# US 2021/0081069 A1 · Touch and stylus sensing

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0081069 A1
- Document ID: US20210081069A1
- Status: Published application
- Kind: A1
- Application number: 17/102,812
- Filed: 2020-11-24
- Published: 2021-03-18
- Earliest claimed: 2017-12-15
- Assignees: Azoteq (Pty) Ltd
- Applicants: Azoteq (Pty) Ltd
- Inventors: Frederick Johannes BRUWER; Tobias Gerhardus BRAND; Jacobus Daniel VAN WYK
- Web page: https://patentgrep.com/patent/US20210081069A1

## CPC

- G06F 3/0416: {Control or interface arrangements specially adapted for digitisers}
- G06F 3/03545: {Pens or stylus}
- G06F 3/03547: {Touch pads, in which fingers can move on a surface}
- G06F 3/038: Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
- G06F 3/044: by capacitive means
- G06F 3/046: by electromagnetic means
- G06F 3/04883: for inputting data by handwriting, e.g. gesture or text
- G06F 3/1423: {controlling a plurality of local displays, e.g. CRT and flat panel display}
- G06F 3/1462: {with means for detecting differences between the image stored in the host and the images displayed on the remote displays}
- 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 2203/04106: Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
- 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
- G09G 2354/00: Aspects of interface with display user
- G09G 2370/06: Consumer Electronics Control, i.e. control of another device by a display or vice versa
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A dual user interface trackpad that utilize capacitive sensing to detect user proximity and/or touch and inductive sensing to detect stylus input, allowing a user to select specific content or a window on an associated display with touch, to reposition and manipulate the selected content or window with touch to facilitate more convenient entry of additional content amongst the selected content or window using the stylus, and to indicate completion of the entry of content with another touch and/or proximity event on or near the trackpad.

## Claims

### Claim 1

A method for engaging a trackpad with user proximity and/or touch and with a stylus, said trackpad comprising capacitive sensing and inductive sensing circuitry, wherein the capacitive sensing circuitry is used to detect user proximity and/or touch events on said trackpad and the inductive sensing circuitry is used to detect stylus position and movement on said trackpad, wherein said method comprises the steps of detecting a user proximity and/or touch event on said trackpad for selection of a window displayed on an associated display, of monitoring the stylus position and movement for entry of content in said window, and the step or steps of detecting a user proximity and/or touch event to reposition and/or set the position of said window.

### Claim 2 (depends on 1)

The method of claim 1, wherein said step of monitoring the stylus position and movement for entry of content is preceded by a step of detecting a user proximity and/or touch gesture to resize said window

### Claim 3 (depends on 1)

The method of claim 1, wherein said step of monitoring the stylus position and movement for entry of content is followed by the step of detecting a user proximity and/or touch gesture to resize said window

### Claim 4 (depends on 1)

The method of claim 1, wherein said trackpad also functions as a secondary display, and wherein the trackpad displays the selected window.

### Claim 5 (depends on 1)

The method of claim 1, wherein the repositioning of the selected window is used to place it at a position more convenient for said entering of content with the stylus.

### Claim 6 (depends on 1)

The method of claim 1, wherein the step of monitoring said stylus position and movement is subject to the simultaneous and continued detection of a user proximity and/or touch event during said entry.

### Claim 7 (depends on 6)

The method of claim 6, wherein said detected user proximity and/or touch event during said entry comprises a finger touch on the trackpad.

### Claim 8 (depends on 1)

The method of claim 1, wherein said capacitive sensing circuitry and said inductive sensing circuitry utilize charge transfer circuitry and methods.

### Claim 9 (depends on 1)

The method of claim 1, wherein the stylus comprises a spring loaded tip and wherein the step of monitoring the stylus position and movement for entry of content includes detection of the stylus being pressed with sufficient force against said trackpad to cause the stylus tip to move sufficiently into a body of the stylus to result in a connection of two ends of a coil within said stylus, with a change in measured inductance due to said connection detected with the inductive sensing circuitry.

### Claim 10

A trackpad comprising capacitive sensing circuitry as well as inductive sensing circuitry, said trackpad associated with a display, wherein the capacitive sensing circuitry detects user proximity and/or touch events on the trackpad, wherein the inductive sensing circuitry detects position and movement of a stylus on the trackpad, wherein the trackpad detects a user proximity and/or touch event used for selecting a window on said display, wherein the trackpad detects another user proximity and/or touch event or events used for repositioning and/or setting of the selected window, and wherein the trackpad detects stylus position and movement used to enter content in said window.

### Claim 11 (depends on 10)

The trackpad of claim 10, wherein the trackpad detects a user proximity and/or touch gesture which precedes said entry of content into said window, said gesture used to resize the window.

### Claim 12 (depends on 10)

The trackpad of claim 10, wherein trackpad detects a user proximity and/or touch gesture which follows said entry of content into said window, said gesture used to resize the window.

### Claim 13 (depends on 10)

The trackpad of claim 10, wherein said trackpad also functions as a secondary display, and wherein the trackpad displays the selected window.

### Claim 14 (depends on 10)

The trackpad of claim 10, wherein the repositioning of the selected window is used to place it at a position more convenient for said entering of content with the stylus.

### Claim 15 (depends on 10)

The trackpad of claim 10, wherein the detection of content entry with said stylus is subject to the simultaneous detection of another user proximity and/or touch event by the trackpad, with said another event detected for the duration of content entry.

### Claim 16 (depends on 15)

The trackpad of claim 15, wherein said detected another user proximity and/or touch event comprises a finger touch on the trackpad.

### Claim 17 (depends on 10)

The trackpad of claim 10, wherein said capacitive sensing circuitry and said inductive sensing circuitry utilize charge transfer circuitry and methods.

### Claim 18 (depends on 10)

The trackpad of claim 10, wherein the stylus comprises a spring loaded tip and wherein the user presses the stylus with sufficient force against said trackpad during entry of content to cause said tip to move sufficiently into a body of the stylus to result in a connection of two ends of a coil within said stylus, and wherein said inductance sensing circuitry measures a change in inductance due to said connection.