INPUT DEVICE AND DISPLAY DEVICE HAVING TOUCH SENSOR FUNCTION

• US 20150268765A1
• Filed: 03/12/2015
• Published: 09/24/2015
• Est. Priority Date: 03/20/2014
• 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, AOYAMA, Toshiyuki, KASAHARA, Shigeo, KOSUGI, Naoki, INOUE, Shuji, INOUE, Manabu, TOKAI, Akira, TAKAGI, Kazushige
• Application Number:
  US14/645,755
• Publication Number:
  US 20150268765A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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 input device having a touch sensor function includes a plurality of first electrodes; a plurality of second electrodes which are disposed facing the plurality of first electrodes, each second electrode coupled capacitively with the first electrode to output a detection signal based on a touch operation, a plurality of third electrodes each disposed in a region between adjacent second electrodes, and a plurality of first connection sections which have a resistance value not lower than 1 MΩ, and electrically connect the plurality of third electrodes to a predetermined electrode set to a predetermined potential.

Claims

1. An input device having a touch sensor function, comprising:

a plurality of first electrodes;

a plurality of second electrodes which are disposed facing the plurality of first electrodes, each second electrode coupled capacitively with the first electrode to output a detection signal based on a touch operation;

a plurality of third electrodes each disposed in a region between adjacent second electrodes; and

a plurality of first connection sections which have a resistance value not lower than 1 MΩ

, and electrically connect the plurality of third electrodes to a predetermined electrode set to a predetermined potential.

2. The input device according to claim 1, wherein a resistance value of the first connection section is not higher than 1 GΩ

.

3. The input device according to claim 1, wherein the predetermined electrode is the second electrode.

4. The input device according to claim 1, wherein the predetermined electrode is an electrode which is disposed surrounding the second electrode, and provides a ground potential.

5. The input device according to claim 1, wherein

each third electrode is composed of a plurality of electrodes spaced at predetermined distance, and

second connection sections for connecting the plurality of electrodes composing the third electrode to each other are further provided.

6. The input device according to claim 1, wherein the second electrode, the third electrode and the first connection section are formed in the same layer.

7. The input device according to claim 6, wherein the second electrode, the third electrode and the first connection section are formed of conductive material.

8. The input device according to claim 1, wherein a time constant of the first connection section is not smaller than a time constant of a capacitor formed between the first electrode and the second electrode.

9. A display device comprising:

a display unit configured to update a display by applying scanning signals to a plurality of scanning signal lines in one frame period; and

an input device according to claim 1 which detects a touched position in a period synchronous with the updating of the display.