# US 2017/0255331 A1 · Touch Sensitive Processing Method, Apparatus and System for Setting Palm Rejection Area

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- Number: US 2017/0255331 A1
- Document ID: US20170255331A1
- Status: Published application
- Kind: A1
- Application number: 15/449,178
- Filed: 2017-03-03
- Published: 2017-09-07
- Earliest claimed: 2016-03-03
- Assignees: Egalax_Empia Technology Inc.
- Applicants: Egalax_Empia Technology Inc.
- Inventors: SHANG-TAI YEH
- Web page: https://patentgrep.com/patent/US20170255331A1

## CPC

- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 3/03545: {Pens or stylus}
- G06F 3/0383: {Signal control means within the pointing device}
- G06F 3/04162: {for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware}
- G06F 3/0442: {using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser}
- G06F 2203/04104: Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
- G06F 2203/04105: Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
- G06F 2203/04108: Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

The present invention provides a touch sensitive processing method for setting a palm rejection area. The method includes: setting a vertex of a palm rejection area based on a proximity or touch location of a stylus; setting a rejection area baseline vector extending from the vertex based on a stylus shaft vector of the stylus projected on a touch screen; defining an area covered by rotating the rejection area baseline vector around the vertex by a clockwise angle and an anticlockwise angle as the palm rejection area; and ignoring any proximity or touch event of an external conductive object detected in the palm rejection area.

## Claims

### Claim 1

A touch sensitive processing method for setting a palm rejection area comprising:
setting a vertex of a palm rejection area based on a proximity or touch location of a stylus;
setting a rejection area baseline vector extending from the vertex based on a stylus shaft vector of the stylus projected on a touch screen;
defining an area covered by rotating the rejection area baseline vector around the vertex by a clockwise angle and an anticlockwise angle as the palm rejection area; and
ignoring any proximity or touch event of an external conductive object detected in the palm rejection area.

### Claim 2 (depends on 1)

The touch sensitive processing method of claim 1, wherein the vertex is a point near the proximity or touch location.

### Claim 3 (depends on 1)

The touch sensitive processing method of claim 1, wherein the clockwise angle is greater than the anticlockwise angle.

### Claim 4 (depends on 1)

The touch sensitive processing method of claim 1, wherein the rejection area baseline vector extends beyond a display area of the touch screen.

### Claim 5

A touch sensitive processing apparatus for setting a palm rejection area comprising:
a sensing circuit connected with a plurality of touch sensitive electrodes of a touch screen for sensing a stylus and an external conductive object; and
a processor connected with the sensing circuit for setting a vertex of the palm rejection area based on a proximity or touch location of the stylus; setting a rejection area baseline vector extending from the vertex based on a stylus shaft vector of the stylus projected on a touch screen; defining an area covered by rotating the rejection area baseline vector around the vertex by a clockwise angle and an anticlockwise angle as the palm rejection area; and
ignoring any proximity or touch event of an external conductive object detected in the palm rejection area.

### Claim 6 (depends on 5)

The touch sensitive processing apparatus of claim 5, wherein the sensing circuit is configured for detecting the stylus shaft vector of the stylus based on electrical signals emitted by a plurality of electrodes of the stylus received by the plurality of touch sensitive electrodes.

### Claim 7 (depends on 5)

The touch sensitive processing apparatus of claim 5, wherein the vertex is a point near the proximity or touch location.

### Claim 8 (depends on 5)

The touch sensitive processing apparatus of claim 5, wherein the clockwise angle is greater than the anticlockwise angle.

### Claim 9 (depends on 5)

The touch sensitive processing apparatus of claim 5, wherein the rejection area baseline vector extends beyond a display area of the touch screen.

### Claim 10

A touch sensitive system for setting a palm rejection area comprising:
a stylus;
a touch screen including a plurality of touch sensitive electrodes; and
a touch sensitive processing apparatus including:
a sensing circuit connected with the plurality of touch sensitive electrodes for sensing a stylus and an external conductive object; and
a processor connected with the sensing circuit for setting a vertex of the palm rejection area based on a proximity or touch location of the stylus; setting a rejection area baseline vector extending from the vertex based on a stylus shaft vector of the stylus projected on the touch screen; defining an area covered by rotating the rejection area baseline vector around the vertex by a clockwise angle and an anticlockwise angle as the palm rejection area; and ignoring any proximity or touch event of an external conductive object detected in the palm rejection area.