# US 11,906,870 B2 · Display device

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- Number: US 11,906,870 B2
- Document ID: US11906870B2
- Status: Granted
- Kind: B2
- Application number: 17/071,088
- Filed: 2020-10-15
- Published: 2021-01-28
- Granted: 2024-02-20
- Earliest claimed: 2018-04-19
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Koji Ishizaki; Yoshitaka Ozeki; Takahiro Takeuchi; Koshiro Moriguchi; Tomoyasu Hirano
- Web page: https://patentgrep.com/patent/US11906870B2

## CPC

- G02F 1/16766: for active matrices
- G02F 1/167: by electrophoresis
- G02F 1/16756: Insulating layers
- G09F 9/30: 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)
- H10D 30/67: Thin-film transistors [TFT] {(Stacked nanowire, nanosheet or nanoribbon FETs H10D30/501)}
- G02F 1/16757: Microcapsules
- G02F 2001/1678: {characterised by the composition or particle type}
- 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
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

According to one embodiment, a display device includes a first conductive layer, a second conductive layer overlapping the first conductive layer, a first capacitive portion located in a same layer as the first conductive layer, a second capacitive portion located in a same layer as the second conductive layer and overlapping the first capacitive portion, a first inorganic insulating film located between the first conductive layer and the second conductive layer and between the first capacitive portion and the second capacitive portion, a drain electrode electrically connected to the second capacitive portion, a pixel electrode electrically connected to the drain electrode.

## Claims

### Claim 1

A display device comprising:
a base;
a scanning line comprising a first conductive layer and a second conductive layer overlapping the first conductive layer;
a first capacitive portion located in a same layer as the first conductive layer;
a second capacitive portion located in a same layer as the second conductive layer and overlapping the first capacitive portion;
a first inorganic insulating film located between the first conductive layer and the second conductive layer and between the first capacitive portion and the second capacitive portion;
a switching element comprising a drain electrode electrically connected to the second capacitive portion and a semiconductor layer electrically connected to the drain electrode;
a pixel electrode electrically connected to the drain electrode;
a common electrode having a same potential as the first capacitive portion; and
an electrophoretic element located between the pixel electrode and the common electrode.

### Claim 2 (depends on 1)

The display device of claim 1, further comprising:
a signal line electrically connected to the semiconductor layer; and
an organic insulating film located between the signal line and the pixel electrode, wherein
the electrophoretic element is bonded to the organic insulating film on an outer side of the pixel electrode.

### Claim 3 (depends on 2)

The display device of claim 2, further comprising:
a second inorganic insulating film located between the second capacitive portion and the semiconductor layer and being in contact with the first inorganic insulating film; and
a third inorganic insulating film located between the semiconductor layer and the drain electrode and being in contact with the second inorganic insulating film and the organic insulating film, wherein
the first conductive layer is located between the base and the semiconductor layer.

### Claim 4 (depends on 3)

The display device of claim 3, further comprising a third capacitive portion located in a same layer as the semiconductor layer, overlapping the second capacitive portion, and having a same potential as the first capacitive portion.

### Claim 5 (depends on 2)

The display device of claim 2, further comprising:
a second inorganic insulating film located between the second capacitive portion and the drain electrode and being in contact with the first inorganic insulating film and the organic insulating film; and
a third inorganic insulating film located between the semiconductor layer and the first capacitive portion and being in contact with the first inorganic insulating film, wherein
the semiconductor layer is located between the base and the first conductive layer.

### Claim 6 (depends on 5)

The display device of claim 5, further comprising a third capacitive portion located in a same layer as the semiconductor layer, overlapping the first capacitive portion, and having a same potential as the second capacitive portion.

### Claim 7 (depends on 1)

The display device of claim 1, wherein an edge of the first capacitive portion and an edge of the second capacitive portion each overlap the pixel electrode over an entire circumference thereof.

### Claim 8 (depends on 1)

The display device of claim 1, further comprising a feed line extending along a same direction as the scanning line, wherein
the feed line includes the first capacitive portion.

### Claim 9 (depends on 8)

The display device of claim 8, wherein
the feed line has a first width at a position overlapping the pixel electrode and has a second width on an outer side of the pixel electrode, and
the first width is less than a width of the first capacitive portion, and
the second width is less than the first width.

### Claim 10

A display device comprising:
a base;
a first conductive layer and a first capacitive portion located above the base;
a first inorganic insulating film covering the first conductive layer and the first capacitive portion;
a second conductive layer located above the first inorganic insulating film and electrically connected to the first conductive layer;
a second capacitive portion located above the first inorganic insulating film and overlapping the first capacitive portion;
a second inorganic insulating film covering the second conductive layer and the second capacitive portion;
an organic insulating film located above the second inorganic insulating film;
a pixel electrode located above the organic insulating film;
a common electrode located above the pixel electrode and having a same potential as the first capacitive portion;
an electrophoretic element located between the pixel electrode and the common electrode;
a third capacitive portion located above the second inorganic insulating film, overlapping the second capacitive portion, and having a same potential as the first capacitive portion; and
a third inorganic insulating film located between the second inorganic insulating film and the organic insulating film and covering the third capacitive portion.

### Claim 11

A display device comprising:
a base;
a first conductive layer and a first capacitive portion located above the base;
a first inorganic insulating film covering the first conductive layer and the first capacitive portion;
a second conductive layer located above the first inorganic insulating film and electrically connected to the first conductive layer;
a second capacitive portion located above the first inorganic insulating film and overlapping the first capacitive portion;
a second inorganic insulating film covering the second conductive layer and the second capacitive portion;
an organic insulating film located above the second inorganic insulating film;
a pixel electrode located above the organic insulating film;
a common electrode located above the pixel electrode and having a same potential as the first capacitive portion;
an electrophoretic element located between the pixel electrode and the common electrode;
a third capacitive portion located above the base, overlapping the first capacitive portion, and having a same potential as the second capacitive portion; and
a third inorganic insulating film located between the base and the first inorganic insulating film and covering the third capacitive portion.

### Claim 12

A display device comprising:
a base;
a scanning line comprising a first conductive layer and a second conductive layer overlapping the first conductive layer;
a first capacitive portion located in a same layer as the first conductive layer;
a second capacitive portion located in a same layer as the second conductive layer and overlapping the first capacitive portion;
a first inorganic insulating film located between the first conductive layer and the second conductive layer and between the first capacitive portion and the second capacitive portion;
a switching element comprising a drain electrode electrically connected to the second capacitive portion and a semiconductor layer electrically connected to the drain electrode; and
a pixel electrode electrically connected to the drain electrode.

### Claim 13 (depends on 12)

The display device of claim 12, further comprising:
a second inorganic insulating film located between the second capacitive portion and the semiconductor layer and being in contact with the first inorganic insulating film; and
a third inorganic insulating film located between the semiconductor layer and the drain electrode and being in contact with the second inorganic insulating film and an organic insulating located above the second inorganic insulating film, wherein
the first conductive layer is located between the base and the semiconductor layer.

### Claim 14 (depends on 11)

The display device of claim 11, further comprising a third capacitive portion located in a same layer as the semiconductor layer, overlapping the second capacitive portion, and having a same potential as the first capacitive portion.

### Claim 15 (depends on 12)

The display device of claim 12, further comprising:
a second inorganic insulating film located between the second capacitive portion and the drain electrode and being in contact with the first inorganic insulating film and the organic insulating film; and
a third inorganic insulating film located between the semiconductor layer and the first capacitive portion and being in contact with the first inorganic insulating film, wherein
the semiconductor layer is located between the base and the first conductive layer.

### Claim 16 (depends on 15)

The display device of claim 15, further comprising a third capacitive portion located in a same layer as the semiconductor layer, overlapping the first capacitive portion, and having a same potential as the second capacitive portion.