Display device, touch detection device and electronic apparatus

• US 9,710,100 B2
• Filed: 09/10/2015
• Issued: 07/18/2017
• Est. Priority Date: 10/14/2011
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kurasawa, Hayato, Ishizaki, Koji, Azumi, Kohei
• Primary Examiner(s): HALEY, JOSEPH R
• Application Number:
  US14/850,392
• Publication Number:
  US 20150378507A1
• Time in Patent Office: 677 Days
• Field of Search: None
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/044 by capacitive means
• 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
• CPC Class Codes: G06T 5/20 using local operators
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

A display device includes: a display layer; plural first electrodes formed to be arranged above the display layer; a shield electrode formed apart from the plural first electrodes so as to surround the whole plural first electrodes along an arrangement surface; an insulating layer; and a semiconductive layer formed opposite to the first electrodes and the shield electrode so as to sandwich the insulating layer, wherein the difference between an average potential of the first electrodes and an average potential of the shield electrode is equal to or less than 0.5V.

Claims

1. A touch detection device comprising:

a transparent substrate;

plural touch detection electrodes arranged on the transparent substrate;

a shield electrode arranged on the transparent substrate, the shield electrode being apart from the plural touch detection electrodes;

an insulating layer arranged on the plural touch detection electrodes and the shield electrode; and

a semiconductive layer arranged on the insulating layer,

wherein the insulating layer is arranged between the semiconductive layer and a layer including the plural touch detection electrodes and the shield electrode, and

the difference between an average potential of the touch detection electrodes and an average potential of the shield electrode is equal to or less than 0.5V.

2. The touch detection device according to claim 1,

wherein the average potential of the shield electrode is equal to or higher than the average potential of the touch detection electrodes.

3. The touch detection device according to claim 1,

wherein gaps between the shield electrode and the touch detection electrodes are approximately the same as or larger than a gap of two touch detection electrodes adjacent to each other.

4. The touch detection device according to claim 1,

wherein the shield electrode is made of the same material as the touch detection electrodes, and

the shield electrode and the touch detection electrodes have transparency.