Lineographic alphanumeric data input system

• US 8,174,409 B2
• Filed: 09/13/2007
• Issued: 05/08/2012
• Est. Priority Date: 09/13/2007
• Status: Active Grant

• Current Assignee: Alfredo Alvarado
• Original Assignee: Alfredo Alvarado
• Inventors: Alvarado, Alfredo
• Primary Examiner(s): Wu, Daniel
• Assistant Examiner(s): BAMERT, JOHN J
• Application Number:
  US11/901,152
• Publication Number:
  US 20090073002A1
• Time in Patent Office: 1,699 Days
• Field of Search: 341 20- 35, 345/156, 379/433.07
• US Class Current: 341/22
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• 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

An alphanumeric data input system for entering text into portable electronic devices by making linear traces or taps with a thumb or finger on a touch sensitive lineographic keypad. This keypad is conveniently located on the upper and left part of the electronic device in order to facilitate the natural motion of the thumb thus avoiding fatigue and strain of the same. The system allows the user to enter operational commands on the keypad, as well as entering of letters of different alphabets such as the Latin Alphabet, Mathematical Greek and Russian Alphabets and possibly of alphabets of other foreign languages including Japanese, Chinese and Korean. This system can be used for entering a combination of letters to speed up the writing process, and enables the entering of punctuation marks, typographical symbols and a wide range of mathematical symbols.

Claims

1. A lineographic data input system for allowing a user to enter alphanumeric characters, numbers, and symbols into an electronic device, said lineographic input system comprising:

a keypad bordered by a raised frame, said keypad consisting of 12 touch sensitive cells and a touch sensitive grid separating said cells, each of said cells and said grid adapted to generate an input signal when touched, whereby a user trace that touches a first one of said 12 touch sensitive cells and crosses over a portion of said grid to an adjacent second one of said 12 touch sensitive cells thereby generates a complete signal, said complete signal including signals corresponding to said first one of said cells, said second one of said cells, and said portion of the grid crossed;

said keypad electrically connected to means for electronically processing said input signals from said keypad and corresponding said input signals with alphanumeric characters, numbers, and symbols;

wherein each of the 26 letters of the alphabet correspond to a complete input signal formed by a single linear trace on said keypad, said linear trace touching only two adjacent cells and a portion of said grid;

whereby data input may be entered into an electronic device by making short linear traces across the cells and grid thereby generating said input signals corresponding to alphanumeric characters, numbers, and symbols.

2. A lineographic data input system according to claim 1, further including four landmarks in the form of small triangular protuberances disposed in proximity to each side of said frame.

3. A lineographic data input system according to claim 1, wherein certain of said cells are adapted with light high relief circular marks corresponding to odd numbers.

4. A lineographic data input system according to claim 1, wherein said plurality of cells are configured in four rows and three columns.

5. A lineographic data input system according to claim 4, further including a high relief line separating the first three rows from the fourth row.

6. A lineographic data input system according to claim 4, wherein the first three rows comprise an alphanumeric area, and the fourth row comprises a symbol-related area.

7. An electronic device adapted with a lineographic data input system for allowing a user to enter alphanumeric characters, numbers, and symbols into the electronic device, said electronic device comprising:

a keypad bordered by a four sided raised frame, said keypad including twelve touch sensitive cells and a touch sensitive grid separating said cells, said cells disposed in an array of four rows and three columns, each of said cells and said grid adapted to generate an input signal when touched by a user;

four small protuberances disposed in proximity to each side of said frame for providing tactile reference points to aid the user in positioning of the finger or thumb;

said grid including a raised portion separating the third and fourth rows;

means, electrically connected to said keypad, for electronically processing input signals from said keypad and corresponding said input signals with alphanumeric characters, numbers, and symbols;

wherein each of the 26 letters of the alphabet correspond to a complete input signal formed by a single linear trace on said keypad that only touches a first one of said twelve touch sensitive cells and crosses over a portion of said grid to an adjacent second one of said twelve touch sensitive cells thereby generates a complete signal, said complete signal including signals corresponding to said first one of said cells, said second one of said cells, and said portion of the grid crossed, and wherein letter combinations are formed by continuous non-linear traces on said keypad;

whereby data input may be entered into an electronic device by making short linear traces across the cells and grid thereby generating said input signals corresponding to alphanumeric characters, numbers, and symbols.