TOUCH INPUT APPARATUS AND METHOD IN USER TERMINAL

• US 20130127758A1
• Filed: 11/21/2012
• Published: 05/23/2013
• Est. Priority Date: 11/23/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Ji-Hoon, Kim, Jung-Rim
• Granted Patent: US 9,158,397 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A touch input apparatus and method in a user terminal is provided. The apparatus includes a touch input unit for generating a touch input event according to a touch of a user; a single or multi touch input determiner for entering a drawing mode according to the touch input event and determining one of a single touch input and a multi-touch input; a touch point sampling unit for performing a touch point sampling according to a single touch movement and providing a sample point for a drawing when there is a single touch input; and a multi-touch processor for, when there is a multi-touch input, entering a multi-touch mode and performing a multi-touch action including at least one of an enlargement, a reduction, and a movement of a drawing screen according to a multi-touch movement.

Claims

1. A touch input apparatus in a user terminal comprising:

a touch input unit for generating a touch input event according to a touch of a user;

a single or multi touch input determiner for entering a drawing mode according to the touch input event and determining one of a single touch input and a multi-touch input;

a touch point sampling unit for performing a touch point sampling according to a single touch movement and providing a sample point for a drawing when there is a single touch input; and

a multi-touch processor for, when there is a multi-touch input, entering a multi-touch mode and performing a multi-touch action including at least one of an enlargement, a reduction, and a movement of a drawing screen according to a multi-touch movement.

2. The touch input apparatus of claim 1, further comprising, when the single touch movement is generated in a state where the multi-touch action corresponding to the enlargement has been performed, a touch point sampling simplifying unit for performing a simplification for the sampled sample points and providing the simplified sample points.

3. The touch input apparatus of claim 2, further comprising a drawing unit for performing the drawing by using the provided sample points.

4. The touch input apparatus of claim 2, wherein the touch point sampling simplifying unit performs the simplification for the sampled sample points by using a batch simplification method.

5. The touch input apparatus of claim 2, wherein the touch point sampling simplifying unit performs the simplification for the sampled sample points by using an online simplification method.

6. A touch input method in a user terminal comprising:

generating a touch input event according to a touch of a user;

entering a drawing mode according to the touch input event and determining one of a single touch input and a multi-touch input;

performing a touch point sampling according to a single touch movement and providing a sample point for a drawing when there is a single touch input; and

entering a multi-touch mode and performing a multi-touch action including at least one of an enlargement, a reduction, and a movement of a drawing screen according to a multi-touch movement when there is a multi-touch input.

7. The touch input method of claim 6, further comprising, when the single touch movement is generated in a state where the multi-touch action corresponding to the enlargement has been performed, performing a simplification for the sampled sample points and providing the simplified sample points.

8. The touch input method of claim 7, further comprising performing the drawing by using the provided sample points.

9. The touch input method of claim 7, wherein performing the simplification for the sampled sample points comprises performing the simplification for the sampled sample points by using a batch simplification method.

10. The touch input method of claim 7, wherein performing the simplification for the sampled sample points comprises performing the simplification for the sampled sample points by using an online simplification method.