# US 12,443,306 B2 · Display device with touch panel having X, Y and dummy electrodes

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

- Number: US 12,443,306 B2
- Document ID: US12443306B2
- Status: Granted
- Kind: B2
- Application number: 18/673,178
- Filed: 2024-05-23
- Published: 2024-09-19
- Granted: 2025-10-14
- Earliest claimed: 2008-08-06
- Assignees: Paneltouch Technologies LLC
- Applicants: Paneltouch Technologies LLC
- Inventors: Shinya Hashimoto
- Web page: https://patentgrep.com/patent/US12443306B2

## CPC

- G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads}
- G02F 1/133345: {Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence)}
- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making}
- G06F 1/16: Constructional details or arrangements
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/0416: {Control or interface arrangements specially adapted for digitisers}
- G06F 3/0418: {for error correction or compensation, e.g. based on parallax, calibration or alignment}
- G06F 3/044: by capacitive means
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- H05K 1/0216: {Reduction of cross-talk, noise or electromagnetic interference (grounding H05K1/0215)}
- H05K 1/11: Printed elements for providing electric connections to or between printed circuits
- H05K 1/118: {specially for flexible printed circuits, e.g. using folded portions}
- 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 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
- 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
- H05K 3/361: {Assembling flexible printed circuits with other printed circuits}
- H05K 2201/09245: Crossing layout
- H05K 2201/09254: Branched layout
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A display device includes a display panel, and an electrostatic capacitive type touch panel which is formed in an overlapping manner with the display panel. A plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes. A first signal line supplies signals to the X electrodes, a second signal line supplies signals to the Y electrodes, and the first signal line and the second signal line are formed on a flexible printed circuit board. A dummy electrode is formed adjacent to an electrode portion of each X electrode and electrode portion of each Y electrode, the dummy electrode does not overlap the X electrode and the Y electrode, and the dummy electrode does not electrically connect with the first and second signal lines.

## Claims

### Claim 1

A display device comprising:
an organic light emitting diode display panel,
an electrostatic capacitive type touch panel comprising:
a substrate including a pair of long sides and a pair of short sides;
a plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes formed on the substrate;
a plurality of first signal lines, each having a first portion which extends along at least one of the short and long sides of the electrostatic capacitive type touch panel, wherein the plurality of first signal lines are connected to the plurality of X electrodes respectively;
a plurality of second signal lines, each having a first portion which extends along at least one of the short and long sides of the electrostatic capacitive type touch panel, wherein the plurality of second signal lines are connected to the plurality of Y electrodes respectively;
a plurality of floating electrodes formed adjacent to at least one of the plurality of X electrodes and Y electrodes, wherein the floating electrodes do not overlap either the plurality of X electrodes or the plurality of Y electrodes, and wherein the floating electrodes do not electrically connect with either the first or second signal lines;
a flexible printed circuit board comprising:
a second portion of each of the first and the second signal lines,
a plurality of first connection terminals, each connected to the second portion of at least one of the first signal lines,
a plurality of second connection terminals, each connected to the second portion of at least one of the second signal lines,
a power source line connected to a ground potential,
wherein the second portion of the first signal lines and second portion of the second signal lines do not intersect the power source line.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the number of the plurality of second connection terminals is less than that of the plurality of first connection terminals.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein the plurality of X electrodes, the plurality of Y electrodes, the plurality of the first signal lines, and the plurality of the second signal lines are made from metal materials.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein the flexible printed circuit board has a first conductive layer and a second conductive layer.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein the second portion of each of the second signal lines is made of the second conductive layer and is electrically connected to the first conductive layer.