CONTROLLING A CURSOR ON A TOUCH SCREEN

• US 20140002393A1
• Filed: 06/24/2013
• Published: 01/02/2014
• Est. Priority Date: 06/29/2012
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Chen, Jian, Ma, Rui, Su, Zhong, Bao, Sheng Hua, Lu, Chengen, Wang, Rui
• Granted Patent: US 9,104,305 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

In one embodiment, a method for controlling a cursor on a touch screen includes, in response to having entered a pointing mode, displaying the cursor on the touch screen; in response to a touch on the touch screen, calculating a movement velocity of a touch point of the touch; and controlling the movement of the cursor according to the movement velocity of the touch point; wherein at any moment in the pointing mode, an input area of the touch point is any area within the touch screen.

Claims

1. A method for controlling a cursor on a touch screen, the method comprising:

in response to having entered a pointing mode, displaying the cursor on the touch screen;

in response to a touch on the touch screen, calculating a movement velocity of a touch point of the touch; and

controlling the movement of the cursor according to the movement velocity of the touch point;

wherein at any moment in the pointing mode, an input area of the touch point is any area within the touch screen.

2. The method according to claim 1, wherein the controlling the movement of the cursor according to the movement velocity of the touch point comprises:

determining a location of the cursor according to the movement velocity of the touch point of the touch; and

refreshing the cursor at the location.

3. The method according to claim 1, further comprising:

calculating touch force of the touch; and

controlling the movement of the cursor based on the touch force.

4. The method according to claim 3, wherein the controlling the movement of the cursor based on the touch force comprises:

setting the movement velocity of the cursor to be in direct proportion to the touch force.

5. The method according to claim 4, wherein the calculating touch force of the touch comprises:

calculating the touch force of the touch based on feedback from a pressure sensor on the touch screen; and

/or

calculating the touch force of the touch based on a contact area with the touch screen.

6. The method according to claim 5, wherein the touch force is in direct proportion to the contact area with the touch screen.

7. The method according to claim 6, wherein the determining a location of the cursor according to the movement velocity of the touch point of the touch comprises:

setting a proportion factor to adjust a relationship between the location of the cursor and the movement velocity of the touch point.

8. The method according to claim 7, wherein the location of the cursor is determined using the formula:

p_T=p₀+∫

₀^T aW_tS_t{right arrow over (v)}_tdt

where p₀ represents a previous location of the cursor, a represents the proportion factor, W_t represents the feedback from the pressure sensor at moment t, S_t represents the contact area with the touch screen at moment t, and {right arrow over (v)}_t represents the movement velocity of the touch point to the touch screen at moment t.

9. The method according to claim 1, further comprising:

in response to having clicked on the touch screen, activating an item which is displayed on the touch screen and at which the cursor points.

10-18. -18. (canceled)