# US 11,307,473 B2 · Display device including a strip oxide semiconductor overlapping an opening

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- Number: US 11,307,473 B2
- Document ID: US11307473B2
- Status: Granted
- Kind: B2
- Application number: 17/092,862
- Filed: 2020-11-09
- Published: 2021-02-25
- Granted: 2022-04-19
- Earliest claimed: 2017-01-20
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Hitoshi Tanaka; Kazuhide Mochizuki
- Web page: https://patentgrep.com/patent/US11307473B2

## CPC

- G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- G02F 1/136209: {Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- H10D 30/6723: {having light shields}
- H10D 30/6734: {having gate electrodes arranged on both top and bottom sides of the channel, e.g. dual-gate TFTs}
- H10D 30/6755: {Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate}
- H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO}
- H10D 86/441: {Interconnections, e.g. scanning lines}
- H10D 86/60: wherein the TFTs are in active matrices
- G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]}
- G02F 1/13606: {having means for reducing parasitic capacitance}
- G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer}
- G02F 1/13685: {Top gates}
- G02F 2202/10: semiconductor
- 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
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

According to one embodiment, a display device includes a gate line extending in a first direction, first and second source lines crossing the gate line and arranged in the first direction, a first light-shielding layer having first and second openings, and an oxide semiconductor layer crossing the gate line, and in the display device, the first opening and the second opening are arranged in a second direction crossing the first direction between the first source line and the second source line, the gate line is located between the first opening and the second opening, and the oxide semiconductor layer has a first overlapping portion overlapping the first opening.

## Claims

### Claim 1

A display device comprising:
an insulating substrate;
a gate line extending in a first direction on the insulating substrate;
a first source line and a second source line crossing the gate line on the insulating substrate and arranged in the first direction;
a switching element including a strip oxide semiconductor and electrically connected to the gate line and the second source line; and
a first pixel electrode and a second pixel electrode arranged in a second direction crossing the first direction between the first source line and the second source line, wherein
the first pixel electrode and the second pixel electrode are located via a space in the second direction,
the gate line is located in the space between the first pixel electrode and the second pixel electrode,
the strip oxide semiconductor includes a first end electrically connected to the second pixel electrode, a second end electrically connected to the second source line, and a first portion located between the first end and the second end,
the first portion of the strip oxide semiconductor extends across the gate line between the first source line and the second source line, and
a part of the strip oxide semiconductor overlaps the first pixel electrode, and does not overlap the gate line.

### Claim 2 (depends on 1)

The display device of claim 1, wherein
the first pixel electrode has two electrode portions,
the first portion extends in parallel to the two electrode portions, and
the first portion is located between the two electrode portions.

### Claim 3 (depends on 1)

The display device of claim 1, wherein
the strip oxide semiconductor further includes a second portion located between the first portion and the second end,
the second portion extends in parallel to the gate line and connected to the first portion, and
the second portion overlaps the first pixel electrode.

### Claim 4 (depends on 3)

The display device of claim 3, wherein
the first pixel electrode has two electrode portions,
the first portion extends in parallel to the two electrode portions,
the first portion is located between the two electrode portions,
the second portion overlaps one of the two electrode portions, and
another of the two electrode portions does not overlaps the second portion.

### Claim 5 (depends on 1)

The display device of claim 1, further comprising an insulating film and a relay electrode, wherein
the insulating film is between the relay electrode and the strip oxide semiconductor,
the second pixel electrode is connected to the strip oxide semiconductor via the relay electrode, and
the relay electrode is in contact with the first end of the strip oxide semiconductor at a first contact hole formed in the insulating film.

### Claim 6 (depends on 5)

The display device of claim 5, wherein
the second pixel electrode has two electrode portions, and
the first contact hole is located between the two electrode portions.

### Claim 7 (depends on 5)

The display device of claim 5, wherein
the second pixel electrode has two electrode portions,
the first contact hole overlaps one of the two electrode portions, and
another of the two electrode portions does not overlaps the first contact hole.

### Claim 8 (depends on 3)

The display device of claim 3, wherein
the strip oxide semiconductor further includes a third portion located between the first end and the first portion,
the third portion extends in parallel to the second portion and connects to the first portion,
the gate line is located between the second portion and the third portion.

### Claim 9 (depends on 8)

The display device of claim 8, wherein
a part of the third portion is exposed from the second pixel electrode.

### Claim 10 (depends on 8)

The display device of claim 8, wherein
the strip oxide semiconductor further includes a fourth portion located between the first end and the third portion, and
the fourth portion extends in parallel to the first portion, and connects to the third portion.

### Claim 11 (depends on 10)

The display device of claim 10, wherein
the second pixel electrode has two electrode portions,
the fourth portion overlaps one of the two electrode portions, and
another of the two electrode portions does not overlaps the fourth portion.

### Claim 12 (depends on 1)

The display device of claim 1, further comprising a light-shielding layer overlapping the gate line and extending in the first direction, and electrically connected to the gate line, wherein
the first portion of the strip oxide semiconductor extends across the light-shielding layer between the first source line and the second source line.

### Claim 13 (depends on 12)

The display device of claim 12, wherein
a width of the gate line in the second direction is smaller than a width of light-shielding layer in the second direction.