JP2012037963A - Portable terminal device, detection area adjustment method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal device, a detection area adjustment method and a program that can reduce an erroneous selection when inputting in a portable terminal device with a touch panel.SOLUTION: A portable terminal device includes display means which displays an image of a control unit on a display surface, a touch panel which is placed oppositely to the display surface and has a detection area detecting a touch on the image of the control unit, detection means detecting an inclination of the display surface to a prescribed reference axis, and adjustment means shifting a position of the detection area on the touch panel from a prescribed reference position based on the inclination detected by the detection means.

Description

  The present invention relates to a mobile terminal device, a detection region adjustment method, and a program, and more particularly, to a mobile terminal device having a touch panel, a detection region adjustment method, and a program.

  Patent Documents 1 and 2 describe a portable terminal device having a display unit and a transparent touch panel provided on the front surface of the display unit. In the portable terminal device described in Patent Document 1, images of a plurality of operation keys are displayed on the display unit, and a plurality of operation keys displayed on the display unit are assigned to the touch panel.

  In an apparatus in which an input unit is formed by a display unit and a touch panel described in Patent Documents 1 and 2, generally, a region facing an operation key image on the display unit is included in a detection region of the touch panel. The operation key is assigned as a detection region for detecting a touch on the image, that is, an operation key.

JP 2009-224896 A JP-A-10-283160

  In the portable terminal devices described in Patent Documents 1 and 2, when the area facing the operation key image in the detection area of the touch panel is touched by the user, the operation key represented by the image facing the touched area Is selected.

  However, depending on the positional relationship between the touch panel and the user's line of sight, the position of the image of the operation key on the touch panel recognized by the user may deviate from the position of the area assigned as the operation key to the touch panel.

  FIG. 13 is a diagram for explaining a shift between the position of the image of the operation key on the touch panel recognized by the user and the position of the area assigned as the operation key on the touch panel.

  In FIG. 13, a transparent touch panel 102 is installed on the front surface of the display unit 101. The display unit 101 displays an image 101a of the operation key a and an image 101b of the operation key b. In the touch panel 102, the operation key a is assigned to the area 102a1 facing the image 101a of the operation key a, and the operation key b is assigned to the area 102b1 facing the image 101b of the operation key b. .

  However, in the example illustrated in FIG. 13, the user 103 is viewing the touch panel 102 from an oblique direction, and thus recognizes that the image 101 a of the operation key a exists in the area 102 a 2 on the touch panel 102.

  Therefore, a deviation occurs between the position of the image 101a of the operation key a on the touch panel 102 recognized by the user 103, that is, the position of the area 102a2 and the position of the area 102a1 assigned as the operation key a to the touch panel 102.

  For this reason, when the user 103 tries to operate the operation key a, a portion outside the region 102a1, for example, the region 102a2 and the region 102b1 overlaps due to a shift between the position of the region 102a1 and the position of the region 102a2. There is a possibility of touching the part. In this case, an erroneous selection occurs in which the operation key b is selected instead of the operation key a.

  Therefore, in the portable terminal device in which the input unit is formed by the display unit and the touch panel described in Patent Documents 1 and 2, there is a problem that erroneous selection is likely to occur during input.

  An object of the present invention is to provide a mobile terminal device, a detection area adjustment method, and a program that can solve the above-described problems.

  The mobile terminal device of the present invention includes a display unit that displays an image of the operation unit on a display surface, a touch panel that is disposed opposite to the display surface and includes a detection area that detects a touch on the image of the operation unit, Detection means for detecting an inclination of the display surface with respect to a predetermined reference axis, and a position of the detection area on the touch panel is moved from a predetermined reference position based on the inclination detected by the detection means. Adjusting means.

  The detection region adjustment method of the present invention includes a display unit that displays an image of an operation unit on a display surface, a touch panel that is disposed opposite to the display surface and includes a detection region that detects a touch on the image of the operation unit, A detection area adjustment method performed by a mobile terminal device having a detection step of detecting an inclination of the display surface with respect to a predetermined reference axis, and the detection area on the touch panel based on the detected inclination And an adjustment step for moving the position from a predetermined reference position.

  A program according to the present invention includes a display unit that displays an image of an operation unit on a display surface, and a touch panel that is disposed opposite to the display surface and includes a detection area that detects a touch on the image of the operation unit. And a detection procedure for detecting the tilt of the display surface with respect to a predetermined reference axis, and an adjustment for moving the position of the detection area on the touch panel from a predetermined reference position based on the detected tilt. And execute the procedure.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to reduce the erroneous selection at the time of the input in the portable terminal device which has a touch panel.

It is the block diagram which showed the portable terminal device 1 of one Embodiment of this invention. 1 is an external view showing the front of a mobile terminal device 1. 1 is an external view showing a right side surface of a mobile terminal device 1. 1 is an external view showing a bottom surface of a mobile terminal device 1. It is explanatory drawing which showed an example of the image 11b of a selection item. It is explanatory drawing for demonstrating the images 11b1-11b4 of a selection item, and the detection parts 12a1-12a4 in the touch panel 12. FIG. It is a figure for demonstrating the control flow which correct | amends the position of the detection part 12a based on the attitude angle of the portable terminal device. It is the figure which showed the attitude | position of the portable terminal device 1 in case the horizontal side 11a2 exists above the image 11b of a selection item. It is the figure which showed the attitude | position of the portable terminal device 1 in case the vertical side 11a1 exists in the upper direction of the image 11b of a selection item. It is a figure for demonstrating the attitude angle of the portable terminal device 1 in the condition where the vertical screen display is performed. It is a figure for demonstrating the attitude angle of the portable terminal device 1 in the condition where the horizontal screen display is performed. It is the figure which showed the example of a movement of the detection part 12a in case the pitch angle (theta) p is 45 degree | times. It is the figure which showed the example of a movement of the detection part 12a in case roll angle (theta) r is 0 degree | times. It is the figure which showed the example of a movement of the detection part 12a in case roll angle (theta) r is 90 degree | times. It is a figure for demonstrating the shift | offset | difference of the position of the image of the operation key on the touch panel which a user recognizes, and the position of the area | region allocated as an operation key to a touch panel.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a mobile terminal device 1 according to an embodiment of the present invention. FIG. 2A is an external view showing the front of the mobile terminal device 1. FIG. 2B is an external view showing the right side surface of the mobile terminal device 1. FIG. 2C is an external view showing the bottom surface of the mobile terminal device 1.

  In FIG. 1, the mobile terminal device 1 includes a display unit 11, a touch panel 12, an angle sensor 13, and an adjustment unit 14. The adjustment unit 14 includes a memory 14a and a control unit 14b.

  Display unit 11 can generally be referred to as display means.

  The display unit 11 is, for example, an LCD (Liquid Crystal Display). The display unit 11 is not limited to the LCD and can be changed as appropriate.

  The display unit 11 has a display surface 11a as shown in FIG. 2A. In the present embodiment, the shape of the display surface 11a is a rectangle. The length of the vertical side 11a1 of the display surface 11a is longer than the length of the horizontal side 11a2 of the display surface 11b.

  The display unit 11 displays various information on the display surface 11a. For example, the display unit 11 displays an image of the selection item on the display surface 11a. Note that the image of the selection item can be generally called an image of the operation unit.

  FIG. 3 is an explanatory diagram showing an example of the selection item image 11b. In FIG. 3, as the selection item image 11b, the selection item image 11b1 for selecting the browser, the selection item image 11b2 for selecting the mailer, the selection item image 11b3 for selecting music, and the telephone. An image 11b4 of a selection item for selecting a book is shown. Note that the number of images of selection items is not limited to four and can be changed as appropriate.

  Returning to FIG. 1, the touch panel 12 is a transparent touch panel disposed to face the display surface 11 a of the display unit 11. The touch panel 12 includes a detection area (hereinafter referred to as “detection unit”) 12a that detects a touch of a selection item on the display surface 11a to the image 11b.

  FIG. 4 is an explanatory diagram for explaining the selection item image 11 b (selection item images 11 b 1 to 11 b 4) and the detection unit 12 a (detection units 12 a 1 to 12 a 4) in the touch panel 12. In FIG. 4, the images 11b1 to 11b4 of the selection items are shown in a three-dimensional manner for easy understanding.

  In FIG. 4, among the areas of the touch panel 12, an area facing the selection item image 11 b 1 is assigned as a detection area that detects a touch on the selection item image 11 b 1, that is, a detection unit 12 a 1.

  Moreover, the area | region which opposes the image 11b2 of a selection item among the area | regions which the touch panel 12 has is allocated as a detection area | region which detects the touch to the image 11b2 of a selection item, ie, the detection part 12a2.

  Moreover, the area | region which opposes the image 11b3 of a selection item among the area | regions which the touch panel 12 has is allocated as a detection area | region which detects the touch to the image 11b3 of a selection item, ie, the detection part 12a3.

  In addition, of the areas of the touch panel 12, an area facing the selection item image 11b4 is assigned as a detection area for detecting a touch on the selection item image 11b4, that is, the detection unit 12a4.

  Note that the positions of the detection units 12a1 to 12a4 shown in FIG. 4 are predetermined as the reference positions of the detection units 12a1 to 12a4, respectively. In other words, in the present embodiment, the position where the area facing the selection item image 11b in the area of the touch panel 12 is determined in advance as the reference position of the detection unit 12a1 that detects the touch of the selection item image 11b. It has been.

  Returning to FIG. 1, the angle sensor 13 can be generally referred to as detection means.

  The angle center 13 detects the inclination of the display surface 11 a with respect to a predetermined reference axis as the attitude angle of the mobile terminal device 1. Note that the reference axis is, for example, an axis parallel to the gravity direction.

  In the present embodiment, the angle sensor 13 is a pitch angle that is a rotation angle with respect to the left and right axis 1a in the mobile terminal device 1 shown in FIG. 2A and a rotation angle with respect to the vertical axis 1b in the mobile terminal device 1 shown in FIG. 2A. The roll angle is detected. As the angle sensor 13, for example, an inclination detection unit described in Patent Document 2 may be used. The angle sensor 13 is not limited to the tilt detection unit described in Patent Document 2, and can be changed as appropriate.

  Adjustment unit 14 can be generally referred to as adjustment means.

  The adjustment unit 14 moves the position of the detection unit 12 a on the touch panel 12 from a predetermined reference position based on the inclination detected by the angle sensor 13.

  Further, the adjustment unit 14 changes the amount of movement of the detection unit 12a from the reference position in accordance with the inclination detected by the angle sensor 13.

  In the present embodiment, the adjustment unit 14 increases the amount of movement of the detection unit 12a from the reference position as the inclination detected by the angle sensor 13 increases.

  Further, the adjustment unit 14 detects the upward direction of the selection item image 11b. For example, the adjustment unit 14 stores image data of a display screen including the selection item image 11b, and detects the upward direction of the selection item image 11b with reference to the image data. As an example, the adjustment unit 14 specifies the top of the display screen represented by the image data of the display screen including the image 11b of the selection item, and sets the direction from the center of the display screen to the top of the selection item. It detects as the upper direction of the image 11b.

  The adjustment unit 14 determines the moving direction of the detection unit 12a based on the upward detection result of the selection item image 11b. In the present embodiment, the adjustment unit 14 specifies the downward direction of the selection item image 11b based on the detection result of the selection item image 11b in the upward direction, and sets the downward direction of the selection item image 11b in the detection unit 12a. Is determined as the direction of movement. The moving direction of the detection unit 12a may be an obliquely downward direction of the selection item image 11b.

  When the adjustment unit 14 determines the movement direction of the detection unit 12a, the adjustment unit 14 moves the detection unit 12a in the movement direction.

  Further, the adjustment unit 14 determines whether the vertical side 11a1 or the horizontal side 11a2 of the display surface 11a exists in the upward direction of the selection item image 11b based on the detection result in the upward direction of the selection item image 11b. Make a decision.

  The adjustment unit 14 changes the amount of movement of the detection unit 12a from the reference position in accordance with the result of the determination and the inclination detected by the angle sensor 13.

  The memory 14a holds various information, for example, screen data representing screen content displayed on the display unit 11. The screen content includes the selection item image 11b.

  The control unit 14 b controls the operation of the mobile terminal device 1. For example, the control unit 14b controls the operation of the mobile terminal device 1 according to the item selected by the user's touch on the touch panel 14. Further, based on the inclination detected by the angle sensor 13, the control unit 14b moves the position of the detection unit 12a on the touch panel 12 from a predetermined reference position.

  Note that the mobile terminal device 1 may be realized by a computer having a display unit, a touch panel, and an angle sensor. In this case, the computer reads and executes a program recorded on a recording medium such as a CD-ROM (Compact Disk Read Only Memory) that can be read by the computer, whereby the display unit 11, the touch panel 12, the angle sensor 13, and It functions as the adjustment unit 14. The recording medium is not limited to the CD-ROM and can be changed as appropriate.

  Next, the operation will be described.

  FIG. 5 is a diagram for explaining a control flow for correcting the position of the detection unit 12 a based on the attitude angle of the mobile terminal device 1. Hereinafter, the control flow will be described with reference to FIG.

  The control flow shown in FIG. 5 starts from a state where a screen is displayed on the display surface 11a (step A101).

  When the screen is displayed on the display surface 11a, the control unit 14b reads screen data representing the screen content displayed on the display unit 11 from the memory 14a. When the control unit 14b reads the screen data representing the screen content, the control unit 14b refers to the screen data representing the screen content and detects the upward direction of the display screen, that is, the upward direction of the image 11b of the selection item (step A102).

  For example, the control unit 14b specifies the uppermost part of the display screen represented by the image data of the screen content including the selection item image 11b, and sets the direction from the center of the display screen to the uppermost part as the selection item image 11b. Detect as upward direction.

  When detecting the upward direction of the selection item image 11b, the control unit 14b determines whether the vertical side 11a1 or the horizontal side 11a2 of the display surface 11a exists in the upward direction of the selection item image 11b.

  FIG. 6 is a diagram illustrating the posture of the mobile terminal device 1 when the horizontal side 11a2 exists above the selection item image 11b. Hereinafter, the screen display in the state shown in FIG. 6 is referred to as “vertical screen display”.

  FIG. 7 is a diagram illustrating the attitude of the mobile terminal device 1 when the vertical side 11a1 is present in the upward direction of the selection item image 11b. Hereinafter, the screen display in the state shown in FIG. 7 is referred to as “horizontal screen display”.

  FIG. 8 is a diagram for explaining the attitude angle of the mobile terminal device 1 in a situation where the vertical screen display is performed. In the case of the vertical screen display, the inclination angle (posture angle) of the mobile terminal device 1 with respect to the direction of gravity is represented by the pitch angle θp (see FIG. 2A).

  FIG. 9 is a diagram for explaining the attitude angle of the mobile terminal device 1 in a situation where the horizontal screen display is performed. In the case of the horizontal screen display, the inclination angle (posture angle) of the mobile terminal device 1 with respect to the direction of gravity is represented by the roll angle θr (see FIG. 2A).

  The posture angles θp and θr can be detected by the angle sensor 13.

  Subsequently, in the case of the vertical screen display (step A103), the control unit 14b measures the pitch angle θp using the angle sensor 13 (step A104).

  When the control unit 14b measures the pitch angle θp using the angle sensor 13, the control unit 14b reduces the vertical screen downward by Lp × θp, which is a value obtained by multiplying the pitch angle θp by the coefficient Lp (below the selection item image 11b). Control to move the detection unit 12a in the direction (step A105).

  In step A105, for example, when the pitch angle θp is 0 degree, the control unit 14b uses the detection units 12a1 to 12a4 in the touch panel 12 as the reference of the detection units 12a1 to 12a4 as shown in FIGS. Set to position.

  FIG. 10 is a diagram illustrating an example of movement of the detection unit 12a when the pitch angle θp is 45 degrees. As shown in FIG. 10, the positions of the detection units 12a1 to 12a4 move downward in the vertical screen in proportion to the pitch angle θp with respect to the selection item images 11b1 to 11b4.

  On the other hand, in the case of a horizontal screen display (step A103), the control unit 14b measures the roll angle θr using the angle sensor 13 (step A106).

  When the roll angle θr is measured using the angle sensor 13, the control unit 14 b is Lr × θr, which is a value obtained by multiplying the roll angle θr by the coefficient Lr (downward of the horizontal screen (below the selection item image 11 b). Control to move the detection unit 12a in the direction (step A107). The coefficient Lr may be the same as or different from the coefficient Lp.

  FIG. 11 is a diagram illustrating an example of movement of the detection unit 12a when the roll angle θr is 0 degrees. As shown in FIG. 11, when the roll angle θr is 0 degree, the control unit 14b sets the detection units 12a5 to 12a8 in the touch panel 12 to the reference positions of the detection units 12a5 to 12a8, respectively.

  FIG. 12 is a diagram illustrating an example of movement of the detection unit 12a when the roll angle θr is 90 degrees. As illustrated in FIG. 12, the positions of the detection units 12a5 to 12a8 are moved downward in the horizontal screen in proportion to the roll angle θr with respect to the selection item images 11b5 to 11b8.

  In this embodiment, as the posture of the mobile terminal device 1 approaches from the vertical (parallel to gravity) to the horizontal (gravity and vertical), the position of the detection unit 12a is lower in the display screen than the selection item image 11b. It is possible to move greatly to.

  The above embodiment may be modified as follows, for example.

  In the above embodiment, when the attitude angle is 0 degrees (specifically, the pitch angle θp = 0 degrees in the case of the vertical screen display or the roll angle θr = 0 degrees in the case of the horizontal screen display) The amount of movement of the detection unit 12a from the reference position is 0, and the position of the detection unit 12a is a position facing the selection item image 11b.

  However, the control unit 14b may set the amount of movement of the detection unit 12a from the reference position to 0 when the posture angle is a predetermined angle. As an example, when the predetermined angle is 45 degrees, the control unit 14b sets the movement amount of the detection unit as a calculation result of Lp × (θp−45) in the situation of vertical screen display.

  Moreover, the control part 14b may have the conditions which restrict | limit execution of the position correction of the detection part 12a. For example, when the posture angle is a value between 0 degrees and 45 degrees as a condition, the control unit 14b does not correct the position of the detection unit 12a (that is, the movement amount = 0) and the posture angle is 45 degrees. If it exceeds, it may have a condition that position correction of the detection unit 12a is executed. In this case, the control unit 14b corrects the position of the detection unit 12a according to this condition.

  In the above embodiment, the movement amount of the detection unit 12a is a value proportional to either Lp or Lr. However, the movement amount of the detection unit 12a is not proportional to either Lp or Lr. Lp × θp × θp Or the like.

  In the above embodiment, the control unit 14b detects the upward direction of the selection item image 11b. However, the control unit 14b may detect the downward direction of the selection item image 11b. In this case, the control unit 14b determines the moving direction of the detection unit 12a based on the detection result of the downward direction of the image 11b of the selection item.

  Next, the effect of this embodiment will be described.

  According to the present embodiment, in the mobile terminal device 1 including the touch panel 12, the orientation of the mobile terminal device 1 is detected with respect to each of the vertical screen display and the horizontal screen display of the screen display, and the mobile terminal device 1 is tilted. An operation of moving the selection item detection unit 12a on the touch panel 12 in proportion to the size of the touch panel 12 is performed. As a result, the detection unit 12a can be moved to a position suitable for the user to select an item in the screen display.

  When the attitude of the mobile terminal device 1 is vertical (parallel to gravity), the mobile terminal device 1 is positioned close to the front face of the user's face, and the item selection is performed in such a manner that the selection item touches directly above the image of the selection item. Is called.

  On the other hand, when the posture of the mobile terminal device 1 is horizontal (gravitational and vertical), the user looks down on the mobile terminal device 1 from an oblique direction. For this reason, when the user tries to touch the image of the selection item, the user tries to touch an area existing on a straight line connecting the image of the selection item and the user's eyes among the areas of the touch panel 12. In this case, the position touched by the user is likely to be a part (lower part) that is shifted from the area facing the image of the selected item in the area of the touch panel 12.

  In the present embodiment, the adjustment unit 14 moves the position of the detection unit 12 a on the touch panel 12 from a predetermined reference position based on the inclination detected by the angle sensor 13. For this reason, it becomes possible to move the position of the detection part 12a to the position suitable for user operation. Therefore, it is possible to reduce erroneous selection.

  Moreover, in this embodiment, the adjustment part 14 changes the moving amount | distance of the detection part 12a from a reference position according to the inclination detected by the angle sensor 13. FIG. In this case, the amount of movement of the detection unit 12a can be appropriately changed according to the inclination detected by the angle sensor 13.

  In the present embodiment, the adjustment unit 14 increases the amount of movement of the detection unit 12a from the reference position as the inclination detected by the angle sensor 13 increases. In this case, the amount of movement of the detector 12a increases as the inclination increases, and the amount of movement of the detector 12a can be changed more appropriately.

  In the present embodiment, the adjustment unit 14 detects the upward direction or the downward direction of the image of the selection item, determines the movement direction of the detection unit 12a based on the detection result, and detects the detection unit in the movement direction. Move 12a. In this case, the moving direction of the detection unit 12a can be appropriately determined.

  In the present embodiment, the adjustment unit 14 determines the downward direction of the selection item image as the movement direction of the detection unit 12a based on the detection result of the upward or downward direction of the selection item image. In this case, the moving direction of the detection unit 12a can be determined more appropriately.

  Further, in the present embodiment, the adjusting unit 14 detects the vertical direction 11a1 of the display surface 11a in the upward or downward direction of the selection item image 11b based on the detection result in the upward or downward direction of the selection item image 11b. Or whether the horizontal side 11a2 exists. The adjustment unit 14 changes the amount of movement of the detection unit 12a from the reference position in accordance with the result of the determination and the inclination detected by the angle sensor 13. In this case, the amount of movement can be changed depending on whether the vertical side 11a1 or the horizontal side 11a2 of the display surface 11a is present above or below the selection item image 11b.

  In the embodiment described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration.

DESCRIPTION OF SYMBOLS 1 Portable terminal device 11 Display part 11a Display surface 11a1 Vertical side 11a2 Horizontal side 11b, 11b1-11b4 Image of selection item 12 Touch panel 12a, 12a1-12a4 Detection part 13 Angle sensor 14 Adjustment part 14a Memory 14b Control part

Claims (10)

Display means for displaying an image of the operation unit on the display surface;
A touch panel disposed opposite to the display surface and having a detection area for detecting a touch on the image of the operation unit;
Detecting means for detecting an inclination of the display surface with respect to a predetermined reference axis;
A portable terminal device comprising: adjustment means for moving the position of the detection area on the touch panel from a predetermined reference position based on the inclination detected by the detection means. The mobile terminal device according to claim 1,
The adjustment unit is a mobile terminal device that changes a movement amount of the detection area from the reference position according to the inclination detected by the detection unit. The mobile terminal device according to claim 2,
The adjustment unit is a mobile terminal device that increases the amount of movement as the inclination detected by the detection unit increases. The portable terminal device according to any one of claims 1 to 3,
The adjustment unit detects an upward direction or a downward direction of the image of the operation unit, determines a moving direction of the detection area based on a result of the detection, and moves the detection area in the moving direction. Terminal device. The mobile terminal device according to claim 4,
The adjustment unit is a mobile terminal device that determines a downward direction of the image of the operation unit as a moving direction of the detection area based on the detection result. In the portable terminal device according to claim 4 or 5,
The shape of the display surface is a rectangle, and the length of the vertical side of the display surface is longer than the length of the horizontal side of the display surface,
The adjusting means determines whether the horizontal side or the vertical side exists in the upward or downward direction of the image of the operation unit based on the detection result, and the result of the determination A mobile terminal device that changes the amount of movement of the detection area from the reference position in accordance with the inclination detected by the detection means. A detection region performed by a mobile terminal device having display means for displaying an image of an operation unit on a display surface, and a touch panel having a detection region that is disposed opposite to the display surface and detects a touch on the image of the operation unit An adjustment method,
A detecting step for detecting an inclination of the display surface with respect to a predetermined reference axis;
An adjustment step of moving the position of the detection area on the touch panel from a predetermined reference position based on the detected inclination. In the detection area adjustment method according to claim 7,
In the adjustment step, a detection area adjustment method of changing a movement amount of the detection area from the reference position according to the detected inclination. A computer having display means for displaying an image of the operation unit on a display surface, and a touch panel having a detection area that is arranged to face the display surface and detects a touch on the image of the operation unit.
A detection procedure for detecting an inclination of the display surface with respect to a predetermined reference axis;
A program for executing an adjustment procedure for moving the position of the detection area on the touch panel from a predetermined reference position based on the detected inclination. The program according to claim 9,
In the adjustment procedure, the amount of movement of the detection region from the reference position is changed according to the detected inclination.

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