Touch sensing panel

• US 9,395,854 B2
• Filed: 10/17/2013
• Issued: 07/19/2016
• Est. Priority Date: 10/30/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Han, Jonghyun, Seo, JungSeok, Kang, Byungkoo
• Primary Examiner(s): Lee, Nicholas
• Assistant Examiner(s): Taylor, Jr., Duane N
• Application Number:
  US14/056,525
• Publication Number:
  US 20140118298A1
• Time in Patent Office: 1,006 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
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

Provided is a touch sensing panel including a substrate that includes a touch electrode formation area and an active area formed within the touch electrode formation area; a plurality of first conductive electrode serials that are arranged on the touch electrode formation area of the substrate in such a manner that the first conductive electrode serials are separated from one another along a first direction; a plurality of second conductive electrode serials that are arranged on the touch electrode formation area of the substrate in such a manner that the second conductive electrode serials are separated from one another along a second direction intersecting the first direction and that are electrically insulated from the first conductive electrode serials; and a plurality of sensing nodes that are positioned at crossings of the first conductive electrode serials and the second conductive electrode serials.

Claims

1. A touch sensing panel comprising:

a substrate that includes a touch electrode formation area and an active area formed within the touch electrode formation area;

a plurality of first conductive electrode serials that are arranged on the touch electrode formation area of the substrate in such a manner that the first conductive electrode serials are separated from one another along a first direction;

a plurality of second conductive electrode serials that are arranged on the touch electrode formation area of the substrate in such a manner that the second conductive electrode serials are separated from one another along a second direction intersecting the first direction and that are electrically insulated from the plurality of first conductive electrode serials; and

a plurality of sensing nodes that are positioned at crossings of the plurality of first conductive electrode serials and the plurality of second conductive electrode serials,

wherein the active area is formed within an area defined by a first imaginary line, a second imaginary line, a third imaginary line, and a fourth imaginary line, such that the uppermost sensing nodes, the lowermost sensing nodes, the leftmost sensing nodes and the rightmost sensing nodes are located outside of the active area defined by the first, second, third and fourth imaginary lines,

wherein the active area corresponds to a display area and the active area is smaller than the touch electrode formation area,

wherein an outer portion of the touch electrode formation area located outside the area defined by the first, second, third and fourth imaginary lines does not correspond to the display area,

wherein a touch input received anywhere within the area defined by the first, second, third and fourth imaginary lines is sensed by at least four adjacent sensing nodes surrounding the touch input, and

wherein the touch sensing panel is configured to calculate a touch position of the touch input with at least two adjacent sensing nodes within the touch electrode formation area and outside the active area, in response to the input being applied to an edge of the active area.

2. The touch sensing panel according to claim 1, wherein the leftmost sensing nodes and the rightmost sensing nodes are located outside of the active area and within the touch electrode formation area.

3. The touch sensing panel according to claim 1, wherein the uppermost sensing nodes and the lowermost nodes are located outside of the active area and within the touch electrode formation area.

4. The touch sensing panel according to claim 3, wherein each of the plurality of first conductive electrode serials are formed of a plurality of electrode patterns, and

wherein leftmost electrode patterns of the plurality of first conductive electrode serials are larger in size than inner electrode patterns formed within the active area.

5. The touch sensing panel according to claim 4, wherein rightmost electrode patterns of the plurality of first conductive electrode serials are larger in size than the inner electrode patterns formed within the active area.