Touch device

• US 10,162,460 B2
• Filed: 05/11/2017
• Issued: 12/25/2018
• Est. Priority Date: 11/04/2016
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Huang, Wei-Shun, Yuan, Ching-Chien, Chen, Tzu-Jung, Yang, Chia-Feng, Chen, Che-Hsien
• Primary Examiner(s): Dharia, Prabodh M
• Application Number:
  US15/592,354
• Publication Number:
  US 20180129339A1
• Time in Patent Office: 593 Days
• Field of Search: 345156-184, 1 1, 349 12
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: 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
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch device includes a substrate, a touch electrode layer, a first wire, and at least one second wire The substrate includes a touch region and a peripheral region. The peripheral region is surrounding the touch region. The touch electrode layer is disposed at the touch region. The first wire is disposed at the peripheral region and is configured to receive a touch driving signal. The at least one second wire is disposed at the peripheral region and is configured to receive a synchronization signal corresponding to the touch driving signal. The first wire is disposed between the touch region and the at least one second wire.

Claims

1. A touch device, comprising:

a substrate, comprising a touch region and a peripheral region surrounding the touch region;

a touch electrode layer, disposed at the touch region;

a first wire, disposed at the peripheral region, for receiving a touch driving signal; and

a second wire, disposed at the peripheral region, for receiving a synchronization signal corresponding to the touch driving signal, wherein the first wire is disposed between the touch region and the second wire;

wherein both the touch driving signal and the synchronization signal have a first reliability assessment value, wherein the first reliability assessment value is related to a signal voltage amplitude, duration of a signal enabling period per frame, and a signal enabling frequency.

2. The touch device according to claim 1, wherein the synchronization signal and the touch driving signal are synchronized in timing.

3. The touch device according to claim 1, wherein the synchronization signal and the touch driving signal have a synchronized voltage waveform.

4. The touch device according to claim 1, further comprises a plurality of second wires for receiving a plurality of synchronization signals corresponding to the touch driving signal, wherein the plurality of the synchronization signals are synchronized in timing.

5. The touch device according to claim 1, further comprising:

a switch unit, for switching the second wire between connecting to a control unit and connecting to a ground terminal.

6. The touch device according to claim 5, wherein the switch unit comprises:

a first switch, for controlling the second wire to connect to the control unit, wherein the synchronization signal from the control unit is transmitted to the second wire via the first switch.

7. The touch device according to claim 5, wherein the switch unit comprises:

a second switch, for controlling the second wire to connect to the ground terminal, so that an electrostatic current on the second wire flows to the ground terminal by means of the second switch.

8. The touch device according to claim 1, wherein the second wire connects to the first wire.

9. The touch device according to claim 1, wherein the second wire and the first wire are connected at the peripheral region.

10. The touch device according to claim 1, further comprising:

a circuit board; and

a control unit, disposed on the circuit board, wherein the first wire is connected to the control unit, and the second wire and the first wire are connected at the circuit board.

11. The touch device according to claim 1, wherein the second wire is floating.