Touch input apparatus and method in user terminal

• US 9,158,397 B2
• Filed: 11/21/2012
• Issued: 10/13/2015
• Est. Priority Date: 11/23/2011
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Ji-Hoon, Kim, Jung-Rim
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): WILLS-BURNS, CHINEYERE D
• Application Number:
  US13/683,494
• Publication Number:
  US 20130127758A1
• Time in Patent Office: 1,056 Days
• Field of Search: 715/767, 345/175, 345/173, 345/174
• US Class Current: 1/1
• 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 display screen for receiving a touch input according to a touch of a user;

a processor for entering a drawing mode according to the touch input, determining one of a single touch input and a multi-touch input, performing a touch point sampling according to a single touch movement when there is a single touch input and providing a sample point, performing drawing on the display screen along the sample point, entering a multi-touch mode when there is a multi-touch input, and performing a multi-touch action including at least one of an enlargement, a reduction, a movement of a drawing displayed on the display screen according to a multi-touch movement, performing a simplification for the sampled sample points in accordance with a sampling rate of the sampled touch point before the enlargement according to an enlargement magnification, and providing the simplified sample points when the single touch movement is generated in a state of the enlargement.

2. The touch input apparatus of claim 1, the processor further comprising a drawing unit for performing the drawing by using the provided sample points.

3. The touch input apparatus of claim 1, wherein the touch point sampling simplifying unit performs the simplification for the sampled sample points by using a batch simplification method.

4. The touch input apparatus of claim 1, wherein the touch point sampling simplifying unit performs the simplification for the sampled sample points by using an online simplification method.

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

receiving a touch input on a display screen according to a touch of a user;

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

performing a touch point sampling when there is a single touch input and providing a sample point and performing drawing along the sample point;

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 displayed on the display screen according to a multi-touch movement when there is a multi-touch input; and

when the single touch movement is generated in a state of the enlargement performing a simplification for the sampled sample points in accordance with a sampling rate of the sampled touch point before the enlargement according to an enlargement magnification and providing the simplified sample points.

6. The touch input method of claim 5, further comprising performing the drawing by using the provided sample points.

7. The touch input method of claim 5, wherein performing the simplification for the sampled sample points comprises performing the simplification for the sampled sample points by using a batch simplification method.

8. The touch input method of claim 5, wherein performing the simplification for the sampled sample points comprises performing the simplification for the sampled sample points by using an online simplification method.