# US 2013/0154928 A1 · Multilanguage Stroke Input System

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- Number: US 2013/0154928 A1
- Document ID: US20130154928A1
- Status: Published application
- Kind: A1
- Application number: 13/769,698
- Filed: 2013-02-18
- Published: 2013-06-20
- Earliest claimed: 2007-09-18
- Inventors: LIANG HSI CHANG
- Web page: https://patentgrep.com/patent/US20130154928A1

## CPC

- G06F 3/017: {Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883)}
- G06F 3/0236: {using selection techniques to select from displayed items}
- G06F 3/0237: {using prediction or retrieval techniques}
- G06F 3/04883: for inputting data by handwriting, e.g. gesture or text
- 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
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A directional stroke input system has a display. A virtual key pad is displayed on the display, and the virtual keypad has an array of virtual keys. A cursor or a focus area placed on the virtual keypad at a selected key of the virtual keypad. A stroke recognition device includes a stroke sensing area. The stroke recognition device has eight straight directional strokes including: an up left stroke, an up stroke, an up right stroke, a left stroke, a right stroke, a down left stroke, a down stroke, and a down right stroke. The stroke recognition device has eight hook strokes including: an up left hook stroke, an up hook stroke, an up right hook stroke, a left hook stroke, a right hook stroke, a down left hook stroke, a down hook stroke, and a down right hook stroke.

## Claims

### Claim 1

A directional stroke input system comprising:
a. a display; and
b. a virtual key pad displayed on the display, wherein the virtual keypad has an array of virtual keys;
c. a cursor placed on the virtual keypad;
d. a stroke recognition device having:
i. a stroke sensing area;
ii. eight straight directional strokes including: an up left stroke, an up stroke, an up right stroke, a left stroke, a right stroke, a down left stroke, a down stroke, and a down right stroke;
iii. eight hook strokes including: an up left hook stroke, an up hook stroke, an up right hook stroke, a left hook stroke, a right hook stroke, a down left hook stroke, a down hook stroke, and a down right hook stroke;
iv. two loop strokes including: a counterclockwise stroke and a clockwise stroke; wherein the loop strokes execute an enter function and an exit function; and
e. an input field for receiving text entry from the stroke recognition device.

### Claim 2 (depends on 1)

The directional stroke input system of claim 1, wherein the stroke sensing area is a separate area from the display.

### Claim 3 (depends on 1)

The directional stroke input system of claim 1, wherein the stroke sensing area overlaps onto an on screen keypad guiding display that is on the display.

### Claim 4 (depends on 1)

The directional stroke input system of claim 1, further comprising a predictive text engine analyzing inputs made on the virtual keypad, wherein the predictive text engine predicts words based on virtual key input strings entered.

### Claim 5 (depends on 1)

The directional stroke input system of claim 1, wherein the clockwise stroke executes an enter function and wherein the counterclockwise stroke executes a cancel function.

### Claim 6 (depends on 1)

The directional stroke input system of claim 1, wherein the cursor is displayed on the display.

### Claim 7 (depends on 1)

The directional stroke input system of claim 1, wherein the virtual keypad is a conventional 3×4 telephone keypad matrix having virtual keys with numerical digit names correlated to letters.

### Claim 8 (depends on 1)

The directional stroke input system of claim 1, further comprising an outer ring located on a first row, a first column and a last column of the array of virtual keys, wherein functions located on the virtual keys of the outer ring are automatically activated when the cursor moves to the outer ring, wherein the outer ring has a mode function to change language, wherein an outer ring and a conventional 3×4 telephone keypad form a 5×5 virtual keypad matrix.

### Claim 9 (depends on 8)

The directional stroke input system of claim 8, wherein the stroke sensing area is a separate area from the display.

### Claim 10 (depends on 8)

The directional stroke input system of claim 8, wherein the stroke sensing area overlaps onto an on screen keypad guiding display that is on the display.

### Claim 11 (depends on 8)

The directional stroke input system of claim 8, further comprising a predictive text engine analyzing inputs made on the virtual keypad, wherein the predictive text engine predicts words based on virtual key input strings entered.

### Claim 12 (depends on 8)

The directional stroke input system of claim 8, wherein the clockwise stroke executes an enter function and wherein the counterclockwise stroke executes a cancel function.

### Claim 13 (depends on 8)

The directional stroke input system of claim 8, wherein the cursor is displayed on the display.

### Claim 14 (depends on 8)

The directional stroke input system of claim 8, wherein the virtual keypad is a 5×5 keypad matrix that consists of an outer ring and a conventional 3×4 telephone keypad matrix having virtual keys with numerical digit names correlated to letters.