# US 12,007,634 B2 · Display device and manufacturing method therefor

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- Number: US 12,007,634 B2
- Document ID: US12007634B2
- Status: Granted
- Kind: B2
- Application number: 17/633,185
- Filed: 2020-08-04
- Published: 2022-09-01
- Granted: 2024-06-11
- Earliest claimed: 2019-08-06
- Assignees: Tovis Co., Ltd.
- Applicants: Tovis Co. Ltd.
- Inventors: Yong Min Park; In Suk Lee; Won Gyu Lee; Eun Sung Kim
- Web page: https://patentgrep.com/patent/US12007634B2

## CPC

- G02F 1/133302: {Rigid substrates, e.g. inorganic substrates}
- G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels}
- G02F 1/133368: {Cells having two substrates with different characteristics, e.g. different thickness or material}
- G02F 1/133388: {with constructional differences between the display region and the peripheral region}
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- G06F 1/1637: {Details related to the display arrangement, including those related to the mounting of the display in the housing}
- H10K 59/871: {Self-supporting sealing arrangements}
- H10K 2102/351: {Thickness}
- 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
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

Provided are a display device and a fabrication method thereof. The display device includes a first substrate and a second substrate having one surface opposite to one surface of the first substrate. The first substrate includes a first-one portion that overlaps the second substrate in a thickness direction and a first-two portion that does not overlap the second substrate. The second substrate includes a second portion that overlaps the first substrate in the thickness direction. The first-two portion has a greater thickness than the first-one portion. The second portion includes a second-one portion that overlaps the first-one portion in the thickness direction and a second-two portion disposed between the second-one portion and the first-two portion in a plan view. The second-two portion has a greater thickness than the second-one portion. The second-two portion is disposed so as not to overlap the first-two portion in the thickness direction.

## Claims

### Claim 1

A display device comprising:
a first substrate; and
a second substrate including one surface opposite to one surface of the first substrate,
wherein
the first substrate comprises a first-one portion that overlaps the second substrate in a thickness direction and a first-two portion that does not overlap the second substrate,
the second substrate comprises a second portion that overlaps the first substrate in the thickness direction,
the first-two portion has a greater thickness than the first-one portion,
the second portion comprises a second-one portion that overlaps the first-one portion in the thickness direction and a second-two portion disposed between the second-one portion and the first-two portion in a plan view,
the second-two portion has a greater thickness than the second-one portion,
the second-two portion is disposed so as not to overlap the first-two portion in the thickness direction,
wherein the first-one portion comprises a first-one-one portion and a first-one-two portion disposed between the first-one-one portion and the first-two portion, and the first-one-one portion has a greater thickness than the first-one-two portion,
wherein the second-one portion comprises a second-one-one portion disposed to overlap the first-one-one portion in the thickness direction and a second-one-two portion disposed to overlap the first-one-two portion in the thickness direction, and the second-one-one portion has a greater thickness than the second-one-two portion,
wherein the first-one-one portion has a smaller thickness than the first-two portion and the second-one-one portion has a smaller thickness than the second-two portion, and
wherein the first-one-two portion and the second-one-two portion are multi-etched regions, the first-one-one portion and the second-one-one portion are single-etched regions, and the first-two portion and the second-two portion are non-etched regions.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the width of the first-one-one portion toward the first-one-two portion is the same as the width of the second-one-one portion toward the second-one-two portion.

### Claim 3 (depends on 1)

The display device of claim 1, wherein the width of the first-two portion toward the first-one portion is smaller than the width of the second-two portion toward the first-one portion.

### Claim 4 (depends on 1)

The display device of claim 1, wherein the first substrate and the second substrate include curved surfaces obtained by bending the first-one portion and the second-one portion, respectively.

### Claim 5 (depends on 1)

The display device of claim 1, further comprising a driving connection film attached to the first-two portion of the first substrate.

### Claim 6 (depends on 5)

The display device of claim 5, further comprising a driving circuit board connected to the driving connection film.

### Claim 7

A fabrication method of a display device, the fabrication method comprising operations of:
preparing a flat display device including a first substrate member, a second substrate member having one surface opposite to one surface of the first substrate member, and a driving connection film attached to a part of the first substrate member protruding at one end farther than the second substrate member;
asymmetrically masking, at one end, the other surface, which is opposite to the one surface of the first substrate member, and the other surface, which is opposite to the one surface of the second substrate member; and
first etching the other surface of the first substrate member and the other surface of the second substrate member,
wherein in the operation of asymmetrically masking, at one end, the other surface, which is opposite to the one surface of the first substrate member, and the other surface, which is opposite to the one surface of the second substrate member, the length of the masked surface of the first substrate member is smaller than the length of the masked surface of the second substrate member, and
wherein after the operation of first etching the other surface of the first substrate member and the other surface of the second substrate member, the fabrication method further comprises an operation of masking the other surface of the first substrate member and the other surface of the second substrate member at the other end facing the one end.

### Claim 8 (depends on 7)

The fabrication method of claim 7, wherein in the operation of masking the other surface of the first substrate member and the other surface of the second substrate member at the other end facing the one end, the length of the masked surface of the first substrate member is the same as the length of the masked surface of the second substrate member.