Touch screen and display method
AssigneeSamsung Electronics Co., Ltd.
InventorHyunwoo Kim
Life of this patent
Estimating the term…
Abstract
A touch screen to smooth a moving trajectory of a touch unit input as a curved line and to display the moving trajectory, and a display method of the touch screen are provided. The display method of the touch screen may include sampling coordinates at touch points when a touch unit moves on a touch screen, determining whether a moving trajectory of the touch unit is a curved line according to inclination between the coordinates, and fitting the sampled coordinates to a curve and displaying the fitted curve on the touch screen upon determining that the moving trajectory of the touch unit is the curved line.
Claims16
A display method of a touch screen device, comprising:
- sampling coordinates at touch points when a touch unit moves on a touch screen;
- determining whether a moving trajectory of the touch unit is a curved line according to inclination between the sampled coordinates;
- and
- creating type-A control points, each of which is created by calculating a middle position between two contact points on a tangent line, wherein the two contact points are contact points by the tangent line of neighboring sampled coordinates upon determining that the moving trajectory of the touch unit is the curved line, and the neighboring sampled coordinates are circles corresponding to pressure;
- creating type-B control points, each of which is created by intersecting two neighboring tangent lines of the sampled coordinates;
- creating a simultaneously smoothed piece to create a closed path configured by straight and curved lines using the type-A control points and the type-B control points, wherein the curve lines pass through the type-A control points and the curve lines are influenced by but do not pass through the type-B control points;
- and
- displaying the simultaneously smoothed piece connected to the old simultaneously smoothed piece.
A touch screen device comprising:
- a sensor to sense touch;
- a controller
- to sample the sensed touch positions as coordinates,
- to determine whether a moving trajectory of the touch unit is a curved line according to inclination between the sampled coordinates,
- to create type-A control points, each of which is created by calculating a middle position between two contact points on a tangent line, wherein the two contact points are contact points by the tangent line of neighboring sampled coordinates upon determining that the moving trajectory of the touch unit is the curved line, and the neighboring sampled coordinates are circles corresponding to pressure,
- to create type-B control points, each of which is created by intersecting two neighboring tangent lines of the sampled coordinates;
- and
- to create a simultaneously smoothed piece to create a closed path configured by straight and curved lines using the type-A control points and the type-B control points, wherein the curve lines pass through the type-A control points and the curve lines are influenced by but do not pass through the type-B control points;
- and
- a display unit to display the simultaneously smoothed piece connected to the old simultaneously smoothed piece.
Dependencies are inferred from the claim text.