# US 10,310,693 B2 · Controller for position detection

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- Number: US 10,310,693 B2
- Document ID: US10310693B2
- Status: Granted
- Kind: B2
- Application number: 15/958,132
- Filed: 2018-04-20
- Published: 2018-08-23
- Granted: 2019-06-04
- Earliest claimed: 2009-10-09
- Assignees: Egalax_Empia Technology Inc.
- Applicants: Egalax_Empia Technology Inc.
- Inventors: Chin-Fu Chang; Cheng-Han Lee; Chi-Hao Tang; Shun-Lung Ho
- Web page: https://patentgrep.com/patent/US10310693B2

## CPC

- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G01R 27/2605: {Measuring capacitance (capacitive sensors G01D5/24)}
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)}
- G06F 3/04182: {Filtering of noise external to the device and not generated by digitiser components}
- G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally}
- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- G06F 3/03545: {Pens or stylus}
- G06F 3/047: using sets of wires, e.g. crossed wires
- G06F 2203/04101: 2.5D-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 and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
- G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- 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 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

A controller for position detection is disclosed. At least one first 1-D position corresponding to at least one external object is determined based on signals of a plurality of first sensors by self-capacitance detection. Then, at least one second 1-D position corresponding to the at least one first 1-D position is determined based on signals of a plurality of second sensors by mutual-capacitance detection, wherein each second 1-D position is determined based on a differential sensing information whose each value is based on signals of two second sensors by mutual-capacitance detection.

## Claims

### Claim 1

A controller for position detection, performing at least the following operations:
determining at least one first 1-D position corresponding to at least one external object based on signals of a plurality of first sensors by self-capacitance detection; and
determining at least one second 1-D position corresponding to the at least one first 1-D position based on signals of a plurality of second sensors by mutual-capacitance detection, wherein each second 1-D position is determined based on a differential sensing information including a plurality of mutual capacitive values at the same time, wherein each of plurality of mutual capacitive values is a difference between signals of two second sensors by mutual-capacitance detection.

### Claim 2 (depends on 1)

The controller of claim 1, further performing the following operations:
providing at least a 2-D position based on the at least one second 1-D position corresponding to the at least one first 1-D position.

### Claim 3 (depends on 1)

The controller of claim 1, further performing the following operations:
determining at least one third 1-D position corresponding to the at least one second 1-D position based on signals of these first sensors by mutual-capacitance detection; and
providing at least a 2-D position based on the at least one third 1-D position corresponding to the at least one second 1-D position.

### Claim 4 (depends on 1)

The controller of claim 1, further performing the following operations:
determining at least one touch-related first sensor based on the at least one first 1-D position; and
determining at least one touch-related second sensor based on the at least one second 1-D position.

### Claim 5 (depends on 4)

The controller of claim 4, further performing the following operations:
when the number of the at least one touch-related second sensor is greater than the number of the at least one touch-related first sensor, providing at least one 2-D position based on the at least one second 1-D position corresponding to the at least one first 1-D position.

### Claim 6 (depends on 4)

The controller of claim 4, wherein when the number of the at least one touch-related second sensor is not greater than the number of the at least one touch-related first sensor, the controller further performs the following operations:
determining at least one third 1-D position corresponding to the at least one second 1-D position based on signals of these first sensors by mutual-capacitance detection; and
providing at least a 2-D position based on the at least one third 1-D position corresponding to the at least one second 1-D position.

### Claim 7 (depends on 1)

The controller of claim 1, wherein the self-capacitance detection includes providing a driving signal to these first sensors and detecting signals of these first sensors.

### Claim 8 (depends on 1)

The controller of claim 1, wherein the mutual-capacitance detection includes:
when one of these first sensors is provided with a driving signal, detecting signals of these second sensors; or
when one of these second sensors is provided with a driving signal, detecting signals of these first sensors.

### Claim 9 (depends on 8)

The controller of claim 8, wherein the mutual-capacitance detection further includes:
selecting at least one first sensor provided with the driving signal based on the at least one first 1-D position; and
selecting at least one second sensor provided with the driving signal based on the at least one second 1-D position.

### Claim 10 (depends on 1)

The controller of claim 1, wherein the self-capacitance detection includes:
determining at least one fourth 1-D position and at least one fifth 1-D position corresponding to the at least one external object based on variations in signals of these first sensors,
wherein the at least one fourth 1-D position and the at least one fifth 1-D position that is greater in number is used as the at least one first 1-D position, and
when the number of the at least one fourth 1-D position and the number of the at least one fifth 1-D position are the same, one of the at least one fourth 1-D position and the at least one fifth 1-D position is used as the at least one first 1-D position.

### Claim 11 (depends on 1)

The controller of claim 1, wherein the two first sensors are adjacent or non-adjacent.

### Claim 12 (depends on 1)

The controller of claim 1, wherein a device for position detection includes the first sensors and the second sensors intersecting each other at a plurality of intersecting points.