JP2014021556A - Correcting device, correcting program, and correcting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce, regarding the locus of an object on a contact face, any deviation of the shape after correction from that before correction.SOLUTION: A correcting device has an input unit that detects contact of an object with a contact face and a processor. The processor calculates a position indicated by the object on the basis of the shape of the contact area of the object with the contact face, it also calculates a quantity of correction regarding the indicated position on the basis of the shape of the contact area within a prescribed length of time since the detection of the contact of the object, and applies correction by the same quantity of correction to the indicated position calculated while the contact state of the object is maintained.

Description

  The present invention relates to a correction apparatus, a correction program, and a correction method.

  In recent years, electronic devices such as portable terminals equipped with a touch panel have been increasing. In a mobile phone or the like that does not include a touch panel and accepts input by buttons, many users perform input using the thumb of one hand. For that reason, when using a portable terminal equipped with a touch panel, the input with the thumb is the mainstream. In the input form using one thumb, when the position where the user is holding the mobile terminal (for example, the base of the thumb) and the target touch position are far from each other, the portion of the thumb belly is located at a portion other than the target touch position. May come into contact. That is, an area corresponding to a portion different from the fingertip intended by the user may be a contact area. As a result, the position detected as the pointing position by the touch panel may be different from the position intended by the user.

  Therefore, conventionally, it has been studied to sequentially correct the detected indication position based on the width of the contact area.

JP 2010-204812 A JP 2010-61372 A

  However, when a finger is slid while maintaining the contact state, the contact area during the slide is not necessarily constant. Therefore, the shape of the contact area detected by the touch panel during the slide is not necessarily constant. In addition, since there is a gap in the electrode of the capacitive touch sensor, the shape of the contact area detected by the touch panel may not be constant even if the shape of the contact area during the slide is constant. Yes.

  The correction amount calculated based on the non-constant contact area changes during finger sliding. As a result, the shape of the trajectory of the indicated position detected by the touch panel, that is, the shape of the trajectory intended by the user may be greatly deviated.

  Therefore, an object of one aspect is to reduce the deviation between the shape before correction and the shape after correction for the locus of an object on the contact surface.

  In one proposal, the correction device includes an input unit that detects contact of an object with the contact surface and a processor, and the processor instructs the object based on a shape of a contact area of the object with respect to the contact surface. A position is calculated, a correction amount related to the indicated position is calculated based on the shape of the contact area within a predetermined time after the contact of the object is detected, and calculated while the contact state of the object is maintained The indicated position is corrected by the same correction amount.

  According to one aspect, the deviation between the shape before correction and the shape after correction can be reduced with respect to the locus of the object on the contact surface.

It is a figure which shows the hardware structural example of the portable terminal in this Embodiment. It is a figure which shows the function structural example of the portable terminal in this Embodiment. It is a flowchart for demonstrating an example of the process sequence which a portable terminal performs. It is a figure which shows each parameter regarding the contact area | region in this Embodiment. It is a figure which shows the example of correction | amendment of a designated position. It is a figure which shows the example of correction | amendment by this Embodiment when the finger which contacted moved linearly. It is a figure which shows the example of correction | amendment in case a correction value changes according to the shape of a contact region.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a mobile terminal such as a smartphone or a tablet terminal will be described as an example of an electronic apparatus including an input unit having a contact surface.

  FIG. 1 is a diagram illustrating a hardware configuration example of a mobile terminal according to the present embodiment. In FIG. 1, the portable terminal 10 includes a CPU 11, a memory 12, an auxiliary storage device 13, a touch panel 14, and the like.

  The auxiliary storage device 13 stores a program installed in the mobile terminal 10. The memory 12 reads the program from the auxiliary storage device 13 and stores it when there is an instruction to start the program. The CPU 11 realizes functions related to the mobile terminal 10 according to a program stored in the memory 12.

  The touch panel 14 is an electronic component having both an input function and a display function, and displays information, accepts input from a user, and the like. The touch panel 14 includes a display device 15, an input device 16, a touch control IC 17, and the like.

  The display device 15 is a liquid crystal panel or the like, and bears the display function of the touch panel 14. The input device 16 is an electronic component including a sensor that detects contact of a contact object with the display device 15. The contact detection method of the contact object may be any known method such as an electrostatic method, a resistive film method, or an optical method. The input device 16 inputs a set of coordinates (hereinafter referred to as “sensor coordinates”) of sensors that have reacted to the contact object (that is, detected contact) to the touch control IC 17. The contact object refers to an object that contacts the touch panel 14. Examples of such an object include a user's finger and a dedicated or general pen.

  The touch control IC 17 is an IC (Integrated Circuit) that determines the shape of the contact area of the contact object based on a set of sensor coordinates input from the input device 16.

  FIG. 2 is a diagram illustrating a functional configuration example of the mobile terminal according to the present embodiment. In FIG. 2, the mobile terminal 10 includes a contact area specifying unit 111, a gravity center position calculating unit 112, a correction amount calculating unit 113, a correcting unit 114, an upper unit 115, and the like. Among these, the contact area specifying unit 111 is realized by a process that the program stored in the touch control IC 17 causes the touch control IC 17 to execute. The other units are realized by processing that is stored in the auxiliary storage device 13 and executed by the CPU 11 by a program loaded in the memory 12. However, the contact area specifying unit 111 may be realized by the CPU 11 similarly to the other units. In addition, each unit other than the upper unit 115 may be realized by the touch control IC 17.

  The mobile terminal 10 also has a correction amount storage unit 116. The correction amount storage unit 116 can be realized using, for example, the memory 12 or the auxiliary storage device 13.

  The contact area specifying unit 111 specifies the shape of the contact area of the contact object to the input device 16 based on the set of sensor coordinates input from the input device 16.

  The centroid position calculation unit 112 calculates the centroid position of the contact area. The position of the center of gravity of the contact area becomes the reference position of the indicated position by the contact object. The correction amount calculation unit 113 calculates a correction amount for the center of gravity position based on the shape of the contact area and the like. The calculated correction amount is stored in the correction amount storage unit 116.

  The correction unit 114 corrects the barycentric position calculated by the barycentric position calculating unit 112 with the correction amount stored in the correction amount storage unit 116. The corrected result is output to the upper unit 115 as the coordinate value of the indicated position by the contact object.

  The upper unit 115 is an application or the like that provides a user with a predetermined function in response to an operation via the touch panel 14.

  Hereinafter, the process procedure which the portable terminal 10 performs is demonstrated. FIG. 3 is a flowchart for explaining an example of a processing procedure executed by the mobile terminal. The process of FIG. 3 is started when the input device 16 detects the contact of a contact object such as a finger. For example, when a finger touchdown is performed, the process of FIG. 3 is started. Finger touchdown means that the finger touches the touch panel 14.

  In step S <b> 101, the contact area specifying unit 111 receives an input of a set of sensor coordinates from the input device 16. Subsequently, the contact area specifying unit 111 specifies the shape of the contact area based on the set of sensor coordinates (S102).

  FIG. 4 is a diagram illustrating parameters regarding the contact area in the present embodiment. The XY plane shown in FIG. 4 corresponds to the contact surface of the touch panel 14. Each lattice point shown on the XY plane corresponds to the coordinates of each sensor. An area indicated by an ellipse in FIG. 4 indicates an area formed by a set of sensor coordinates detected by the input device 16. This area corresponds to the contact area. The contact area shown in FIG. 4 is, for example, the contact area of the left thumb.

  In the present embodiment, the contact region is the coordinate values (X1, Y1) and (X2, Y2) of both ends of the line segment L1, the length d of the line segment L1, and the angle θ of the line segment L1 with respect to the X axis. It is prescribed by. That is, the contact area specifying unit 111 specifies the shape of the contact area by calculating (X1, Y1) and (X2, Y2), the length d, and the angle θ.

  The coordinate values at both ends of the line segment L1, for example, are combinations in which the distance between the two sensors is the longest among all combinations in which the two sensor coordinates in the set of input sensor coordinates are one set. It is obtained by specifying the two sensor coordinates. That is, the two specified sensor coordinates become the coordinate values of both ends of the line segment L1.

Further, the length d and the angle θ can be calculated by performing the following calculation.
The length ^{d = {(X2-X1)} 2 + (Y2-Y1) 2} 1/2
Angle θ = (Y2-Y1) / (X2-X1)
Subsequently, the center-of-gravity position calculation unit 112 calculates the coordinate value of the center-of-gravity position G of the contact area by performing the following calculation (S103). The center-of-gravity position G is a reference position for the position indicated by the contact object. Xg which is the X coordinate value of the gravity center position G and Yg which is the Y coordinate value are respectively calculated as follows.

Xg = (X1 + X2) / 2
Yg = (Y1 + Y2) / 2
Subsequently, the correction amount calculation unit 113 determines whether or not a correction amount (correction value) is stored in the correction amount storage unit 116 (S104). At the timing when step S104 is first executed after the processing of FIG. 3 is started, the correction amount is not stored in the correction amount storage unit 116 (No in S104), and thus the process proceeds to step S105.

  In step S105, the correction amount calculation unit 113 calculates a correction amount for the reference position. Basically, the correction amount is calculated so that the correction is performed in the fingertip direction with respect to the reference position. The fingertip direction is usually the upper direction of the touch panel 14. In the XY plane shown in FIG. 4, the Y coordinate is a direction that increases.

  Examples of the correction amount calculation formula include the following formula. ΔX is a correction amount in the X direction. ΔY is a correction amount in the Y direction.

ΔX = d × cos θ
ΔY = d × sin θ
Subsequently, the correction amount calculation unit 113 stores the calculated correction amount (ΔX, ΔY) in the correction amount storage unit 116 (S107).

  Subsequently, the correction unit 114 corrects the indicated position specified by the reference position (the center of gravity position G) using the correction amount stored in the correction amount storage unit 116 (S108). The correction is performed, for example, by performing the following calculation.

X coordinate value of indicated position P after correction = Xg + ΔX
Y coordinate value of indicated position P after correction = Xg + ΔY
As a result, the coordinate value of the designated position is corrected as shown in FIG. 5, for example. FIG. 5 is a diagram illustrating a correction example of the designated position. As shown in FIG. 5, the indicated position is corrected to the fingertip side. A coordinate value corresponding to the corrected designated position P is notified to the upper unit 115. By correcting the designated position to the fingertip side, the fingertip can be set as the designated position even when the fingertip is touched.

  Subsequently, the contact area specifying unit 111 waits until the set of sensor coordinates input from the input device 16 changes (S108). When the set of sensor coordinates changes (Yes in S108), the contact area specifying unit 111 determines whether or not the contact state has been released, that is, whether or not touch-up has been performed (S109). Touch-up means that a finger that has been touched is separated from the touch panel 14. Whether or not it is a touch-up can be determined by determining whether or not the set of sensor coordinates input from the input device 16 is empty, for example.

  If it is not touch-up (No in S109), the mobile terminal 10 repeats step 102 and subsequent steps. The case where it is not touch-up is a case where the position of the contact object moves while the contact state is maintained. For example, this is a case where the user slides the finger while touching the touch panel 14.

  When step S102 and subsequent steps are repeated, the correction amount is stored in the correction amount storage unit 116 (Yes in S104). Therefore, the correction amount is not calculated again. Therefore, in step S107, the indicated position is corrected using the correction amount calculated first.

  In other words, while the contact area is moving while the contact object is maintained in the contact state, when the contact of the contact object is detected (according to the detection of the contact of the contact object), the indicated position is Is corrected. However, the correction amount is not necessarily calculated when the contact object comes into contact, but may be a correction amount calculated within a predetermined period after the contact of the contact object is detected. For example, the correction amount may change during the predetermined period, and the correction amount may be constant after the predetermined period. In this case, the correction amount used after the predetermined period may be a correction amount calculated at any point in the predetermined period, or the correction amount for the predetermined period such as an average value of the correction amount for the predetermined period. May be a function value for.

  When the contact state of the contact object is released, that is, when touch-up is performed (Yes in S109), the correction unit 114 deletes the correction amount stored in the correction amount storage unit 116 (S110).

  As described above, according to the present embodiment, the indicated position is corrected by a certain correction amount while the contact state is maintained after the contact object comes into contact. Accordingly, with respect to the trajectory of the contact object, the deviation between the shape before correction and the shape after correction can be reduced. This point will be described with reference to the drawings.

  FIG. 6 is a diagram illustrating a correction example according to the present embodiment when the touched finger moves linearly. FIG. 6 shows an example in which the finger slides linearly from left to right. That is, an example in which the contact area is changed as A1 → A2 → A3 is shown.

  In the contact area A1, the position of the center of gravity is indicated by G1. The corrected indicated position is indicated by P1. In the contact area A2, the position of the center of gravity is indicated by G2. The corrected indicated position is indicated by P2. In the contact area A3, the center of gravity is indicated by G3. Also, the corrected indicated position is indicated by P3.

  A trajectory t0 indicates the trajectory of the center of gravity before correction. The trajectory t1 indicates the trajectory of the designated position after correction. In the present embodiment, since the correction amount is constant while the contact state is maintained, when the finger moves linearly, the corrected trajectory t1 is also linear.

  Therefore, the possibility that the corrected trajectory shape has a large deviation from the trajectory shape intended by the user (for example, a substantially straight line) is reduced.

  On the other hand, FIG. 7 is a diagram showing a correction example when the correction value changes according to the shape of the contact area. FIG. 7 shows an example in which the correction amount increases as the area of the contact region increases. In FIG. 7, objects having the same meaning as in FIG. 6 are denoted with the same reference numerals.

  In FIG. 7, since the contact area A2 is smaller than the contact area A1, the correction amount is smaller than the correction amount in the contact area A1. In the example of FIG. 7, an example in which the correction amount in the contact area A2 is 0 is shown. Further, since the contact area A3 is larger than the contact area A1, the correction amount is larger than the correction amount in the contact area A1.

  As a result, even if the trajectory t0 before correction is linear, the shape of the corrected trajectory t1 is not linear. That is, the trajectory t1 is not substantially parallel to the trajectory t0.

  Thus, when the correction amount changes while the contact state is maintained, there is a possibility that the shape of the trajectory after correction has a large deviation from the shape of the trajectory intended by the user (for example, a substantially straight line). , Get higher.

  Note that the present embodiment may be applied to a touch panel of an electronic device other than a mobile terminal such as a digital camera or an in-vehicle device.

  In addition, as long as the input device has a contact surface, the present embodiment may be applied to an input device other than the touch panel, such as a touch pad provided in a notebook PC or the like. In other words, the present embodiment may be applied to an electronic component that does not include a display device and includes an input device having a contact surface.

  In the present embodiment, the mobile terminal 10 is an example of a correction device.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to such specific embodiment, In the range of the summary of this invention described in the claim, various deformation | transformation・ Change is possible.

10 Mobile terminal 11 CPU
12 Memory 13 Auxiliary Storage Device 14 Touch Panel 15 Display Device 16 Input Device 17 Touch Control IC
111 Contact area identification unit 112 Center of gravity position calculation unit 113 Correction amount calculation unit 114 Correction unit 115 Upper unit 116 Correction amount storage unit

Claims (3)

An input unit for detecting contact of an object with the contact surface;
A processor, and
The processor is
Based on the shape of the contact area of the object with respect to the contact surface, the indicated position by the object is calculated,
Based on the shape of the contact area within a predetermined time after the contact of the object is detected, a correction amount related to the indicated position is calculated,
A correction apparatus that corrects the indicated position calculated while the contact state of the object is maintained with the same correction amount. In an electronic device having an input unit that detects contact of an object with a contact surface,
Based on the shape of the contact area of the object with respect to the contact surface, the indicated position by the object is calculated,
Based on the shape of the contact area within a predetermined time after the contact of the object is detected, a correction amount related to the indicated position is calculated,
The correction program which performs the process which correct | amends by the same said correction amount about the said indication position calculated while the contact state of the said object is maintained. An electronic device having an input unit that detects contact of an object with a contact surface,
Based on the shape of the contact area of the object with respect to the contact surface, the indicated position by the object is calculated,
Based on the shape of the contact area within a predetermined time after the contact of the object is detected, a correction amount related to the indicated position is calculated,
A correction method for executing a process of correcting the indicated position calculated while the contact state of the object is maintained with the same correction amount.

Images