INPUT DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE

• US 20150160763A1
• Filed: 02/20/2015
• Published: 06/11/2015
• Est. Priority Date: 09/24/2012
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: NAKAYAMA, Takahito, KADO, Hiroyuki, KASAHARA, Shigeo, KOSUGI, Naoki, INOUE, Manabu, TOKAI, Akira, TAKAGI, Kazushige
• Application Number:
  US14/627,908
• Publication Number:
  US 20150160763A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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

An object of the present technology is to provide an input device that is a capacitance coupling type input device capable of easily being incorporated into a display device. The input device includes: a plurality of driving electrodes 11 and a plurality of detection electrodes 12 arranged so as to cross each other; and capacitive elements formed between the driving electrodes and the detection electrodes. The driving electrodes 11 and the detection electrodes 12 are each configured by electrically connecting a plurality of island-like electrode blocks using connection portions, and the electrode blocks of the driving electrodes and the electrode blocks of the detection electrodes are arranged so as not to be opposed to each other. The island-like electrode blocks arrayed in a row direction are connected electrically with each other using the connection portions having an area smaller than the area of the electrode blocks arrayed in the row direction. The island-like electrode blocks arrayed in a column direction are connected electrically with each other using the connection portions having an area smaller than the area of the electrode blocks arrayed in the column direction.

Claims

1. An input device, comprising:

a plurality of driving electrodes and a plurality of detection electrodes arranged so as to cross each other via an interlayer insulating film; and

capacitive elements formed between the driving electrodes and the detection electrodes,

wherein the driving electrodes and the detection electrodes are each configured by electrically connecting a plurality of island-like electrode blocks using connection portions, and the island-like electrode blocks of the driving electrodes and the island-like electrode blocks of the detection electrodes are arranged so as not to be opposed to each other, and

the island-like electrode blocks arrayed in a row direction are connected to each other using the connection portions that are formed continuously with the electrode blocks arrayed in the row direction in the same layer and that have an area smaller than the area of the electrode blocks arrayed in the row direction, and the island-like electrode blocks arrayed in a column direction are connected to each other using the connection portions that are formed continuously with the electrode blocks arrayed in the column direction in the same layer and that have an area smaller than the area of the electrode blocks arrayed in the column direction.

2. A liquid crystal display device, comprising:

a liquid crystal panel having a plurality of pixel electrodes and a common electrode provided so as to be opposed to the pixel electrodes and updating a display by sequentially applying a scanning signal to switching elements that control application of a voltage to the pixel electrodes; and

an input device having a plurality of driving electrodes and a plurality of detection electrodes arranged in the liquid crystal panel so as to cross each other via an interlayer insulating film, and capacitive elements formed between the driving electrodes and the detection electrodes,

wherein, in the input device, either the driving electrodes or the detection electrodes are formed by dividing the common electrode,

the driving electrodes and the detection electrodes are each configured by electrically connecting a plurality of island-like electrode blocks using connection portions, and the island-like electrode blocks of the driving electrodes and the island-like electrode blocks of the detection electrodes are arranged so as not to be opposed to each other, and

the island-like electrode blocks arrayed in a row direction are connected to each other using the connection portions that are formed continuously with the electrode blocks arrayed in the row direction in the same layer and that have an area smaller than the area of the electrode blocks arrayed in the row direction, and the island-like electrode blocks arrayed in a column direction are connected to each other using the connection portions that are formed continuously with the electrode blocks arrayed in the column direction in the same layer and that have an area smaller than the area of the electrode blocks arrayed in the column direction.

3. The liquid crystal display device according to claim 2, wherein the driving electrodes of the input device are formed by dividing the common electrode.