Mobile terminal having touch screen and method for displaying cursor thereof

• US 8,643,623 B2
• Filed: 04/02/2013
• Issued: 02/04/2014
• Est. Priority Date: 07/28/2008
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Jin Woo, Ji, Won Joo
• Primary Examiner(s): Abdulselam, Abbas
• Assistant Examiner(s): Sadio, Insa
• Application Number:
  US13/855,316
• Publication Number:
  US 20130222240A1
• Time in Patent Office: 308 Days
• Field of Search: 345/156, 345/157, 345173-183, 178 1805- 1807, 715/856
• 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
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus

Abstract

A portable terminal including a touch screen and method for displaying a cursor thereof are provided. The method includes determining whether a capacitance is equal to or greater than a first critical value and is less than a second critical value, if the change of the capacitance is sensed in the touch screen, displaying a cursor in an area where the change of the capacitance is sensed, if the capacitance is equal to or greater than the first critical value and is less than the second critical value, and performing a function corresponding to the area where the cursor is displayed, if the capacitance sensed in the area where the cursor is displayed is equal to or greater than the second critical value.

Claims

1. A method comprising:

measuring a change of capacitance associated with a user input approaching a display of an electronic device;

determining whether the user input is within a proximity range of the display of the electronic device based on the change of capacitance;

displaying a Graphical User Interface (GUI) object at a location of the display of the electronic device according to whether the user input is within the proximity range of the display of the electronic device;

determining whether the user input is within a touch range of the display of the electronic device based on the change of capacitance; and

performing a function at the location according to whether the user input is within the touch range of the display of the electronic device.

2. The method of claim 1, wherein displaying the GUI object comprises:

displaying a cursor at the location of the display of the electronic device as an indication.

3. The method of claim 1, wherein displaying the GUI object comprises:

displaying, as an indication, a corresponding one of a plurality of colored cursors based on an increase or decrease of a degree of the change of capacitance.

4. The method of claim 3, wherein the plurality of colored cursors comprises:

at least one of a dark colored cursor and a light colored cursor.

5. The method of claim 1, wherein displaying the GUI object comprises:

displaying, as an indication, a corresponding one of a plurality of cursors of different sizes based on an increase or decrease of a degree of the change of capacitance.

6. The method of claim 1, wherein the user input is determined to be within the proximity range

when a degree of the change of capacitance is within a first range that is predetermined.

7. The method of claim 6, further comprising:

determining at least one of a first range or a second range based on another user input.

8. The method of claim 1, wherein performing the function at the location comprises:

executing an application corresponding to the location.

9. The method of claim 1, wherein the change of capacitance is measured based on a peak compare method.

10. The method of claim 1, wherein the change of capacitance is measured based on a frequency conversion method.

11. The method of claim 1, wherein the user input is determined to be within the proximity range when a degree of the change of capacitance is greater than a first threshold value.

12. The method of claim 11, wherein the user input is determined to be within the touch range when the degree of the change of capacitance is greater than a second threshold value.

13. An apparatus comprising:

a display unit configured to receive a user input; and

a controller configured to;

measure a change of capacitance associated with the user input;

determine whether the user input is within a proximity range of the display unit based on the change of capacitance;

control the display unit to display a Graphical User Interface (GUI) object at a location of the display unit according to whether the user input is within the proximity range of the display unit;

determine whether the user input is within a touch range of the display unit based on the change of capacitance; and

perform a function at the location according to whether the user input is with the touch range of the display unit.

14. The apparatus of claim 13, wherein the controller is further configured to:

cause the display unit to display a cursor at the location of the display unit as an indication.

15. The apparatus of claim 13, wherein the controller is further configured to:

cause the display unit to display, as an indication, a corresponding one of a plurality of colored cursors based on an increase or decrease of a degree of the change of capacitance.

16. The apparatus of claim 13, wherein the controller is further configured to:

cause the display unit to display, as an indication, a corresponding one of a plurality of cursors of different sizes based on an increase or decrease of a degree of the change of capacitance.

17. The apparatus of claim 13, wherein the controller is further configured to:

determine, when a degree of the change of capacitance is within a first range that is predetermined, that the user input is within the proximity range; and

determine, when the degree of the change of capacitance is within a second rage that is predetermined, that the user input is within the touch range.

18. The apparatus of claim 17, wherein the controller is further configured to:

determine at least one of a first range or a second range based on another user input.

19. The apparatus of claim 13, wherein the display unit is further configured to:

detect the user input based on a user gesture.

20. The apparatus of claim 13, wherein the display unit is further configured to:

detect the user input based on a stylus input.

21. The apparatus of claim 13, wherein the controller is further configured to:

determine the change of capacitance based on a peak compare method.

22. The apparatus of claim 13, wherein the controller is further configured to:

determine the change of capacitance based on a frequency conversion method.

23. The apparatus of claim 13, wherein the controller is further configured to:

determine, when a degree of the change of capacitance is greater than a first threshold value, that the user input is within the proximity range.

24. The apparatus of claim 23, wherein the controller is further configured to:

determine, when the degree of the change of capacitance is greater than a second threshold value, that the user input is within the touch range.

25. A non-transitory machine-readable storage device storing instructions that, when executed by one or more processors, cause the one or more processors to perform operations comprising:

measuring a change of capacitance associated with a user input at a display of an electronic device;

determining whether the user input is within a proximity range of the display of the electronic device based on the change of capacitance;

displaying a Graphical User Interface (GUI) object at a location of the display of the electronic device according to whether the user input is within the proximity range of the display of the electronic device;

determining whether the user input is within a touch range of the display of the electronic device based on the change of capacitance; and

performing a function at the location according to whether the user input is within the touch range of the display of the electronic device.

26. The storage device of claim 25, wherein the operations further comprise:

displaying a cursor at the location of the display of the electronic device.