INPUT DEVICE AND DISPLAY DEVICE PROVIDED WITH SAME

• US 20120182250A1
• Filed: 12/25/2010
• Published: 07/19/2012
• Est. Priority Date: 12/28/2009
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Nagata, Yasunari, Minami, Takashi, Miyazaki, Yoshio
• Granted Patent: US 9,182,857 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

An input device is provided with a substrate having a main surface, a first detecting electrode pattern provided on or above the main surface of the substrate, and a second detecting electrode pattern provided on or above the main surface of the substrate wherein a portion of the second detecting electrode pattern intersects the first detecting electrode pattern through an insulator; wherein the insulator, in cross-section taken along the second detecting electrode pattern, comprises a curved convex surface in a region from an end portion to an apex of the insulator.

Claims

1. An input device comprising:

a substrate having a main surface;

a first detection electrode pattern provided on or above the main surface of the substrate; and

a second detection electrode pattern provided on or above the main surface of the substrate, a portion of the second detection electrode pattern intersecting the first detection electrode pattern via an insulator, wherein

the insulator has a convex curved surface on a cross section along the second detection electrode pattern and in a region from an end portion to an apex of the insulator.

2. The input device according to claim 1, wherein a tilt angle of the insulator with respect to the main surface of the substrate has at least one local minimal value and one local maximal value between the end portion and the apex of the insulator on the cross section along the second detection electrode pattern.

3. The input device according to claim 1, wherein an upper surface of the insulator on a cross section perpendicular to the cross section along the second detection electrode pattern is more flat than the upper surface of the insulator on the cross section along the second detection electrode pattern.

4. The input device according to claim 1, the insulator is formed in a rectangular shape elongated in a direction along the second detection electrode pattern as viewed from above.

5. The input device according to claim 1, wherein, on the cross section along the second detection electrode pattern, a thickness of the second detection electrode pattern at the end portion of the insulator is larger than a thickness of the second detection electrode pattern at the apex of the insulator.

6. The input device according to claim 1, wherein a width of the second detection electrode pattern at the end portion of the insulator is larger than a width of the second detection electrode pattern at the apex of the insulator, as viewed from above.

7. The input device according to claim 1, wherein a surface roughness of the end portion of the insulator is larger than a surface roughness of the apex of the insulator.

8. The input device according to claim 1, wherein the substrate is warped so as to project toward opposite to a side on which the first detection electrode pattern and the second detection electrode pattern are provided.

9. A display device comprising:

the input device according to claim 1; and

a display panel arranged to face the input device.

10. The display device according to claim 9, wherein the display panel is a liquid crystal display panel.