System and method for improving recognition of a touch keyboard of an electronic device

• US 8,896,551 B2
• Filed: 06/24/2011
• Issued: 11/25/2014
• Est. Priority Date: 04/01/2011
• Status: Active Grant

• Current Assignee: FIH (Hong Kong) Limited (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: FIH (Hong Kong) Limited (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yu, Yi-Chun
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Application Number:
  US13/167,716
• Publication Number:
  US 20120249434A1
• Time in Patent Office: 1,250 Days
• Field of Search: 345/156, 345/168, 345/169, 345/173, 345/174, 715/773, 715/863, 715/864
• US Class Current: 345/173
• 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 system and a method for improving recognition of a touch keyboard in an electronic device include setting a fuzzy set corresponding to each virtual key of the touch keyboard displayed on a touch panel. The improving method further includes receiving coordinates of a touch point on the touch panel, confirming a touched virtual key corresponding to the touched coordinates and executing a function of the touched virtual key. The improving method further confirming one or more adjacent virtual keys of the touched virtual key, and revising a fuzzy set of the received virtual key or a fuzzy set of an adjacent virtual key, if a backspace virtual key and the adjacent virtual key have been touched in turn after the touched virtual key.

Claims

1. An electronic device, comprising:

a storage system;

a touch panel;

at least one processor;

one or more programs that are stored in the storage system and are executed by the at least one processor, the one or more programs comprising;

a definition module that defines and stores a fuzzy set corresponding to each virtual key of a touch keyboard displayed on the touch panel, wherein the fuzzy set corresponding to each virtual key defines a plurality of membership functions of each virtual key;

a receiving module that receives coordinates of a touch point on the touch panel;

a confirmation module that confirms at least one membership function in the fuzzy set according to the received coordinates for obtaining at least one non-zero membership value, confirms a virtual key corresponding to the received coordinates according to fuzzy sets of virtual keys of the touch keyboard, and determines the virtual key as a touched virtual key and the received coordinates as touched coordinates, wherein the virtual key is confirmed by the one non-zero membership function value from the plurality of the fuzzy sets according to the received coordinates when a number of the at least one non-zero membership function value is one, and the virtual key is confirmed by the larger non-zero membership function value in the two non-zero membership function values when the number of the at least one non-zero membership function value is two;

a processing module that executes a function corresponding to the touched virtual key on the virtual keyboard;

the confirmation module further confirms one or more adjacent virtual keys of the touched virtual key, after the function of the touched virtual key is executed;

the processing module further revises a fuzzy set of the touched virtual key or a fuzzy set of one of the adjacent virtual keys, upon the condition that a backspace virtual key of the touch keyboard and the adjacent virtual key have been touched in turn after the touched virtual key.

2. The electronic device as claimed in claim 1, wherein the one or more programs further comprises a determination module that determines whether inputs of the virtual keys have been finished.

3. The electronic device as claimed in claim 1, wherein each of the membership functions corresponds to an x interval and a y interval of a coordinate system based on the touch panel.

4. The electronic device as claimed in claim 1, wherein the one or more adjacent virtual keys of the touched virtual key have an intersection on x intervals with the touched virtual key.

5. The electronic device as claimed in claim 4, wherein the processing module revises the fuzzy sets by:

validating the number of the non-zero membership function value corresponding to the touched coordinates;

maintaining the fuzzy set of the touched virtual key and the fuzzy set of the adjacent virtual key, upon the condition that the number of the non-zero membership function value corresponding to touched coordinates is one;

or

confirming whether the maximum membership function value is equal to “

1”

, upon the condition that the number of the non-zero membership function value corresponding to touched coordinates is two;

calculating a new membership function of the touched virtual key according to the touched coordinates, in response to that the maximum membership function value is equal to “

1”

;

or

calculating a new membership function of the adjacent virtual key according to the touched coordinates, in response to that the maximum membership function value is not equal to “

1”

; and

calculating new intervals in the fuzzy set of the touched virtual key, or new intervals in the fuzzy set of the adjacent virtual key;

updating the fuzzy set of the touched virtual key or the fuzzy set of the adjacent virtual key according to the new membership and the new intervals.

6. A method for improving recognition of a touch keyboard in an electronic device, the electronic device comprising a storage system, a touch panel and at least one processor, the method comprising:

defining and storing a fuzzy set corresponding to each virtual key of a touch keyboard displayed on the touch panel, wherein the fuzzy set corresponding to each virtual key defines a plurality of membership functions of each virtual key;

receiving coordinates of a touch point on the touch panel;

confirming at least one membership function in the fuzzy set according to the received coordinates for obtaining at least one non-zero membership value, and confirming a virtual key corresponding to the received coordinates according to fuzzy sets of virtual keys of the touch keyboard, determining the virtual key as a touched virtual key and the received coordinates as touched coordinates, wherein the virtual key is confirmed by the one non-zero membership function value from the plurality of the fuzzy sets according to the received coordinates when a number of the at least one non-zero membership function value is one, and the virtual key is confirmed by the larger non-zero membership function value in the two non-zero membership function values when the number of the at least one non-zero membership function value is two;

executing a function corresponding to the touched virtual key on the virtual keyboard;

confirming one or more adjacent virtual keys of the touched virtual key, after the function of the touched virtual key is executed;

revising a fuzzy set of the touched virtual key or a fuzzy set of one of the adjacent virtual keys, upon the condition that a backspace virtual key and the adjacent virtual key have been touched in turn after the touched virtual key.

7. The method as claimed in claim 6, further comprising:

determining whether inputs of the virtual keys have been finished.

8. The method as claimed in claim 6, wherein each of the membership functions corresponds to an x interval and a y interval of a coordinate system based on the touch panel.

9. The method as claimed in claim 6, wherein the one or more adjacent virtual keys of the touched virtual key have an intersection on x intervals with the touched virtual key.

10. The method as claimed in claim 9, wherein the fuzzy sets are revises by:

validating the number of the non-zero membership function value corresponding to the touched coordinates;

maintaining the fuzzy set of the touched virtual key and the fuzzy set of the adjacent virtual key, upon the condition that the number of the non-zero membership function value corresponding to touched coordinates is one;

or

confirming whether the maximum membership function value is equal to “

1”

, upon the condition that the number of the non-zero membership function value corresponding to touched coordinates is two;

calculating a new membership function of the touched virtual key according to the touched coordinates, in response to that the maximum membership function value is equal to “

1”

;

or

calculating a new membership function of the adjacent virtual key according to the touched coordinates, in response to that the maximum membership function value is not equal to “

1”

; and

calculating new intervals in the fuzzy set of the touched virtual key, or new intervals in the fuzzy set of the adjacent virtual key;

updating the fuzzy set of the touched virtual key or the fuzzy set of the adjacent virtual key according to the new membership and the new intervals.

11. A non-transitory computer readable storage medium storing a set of instructions, the set of instructions capable of executed by a processor to perform a method for improving recognition of a touch keyboard in an electronic device, the method comprising:

defining and storing a fuzzy set corresponding to each virtual key of the touch keyboard displayed on a touch panel of the electronic device, wherein the fuzzy set corresponding to each virtual key defines a plurality of membership functions of each virtual key;

receiving coordinates of a touch point on the touch panel;

confirming at least one membership function in the fuzzy set according to the received coordinates for obtaining at least one non-zero membership value, and confirming a virtual key corresponding to the received coordinates according to fuzzy sets of virtual keys of the touch keyboard, determining the virtual key as a touched virtual key and the received coordinates as touched coordinates, wherein the virtual key is confirmed by the one non-zero membership function value from the plurality of the fuzzy sets according to the received coordinates when a number of the at least one non-zero membership function value is one, and the virtual key is confirmed by the larger non-zero membership function value in the two non-zero membership function values when the number of the at least one non-zero membership function value is two;

executing a function corresponding to the touched virtual key on the virtual keyboard;

confirming one or more adjacent virtual keys of the touched virtual key, after the function of the touched virtual key is executed;

revising a fuzzy set of the touched virtual key or a fuzzy set of one of the adjacent virtual keys, upon the condition that a backspace virtual key and the adjacent virtual key have been touched in turn after the touched virtual key.

12. The storage medium as claimed in claim 11, further comprising:

determining whether inputs of the virtual keys have been finished.

13. The storage medium as claimed in claim 11, wherein each of the membership functions corresponds to an x interval and a y interval of a coordinate system based on the touch panel.

14. The storage medium as claimed in claim 11, wherein the one or more adjacent virtual keys of the touched virtual key have an intersection on x intervals with the touched virtual key.

15. The storage medium as claimed in claim 14, wherein the fuzzy sets are revises by:

validating the number of the non-zero membership function value corresponding to the touched coordinates;

maintaining the fuzzy set of the touched virtual key and the fuzzy set of the adjacent virtual key, upon the condition that the number of the non-zero membership function value corresponding to touched coordinates is one;

or

confirming whether the maximum membership function value is equal to “

1”

, upon the condition that the number of the non-zero membership function value corresponding to touched coordinates is two;

calculating a new membership function of the touched virtual key according to the touched coordinates, in response to that the maximum membership function value is equal to “

1”

;

or

calculating a new membership function of the adjacent virtual key according to the touched coordinates, in response to that the maximum membership function value is not equal to “

1”

; and

calculating new intervals in the fuzzy set of the touched virtual key, or new intervals in the fuzzy set of the adjacent virtual key;

updating the fuzzy set of the touched virtual key or the fuzzy set of the adjacent virtual key according to the new membership and the new intervals.