Method of controlling a touch-surface control device and corresponding control device

摘要

The invention relates to a method of controlling a touch-surface control device characterized in that it comprises a step of shape recognition of a control trajectory on a touch surface from among at least two predefined shapes of trajectory, in which in the course of a predetermined duration (dT): the control trajectory is sampled in order to determine a sampled angle (dθ) of the control trajectory for each sampling period (Te), a parameter representative of the evolution of at least two sampled angles (dθ) is compared with a predetermined threshold, and a predefined trajectory shape is assigned to the control trajectory as a function of the result of the comparison. The invention also relates to a control device comprising a tough surface characterized in that it comprises a processing unit for implementing a control method as described above.

主权项

1. A method of controlling a touch-surface control device comprising recognizing a shape of a control trajectory on a touch surface from among at least two predefined trajectory shapes, wherein shape recognition comprises, in the course of a predetermined duration:
sampling the control trajectory to determine a sampled angle of the control trajectory for each sampling period; comparing a parameter representative of the evolution of at least two sampled angles with a predetermined threshold, wherein the representative parameter is a standard deviation of the sampled angles with respect to a mean of the sampled angles; assigning a predefined trajectory shape to the control trajectory as a function of a result of the comparison; determining a length of displacement of the control trajectory; comparing the length of displacement of the control trajectory with a predetermined distance; and assigning a stationary trajectory to the control trajectory if the length of displacement of the control trajectory is less than the predetermined distance, wherein a circular trajectory is assigned to the control trajectory when said representative parameter is greater than the predetermined threshold, and wherein a rectilinear trajectory is assigned to the control trajectory when said parameter is less than or equal to said threshold, wherein the circular or rectilinear trajectories allow parametrization of a control.