# US 2025/0155751 A1 · Liquid crystal display device

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- Number: US 2025/0155751 A1
- Document ID: US20250155751A1
- Status: Published application
- Kind: A1
- Application number: 19/021,422
- Filed: 2025-01-15
- Published: 2025-05-15
- Earliest claimed: 2015-02-13
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Masateru MORIMOTO; Saori SUGIYAMA; Motoharu MIYAMOTO
- Web page: https://patentgrep.com/patent/US20250155751A1

## CPC

- G02F 1/13394: {spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence)}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/134318: {having a patterned common electrode}
- G02F 1/134372: {for fringe field switching [FFS] where the common electrode is not patterned}
- 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 displacement between a TFT substrate and a counter substrate and the cut of an alignment film caused by a columnar spacer are prevented. A liquid crystal display device includes: a TFT substrate including a scanning line extending in a first direction, a picture signal line extending in a second direction, a pixel electrode formed in a region surrounded by the scanning line and the picture signal line, and a common electrode formed as opposed to the pixel electrode through an insulating film; a counter substrate disposed as opposed to the TFT substrate and having a spacer; and a liquid crystal sandwiched between the substrates. A common metal interconnection is formed to cover the picture signal line or the scanning line, and stacked on the common electrode. A through hole is formed on the common metal interconnection. The tip end of the spacer is disposed inside the through hole.

## Claims

### Claim 1

A display device comprising:
pixel electrodes;
a common electrode;
a capacitive insulating film between the pixel electrodes and the common electrode;
a scanning line extending in a first direction;
a signal line extending in a second direction intersecting the first direction;
a common metal interconnection covering the scanning line and the signal line;
a slit formed on the common electrode at the portion corresponding to the pixel electrodes,
an alignment film covering the common electrode;
wherein
the common electrode covers the common metal interconnection, and
the slit is present on both sides of the common electrode.

### Claim 2 (depends on 1)

The display device of claim 1, furthering comprising:
a through hole formed on the common metal interconnection in a region in which the signal line crosses the scanning line.

### Claim 3 (depends on 2)

The display device of claim 2, furthering comprising:
a spacer disposed in the through hole.

### Claim 4 (depends on 1)

The display device of claim 1,
wherein the signal line is present between the pixel electrodes.

### Claim 5 (depends on 1)

The display device of claim 1,
wherein the capacitive insulating film is formed to cover the pixel electrode.