Electrostatic capacitive touch screen panel

• US 9,423,918 B2
• Filed: 11/20/2014
• Issued: 08/23/2016
• Est. Priority Date: 12/30/2013
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kang, Sungjin, Han, Jonghyun, Lee, Jaegyun
• Primary Examiner(s): Lubit, Ryan A
• Application Number:
  US14/548,525
• Publication Number:
  US 20150185916A1
• Time in Patent Office: 642 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

An electrostatic capacitive touch screen panel includes a plurality of first touch electrodes divided in a first direction and a second direction crossing the first direction; a plurality of second touch electrodes disposed between first touch electrodes neighboring in the first direction and extending in the second direction; and a plurality of grounding/floating electrodes disposed between the first touch electrodes and second touch electrodes arranged in the second direction and extending in the second direction.

Claims

1. An electrostatic capacitive touch screen panel, comprising:

a plurality of first touch electrodes divided in a first direction and a second direction crossing the first direction;

a plurality of second touch electrodes disposed between first touch electrodes neighboring in the first direction and extending in the second direction; and

a plurality of grounding/floating electrodes disposed between the first touch electrodes and second touch electrodes arranged in the second direction and extending in the second direction,

wherein a first subset of the plurality of the grounding/floating electrodes are floated in a first half of one touch driving period and grounded in a second half of the one touch driving period, and a second subset of the plurality of grounding/floating electrodes are grounded in the first half of one touch driving period and floated in the second half of the one touch driving period during user input.

2. The electrostatic capacitive touch screen panel of claim 1, wherein the first touch electrodes comprise 1-1 touch electrodes and 1-2 touch electrodes arranged in the second direction along the first direction,

the 1-1 touch electrodes and the 1-2 touch electrodes are connected in the first direction, and

when odd-numbered grounding/floating electrodes are allowed to float and even-numbered grounding/floating electrodes are grounded during the first half of one touch driving period, the odd-numbered grounding/floating electrodes are grounded and the even-numbered grounding/floating electrodes are allowed to float during the second half of the touch driving period.

3. The electrostatic capacitive touch screen panel of claim 1, wherein the first touch electrodes comprise 1-1 touch electrodes and 1-2 touch electrodes arranged in the second direction along the first direction, and

the electrostatic capacitive touch screen panel further comprises 1-1 main routing wires respectively connected to the 1-1 touch electrodes, and 1-2 main routing wires respectively connected to the 1-2 touch electrodes.

4. The electrostatic capacitive touch screen panel of claim 3, wherein the second touch electrodes comprise 2-1 touch electrodes and 2-2 touch electrodes extending in the second direction along the first direction, and

the electrostatic capacitive touch screen panel further comprise 2-1 main routing wires respectively connected to the 2-1 touch electrodes, and 2-2 main routing wires respectively connected to the 2-2 touch electrodes.

5. The electrostatic capacitive touch screen panel of claim 4, wherein the grounding/floating electrodes comprise first to fourth grounding/floating electrodes extending in the second direction along the first direction, and

the electrostatic capacitive touch screen panel further comprises first to fourth main grounding/floating wires respectively connected to the first to fourth grounding/floating electrodes.

6. The electrostatic capacitive touch screen panel of claim 5, further comprising a flexible printed circuit including:

1-1 and 1-2 sub routing wires respectively connected to the 1-1 and 1-2 main routing wires;

first connecting wires interconnecting the 1-1 sub routing wires and the 1-2 sub routing wires;

first signal wires respectively connected to the first connecting wires;

2-1 and 2-2 signal wires respectively connected to the 2-1 and 2-2 main routing wires;

first to fourth sub grounding/floating wires respectively connected to the first to fourth main grounding/floating wires;

a 2-1 connecting wire connected to odd-numbered ones of the first to fourth sub grounding/floating wires;

a 2-2 connecting wire connected to even-numbered ones of the first to fourth sub grounding/floating wires; and

a second grounding/floating signal wire connected to the 2-2 connecting wire.

7. The electrostatic capacitive touch screen panel of claim 6, wherein when the first grounding/floating signal wire is grounded during the first half of one touch driving period, the second grounding/floating signal wire is allowed to float during the second half of the touch driving period.

8. The electrostatic capacitive touch screen panel of claim 1, wherein the first touch electrodes comprise 1-1 touch electrodes and 1-2 touch electrodes arranged in the second direction along the first direction,

the 1-1 touch electrodes and the 1-2 touch electrodes are connected in the first direction, and

when the even-numbered grounding/floating electrodes are allowed to float and the odd-numbered grounding/floating electrodes are grounded during the first half of one touch driving period, the even-numbered grounding/floating electrodes are grounded and the odd-numbered grounding/floating electrodes are allowed to float during the second half of the touch driving period.

9. The electrostatic capacitive touch screen panel of claim 6, wherein when the first grounding/floating signal wire is allowed to float during the first half of one touch driving period, the second grounding/floating signal wire is grounded during the second half of the touch driving period.