# US 10,871,698 B2 · Display device

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- Number: US 10,871,698 B2
- Document ID: US10871698B2
- Status: Granted
- Kind: B2
- Application number: 16/361,536
- Filed: 2019-03-22
- Published: 2019-10-03
- Granted: 2020-12-22
- Earliest claimed: 2018-03-28
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Takahiro Takeuchi; Yoshitaka Ozeki; Koji Ishizaki; Tomoyasu Hirano; Koshiro Moriguchi
- Web page: https://patentgrep.com/patent/US10871698B2

## CPC

- G02F 1/167: by electrophoresis
- G02F 1/1343: Electrodes {(reflective electrodes G02F1/133553)}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/16762: having three or more electrodes per pixel
- G02F 1/16766: for active matrices
- G02F 1/16757: Microcapsules
- 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

According to one embodiment, a display device includes a capacitance electrode, a first pixel electrode overlapping the capacitance electrode, a second pixel electrode overlapping the capacitance electrode, a shield layer disposed between the first pixel electrode and the second pixel electrode, a common electrode, and an electrophoretic element disposed between the common electrode and the first pixel electrode and between the common electrode and the shield layer. The first pixel electrode and the second pixel electrode are arranged along a first direction, and the shield layer extends in a second direction which crosses the first direction between the first pixel electrode and the second pixel electrode.

## Claims

### Claim 1

A display device comprising:
a switching element;
an organic insulating film disposed on the switching element;
a capacitance electrode disposed on the organic insulating film;
an inorganic insulating film covering the capacitance electrode;
a first pixel electrode disposed on the inorganic insulating film and overlapping the capacitance electrode;
a second pixel electrode disposed on the inorganic insulating film, overlapping the capacitance electrode and adjacent to the first pixel electrode;
a shield layer disposed on the inorganic insulating film, being in contact with the inorganic insulating film, located between the first pixel electrode and the second pixel electrode and being apart from the first pixel electrode and the second pixel electrode;
a common electrode; and
an electrophoretic element disposed between the common electrode and the first pixel electrode and between the common electrode and the shield layer, wherein
the first pixel electrode is electrically connected to the switching element in an opening of the capacitance electrode, a first hole of the organic insulating film, and a second hole of the inorganic insulating film,
a stacked body of the capacitance electrode, the inorganic insulating film, and the shield layer overlaps the electrophoretic element,
the first pixel electrode and the second pixel electrode are arranged along a first direction, and
the shield layer extends in a second direction which crosses the first direction between the first pixel electrode and the second pixel electrode.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the first pixel electrode, the second pixel electrode, and the shield layer are disposed in the same layer, and
a first gap between the shield layer and the first pixel electrode and a second gap between the shield layer and the second pixel electrode are less than a third gap between the shield layer and the electrophoretic element.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the first gap and the second gap are ⅓ or less than the third gap.

### Claim 4 (depends on 3)

The display device of claim 3, wherein the first gap and the second gap are 5 μm or less.

### Claim 5 (depends on 1)

The display device of claim 1, wherein the shield layer is formed as a lattice surrounding the first pixel electrode in a plan view.

### Claim 6 (depends on 5)

The display device of claim 5, further comprising a metal line overlapping each of the first pixel electrode and the second pixel electrode, wherein
the shield layer crosses the metal line.

### Claim 7 (depends on 6)

The display device of claim 6, wherein the first pixel electrode, the second pixel electrode, and the shield layer are formed of a transparent conductive material.

### Claim 8 (depends on 7)

The display device of claim 7, wherein the shield layer is electrically floating.

### Claim 9

A display device comprising:
a scan line extending in a first direction;
a signal line extending in a second direction crossing the first direction;
a switching element electrically connected to the scan line and the signal line;
an organic insulating film disposed on the switching element;
a capacitance electrode disposed on the organic insulating film and overlapping the scan line and the signal line;
an inorganic insulating film covering the capacitance electrode;
a pixel electrode disposed on the inorganic insulating film and overlapping the capacitance electrode; and
a shield layer disposed on the inorganic insulating film, being in contact with the inorganic insulating film, and formed as a lattice surrounding the pixel electrode in a plan view, wherein
the pixel electrode is electrically connected to the switching element in an opening of the capacitance electrode, a first hole of the organic insulating film, and a second hole of the inorganic insulating film,
a stacked body of the capacitance electrode, the inorganic insulating film, and the shield layer overlaps the electrophoretic element,
the shield layer is apart from the pixel electrode, and
the shield layer crosses the scan line and the signal line in a plan view.

### Claim 10 (depends on 9)

The display device of claim 9, wherein the shield layer is electrically floating.

### Claim 11 (depends on 10)

The display device of claim 10, wherein the pixel electrode and the shield layer are disposed in the same layer.

### Claim 12 (depends on 11)

The display device of claim 11, wherein the pixel electrode and the shield layer are formed of a transparent conductive material.

### Claim 13

A display device comprising:
a switching element;
an organic insulating film disposed on the switching element;
a capacitance electrode disposed on the organic insulating film;
an inorganic insulating film covering the capacitance electrode;
a first pixel electrode disposed on the inorganic insulating film and overlapping the capacitance electrode;
a second pixel electrode disposed on the inorganic insulating film and overlapping the capacitance electrode and adjacent to the first pixel electrode;
a shield layer disposed on the inorganic insulating film and being in contact with the inorganic insulating film;
a common electrode; and
an electrophoretic element disposed between the common electrode and the first pixel electrode, wherein
the first pixel electrode is electrically connected to the switching element in an opening of the capacitance electrode, a first hole of the organic insulating film, and a second hole of the inorganic insulating film,
a stacked body of the capacitance electrode, the inorganic insulating film, and the shield layer overlaps the electrophoretic element,
a first gap between the first pixel electrode and the second pixel electrode is less than a second gap between the first pixel electrode and the electrophoretic element.

### Claim 14 (depends on 13)

The display device of claim 13, wherein the first gap is ⅓ or less than the second gap.

### Claim 15 (depends on 14)

The display device of claim 14, wherein the first gap is 5 μm or less.