Patent ID: 9019217
Filing Date: 2015-04-28
Classification: G06F

Abstract:
1. A touch input location correction device which corrects a touch input location indicating a touch location of a user on a touch area, said device comprising: a touch location detecting unit configured to detect a set of touch point coordinates for each portion of the user which touches the touch area, the set of touch point coordinates being a set of coordinates corresponding to a touch location of the portion and found on the touch area a user operation determining unit configured to determine details of an operation carried out by the user based on the set of touch point coordinates detected by said touch location detecting unit; a touch portion shift detecting unit configured to detect a first state transition based on the set of touch point coordinates detected by said touch location detecting unit at a first time point in a time period during which said user operation determining unit determines that the portion of the user is sliding on the touch area, the first state transition showing transition from a state where the user touches the touch area with both of a first portion and a second portion of the user to a state where the user touches the touch area only with the second portion; and a touch point coordinate correcting unit configured to (i) correct a set of touch point coordinates of the second portion by adding, to the set of touch point coordinates of the second portion a difference between sets of touch point coordinates of the first portion and the second portion, detected by said touch location detecting unit before the first time point and (ii) output the corrected set of touch point coordinates as the touch input location, the correction and the output being executed after said touch portion shift detecting unit detects the first state transition in the case where the set of touch point coordinates of the first portion is outputted as the touch input location until immediately before the first time point, wherein said touch point coordinate correcting unit is configured to correct the set of touch point coordinates of the second portion by (i) holding, as a correction value, the difference between the sets of touch point coordinates of the first portion and the second portion detected by said touch location detecting unit before the first time point and (ii) adding the correction value to the set of touch point coordinates, of the second portion, observed after the first time point, and wherein said touch portion shift detecting unit is configured to: determine an estimating area based on the set of touch point coordinates of the first portion detected by said touch location detecting unit before the first time point, the estimating area indicating an area in which the first portion is estimated to touch the touch area at the first time point; and detect the first state transition in the case where (i) the set of touch point coordinates detected by said touch location detecting unit at the first time point is located outside the estimating area and (ii) at least part of a circle overlaps with the estimating area, the circle having a center positioned at the set of touch point coordinates and a radius indicated in the correction value.