# US 12,111,549 B2 · Display device

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- Number: US 12,111,549 B2
- Document ID: US12111549B2
- Status: Granted
- Kind: B2
- Application number: 18/461,601
- Filed: 2023-09-06
- Published: 2023-12-28
- Granted: 2024-10-08
- Earliest claimed: 2021-03-09
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Mamoru Douyou
- Web page: https://patentgrep.com/patent/US12111549B2

## CPC

- G02F 1/1345: Conductors connecting electrodes to cell terminals
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- 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 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- 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 30/021: {of FETs having insulated gates [IGFET]}
- H10D 30/67: Thin-film transistors [TFT] {(Stacked nanowire, nanosheet or nanoribbon FETs H10D30/501)}
- 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, in a display device, one of the gate electrodes includes a first linear portion extending along the second direction, and a first projection portion projecting from the first linear portion and extending along the first direction, one of the first light shielding layers includes a second linear portion extending along the second direction, and a second projection portion projecting from the second linear portion and extending along the first direction, the first linear portion overlaps the second linear portion, the first projection portion overlaps the second projection portion, and the first projection portion and the second projection portion overlap at least one of the plurality of select lines.

## Claims

### Claim 1

A display device comprising:
a display area including a plurality of switching elements;
a plurality of signal lines;
a plurality of scan lines connected to the switching elements;
a signal line switch circuit connected to the signal lines and located outside the display area; and
a plurality of select lines extending in a first direction and arranged in a second direction, the plurality of select lines being connected to the signal line switch circuit, wherein
the signal line switch circuit includes a plurality of transistors connected to the plurality of the signal lines,
the plurality of transistors include a plurality of gate electrodes and a plurality of light shielding layers overlapping the plurality of gate electrodes,
each of the plurality of the select lines is connected to each of the plurality of gate electrodes,
at least one of the gate electrodes includes a first linear portion extending along the second direction, a first projection portion and a second portion oppositely extending from the tip of the first linear portion in an opposite direction of the first direction and the first projection portion projecting from the first linear portion and extending along the first direction,
at least one of the first light shielding layers includes a second linear portion extending along the second direction, and a second projection portion projecting from the second linear portion and extending along the first direction,
the first linear portion overlaps the second linear portion,
the first projection portion overlaps the second projection portion, and
the first projection portion and the second projection portion overlap at least one of the plurality of select lines.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein each of the light shielding layers does not contact the overlapping gate electrode.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein the light shielding layer is a back gate of the transistor, and is driven in a floating state.

### Claim 4 (depends on 3)

The display device according to claim 3, further comprising a connect line connecting sources of the plurality of transistors, wherein
each of the plurality of select lines is connected to each of the plurality of gate electrodes,
the gate electrode having the first projection portion includes a third projection portion projecting from the first linear portion and extending along the first direction,
the light shielding layer having the second projection portion includes a fourth projection portion extending from the second linear portion and extending along the first direction, and
the third projection portion and the fourth projection portion overlap with each other between the connection line and one of the plurality of select lines.

### Claim 5 (depends on 1)

The display device according to claim 1, wherein the transistor is a transmission gates each including an n-channel transistor and a p-channel transistor.