OPERATION METHOD FOR TOUCH PANEL OF PORTABLE TERMINAL AND PORTABLE TERMINAL SUPPORTING THE SAME

• US 20110291967A1
• Filed: 05/25/2011
• Published: 12/01/2011
• Est. Priority Date: 05/25/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JUNG, Gong Hwan
• Application Number:
  US13/115,392
• Publication Number:
  US 20110291967A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184

Abstract

An operation method for a touch panel of a portable terminal and a portable terminal supporting the same are provided. The operation method for a touch panel of a portable terminal includes activating the touch panel, collecting touch-down events from the activated touch panel, acquiring a vertical synchronous signal for driving a display unit, and performing a polling of the touch panel in unit of predefined time-periods based on the vertical synchronous signal.

Claims

1. An operation method for a touch panel of a portable terminal, the method comprising:

activating the touch panel;

collecting touch-down events from the activated touch panel;

acquiring a vertical synchronous signal for driving a display unit; and

performing a polling of the touch panel in unit of predefined time-periods based on the vertical synchronous signal.

2. The method of claim 1, wherein the acquiring of the vertical synchronous signal comprises:

calling a Vertical_SYNChronization (V_SYNC) interrupt handler function for generating the vertical synchronous signal; and

collecting the vertical synchronous signal generated from the V_SYNC interrupt handler function.

3. The method of claim 2, wherein the performing of the polling of the touch panel comprises:

collecting information of the touch-down events on the touch panel; and

updating the touch-down events information using the V_SYNC interrupt handler function for every vertical synchronous signal generation time generated in units of time-periods.

4. The method of claim 1, further comprising:

testing an occurrence of a touch cancellation event; and

stopping the acquiring of the vertical synchronous when the touch cancellation event occurs.

5. The method of claim 4, further comprising stopping the polling of the touch panel when the touch cancellation event occurs.

6. The method of claim 1, further comprising assigning a task for the polling according to the vertical synchronous signal after the touch-down events occur.

7. A portable terminal with a touch panel, the terminal comprising:

a display unit for outputting a screen configuring element supporting a function according to activation of the function;

a touch panel disposed at an upper portion of the display unit for generating a touch event according to touch input of a user; and

a control unit for controlling execution of a polling of the touch panel based on a vertical synchronous signal supported on the display unit when a touch-down event occurs on the touch panel.

8. The terminal of claim 7, wherein the polling includes collecting information of the touch-down event on the touch panel and updating the touch-down event information using a Vertical_SYNChronization (V_SYNC) interrupt hander function for every vertical synchronous signal generation time generated in units of time-periods.

9. The terminal of claim 7, wherein the control unit tests whether a touch cancellation event cancelling a touch-down event generated on the touch panel occurs, and stops acquisition of the vertical synchronous signal when the touch cancellation event occurs.

10. The terminal of claim 7, wherein the control unit stops the polling of the touch panel when the touch cancellation event occurs.

11. The terminal of claim 7, wherein the control unit calls a V_SYNC interrupt hander function to acquire the vertical synchronous signal.

12. The terminal of claim 11, wherein the control unit cancels the V_SYNC interrupt hander function called to acquire the vertical synchronous signal when the touch cancellation event occurs.

13. The terminal of claim 7, wherein the control unit controls task assignment for the polling of the touch panel according to the vertical synchronous signal after the touch-down event occurs.