Apparatus and method for inputting character using touch screen in portable terminal

• US 8,610,669 B2
• Filed: 06/07/2007
• Issued: 12/17/2013
• Est. Priority Date: 10/29/2003
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Huh, Jung-Chul
• Primary Examiner(s): Nguyen, Kevin M
• Application Number:
  US11/759,714
• Publication Number:
  US 20070229476A1
• Time in Patent Office: 2,385 Days
• Field of Search: 345/173, 715/773, 715/769, 341/22
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04805 Virtual magnifying lens, i.e. window or frame movable on top of displayed information to enlarge it for better reading or selection
• CPC Class Codes: G06F 3/02 Input arrangements using manually operated switches, e.g. using keyboards or dials
• CPC Class Codes: G06F 3/0233 Character input methods
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04845 for image manipulation, e.g. dragging, rotation, expansion or change of colour
• 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
• CPC Class Codes: G06F 3/04895 Guidance during keyboard input operation, e.g. prompting
• CPC Class Codes: G09G 5/26 for modifying the character dimensions, e.g. double width, double height
• CPC Class Codes: H04M 1/0266 for a display module assembly

Abstract

Provided are an apparatus and method for inputting characters in a portable terminal. The method for inputting characters in a portable terminal includes the steps of: performing a soft keyboard when in a character input mode; recognizing a character touched on the soft keyboard; displaying the recognized character enlarged and displaying one or more recommended words formed by combining characters which have been touched so far in a predetermined screen area; and inputting the character displayed enlarged to a main screen area upon detecting the release of touch.

Claims

1. A method of inputting characters in a portable terminal, comprising the steps of:

displaying a plurality of characters on a soft keyboard in a character input mode;

detecting a touch on the soft keyboard;

displaying one character corresponding to a key of the soft keyboard corresponding to the touch as enlarged relative to other characters upon detecting the touch on the soft keyboard;

displaying the character in a main screen area upon detecting a release of the touch on the soft keyboard; and

displaying one or more recommended words in a predetermined screen area based on characters which have been inputted so far.

2. The method of claim 1, wherein the character input mode is selected from a group comprising of a message editing mode, an e-mail editing mode, a Web browsing mode, and a messenger mode.

3. The method of claim 1, wherein the soft keyboard is a QWERTY key board.

4. The method of claim 1, wherein the release of touch is detected when a user'"'"'s finger or its equivalent is released from the soft keyboard, or when a next touch is detected, or when the touch is maintained over a predetermined length of time.

5. The method of claim 1, wherein the character is enlargely displayed near its corresponding key button or in a predetermined portion of the main screen area.

6. The method of claim 1, further comprising:

selecting one of the recommended words; and

displaying the selected recommended word in the main screen area.

7. The method of claim 1, further comprising, when the character is displayed in the main screen area, generating a specific effect selected from a group comprising of a vibration effect, a sound effect, and a graphic effect.

8. The method of claim 1, wherein the portable terminal is a pocket-sized communication terminal.

9. An apparatus for inputting characters in a portable terminal, comprising:

a touch screen for detecting a touch or a release of a touch on a soft keyboard displayed on the touch screen in a character input mode, for generating a touch signal upon detecting the touch, and for displaying a plurality of characters on the touch screen; and

a controller for determining one character based on the generated touch signal, for controlling the touch screen to display the determined character on the touch screen as enlarged relative to other characters of the soft keyboard upon detecting the touch signal, for controlling the touch screen to display one or more recommended words in a predetermined screen area based on characters which have been inputted so far, and for controlling the touch screen to display the character in a main screen area of the touch screen when the touch screen detects the release of the touch.

10. The apparatus of claim 9, wherein the character input mode is selected from a group comprising of a message editing mode, an e-mail editing mode, a Web browsing mode, and a messenger mode.

11. The apparatus of claim 9, wherein the release of touch is detected when a user'"'"'s finger or its equivalent is released from the soft keyboard, or when a next touch is detected, or when the touch is maintained over a predetermined length of time.

12. The apparatus of claim 9, wherein the enlarged character is displayed near its corresponding key button or in a predetermined portion of the main screen area.

13. The apparatus of claim 9, wherein the controller controls the touch screen to display the selected recommended word in the main screen area when one of the recommended words is selected.

14. The apparatus of claim 10, wherein the portable terminal is a pocket-sized communication terminal.

15. A method of inputting characters in a portable terminal, comprising the steps of:

displaying a plurality of characters on a soft keyboard in a character input mode;

detecting a touch on the soft keyboard;

displaying one character corresponding to a key of the soft keyboard corresponding to the touch as enlarged relative to other characters upon detecting the touch on the soft keyboard;

displaying the character, which has been displayed enlarged when detecting a release of the touch, in a main screen area upon detecting a release of the touch on the soft keyboard; and

displaying one or more recommended words in a predetermined screen area based on characters which have been inputted so far.