction to an orientation in which the side 202 is in the vertically upward direction.
- the display object is not displayed in the B direction in accordance with the vertical direction of the display device 100 (see FIG. 2C), but the vertical direction of the user's face is specified, and then the display direction of the display object is determined. To decide.
- the user's face is photographed by the camera 102
- the vertical direction of the face is specified based on the photographed facial image
- the display is performed by combining the vertical direction of the face relative to the display and the vertical direction of the display object.
- the display object is displayed on the touch panel 101 in the A direction. Note that photographing of the user's face and specifying the vertical direction, which are processes that consume a large amount of power, are performed only when the tilt of the display device 100 changes by a predetermined value or more.
- the vertical direction of the display device 100 and the upward direction of the user's face such as when the display device 100 is used while the user lies down while suppressing the number of processes related to face recognition with high power consumption, Even if they do not match, it is possible to display a display object according to the vertical direction of the user's face.
- FIG. 3 is a functional configuration diagram of the main part of the display device 100.
- the display device 100 includes a terminal direction determination unit 110, an inclination detection unit 111, a face direction identification unit 120, a control unit 130, a display unit 140, an input unit 150, and a storage unit 160.
- the display device 100 includes a processor and a memory, and the functions of the terminal direction determination unit 110, the face direction identification unit 120, the control unit 130, the display unit 140, and the input unit 150 are included in the above-described memory. This is realized by the above-mentioned processor executing the stored program.
- the tilt detection unit 111 is an acceleration sensor, and is installed on the upper left of the display device 100, and has a function of measuring accelerations in three orthogonal axes. As shown in FIG. 1, the three axes here are the x axis in the right direction from the upper left point on the display surface of the touch panel 101, the y axis in the lower direction, and the z axis in the vertical direction from the display surface of the touch panel 101. Take.
- the terminal direction determination unit 110 has a function of determining whether the inclination detected by the current inclination detection unit 111 has changed by a predetermined value or more since the display is updated in the display direction of the current display object.
- the tilt refers to an angle formed by the direction of the gravity touch panel 101 in the xy plane with respect to the y axis, and the tilt means the tilt of the touch panel 101. Since the touch panel 101 and the display device 100 are inseparable, they are described as the inclination of the display device 100 for convenience, and the description will be continued hereinafter.
- the terminal direction determination unit 110 includes four display directions: A direction, B direction, C direction, and D direction. Depending on the direction, four angle ranges of 315 ° to 45 °, 45 ° to 135 °, 135 ° to 225 °, and 225 ° to 315 ° are set. It is desirable to make an affirmative determination (determination that the inclination has changed by a predetermined value or more since the display is updated in the display direction of the current display object) when the angle range to which the detected inclination belongs changes to another one. .
- the predetermined value is set to 70 degrees
- the center value of the angle range to which the inclination detected by the inclination detecting unit 111 when the display direction of the display object was updated last time is used as a reference indicating the inclination before the change.
- the face direction specifying unit 120 further includes an imaging unit 121 and a face recognition unit 122, and has a function of specifying the vertical direction of the face of the user who is using the display device 100.
- the imaging unit 121 includes a camera 102 and supplies power to the camera 102 to operate the camera 102 to photograph the user's face.
- the imaging unit 121 captures the user's face for face recognition only when the terminal direction determination unit 110 determines that the inclination has changed to a predetermined value or more.
- the face recognizing unit 122 has a function of recognizing eyes and nose by collating the face image of the user captured by the image capturing unit 121 with a template for recognizing a facial part held in advance.
- the upward direction of the template corresponds to the upward direction of the face in the template, and when recognizing the facial part, the vertical direction of the face in the image captured by the imaging unit 121 and the vertical direction of the template If the direction deviates greatly, the facial part cannot be recognized. Therefore, the face recognition unit 122 performs face recognition by designating and rotating the template so that any of the A direction, the B direction, the C direction, and the D direction is up. Note that the upward direction of the captured image corresponds to the A direction on the touch panel 101.
- the face direction identification unit 120 identifies the vertical direction of the face based on the orientation of the template when the face recognition unit 122 can recognize the eyes and nose. For example, if the upward direction of the template when the face recognition unit 122 can recognize eyes and nose is the A direction, the upward direction of the user's face is specified as the A direction.
- the face direction specifying unit 120 notifies the control unit 130 of the specified direction, and if the face recognition unit 122 cannot recognize the eyes and nose, the face direction specifying unit 120 notifies the control unit 130 that it has not been recognized. .
- the control unit 130 has a function of controlling the entire processing related to display on the display device 100.
- control unit 130 rotates the display object so that the vertical direction of the face specified by the face direction specifying unit 120 matches the vertical direction of the display object, and appropriately enlarges or reduces the display object to a size that can be displayed on the touch panel 101.
- An instruction is sent to the unit 140.
- the display of the display object is controlled according to the inclination detected by the inclination detection unit 111.
- the display unit 140 includes the touch panel 101, and has a function of receiving an instruction from the control unit 130 and displaying a display object on the touch panel 101.
- the input unit 150 has a function of detecting a touch on the touch panel 101 and receiving an input from the user.
- the storage unit 160 is a memory area for storing terminal direction information 10 and face direction information 20 described later.
- the terminal direction information 10 is information indicating the center value of the angle range to which the inclination detected by the inclination detecting unit 111 belongs, and stores any value of 0 degree, 90 degrees, 180 degrees, and 270 degrees.
- the terminal direction information 10 is updated by the control unit 130 after the terminal direction determination unit 110 makes a positive determination. Specifically, if the inclination detected by the inclination detection unit 111 is in the range of 315 degrees to 45 degrees, it is 0 degrees, if it is in the range of 45 degrees to 135 degrees, it is 90 degrees, and if it is in the range of 135 degrees to 225 degrees. If it is in the range of 180 degrees, 225 degrees to 315 degrees, it is updated to 270 degrees.
- the terminal direction information 10 is used as a reference value indicating the inclination before the change, and the inclination detected by the inclination detection unit 111 when the display direction of the display object is updated last time is n.
- the face direction information 20 will be described.
- the face direction information 20 is information indicating the display direction of the current display object, and stores information on any one of the A direction, the B direction, the C direction, and the D direction.
- the face direction information 20 is updated in the display direction of the display object at that time by the control unit 130 after the display is updated by performing the face direction specifying process.
- FIG. 5 is a flowchart showing the operation of the display device 100.
- the terminal direction determination unit 110 first displays a background image, an icon, and the like as previously defined as an initial display after activation (step S1). Thereafter, when there is an input operation by the user (Yes in step S2), processing corresponding to the input operation is performed, and the display is updated (step S3). For example, if a user inputs a character string by touching the touch panel 101, the character string is displayed. Subsequently, the terminal direction determination unit 110 acquires the terminal direction information 10 from the storage unit 160 (step S4), and the inclination detected by the current inclination detection unit 111 from the inclination indicated by the terminal direction information 10 is a predetermined value.
- the terminal direction determination unit 110 calculates an absolute value P of a value obtained by subtracting the inclination detected by the current inclination detection unit 111 from the terminal direction information 10 stored in the storage unit 160.
- the calculated absolute value P is compared with the value obtained by subtracting the absolute value P from 360 degrees, and the smaller value is set as the slope change S.
- the absolute value P can be expressed as follows.
- P
- the change S of the slope can be expressed as follows.
- S Min (P, 360-P)
- the terminal direction determination unit 110 determines whether or not the inclination change S is greater than or equal to a predetermined value.
- the inclination changes from 0 degrees to 135 degrees, and the display direction of the display object is updated from the A direction to the C direction.
- the tilt changes from 180 degrees indicated by the terminal direction information 10 to a predetermined value, that is, ⁇ 70 degrees or more. Therefore, the terminal direction determination unit 110 does not determine that the inclination has changed by a predetermined value or more. As a result, it is possible to prevent the face direction identification unit 120 from frequently photographing and recognizing the face of the user and continuing to consume power.
- the control unit 130 updates the terminal direction information 10 stored in the storage unit 160 (step S6). ), It notifies the face direction identification unit 120 that the terminal direction determination unit 110 has determined that the inclination has changed to a predetermined value or more.
- the face direction specifying unit 120 performs face direction specifying processing (step S7). Details of the face direction specifying process will be described later.
- the control unit 130 rotates the display object according to the vertical direction of the face specified by the face direction specifying process, appropriately enlarges or reduces the display object to fit on the touch panel 101, and sends an instruction to the display unit 140.
- the display unit 140 receives the instruction and displays a display object on the touch panel 101 (step S8). If the face direction identification unit 120 cannot identify the vertical direction of the face, the upward direction of the face is assumed to be coincident with the vertical upward direction of the display device 100, and the vertical upper side of the display device 100 is assumed. Is displayed in the upward direction.
- control unit 130 updates the face direction information 20 with the display direction of the display object updated in step S8 (step S9).
- step S7 details of the face direction specifying process in step S7 will be described with reference to FIG.
- the face direction identification unit 120 first operates the camera 102 to photograph the user's face (step S31). After that, rotate the template so that any of the A direction, B direction, C direction, and D direction is in the upward direction until the face image can be recognized with respect to the eyes and nose of the face image.
- the face recognition is performed sequentially.
- the template is set with the direction indicated by the face direction information 20, that is, the direction that is the upward direction of the display object, before the terminal direction determination unit 110 determines that the inclination has changed to a predetermined value or more.
- face recognition is performed (Step S33).
- the display device 100 detects which side is currently the upper side in the vertical direction from the inclination of the terminal direction information 10, and is detected.
- the template is rotated so that the upper side is upward, that is, the vertical direction of the current display device 100 is upward (step S34), and face recognition is performed (step S35).
- step S36 and S38 Face recognition is performed (step S37, step S39).
- step S34 the current display device 100 is turned upward, and before the terminal direction determination unit 110 determines that the inclination has changed to a predetermined value or more, the display object is directed upward. If the direction matches, the template is rotated so that one of the three remaining directions is upward until the face recognition is successful (step S34, step S36, step S38), Face recognition is performed (step S35, step S37, step S39).
- the face direction identification unit 120 can recognize the eyes and nose.
- the vertical direction of the template is specified as the vertical direction of the user's face (step S40) and notified to the control unit 130. If the face recognition unit 122 cannot recognize the face (No in step S39), the control unit 130 is notified that the face recognition unit 122 has not recognized the face.
- FIG. 2B the user first uses the display device 100 in a state where the side 202 is in the vertically upward direction, and then rotates the display device 100 so that the side 201 is in the vertically upward direction. (See FIG. 2A). Further, the following description will be made on the assumption that the display device 100 is used lying down with the display device 100 (see FIG. 2D).
- FIG. 4 is a diagram for explaining the face identifying process, FIG. 4 (a) shows a photographed user's face image, and FIG. 4 (b) shows a template.
- the usage state of the user changes from FIG. 2B to FIG. 2A, and the inclination detected by the inclination detection unit 111 is 3 degrees.
- the terminal direction information 10 indicates 90 degrees, it is as follows.
- the terminal direction determination part 110 determines with the inclination having changed beyond the predetermined value.
- the terminal direction determination unit 110 notifies the determination result to the control unit 130, and the control unit 130 that has received the notification updates the terminal direction information 10 at 0 degrees, and the terminal direction determination unit 110 has a predetermined value in the face direction identification unit 120. Notify that the slope has changed more than the value.
- the face direction identification unit 120 first captures the user's face. Here, the photographed face image of the user is in the A direction as shown in FIG. As shown in FIG.
- the face direction specifying unit 120 first moves the B direction indicated by the face direction information 20 first, and then the vertical upper side of the current display device 100 based on the terminal direction information 10 upward.
- the template is rotated until the eyes and nose of the face taken in the order of the A direction and the remaining two directions in this order, in this case, in the order of the D direction and the C direction, can be recognized.
- the template is rotated so that the upward direction of the template is the B direction indicated by the face direction information 20, and face recognition is performed (see FIGS. 4B and 1).
- the vertical direction of the user's face and the vertical direction of the template are largely shifted, the eyes and nose cannot be recognized.
- the face direction identification unit 120 performs face recognition by rotating the template so that the upward direction of the template is the A direction (see FIGS. 4B and 2).
- the eyes and nose of the photographed face can be recognized, and the face direction identifying unit 120 identifies the face direction as the A direction.
- the face direction identification unit 120 notifies the control unit 130 of the identified direction.
- the control unit 130 rotates the display object so as to be in the A direction specified by the face direction specifying unit 120, and appropriately enlarges or reduces the display object so as to be within the display range of the touch panel 101.
- the instruction is sent, and the display unit 140 performs display on the touch panel 101 according to the instruction. Further, the control unit 130 updates the face direction information 20 in the A direction.
- the terminal direction determination unit 110 determines that the inclination has changed to a predetermined value or more, and then the control unit 130 overwrites the terminal direction information 10 with 90 degrees, and the terminal direction determination unit 110 adds the predetermined value to the face direction identification unit 120. It is notified that it is determined that the inclination has changed as described above. Upon receiving the notification, the face direction identification unit 120 captures the user's face, rotates the template in the A direction indicated by the face direction information 20, and performs face recognition.
- the face direction specifying unit 120 specifies the face direction as the A direction.
- the control unit 130 rotates the display object so as to be in the A direction specified by the face direction specifying unit 120, appropriately enlarges or reduces the display object to be within the display range of the touch panel 101, sends an instruction to the display unit 140, and displays The unit 140 performs display on the touch panel 101 in accordance with the instruction.
- the terminal direction determination unit performs the determination process as to whether or not the inclination is changed by a predetermined value or more from the reference value before the change with the predetermined value being 70 degrees, but is not limited thereto.
- the predetermined value indicates that the orientation of the display device is more than a certain level by a user operation. Anything that can be judged to have changed is acceptable.
- the determination may be made positively when the reference range or the predetermined value is not set and the angle range to which the angle detected by the tilt detection unit is changed to a different angle range.
- the terminal direction determination unit performs the determination process using 0 degrees, 90 degrees, 180 degrees, and 270 degrees as reference values on the assumption that the display is switched in four directions, but the reference values are not limited to four. , 8 etc.
- the predetermined value is a value larger than 50 degrees.
- the face is recognized by rotating the template in four directions, and it is specified which of the four directions is the upward direction.
- the present invention is not limited to this. It is only necessary to be able to specify the vertical direction of the face for determining the display direction.
- the face is rotated by 5 degrees within a range of 70 to 110 degrees, 160 to 200 degrees, 250 to 290 degrees, and 340 to 20 degrees.
- the recognition may be performed, and the identified vertical direction of the recognized face is not limited to four directions.
- the control unit displays the display object on the assumption that the upward direction of the face coincides with the vertical upward direction of the display device. Not limited to. It is sufficient that the display object can be displayed even when the vertical direction of the face cannot be specified.
- the vertical direction of the display device It may be specified as a direction.
- face recognition is performed by rotating the template so that the upward direction of the display object matches the upward direction of the template before the tilt of the display device changes by a predetermined value or more.
- the face is recognized by rotating the template so that the vertical direction of the current display device matches the upward direction of the template, but the present invention is not limited to this. It is only necessary to be able to determine the order in which the templates are rotated so that face recognition can be performed efficiently.For example, first, the template is rotated so that the vertical upward direction of the current display device matches the upward direction of the template. You may go.
- face recognition is not performed with the vertical upper direction of the current display device as the upper direction of the template, the template is rotated in three directions, and when the face cannot be recognized at any time, The display object may be displayed in a display direction corresponding to the vertically upward direction. As a result, the maximum number of face recognitions can be reduced to three.
- the template is used for recognizing the face.
- the present invention is not limited to this.
- a digitized value may be used, and the position, shape, etc. of the part forming the face may be digitized to recognize the face.
- the face direction specifying unit specifies the vertical direction of the face by recognizing the eyes and nose of the photographed face image, but the present invention is not limited to this. Eyes and eyebrows may be used, as long as the vertical direction of the face can be specified, such as a shoulder or a neck.
- the tilt detection unit is an acceleration sensor.
- any other sensor can be used as long as the angle can be detected or the angle can be obtained from a detected value such as a gyro sensor. good.
- the terminal direction determination unit performs the determination by using the angle formed by the component of the gravity in the xy plane and the y axis as the inclination, but the present invention is not limited to this. Assuming that the display device is handed over by rotating the x-axis around another user, the angle between the component in the yz plane and the y-axis may be determined as the inclination.
- the face direction may be specified when the orientation of the display device is changed to a certain degree or more by a user operation.
- the face direction specifying unit performs shooting and face recognition of the user's face only when the terminal direction determination unit determines that the inclination has changed by a predetermined value or more.
- the processor of the display device is in a low power state when it is not performing processing, it is possible to further reduce power consumption.
- a display device is a portable display device having a display as shown in FIG. 3, and the display direction of a display object on the display is variable.
- Tilt detection means that detects the vertical component of the tilt of the display at the rotation angle from the reference line in the vertical plane, and recognizes the viewer's face relative to the display, and the upper and lower sides of the viewer's face relative to the display
- a face direction specifying means for specifying which direction is the direction of the current display orientation, and an angle range depending on the number of display directions that can be displayed on the display are set.
- the detected angle of the display is less than the angle range to which the angle detected by the tilt detection means belongs when the display direction of the display object on the display is changed immediately before.
- a terminal direction determination unit that determines whether or not the vehicle has entered a different angle range, and when the terminal direction determination unit positively performs the determination, the identification by the face direction identification unit is started, Control means for changing the display direction in accordance with the result of specifying the vertical direction of the face of the viewer facing the display.
- the angle range depends on the selection number of display directions that can be displayed on the display, but does not necessarily coincide with the selection number.
- the display direction is four directions, there are eight angle ranges. It may be divided into two.
- the inclination detection means is not limited to detecting the angle itself, but may be any means that can calculate the angle from the detected information.
- the display device does not always perform the process related to specifying the vertical direction of the face, but when the angle range to which the inclination detected by the inclination detecting unit changes is different, Since the process related to specifying the direction is performed, the display object can be displayed in the display direction corresponding to the vertical direction of the user's face while suppressing power consumption related to specifying the vertical direction of the face.
- the terminal direction determination means in the display device is detected by the inclination detection means when the display angle newly detected from the inclination detection means has changed the display direction of the display object on the display immediately before.
- the determination may be affirmed when the angle range exceeds the angle range to which the angle belongs and further enters a different angle range by a predetermined value or more from the boundary of the angle range.
- the inclination detected by the inclination detection means exceeds the angle range that belonged when the display direction of the display object was changed immediately before, and enters an angle range that differs by a predetermined value or more from the boundary of the angle range. Since the determination is made positively when the user is doing, even if the tilt of the display device is not stable near the boundary of the angle range, the user's face is frequently photographed and face-recognized, and power continues to be consumed. To prevent.
- the terminal direction determination unit in the display device may perform the determination based on an angle that a vertical component on the display plane forms with the reference line among the angles detected by the tilt detection unit. Good.
- the terminal direction determination means determines only the inclination indicated by the vertical component on the display surface of the display, the user needs a display in the usage scene where the display surface is raised from the horizontal.
- the display object is displayed in a suitable direction when it is rotated according to the above, and the determination can be performed more efficiently than the determination by the inclination in all directions, and the power consumption can be further suppressed.
- the display device further includes storage means for storing the display direction of the display object on the immediately preceding display, and the face direction specifying means recognizes a facial part held in advance in the photographed face image.
- the face direction specifying means in the display device detects one side that is vertically above the current display from the angle detected by the inclination detecting means when the face recognizing means cannot recognize the face part. Then, the vertical direction of the face may be specified so that the detected one side is upward. According to this configuration, even when the face recognizing unit cannot recognize the part of the face, the vertical upward direction of the display device is specified as the upward direction of the face, so the display is performed even when the face recognizing unit cannot recognize the face. You can display things.
- the tilt detection means in the display device may be an acceleration sensor. According to this configuration, since the inclination detection means is an acceleration sensor, it is possible to measure inclinations in three directions corresponding to the x axis, the y axis, and the z axis.
- the number of display directions that can be displayed on the display in the display device may be four, and the angle range depending on the selection number may be every 90 degrees. According to this configuration, since the angle range is set in accordance with the number of display directions on the display, it is highly possible that the determination and the display direction can be changed efficiently.
- the face direction specifying means in the display device recognizes a face part by collating a reference for recognizing a face part held in advance in a photographed face image in a state in which the direction is designated.
- a face recognizing unit wherein the face recognizing unit detects one side that is currently vertically above the display from an angle detected by the tilt detecting unit, and the detected one side is an upward direction of the reference. It is good also as specifying first and collating by the said reference
- the display device displays a display object in a direction corresponding to the vertical direction of the user's face relative to the display while suppressing power consumption, and is useful for a device that switches the display direction of the display object. It is.
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Abstract
Description
以下、本発明の一実施形態に係る表示装置100について説明する。
図1は、表示装置100の外観図である。
以下、表示装置100の構成について説明する。
まず、端末方向情報10について説明する。
(数式1) f(n)=0 (0≦n<45,315≦n<360)
=90 (45≦n<135)
=180(135≦n<225)
=270(225≦n<315)
次に、顔方向情報20について説明する。
以下、表示装置100の動作について説明する。
(数式2) P=|f(n)-m|
また、Min関数を以下のように定めると、傾きの変化Sは以下のように表すことができる。
(数式3) Min(a,b)=a(a≦b)
=b(a>b)
(数式4) S=Min(P,360-P)
端末方向判定部110は、傾きの変化Sが所定値以上であるか否かを判定する。
傾きの変化S=Min(87,273)=87≧70
これにより、端末方向判定部110は、所定値以上に傾きが変化したと判定する。端末方向判定部110は、判定結果を制御部130に通知し、通知を受けた制御部130は、端末方向情報10を0度で更新し、顔方向特定部120に端末方向判定部110が所定値以上に傾きが変化したと判定したことを通知する。顔方向特定部120は通知を受けると、まず、ユーザの顔を撮影する。ここで、撮影されたユーザの顔画像は、図4(a)に示すようにA方向となっている。顔方向特定部120は、図4(b)に示すように、まずは顔方向情報20が示すB方向、次に、端末方向情報10に基づいて現在の表示装置100の鉛直上側の辺を上方向としたA方向、その後は、残る2つの方向を順に、ここでは、D方向、C方向の順番に撮影した顔の目と鼻とを認識できるまでテンプレートを回転させていくこととなる。まず、テンプレートの上方向が顔方向情報20の示すB方向となるようにテンプレートを回転し、顔認識を行う(図4(b)(1)参照)。ここでは、ユーザの顔の上下方向とテンプレートの上下方向とが大きくずれているため、目と鼻との認識は行えない。次に、顔方向特定部120は、テンプレートの上方向がA方向となるようにテンプレートを回転し、顔認識を行う(図4(b)(2)参照)。ここで、撮影した顔の目と鼻とが認識でき、顔方向特定部120は顔方向をA方向と特定する。顔方向特定部120は特定した方向を制御部130に通知する。通知を受けた制御部130は、顔方向特定部120が特定したA方向となるように、表示物を回転し、タッチパネル101の表示範囲に収まるように適宜拡大又は縮小を行い、表示部140に指示を送り、表示部140は指示に従い、タッチパネル101に表示を行う。また、制御部130は、顔方向情報20をA方向で更新する。
傾きの変化S=Min(92,268)=92≧70
端末方向判定部110は所定値以上に傾きが変化したと判定し、その後、制御部130は、端末方向情報10を90度で上書きし、顔方向特定部120に端末方向判定部110が所定値以上に傾きが変化したと判定したことを通知する。顔方向特定部120は通知を受けると、ユーザの顔を撮影し、テンプレートを顔方向情報20の示すA方向に回転し、顔認識を行う。このとき、ユーザの顔は、表示装置100に対してA方向を上として撮影されているため、顔の部位が認識でき、顔方向特定部120は顔方向をA方向と特定する。制御部130は、顔方向特定部120が特定したA方向となるように、表示物を回転し、タッチパネル101の表示範囲に収まるように適宜拡大又は縮小し、表示部140に指示を送り、表示部140は指示に従い、タッチパネル101に表示を行う。
以上、本発明に係る表示装置の実施形態を説明したが、例示した表示装置を以下のように変形することも可能であり、本発明が上述の実施形態で示した通りの表示装置に限られないことは勿論である。
101 タッチパネル
102 カメラ
103 スピーカ
110 端末方向判定部
111 傾き検知部
120 顔方向特定部
121 撮像部
122 顔認識部
130 制御部
140 表示部
150 入力部
160 記憶部
Claims (9)
- ディスプレイを有し、当該ディスプレイへの表示物の表示方向が可変である可搬な表示装置であって、
前記ディスプレイの傾きとして鉛直方向の成分を、鉛直面内における基準線からの回転角度で検知する傾き検知手段と、
ディスプレイに相対する看者の顔を認識し、ディスプレイに相対する看者の顔の上下方向が、現在のディスプレイの姿勢においていずれの方向であるかを特定する顔方向特定手段と、
ディスプレイに表示可能な表示方向の選択数に依存した角度範囲を設定し、新たに前記傾き検知手段から検知されるディスプレイの角度が、直前にディスプレイへの表示物の表示方向を変更した際に前記傾き検知手段が検知した角度が属する角度範囲を超えて、少なくとも異なる角度範囲に進入しているか否かを判定する端末方向判定手段と、
前記端末方向判定手段が前記判定を肯定的に行ったときに、前記顔方向特定手段による前記特定を開始させると共に、ディスプレイに相対する看者の顔の上下方向の特定結果に応じて表示方向を変更して表示させる制御手段と
を備えることを特徴とする表示装置。 - 前記端末方向判定手段は、新たに前記傾き検知手段から検知されるディスプレイの角度が、直前にディスプレイへの表示物の表示方向を変更した際に前記傾き検知手段が検知した角度が属する角度範囲を超えて、更に、当該角度範囲の境界より所定値分以上に異なる角度範囲に進入している場合に、前記判定を肯定的に行う
ことを特徴とする請求項1に記載の表示装置。 - 前記端末方向判定手段は、前記傾き検知手段が検知する角度のうち、前記ディスプレイ平面における鉛直方向の成分が、前記基準線となす角度に基づいて前記判定を行う
ことを特徴とする請求項2に記載の表示装置。 - 更に、直前のディスプレイへの表示物の表示方向を記憶する記憶手段を備え、
前記顔方向特定手段は、撮影した顔画像に予め保持している顔の部位を認識するための基準を、方向を指定した状態で照合することにより顔の部位を認識する顔認識手段を含み、
前記顔認識手段は、前記記憶手段が記憶する表示方向に基づく表示物の上方向を、前記基準の上方向として最初に指定し、前記基準による照合をおこなう
ことを特徴とする請求項3に記載の表示装置。 - 前記顔方向特定手段は、前記顔認識手段が顔の部位を認識できなかったときには、前記傾き検知手段が検知した角度より現在の前記ディスプレイの鉛直上側となる1辺を検出し、検出した1辺が上方向となるようにディスプレイに相対する顔の上下方向を特定する
ことを特徴とする請求項4に記載の表示装置。 - 前記傾き検知手段は、加速度センサである
ことを特徴とする請求項5に記載の表示装置。 - 前記ディスプレイが表示可能な表示方向の数が4であり、選択数に依存した前記角度範囲が90度毎である
ことを特徴とする請求項6に記載の表示装置。 - 前記顔方向特定手段は、撮影した顔画像に予め保持している顔の部位を認識するための基準を、方向を指定した状態で照合することにより顔の部位を認識する顔認識手段を含み、
前記顔認識手段は、前記傾き検知手段が検知した角度より現在の前記ディスプレイの鉛直上側となる1辺を検出し、検出した1辺が前記基準の上方向となるように最初に指定し、前記基準による照合をおこなう
ことを特徴とする請求項3に記載の表示装置。 - ディスプレイを有し、当該ディスプレイへの表示物の表示方向が可変である可搬な表示装置における表示方向切替方法であって、
傾き検知手段により、前記ディスプレイの傾きとして鉛直方向の成分を、鉛直面内における基準線からの回転角度で検知する傾き検知ステップと、
顔方向特定手段により、ディスプレイに相対する看者の顔を認識し、ディスプレイに相対する看者の顔の上下方向が、現在のディスプレイの姿勢においていずれの方向であるかを特定する顔方向特定ステップと、
端末方向判定手段により、ディスプレイに表示可能な表示方向の選択数に依存した角度範囲を設定し、新たに前記傾き検知ステップから検知されるディスプレイの角度が、直前にディスプレイへの表示物の表示方向を変更した際に前記傾き検知ステップが検知した角度が属する角度範囲を超えて、少なくとも異なる角度範囲に進入しているか否かを判定する端末方向判定ステップと、
制御手段により、前記端末方向判定ステップが前記判定を肯定的に行ったときに、前記顔方向特定ステップによる前記特定を開始させると共に、ディスプレイに相対する看者の顔の上下方向の特定結果に応じて表示方向を変更して表示させる制御ステップと
を含むことを特徴とする表示方向切替方法。
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