Electronic device, display device, and method for manufacturing thereof

Patent metadata

Field	Value
Publication number	US-2020401197-A1
Application number	US-202016899784-A
Country	US
Kind code	A1
Filing date	Jun 12, 2020
Priority date	Jun 24, 2019
Publication date	Dec 24, 2020
Grant date	—

Abstract

An electronic device includes a substrate including an input terminal arranged a plurality of terminals, a wiring substrate having a flexibility connected to the input terminal part. The wiring substrate includes a base film, a cover film covering the base film, a plurality of wirings between the base film and the cover film, a connection part, and a first region bent in a first the one side and a second region adjacent to the first region. The second region of the connection part includes a first connection terminal group connected to the plurality of wirings, a second connection terminal group, and a dummy terminal group between the first connection terminal group. The first region is provided with an opening through the base film and the cover film, the second region overlaps the input terminal part, and the dummy terminal group and the opening are adjacent to each other.

First claim

What is claimed is:

1 . An electronic device, comprising:
a substrate including an input terminal arranged a plurality of terminals; a wiring substrate having a flexibility connected to the input terminal part; the wiring substrate comprises:
a base film having a first surface and a second surface opposite to the first surface;
a cover film covering the first surface of the base film;
a plurality of wirings between the base film and the cover film; and
a connection part in which the plurality of wirings is exposed from the cover film and arranged along one side of the base film,
the wiring substrate includes a first region bent in a direction crossing the one side and a second region adjacent to the first region, the second region of the connection part includes a first connection terminal group connected to the plurality of wirings, a second connection terminal group, and a dummy terminal group arranged between the first connection terminal group and the second connection terminal group and not connected to the plurality of wirings, the first region is provided with an opening through the base film and the cover film, the second region overlaps the input terminal part, and the dummy terminal group and the opening of the first region are adjacent to each other.

2 . The electronic device according to claim 1 , wherein the cross-sectional area of the first region in the direction parallel to the one side is smaller than the cross-sectional area of the second region.

3 . The electronic device according to claim 1 , wherein the opening is surrounded by the plurality of wirings and the connection part.

4 . The electronic device according to claim 1 , wherein the input terminal part includes a first terminal group connected to the first connection terminal group, a second terminal group connected to the second connection terminal group, and a dummy terminal group of the input terminal part connected to the dummy terminal group of the wiring substrate, and
the dummy terminal group of the input terminal part is not electrically connected to a plurality of wirings of the wiring substrate.

5 . The electronic device according to claim 4 , wherein the substrate is a display panel, the dummy terminal group of the input terminal part is not electrically connected to the display panel, and the first terminal group and the second terminal group are provided at both ends of the substrate,
the first connection terminal group and the second connection terminal group of the wiring substrate are provided at both ends of the wiring substrate, and the dummy terminal group of the input terminal group and the dummy terminal group of the connection part overlap with the opening when the wiring substrate is bent.

6 . The electronic device according to claim 1 , further comprising a camera module on a back surface of the substrate,
wherein the opening overlaps with the camera module when the wiring substrate is bent to the back surface of the substrate.

7 . A method for manufacturing a display device, the method comprising:
bonding a display panel and a wiring substrate, the display panel including display part arranged a plurality of pixels and a input terminal part arranged a plurality of terminals and the wiring substrate having a flexibility that a plurality of wirings arranged between a base film and a cover film, and a connection part exposed the plurality of wirings from the cover film, the bonding electrically connects the input terminal part and the connection part, and after the adhesion, removing together with the base film and the cover film that a part of the area of the wiring substrate other than the area where the plurality of wirings is provided.

8 . The method according to claim 7 , wherein removing the base film and the cover film are by laser beam processing.

9 . The method according to claim 7 , wherein removing the base film and the cover film by die processing.

10 . The method according to claim 8 , wherein removing an area surrounded by the plurality of wirings and the connection part.

11 . The method according to claim 8 , wherein removing both sides of the wiring substrate.

12 . A display device, comprising:
a display panel including a display part arranged a plurality of pixels and a terminal part arranged a plurality of terminals; a wiring substrate having flexibility that connected to the input terminal part; the wiring substrate comprises:
a base film having a first surface and a second surface opposite to the first surface;
a cover film covering the first surface of the base film;
a plurality of wirings between the base film and the cover film; and
a connection part in which the plurality of wirings is exposed from the cover film and arranged along one side of the base film,
the display panel includes a curved surface along the one side, the wiring substrate is curved in accordance with the curvature of the display panel, and the wiring substrate includes a first region and a second region, and the cross-sectional area of the first region in the direction parallel to the one side is smaller than the cross-sectional area of the second region.

13 . The display device according to claim 12 , wherein the first region includes an opening though the base film and the cover film.

14 . The display device according to claim 13 , wherein the opening is surrounded by the plurality of wirings and the connection part.

15 . The display device according to claim 14 , wherein the first region includes the base film and a notch portion in which a portion of the cover film is cut out.

16 . The display device according to claim 15 , wherein the notch portion is provided at both side of the wiring substrate, and the plurality of wirings are arranged inside the notch portion.

Assignees

• Japan Display Inc

Inventors

• Asada Keisuke
• Abe Hideaki
• Uogishi Kota
• Yamada Kazuyuki

Classifications

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• G09F9/35

  being liquid crystals (G09F9/302 takes precedence; liquid crystal materials C09K19/00; {liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13}) · CPC title

• G09F9/30 Primary

  in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) · CPC title

• H05K2201/10128

  Display · CPC title

• H05K2201/09063

  Holes or slots in insulating substrate not used for electrical connections · CPC title