CAPACITIVE TOUCH SCREEN AND DISPLAY DEVICE EQUIPPED THEREWITH

• US 20150220179A1
• Filed: 02/03/2015
• Published: 08/06/2015
• Est. Priority Date: 02/06/2014
• Status: Abandoned Application

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: KIMURA, Yohei
• Application Number:
  US14/612,790
• Publication Number:
  US 20150220179A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: 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
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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

According to embodiments, a touch screen comprises, in a touch screen area: an array of first direction touch electrodes; and an array of second direction touch electrodes, each extending in a second direction; each of the touch electrodes comprising a plurality of island pads and a plurality of bridges that serially connects the island pads; each of the island pads having dents on a fringe as shaped as a rectangular wave; a width of each of the dents and a distance between the dents are 0.5 to 1.5 times of a gap between adjacent ones of the island pads; and a depth of the dents being 1 to 3.5 times of the gap between the adjacent ones of the island pads.

Claims

1. A touch screen comprising, in a touch screen area:

an array of first direction touch electrodes, each extending in a first direction; and

an array of second direction touch electrodes, each extending in a second direction, which intersect the first direction touch electrode;

each of the touch electrodes comprising a plurality of island pads and a plurality of bridges that serially connects the island pads;

each of the island pads having dents on a fringe as shaped as a rectangular wave;

a width of each of the dents and a distance between the dents are 0.5 to 1.5 times of a gap between adjacent ones of the island pads; and

a depth of the dents being 1 to 3.5 times of the gap between the adjacent ones of the island pads.

2. The touch screen according to claim 1, wherein

each of the island pads comprises a mesh pattern at least in vicinity of a fringe of the island pad;

a width of each of openings in the mesh pattern being 0.25 to 1.3 times of a gap between the adjacent island pads; and

thickness of lines in the mesh pattern being 0.5 to 1.5 times of a gap between the adjacent ones of the island pads.

3. The touch screen according to claim 2, wherein

the mesh pattern comprises non-slit mesh openings and/or slit openings.

4. The touch screen according to claim 2, wherein

the island pad comprises a central solid part and a mesh pattern surrounding the central solid part.

5. A display device having the touch screen according to claim 1.