POSITION INFORMATION CORRECTION DEVICE, POSITION INFORMATION CORRECTION METHOD, AND PROGRAM

• US 20120235952A1
• Filed: 02/24/2012
• Published: 09/20/2012
• Est. Priority Date: 03/18/2011
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: KIKUCHI, Naoki
• Granted Patent: US 8,913,032 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

There is provided a position information correction device including an input point acquisition section which acquires position information of an input point specified by an operating object, a direction detection section which detects a movement direction of the operating object based on displacement of the position information acquired by the input point acquisition section for each input point, a determination section which takes a majority vote of the movement directions of past input points acquired by the input point acquisition section in the past, and determines the movement direction of the operating object with respect to a current input point acquired by the input point acquisition section at a current time point, and a position information correction section which, when the movement direction detected by the direction detection section differs from the movement direction determined by the determination section, corrects position information of the current input point.

Claims

1. A position information correction device comprising:

an input point acquisition section which acquires position information of an input point specified by an operating object;

a direction detection section which detects a movement direction of the operating object based on displacement of the position information acquired by the input point acquisition section for each input point;

a determination section which takes a majority vote of the movement directions, which are detected by the direction detection section, of past input points acquired by the input point acquisition section in the past, and determines the movement direction of the operating object with respect to a current input point acquired by the input point acquisition section at a current time point; and

a position information correction section which, when the movement direction detected by the direction detection section differs from the movement direction determined by the determination section, corrects position information of the current input point.

2. The position information correction device according to claim 1, further comprising

a reference region setting section which sets a reference region including the current input point,

wherein the determination section determines the movement direction of the operating object based on a movement direction of a past input point included within the reference region.

3. The position information correction device according to claim 2,

wherein the input point acquisition section acquires position information of the operating object that comes into contact with or comes close to a touch sensor, and

wherein the reference region setting section sets the reference region having a size in accordance with device characteristics of the touch sensor.

4. The position information correction device according to claim 2,

wherein the reference region setting section sets the reference region having a predetermined size in accordance with a resolution of the touch sensor.

5. The position information correction device according to claim 2,

wherein the touch sensor is a capacitive touch sensor, and

wherein the reference region setting section increases a size of the reference region as the reference region is nearer to a grid boundary of the touch sensor.

6. The position information correction device according to claim 1,

wherein the position information correction section corrects the position information of the current input point based on position information of an input point that is acquired immediately prior to the current input point.

7. The position information correction device according to claim 6,

wherein the position information correction section corrects the position information in a manner that the position information of the current input point becomes equal to the position information of the input point that is acquired immediately prior to the current input point.

8. The position information correction device according to claim 1, further comprising

a movement distance determination section which determines a movement distance of the current input point based on a movement distance of a past input point,

wherein the position information correction section corrects the position information of the current input point using the movement distance determined by the movement distance determination section.

9. The position information correction device according to claim 8,

wherein the movement distance determination section determines the movement distance of the current input point by taking a majority vote of the movement distances of the past input points.

10. The position information correction device according to claim 9,

wherein the movement distance determination section determines the movement distance of the current input point by taking a majority vote of the movement distances of the past input points at a segment width corresponding to a degree of variation of the movement distances of the past input points.

11. The position information correction device according to claim 8,

wherein the movement distance determination section calculates a probability distribution of movement distances of the current input point based on the movement distance of the past input point, and sets a movement distance having the highest probability distribution as the movement distance of the current input point.

12. A position information correction method comprising:

acquiring position information of an input point specified by an operating object;

detecting a movement direction of the operating object based on displacement of the acquired position information for each input point;

taking a majority vote of the detected movement directions of past input points acquired in the past, and determining the movement direction of the operating object with respect to a current input point acquired at a current time point; and

correcting position information of the current input point when the detected movement direction differs from the determined movement direction.

13. A program for causing a computer to function as a position information correction device which includes

an input point acquisition section which acquires position information of an input point specified by an operating object,

a direction detection section which detects a movement direction of the operating object based on displacement of the position information acquired by the input point acquisition section for each input point,

a determination section which takes a majority vote of the movement directions, which are detected by the direction detection section, of past input points acquired by the input point acquisition section in the past, and determines the movement direction of the operating object with respect to a current input point acquired by the input point acquisition section at a current time point, and

a position information correction section which, when the movement direction detected by the direction detection section differs from the movement direction determined by the determination section, corrects position information of the current input point.