# US 2014/0192309 A1 · Display device

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- Number: US 2014/0192309 A1
- Document ID: US20140192309A1
- Status: Published application
- Kind: A1
- Application number: 14/147,690
- Filed: 2014-01-06
- Published: 2014-07-10
- Earliest claimed: 2013-01-07
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Atsuo NAKAGAWA; Eiji OOHIRA
- Web page: https://patentgrep.com/patent/US20140192309A1

## CPC

- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

The flexible printed circuit board includes a base material with a connection terminal and a signal wiring formed thereon, a first cover layer disposed on a first side of the base material, and a second cover layer disposed on a second side different from the first side. The display panel is connected to the connection terminal. The first cover layer is spaced from an end portion of the display panel by a gap of a predetermined size thereby leaving at least one of the connection terminal and the signal wiring exposed. The second cover layer overlaps with the gap in a planar view. A second end portion of the second cover layer is disposed on an opposite side the display panel. A shape of the second end portion is formed to be wavy or concavo-convex including crests and troughs.

## Claims

### Claim 1

A display device comprising a display panel and a flexible printed circuit board electrically connected to the display device, the flexible printed circuit board including a base material with a connection terminal and a signal wiring formed thereon, a first cover layer disposed on a first side of the base material, and a second cover layer disposed on a second side different from the first side of the base material,
wherein the connection terminal and the signal wiring are formed on the first side of the base material;
the display panel is connected to the connection terminal;
the first cover layer is spaced from an end portion of the display panel by a gap of a predetermined size thereby leaving at least one of the connection terminal and the signal wiring exposed;
the second cover layer overlaps with the gap in a planar view;
a first end portion of the first cover layer is disposed on a side of the gap and faces an end side of the display panel;
a shape of the first end portion is formed linearly;
a second end portion of the second cover layer is disposed on an opposite side the display panel;
a shape of the second end portion is formed to be wavy or concavo-convex including crests and troughs, and
the first end portion is positioned between the crests and the troughs in a planar view.

### Claim 2

A display device comprising a display panel and a flexible printed circuit board electrically connected to the display device, the flexible printed circuit board including a base material with a connection terminal and a signal wiring formed thereon, a first cover layer disposed on a first side of the base material, and a second cover layer disposed on a second side different from the first side of the base material,
wherein the connection terminal and the signal wiring are formed on the first side of the base material;
the display panel is connected to the connection terminal;
the first cover layer is spaced from an end portion of the display panel by a gap of a predetermined size thereby leaving at least one of the connection terminal and the signal wiring exposed;
the second cover layer overlaps with the gap in a planar view;
a second end portion of the second cover layer is disposed on an opposite side the display panel, and
a shape of the second end portion is formed to be wavy or concavo-convex including crests and troughs.

### Claim 3 (depends on 2)

The display device according to claim 2, wherein a first end portion of the first cover layer is disposed on a side of the gap and faces an end side of the display panel;
a shape of the first end portion is formed linearly.

### Claim 4 (depends on 2)

The display device according to claim 2, wherein a first end portion of the first cover layer is disposed on a side of the gap and positioned between the crests and the troughs in a planar view.

### Claim 5 (depends on 2)

The display device according to claim 2, wherein a first end portion of the first cover layer is disposed on a side of the gap and overlaps with the second cover layer in a planar view

### Claim 6 (depends on 2)

The display device according to claim 2, wherein a first end portion of the first cover layer is disposed on a side of the gap;
a shape of the first end portion is formed to be wavy or concavo-convex including crests and troughs, and
an area including the crests and troughs of the first end portion and an area including the crests and troughs of the second end portion are superposed with each other in a planar view.

### Claim 7 (depends on 6)

The display device according to claim 6, wherein the crests of the first end portion and the crests of the second end portion are shifted from each other in a planar view.

### Claim 8 (depends on 7)

The display device according to claim 7, wherein a wave form or a concavo-convex form of the first end portion has a first pitch and a wave form or a concavo-convex form of the second end portion has a second pitch, the first pitch and the second pitch being shifted from each other by a predetermined distance.

### Claim 9 (depends on 7)

The display device according to claim 7, wherein a wave form or a concavo-convex form of the first end portion has a first pitch and a wave form or a concavo-convex form of the second end portion has a second pitch, the first pitch and the second pitch being a same pitch.

### Claim 10 (depends on 9)

The display device according to claim 9, wherein the crests of the first end portion and the crests of the second end portion are shifted from each other by one fourth of the same pitch in a planar view.

### Claim 11 (depends on 3)

The display device according to claim 3, wherein the first end portion is positioned between the crests and the troughs of the second end portion in a planar view.

### Claim 12 (depends on 3)

The display device according to claim 3, wherein the first end portion overlaps with the second cover layer in a planar view.

### Claim 13 (depends on 2)

The display device according to claim 2, wherein the display panel has a first substrate, a second substrate, and a liquid crystal layer.

### Claim 14 (depends on 13)

The display device according to claim 13, further comprising a backlight unit.